Motorola MC74HC138ADT, MC74HC138AD, MC54HC138AJ, MC74HC138AN Datasheet

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SEMICONDUCTOR TECHNICAL DATA

1

REV 6

 Motorola, Inc. 1995

10/95

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High–Performance Silicon–Gate CMOS

The MC54/74HC138A is identical in pinout to the LS138. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.

The HC138A decodes a three–bit Address to one–of–eight active–low outputs. This device features three Chip Select inputs, two active–low and one active–high to facilitate the demultiplexing, cascading, and chip–selecting functions. The demultiplexing function is accomplished by using the Address inputs to select the desired device output; one of the Chip Selects is used as a data input while the other Chip Selects are held in their active states.

• Output Drive Capability: 10 LSTTL Loads

• Outputs Directly Interface to CMOS, NMOS and TTL

• Operating Voltage Range: 2.0 to 6.0 V

• Low Input Current: 1.0

µA

• High Noise Immunity Characteristic of CMOS Devices

• In Compliance with the Requirements Defined by JEDEC Standard

No. 7A

• Chip Complexity: 100 FETs or 29 Equivalent Gates

LOGIC DIAGRAM

7

Y6

Y5

Y4

Y3

Y2

Y1

Y0

Y7

9

10

11

12

13

14

15

3

2

1

CS1 CS2

A0 A1 A2

ACTIVE–LOW

OUTPUTS

ADDRESS

INPUTS

CS3

CHIP–

SELECT

INPUTS

5

4

6

PIN 16 = V

CC

PIN 8 = GND

Inputs Outputs

CS1CS2 CS3 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7

X X H X X X H H H H H H H H X H X X X X H H H H H H H H L X X X X X H H H H H H H H

H L L L L L L H H H H H H H H L L L L H H L H H H H H H H L L L H L H H L H H H H H H L L L H H H H H L H H H H

H L L H L L H H H H L H H H H L L H L H H H H H H L H H H L L H H L H H H H H H L H H L L H H H H H H H H H H L

FUNCTION TABLE

H = high level (steady state); L = low level (steady state); X = don’t care

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PIN ASSIGNMENT

13

14

15

16

9

10

11

12

5

4

3

2

1

8

7

6

A0

CS2

A2

A1

Y7

CS1

CS3

GND

Y3

Y2

Y1

Y0

V

CC

Y5

Y4

Y6

D SUFFIX

SOIC PACKAGE

CASE 751B–05

N SUFFIX

PLASTIC PACKAGE

CASE 648–08

ORDERING INFORMATION

MC54HCXXXAJ MC74HCXXXAN MC74HCXXXAD MC74HCXXXADT

Ceramic Plastic SOIC TSSOP

1

16

1

16

1

16

DT SUFFIX

TSSOP PACKAGE

CASE 948F–01

J SUFFIX

CERAMIC PACKAGE

CASE 620–10

1

16

MC54/74HC138A

MOTOROLA High–Speed CMOS Logic Data

DL129 — Rev 6

2

MAXIMUM RATINGS*

Symbol

Parameter

Value

Unit

V

CC

DC Supply Voltage (Referenced to GND)

– 0.5 to + 7.0

V

in

DC Input Voltage (Referenced to GND)

– 0.5 to VCC + 0.5

V

out

DC Output Voltage (Referenced to GND)

– 0.5 to VCC + 0.5

V

I

in

DC Input Current, per Pin

± 20

mA

I

out

DC Output Current, per Pin

± 25

mA

I

CC

DC Supply Current, VCC and GND Pins

± 50

mA

P

D

Power Dissipation in Still Air,Plastic or Ceramic DIP†

SOIC Package†

TSSOP Package†

750 500 450

mW

T

stg

Storage Temperature

– 65 to + 150

_

C

T

L

Lead Temperature, 1 mm from Case for 10 Seconds

(Plastic DIP, SOIC or TSSOP Package)

(Ceramic DIP)

260 300

_

C

*Maximum Ratings are those values beyond which damage to the device may occur.

Functional operation should be restricted to the Recommended Operating Conditions.

†Derating — Plastic DIP: – 10 mW/_C from 65_ to 125_C

Ceramic DIP: – 10 mW/_C from 100_ to 125_C SOIC Package: – 7 mW/_C from 65_ to 125_C TSSOP Package: – 6.1 .W/_C from 65_ to 125_C

For high frequency or heavy load considerations, see Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D).

RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

Min

Max

Unit

V

CC

DC Supply Voltage (Referenced to GND)

2.0

6.0

V

Vin, V

out

DC Input Voltage, Output Voltage (Referenced to GND)

0

V

CC

V

T

A

Operating Temperature, All Package Types

– 55

+ 125

_

C

tr, t

f

Input Rise and Fall Time VCC = 2.0 V

(Figure 2) VCC = 4.5 V

VCC = 6.0 V

0 0 0

1000

500 400

ns

DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)

Guaranteed Limit

Symbol

Parameter

Test Conditions

V

CC V

–55_C to

25_C

v

85_Cv 125_C

Unit

V

IH

Minimum High–Level Input Voltage

V

out

= 0.1 V or VCC – 0.1 V

|I

out

| v 20 µA

2.0

3.0

4.5

6.0

1.5

2.1

3.15

4.2

1.5

2.1

3.15

4.2

1.5

2.1

3.15

4.2

V

IL

Maximum Low–Level Input Voltage

V

out

= 0.1 V or VCC – 0.1 V

|I

out

| v 20 µA

2.0

3.0

4.5

6.0

0.5

0.9

1.35

1.8

0.5

0.9

1.35

1.8

0.5

0.9

1.35

1.8

V

Vin = VIH or V

IL

|I

out

| v 20 µA

2.0

4.5

6.0

1.9

4.4

5.9

1.9

4.4

5.9

1.9

4.4

5.9

Vin = VIH or VIL|I

out

| v 2.4 mA

|I

out

| v 4.0 mA

|I

out

| v 5.2 mA

3.0

4.5

6.0

2.48

3.98

5.48

2.34

3.84

5.34

2.20

3.70

5.20

This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high–impedance circuit. For proper operation, Vin and V

out

should be constrained to the

range GND v (Vin or V

out

) v VCC.

Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open.

V

OH

Minimum High–Level Output Voltage

V

MC54/74HC138A

High–Speed CMOS Logic Data DL129 — Rev 6

3 MOTOROLA

DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)

Unit

Guaranteed Limit

V

CC

V

Test Conditions

Parameter

Symbol

Unit

v

125_C

v

85_C

–55_C to

25_C

V

CC

V

Test Conditions

Parameter

Symbol

Vin = VIH or V

IL

|I

out

| v 20 µA

2.0

4.5

6.0

0.1

Vin = VIH or VIL|I

out

| v 2.4 mA

|I

out

| v 4.0 mA

|I

out

| v 5.2 mA

3.0

4.5

6.0

0.26

0.33

0.40

I

in

Maximum Input Leakage Current

Vin = VCC or GND

6.0

± 0.1

± 1.0

µA

I

CC

Maximum Quiescent Supply Current (per Package)

Vin = VCC or GND I

out

= 0 µA

6.0

4

40

160

µA

NOTE: Information on typical parametric values can be found in Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D).

AC ELECTRICAL CHARACTERISTICS (C

L

= 50 pF, Input tr = tf = 6.0 ns)

Guaranteed Limit

Symbol

Parameter

V

CC V

–55_C to

25_C

v

85_Cv 125_C

Unit

t

PLH

,

t

PHL

Maximum Propagation Delay, Input A to Output Y

(Figures 1 and 4)

2.0

3.0

4.5

6.0

135

90 27 23

170 125

34 29

205 165

41 35

ns

t

PLH

,

t

PHL

Maximum Propagation Delay, CS1 to Output Y

(Figures 2 and 4)

2.0

3.0

4.5

6.0

110

85 22 19

140 100

28 24

165 125

33 28

ns

t

PLH

,

t

PHL

Maximum Propagation Delay, CS2 or CS3 to Output Y

(Figures 3 and 4)

2.0

3.0

4.5

6.0

120

90 24 20

150 120

30 26

180 150

36 31

ns

t

TLH

,

t

THL

Maximum Output Transition Time, Any Output

(Figures 2 and 4)

2.0

3.0

4.5

6.0

75 30 15 13

95 40 19 16

110

55 22 19

ns

C

in

Maximum Input Capacitance

—

10

pF

NOTE: For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the Motorola High–

Speed CMOS Data Book (DL129/D).

Typical @ 25°C, VCC = 5.0 V

55

*Used to determine the no–load dynamic power consumption: PD = CPD V

CC

2

f + ICC VCC. For load considerations, see Chapter 2 of the

Motorola High–Speed CMOS Data Book (DL129/D).

V

OL

Maximum Low–Level Output Voltage

V

C

PD

Power Dissipation Capacitance (Per Package)*

pF

Motorola MC74HC138ADT, MC74HC138AD, MC54HC138AJ, MC74HC138AN Datasheet

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