74HC251; 74HCT251 8-input multiplexer; 3-state Rev. 4 -- 1 February 2016 Product data sheet 1. General description The 74HC251; 74HCT251 is an 8-bit multiplexer with eight binary inputs (I0 to I7), three select inputs (S0 to S2) and an output enable input (OE). The select inputs select one of the eight binary inputs and route it to the complementary outputs (Y and Y). A HIGH on OE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC. 2. Features and benefits Input levels: For 74HC251: CMOS level For 74HCT251: TTL level Low-power dissipation Non-inverting data path Specified in compliance with JEDEC standard no. 7A ESD protection: HBM JESD22-A114F exceeds 2 000 V MM JESD22-A115-A exceeds 200 V Multiple package options Specified from 40 C to +85 C and from 40 C to +125 C 3. Ordering information Table 1. Ordering information Type number 74HC251D Package Temperature range Name Description Version 40 C to +125 C SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 40 C to +125 C SSOP16 plastic shrink small outline package; 16 leads; body width 5.3 mm 40 C to +125 C TSSOP16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm 74HCT251D 74HC251DB 74HCT251DB 74HC251PW 74HCT251PW SOT338-1 SOT403-1 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 4. Functional diagram , Fig 1. , , , , , , , , < , , , , , 08/7,3/(;(5 6 < , 6 , 6 2( 2( 6 6 6 < DDD Logic symbol < Fig 2. DDD Functional diagram , , , , < , , < , , 6 Fig 3. 6 6 2( DDD Logic diagram 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 2 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 5. Pinning information 5.1 Pinning +& +&7 , 9&& , , , , , , < , < 6 2( +& +&7 , 6 *1' , , , , , < , < 6 6 2( 6 9&& , *1' Fig 4. 6 DDD DDD Pin configuration SO16 Fig 5. Pin configuration SSOP16 and TSSOP16 5.2 Pin description Table 2. Pin description Symbol Pin Description I0 to I7 4, 3, 2, 1, 15, 14, 13, 12 data inputs Y 5 multiplexer output Y 6 complementary multiplexer output OE 7 output enable input (active LOW) GND 8 ground (0 V) S0, S1, S2 11, 10, 9 common data select inputs VCC 16 supply voltage 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 3 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 6. Functional description Function table[1] Table 3. Input Output OE S2 H X X X X X X X X X X X Z Z L L L L L X X X X X X X H L L L L L H X X X X X X X L H L L L H X L X X X X X X H L L L L H X H X X X X X X L H L L H L X X L X X X X X H L L L H L X X H X X X X X L H L L H H X X X L X X X X H L L L H H X X X H X X X X L H L H L L X X X X L X X X H L L H L L X X X X H X X X L H L H L H X X X X X L X X H L L H L H X X X X X H X X L H L H H L X X X X X X L X H L L H H L X X X X X X H X L H L H H H X X X X X X X L H L L H H H X X X X X X X H L H [1] S1 S0 I0 I1 I2 I3 I4 I5 I6 I7 Y Y H = HIGH voltage level; L = LOW voltage level; X = don't care; Z = high-impedance OFF-state. 7. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions VCC supply voltage IIK input clamping current IOK output clamping current VO < 0.5 V or VO > VCC + 0.5 V - 20 mA IO output current VO = 0.5 V to (VCC + 0.5 V) - 25 mA ICC supply current - +50 mA IGND ground current 50 - mA Tstg storage temperature 65 +150 C Ptot total power dissipation VI < 0.5 V or VI > VCC + 0.5 V Unit 0.5 +7 V - 20 mA SO16 package [1] - 500 mW (T)SSOP16 package [2] - 500 mW For SO16 package: Ptot derates linearly with 8 mW/K above 70 C. [2] For SSOP16 and TSSOP16 packages: Ptot derates linearly with 5.5 mW/K above 60 C. Product data sheet Max Tamb = 40 C to +125 C [1] 74HC_HCT251 Min All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 4 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 8. Recommended operating conditions Table 5. Recommended operating conditions Voltages are referenced to GND (ground = 0 V) Symbol Parameter Conditions 74HC251 74HCT251 Unit Min Typ Max Min Typ Max 2.0 5.0 6.0 4.5 5.0 5.5 V input voltage 0 - VCC 0 - VCC V output voltage 0 - VCC 0 - VCC V VCC supply voltage VI VO Tamb ambient temperature t/V input transition rise and fall rate 40 +25 +125 40 +25 +125 VCC = 2.0 V - - 625 - - - ns/V C VCC = 4.5 V - 1.67 139 - 1.67 139 ns/V VCC = 6.0 V - - 83 - - - ns/V 9. Static characteristics Table 6. Static characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter Tamb = 25 C Conditions Min Typ Tamb = 40 C to +85 C Max Min Max Tamb = 40 C to Unit +125 C Min Max 74HC251 VIH VIL VOH VOL HIGH-level input voltage LOW-level input voltage HIGH-level output voltage LOW-level output voltage VCC = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V VCC = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V VCC = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V VCC = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V IO = 20 A; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V IO = 20 A; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V IO = 20 A; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V IO = 4.0 mA; VCC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V IO = 5.2 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V IO = 20 A; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V IO = 20 A; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V IO = 20 A; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V IO = 4.0 mA; VCC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V IO = 5.2 mA; VCC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V VI = VIH or VIL VI = VIH or VIL II input leakage current VI = VCC or GND; VCC = 6.0 V - - 0.1 - 1.0 - 1.0 A IOZ OFF-state output current VI = VIH or VIL; VO = VCC or GND; VCC = 6.0 V - - 0.5 - 5.0 - 10.0 A 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 5 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state Table 6. Static characteristics ...continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Tamb = 25 C Symbol Parameter Conditions ICC supply current VI = VCC or GND; IO = 0 A; VCC = 6.0 V CI input capacitance Min Tamb = 40 C to +85 C Tamb = 40 C to Unit +125 C Typ Max Min Max Min Max - - 8.0 - 80 - 160 - 3.5 - A pF 74HCT251 VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 1.6 - 2.0 - 2.0 - V VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 - 0.8 - 0.8 V VOH HIGH-level output voltage VI = VIH or VIL; VCC = 4.5 V IO = 20 A 4.4 4.5 - 4.4 - 4.4 - V IO = 4 mA 3.98 4.32 - 3.84 - 3.7 - V LOW-level output voltage VI = VIH or VIL; VCC = 4.5 V IO = 20 A - 0 0.1 - 0.1 - 0.1 V IO = 4.0 mA - 0.15 0.26 - 0.33 - 0.4 V VOL II input leakage current VI = VCC or GND; VCC = 5.5 V - - 0.1 - 1.0 - 1.0 A IOZ OFF-state output current VI = VIH or VIL; VO = VCC or GND; VCC = 5.5 V - - 0.5 - 5.0 - 10 A ICC supply current VI = VCC or GND; IO = 0 A; VCC = 5.5 V - - 8.0 - 80 - 160 A ICC additional supply current VI = VCC 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A - 100 360 - 450 - 490 A per input pin; In inputs CI input capacitance 74HC_HCT251 Product data sheet per input pin; OE input - 150 540 - 675 - 735 A per input pin; Sn input - 150 540 - 675 - 735 A - 3.5 - pF All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 6 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 10. Dynamic characteristics Table 7. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit, see Figure 9. Symbol Parameter Tamb = 25 C Conditions Tamb = 40 C to +85 C Tamb = 40 C to +125 C Min Typ Max Min Max Min Max Unit 74HC251 tpd propagation delay In to Y; see Figure 6 [1] VCC = 2.0 V - 50 170 - 215 - 255 ns VCC = 4.5 V - 18 34 - 43 - 51 ns VCC = 5 V; CL = 15 pF - 15 - - - - - ns - 14 29 - 37 - 43 ns VCC = 2.0 V - 55 175 - 220 - 265 ns VCC = 4.5 V - 20 35 - 44 - 53 ns VCC = 5 V; CL = 15 pF - 17 - - - - - ns - 16 30 - 37 - 45 ns VCC = 2.0 V - 66 205 - 255 - 310 ns VCC = 4.5 V - 24 41 - 51 - 62 ns VCC = 6.0 V In to Y; see Figure 6 [1] VCC = 6.0 V Sn to Y; see Figure 7 [1] VCC = 5 V; CL = 15 pF - 20 - - - - - ns VCC = 6.0 V - 19 35 - 43 - 53 ns VCC = 2.0 V - 69 205 - 255 - 310 ns VCC = 4.5 V - 25 41 - 51 - 62 ns VCC = 5 V; CL = 15 pF - 21 - - - - - ns - 20 35 - 43 - 53 ns VCC = 2.0 V - 36 140 - 175 - 210 ns VCC = 4.5 V - 13 28 - 35 - 42 ns - 10 24 - 30 - 36 ns VCC = 2.0 V - 39 140 - 170 - 210 ns VCC = 4.5 V - 14 28 - 35 - 42 ns - 11 24 - 30 - 36 ns VCC = 2.0 V - 19 75 - 95 - 110 ns VCC = 4.5 V - 7 15 - 19 - 22 ns - 6 13 - 16 - 19 ns - 44 - - - - - pF Sn to Y; see Figure 7 [1] VCC = 6.0 V ten enable time OE to Y, Y; see Figure 7 [2] VCC = 6.0 V tdis disable time OE to Y, Y; see Figure 7 [3] VCC = 6.0 V tt transition time [4] Y, Y; see Figure 6 VCC = 6.0 V CPD power dissipation capacitance 74HC_HCT251 Product data sheet CL = 50 pF; f = 1 MHz; VI = GND to VCC [5] All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 7 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state Table 7. Dynamic characteristics ...continued Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit, see Figure 9. Symbol Parameter Tamb = 25 C Conditions Tamb = 40 C to +85 C Tamb = 40 C to +125 C Unit Min Typ Max Min Max Min Max - 22 35 - 44 - 53 ns - 19 - - - - - ns - 22 35 - 44 - 53 ns - 19 - - - - - ns - 24 44 - 55 - 66 ns - 20 - - - - - ns VCC = 4.5 V - 25 44 - 55 - 66 ns VCC = 5 V; CL = 15 pF - 21 - - - - - ns - 13 28 - 35 - 42 ns - 13 - - - - - ns - 14 28 - 35 - 42 ns - 18 - - - - - ns - 7 15 - 19 - 22 ns - 46 - - - - - pF 74HCT251 propagation delay tpd [1] In to Y; see Figure 6 VCC = 4.5 V VCC = 5 V; CL = 15 pF [1] In to Y; see Figure 6 VCC = 4.5 V VCC = 5 V; CL = 15 pF [1] Sn to Y; see Figure 7 VCC = 4.5 V VCC = 5 V; CL = 15 pF [1] Sn to Y; see Figure 7 enable time ten [2] OE to Y, Y; see Figure 7 VCC = 4.5 V VCC = 5 V; CL = 15 pF [3] disable time OE to Y, Y; see Figure 7 tdis VCC = 4.5 V VCC = 5 V; CL = 15 pF transition time tt power dissipation capacitance CPD [1] [4] Y, Y; see Figure 6 VCC = 4.5 V [5] CL = 50 pF; f = 1 MHz; VI = GND to VCC tpd is the same as tPLH and tPHL. [2] ten is the same as tPZH and tPZL. [3] tdis is the same as tPLZ and tPHZ. [4] tt is the same as tTHL and tTLH. [5] CPD is used to determine the dynamic power dissipation (PD in W). PD = CPD VCC2 fi N + (CL VCC2 fo) where: fi = input frequency in MHz; fo = output frequency in MHz; CL = output load capacitance in pF; VCC = supply voltage in V; N = number of inputs switching; (CL VCC2 fo) = sum of outputs. 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 8 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 11. Waveforms 9, 90 ,QLQSXW 90 *1' W3+/ 92+ W3/+ 90 <RXWSXW 90 92/ W7/+ W7+/ W3/+ 92+ 90 <RXWSXW 92/ W3+/ 90 W7/+ W7+/ DDD Measurement points are given in Table 8. VOL and VOH are typical voltage output levels that occur with the output load. Fig 6. Propagation delay input (In) to output (Y, Y) and the output (Y, Y) transition time 9, 6Q2(LQSXW 90 90 *1' W3+/ 92+ W3/+ 90 <RXWSXW 90 92/ W7/+ W7+/ W3/+ 92+ 90 <RXWSXW 92/ W3+/ 90 W7/+ W7+/ DDD Measurement points are given in Table 8. VOL and VOH are typical voltage output levels that occur with the output load. Fig 7. Propagation delay input (Sn, OE) to output (Y, Y) 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 9 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 9, 2(LQSXW 90 *1' W3/= W3=/ 9&& RXWSXW /2:WR2)) 2))WR/2: 92/ 90 W3+= 92+ W3=+ RXWSXW +,*+WR2)) 2))WR+,*+ *1' 90 RXWSXWV HQDEOHG RXWSXWV GLVDEOHG RXWSXWV HQDEOHG DDH Measurement points are given in Table 8. VOL and VOH are typical voltage output levels that occur with the output load. Fig 8. Enable and disable times Table 8. Measurement points Type Input Output VM VM 74HC251 0.5VCC 0.5VCC 74HCT251 1.3 V 1.3 V 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 10 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 9, W: QHJDWLYH SXOVH 90 9 WI WU WU WI 9, SRVLWLYH SXOVH 9 90 90 90 W: 9&& 9&& * 9, 92 5/ 6 RSHQ '87 &/ 57 DDG Test data is given in Table 9. Definitions test circuit: RT = Termination resistance should be equal to output impedance Zo of the pulse generator. CL = Load capacitance including jig and probe capacitance. RL = Load resistance. S1 = Test selection switch. Fig 9. Test circuit for measuring switching times Table 9. Test data Type Input Load S1 position VI tr, tf CL RL tPHL, tPLH tPZH, tPHZ tPZL, tPLZ 74HC251 VCC 6 ns 15 pF, 50 pF 1 k open GND VCC 74HCT251 3V 6 ns 15 pF, 50 pF 1 k open GND VCC 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 11 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 12. Package outline 62SODVWLFVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP 627 ' ( $ ; F \ +( Y 0 $ = 4 $ $ $ $ SLQLQGH[ /S / H Z 0 ES GHWDLO; PP VFDOH ',0(16,216 LQFKGLPHQVLRQVDUHGHULYHGIURPWKHRULJLQDOPPGLPHQVLRQV 81,7 $ PD[ $ $ $ ES F ' ( H +( / /S 4 Y Z \ = PP LQFKHV R R 1RWH 3ODVWLFRUPHWDOSURWUXVLRQVRIPP LQFK PD[LPXPSHUVLGHDUHQRWLQFOXGHG 5()(5(1&(6 287/,1( 9(56,21 ,(& -('(& 627 ( 06 -(,7$ (8523($1 352-(&7,21 ,668('$7( Fig 10. Package outline SOT109-1 (SO16) 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 12 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 6623SODVWLFVKULQNVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP ' 627 ( $ ; F \ +( Y 0 $ = 4 $ $ $ $ SLQLQGH[ /S / GHWDLO; Z 0 ES H PP VFDOH ',0(16,216 PPDUHWKHRULJLQDOGLPHQVLRQV 81,7 $ PD[ $ $ $ ES F ' ( H +( / /S 4 Y Z \ = PP R R 1RWH 3ODVWLFRUPHWDOSURWUXVLRQVRIPPPD[LPXPSHUVLGHDUHQRWLQFOXGHG 287/,1( 9(56,21 627 5()(5(1&(6 ,(& -('(& -(,7$ (8523($1 352-(&7,21 ,668('$7( 02 Fig 11. Package outline SOT338-1 (SSOP16) 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 13 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 76623SODVWLFWKLQVKULQNVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP ' 627 ( $ ; F \ +( Y 0 $ = 4 $ SLQLQGH[ $ $ $ /S / H GHWDLO; Z 0 ES PP VFDOH ',0(16,216 PPDUHWKHRULJLQDOGLPHQVLRQV 81,7 $ PD[ $ $ $ ES F ' ( H +( / /S 4 Y Z \ = PP R R 1RWHV 3ODVWLFRUPHWDOSURWUXVLRQVRIPPPD[LPXPSHUVLGHDUHQRWLQFOXGHG 3ODVWLFLQWHUOHDGSURWUXVLRQVRIPPPD[LPXPSHUVLGHDUHQRWLQFOXGHG 287/,1( 9(56,21 627 5()(5(1&(6 ,(& -('(& -(,7$ (8523($1 352-(&7,21 ,668('$7( 02 Fig 12. Package outline SOT403-1 (TSSOP16) 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 14 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 13. Abbreviations Table 10. Abbreviations Acronym Description CMOS Complementary Metal Oxide Semiconductor DUT Device Under Test ESD ElectroStatic Discharge HBM Human Body Model MM Machine Model TTL Transistor-Transistor Logic MIL Military 14. Revision history Table 11. Revision history Document ID Release date Data sheet status Change notice Supersedes 74HC_HCT251 v.4 20160201 Product data sheet - 74HC_HCT251 v.3 Modifications: 74HC_HCT251 v.3 Modifications: 74HC_HCT251_CNV v.2 74HC_HCT251 Product data sheet * Type numbers 74HC251N and 74HCT251N (SOT38-4) removed. 20130709 Product data sheet - 74HC_HCT251_CNV v.2 * The format of this data sheet has been redesigned to comply with the new identity guidelines of NXP Semiconductors. * Legal texts have been adapted to the new company name where appropriate. 19970828 Product specification - All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 15 of 18 (c) Nexperia B.V. 2017. All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state 15. Legal information 15.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term `short data sheet' is explained in section "Definitions". [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nexperia.com. 15.2 Definitions Draft -- The document is a draft version only. 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This document supersedes and replaces all information supplied prior to the publication hereof. 74HC_HCT251 Product data sheet Suitability for use -- Nexperia products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of a Nexperia product can reasonably be expected to result in personal injury, death or severe property or environmental damage. Nexperia and its suppliers accept no liability for inclusion and/or use of Nexperia products in such equipment or applications and therefore such inclusion and/or use is at the customer's own risk. Applications -- Applications that are described herein for any of these products are for illustrative purposes only. Nexperia makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. 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Customer is responsible for doing all necessary testing for the customer's applications and products using Nexperia products in order to avoid a default of the applications and the products or of the application or use by customer's third party customer(s). Nexperia does not accept any liability in this respect. Limiting values -- Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. 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All rights reserved 74HC251; 74HCT251 Nexperia 8-input multiplexer; 3-state Export control -- This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. Non-automotive qualified products -- Unless this data sheet expressly states that this specific Nexperia product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. Nexperia accepts no liability for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without Nexperia's warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond Nexperia's specifications such use shall be solely at customer's own risk, and (c) customer fully indemnifies Nexperia for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond Nexperia's standard warranty and Nexperia's product specifications. Translations -- A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions. 15.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. 16. Contact information For more information, please visit: http://www.nexperia.com For sales office addresses, please send an email to: salesaddresses@nexperia.com 74HC_HCT251 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 4 -- 1 February 2016 17 of 18 (c) Nexperia B.V. 2017. All rights reserved Nexperia 74HC251; 74HCT251 8-input multiplexer; 3-state 17. Contents 1 2 3 4 5 5.1 5.2 6 7 8 9 10 11 12 13 14 15 15.1 15.2 15.3 15.4 16 17 (c) General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 1 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 Functional description . . . . . . . . . . . . . . . . . . . 4 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4 Recommended operating conditions. . . . . . . . 5 Static characteristics. . . . . . . . . . . . . . . . . . . . . 5 Dynamic characteristics . . . . . . . . . . . . . . . . . . 7 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 12 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 15 Legal information. . . . . . . . . . . . . . . . . . . . . . . 16 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 16 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Contact information. . . . . . . . . . . . . . . . . . . . . 17 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Nexperia B.V. 2017. All rights reserved For more information, please visit: http://www.nexperia.com For sales office addresses, please send an email to: salesaddresses@nexperia.com Date of release: 01 February 2016