MM74HC138MTCX - ON SEMICONDUCTOR

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September 1983

Revised February 1999

MM74HC138 3-to-8 Line Decoder

MM74HC138

3-to-8 Line Decoder

General Descript ion

The MM74HC138 decoder utilizes advanced silicon-gate

CMOS technology and is well suited to memory address

decoding or data routing applications. The circuit features

high noise immunity and low power consumption usually

associated with CMOS circuitry, yet ha s speeds compar a-

ble to low power Schottky TTL logic.

The MM74H C138 has 3 binary select inp uts (A, B, an d C).

If the device is enabled, these inputs determine which one

of the eight normally HIGH outputs will go LOW. Two active

LOW and one active HIGH enables (G1, G2A and G2B)

are provided to ease the cascading of decoders.

The decoder’s outputs can drive 10 low power Schottky

TTL eq uivalent lo ads, and are function ally and pi n equiva-

lent to th e 74LS138. Al l inputs are p rotected fr om damage

due to static discharge by diodes to VCC and ground.

Features

■Typical propagation delay: 20 ns

■Wide power supply range: 2V–6V

■Low quiescen t curre nt: 80 µA maximum (74HC Series)

■Low input curre nt: 1 µA maximum

■Fanout of 10 LS-TTL loads

Ordering Code:

Devices also available in Tape and Reel. Specify by appending suffix letter “X ” to th e ordering co de.

Connection Diagram

Pin Assignment for DIP, SOIC, SOP a nd TSSOP

Order Number Package Number Package Description

MM74HC138M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow

MM74HC138SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

MM74HC138MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

MM74HC138N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

www.fairchildsemi.com 2

MM74HC138

Truth Table

H = HIGH Level, L = LOW Level, X = don’t care

Note 1: G2 = G2A+G2B

Logic Diagram

Inputs Outputs

Enable Select

G1 G2 (Note 1)C B A Y0Y1Y2Y3Y4Y5Y6Y7

X H XXXHHHHHHHH

L X XXXHHHHHHHH

H L LLLLHHHHHHH

H L LLHHLHHHHHH

H L LHLHHLHHHHH

H L LHHHHHLHHHH

H L HLLHHHHLHHH

H L HLHHHHHHLHH

H L HHLHHHHHHLH

H L HHHHHHHHHHL

3 www.fairchildsemi.com

MM74HC138

Absolute Maximum Ratings(Note 2)

(Note 3) Recommended Operating

Conditions

Note 2: Absolute M aximum Ra tings are those valu es beyond w hich dam-

age to the device may occur.

Note 3: Unless ot herwise spe c if ied all voltage s a re referenced to groun d.

Note 4: Power Dis sipation te mperature d erating — pl astic “N” pa ckage: −

12 mW/°C from 65°C to 85°C.

DC Electrical Characteristics (Note 5)

Note 5: For a p owe r su pp ly o f 5V ± 10% the worst case output voltages (VOH, and VOL) occu r for HC at 4.5V. Thus the 4.5V valu es sho uld be used when

designing with this supply. Worst case VIH and VIL o ccur at VCC = 5.5V and 4.5 V respective ly. (The VIH value at 5.5V is 3.85V. ) T he worst cas e leakage c ur-

rent (IIN, ICC, and I OZ) oc c ur for CMOS at th e higher vol ta ge and so the 6. 0V values should be use d.

Supply Voltage (VCC)− 0.5 to + 7.0V

DC Input Voltage (VIN)− 1.5 to VCC + 1.5V

DC Output Voltage (VOUT)− 0.5 to VCC + 0.5V

Clamp Diode Current (IIK, IOK)± 20 mA

DC Output Current, per pin (IOUT)± 25 mA

DC VCC or GND Current, per pin (ICC)± 50 mA

Storage Temperature Range (TSTG)− 65°C to + 150°C

Power Dissipation (PD)

(Note 4) 600 mW

S.O. Package only 500 mW

Lead Temperature (TL)

(Soldering 10 seconds) 260°C

Min Max Units

Supply Voltage (VCC)26V

DC Input or Output Voltage 0 VCC V

(VIN, VOUT)

Operating Temperature Range (TA)−40 +85 °C

Input Rise or Fall Times

(tr, tf) VCC = 2.0V 1000 ns

VCC = 4.5V 500 ns

VCC = 6.0V 400 ns

Symbol Parameter Conditions VCC TA = 25°CT

A = −40 to 85°CUnits

Typ Guaranteed Li m its

VIH Minimum HIGH Level 2.0V 1.5 1.5 V

Input Voltage 4.5V 3.15 3.15 V

6.0V 4.2 4.2 V

VIL Maximum LOW Level 2.0V 0.5 0.5 V

Input Voltage 4.5V 1.35 1.35 V

6.0V 1.8 1.8 V

VOH Minimum HIGH Level VIN = VIH or VIL

Output Voltage | IOUT | ≤ 20 µA 2.0V 2.0 1.9 1.9 V

4.5V 4.5 4.4 4.4 V

6.0V 6.0 5.9 5.9 V

VIN = VIH or VIL

|IOUT | ≤ 4.0 mA 4.5V 4.2 3.98 3.84 V

| IOUT | ≤ 5.2 mA 6.0V 5.7 5.48 5.34 V

VOL Maximum LOW Level VIN = VIH or VIL

Output Voltage | IOUT | ≤ 20 µA 2.0V 0 0.1 0.1 V

4.5V 0 0.1 0.1 V

6.0V 0 0.1 0.1 V

VIN = VIH or VIL

| IOUT | ≤ 4.0 mA 4.5V 0.2 0.26 0.33 V

| IOUT | ≤ 5.2 mA 6.0V 0.2 0.26 0.33 V

IIN Maximum Input VIN = VCC or GND 6.0V ±0.1 ±1.0 µA

Current

ICC Maximum Quiescent VIN = VCC or GND 6.0V 8.0 80 µA

Supply Current IOUT = 0 µA

www.fairchildsemi.com 4

MM74HC138

AC Electrical Characteristics

VCC = 5V, TA = 25°C, CL = 15 pF, tr = tf = 6 ns

AC Electrical Characteristics

CL = 50 pF, tr = tf = 6 ns (unless otherwise specified)

Note 6: CPD determines the no load dyna m ic pow er consumption, PD = CPD VCC2f + ICC VCC, and the no load dyna m ic c urrent consum ption,

IS = CPD VCC f + ICC.

Symbol Parameter Conditions Typ Guaranteed Units

Limit

tPLH Maximum Propagation 18 25 ns

Delay, Binary Select to any Output

tPHL Maximum Propagation 28 35 ns

Delay, Binary Select to any Output

tPHL, tPLH Maximum Propagation 18 25 ns

Delay, G1 to any Output

tPHL Maximum Propagation 23 30 ns

Delay G2A or G2B to

Output

tPLH Maximum Propagation 18 25 ns

Delay G2A or G2B to Output

Symbol Parameter Conditions VCC TA= 25°CT

A= −40 to 85°CUnits

Typ Guaranteed Limits

tPLH Maximum Propagation 2.0V 75 150 189 ns

Delay Binary Select to 4.5V 15 30 38 ns

any Output LOW-to-HIGH 6.0V 13 26 32 ns

tPHL Maximum Propagation 2.0V 100 200 252 ns

Delay Binary Select to any 4.5V 20 40 50 ns

Output HIGH-to-LOW 6.0V 17 34 43 ns

tPHL, tPLH Maximum Propagation 2.0V 75 150 189 ns

Delay G1 to any 4.5V 15 30 38 ns

Output 6.0V 13 26 32 ns

tPHL Maximum Propagation 2.0V 82 175 221 ns

Delay G2A or G2B to 4.5V 28 35 44 ns

Output 6.0V 22 30 37 ns

tPLH Maximum Propagation 2.0V 75 150 189 ns

Delay G2A or G2B to 4.5V 15 30 38 ns

Output 6.0V 13 26 32 ns

tTLH, tTHL Output Rise and 2.0V 30 75 95 ns

Fall Time 4.5V 8 15 19 ns

6.0V 7 13 16 ns

CIN Maximum Input 3 10 10 pF

Capacitance

CPD Power Dissipation (Note 6) 75 pF

Capacitance

5 www.fairchildsemi.com

MM74HC138

Physical Dim ensions inches (millimeters) unless otherwise noted

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow

Package Number M16A

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

Package Number M16D

www.fairchildsemi.com 6

MM74HC138

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Package Number MTC16

Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.

MM74HC138 3-to-8 Line Decoder

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD

SEMICONDUCTOR CORPORATION. As used herein:

1. Life suppor t de vices o r syst ems are devices or systems

which, (a) are intended for surgical implant into the

body, or (b) support or sustain life, and (c) whose failure

to perform when properly used in accordance with

instruct ions fo r use pr ovi de d in the labe l ing, can be re a-

sonably expected to result in a significant injury to the

user.

2. A criti cal com ponen t in any compo nent o f a l ife supp ort

device or system whose failure to perform can be rea-

sonabl y e xpec ted to c ause th e fa i lure of the li fe s upp or t

device or system, or to affect its safety or effectiveness.

www.fairchildsemi.com

Physical Dim ensions inches (millimeters) unless otherwise noted (Continued)

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

Package Number N16E

www.onsemi.com

ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.

ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent

coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.

ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,

regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or

specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer

application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not

designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification

in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized

application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and

expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such

claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This

literature is subject to all applicable copyright laws and is not for resale in any manner.

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