Motorola MC74LVQ138SD, MC74LVQ138D, MC74LVQ138DT, MC74LVQ138M Datasheet



SEMICONDUCTOR TECHNICAL DATA

1

REV 1

 Motorola, Inc. 1996

1/96

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The MC74LVQ138 is a high performance, 1–of–8 decoder/
demultiplexer operating from a 2.7 to 3.6V supply. High impedance TTL
compatible inputs significantly reduce current loading to input drivers
while TTL compatible outputs offer improved switching noise
performance. The MC74LVQ138 is suitable for memory address
decoding and other TTL level bus oriented applications.

The MC74LVQ138 high–speed 1–of–8 decoder/demultiplexer accepts
three binary weighted inputs (A0, A1, A2) and, when enabled, provides
eight mutually exclusive active–LOW outputs (O0

–O7). The LVQ138

features three Enable inputs, two active–LOW (E1

, E2) and one

active–HIGH (E3). All outputs will be HIGH unless E1

and E2 are LOW,
and E3 is HIGH. This multiple enabled function allows easy parallel
expansion of the device to a 1–of–32 (5 lines to 32 lines) decoder with just
four LVQ138 devices and one inverter (See Figure 1). The LVQ138 can
be used as an 8–output demultiplexer by using one of the active–LOW
Enable inputs as the data input and the other Enable inputs as strobes.
The Enable inputs which are not used must be permanently tied to their
appropriate active–HIGH or active–LOW state.

Current drive capability is 12mA at the outputs.

• Designed for 2.7 to 3.6V V

CC

Operation – Ideal for Low Power/Low

Noise Applications

• Guaranteed Simultaneous Switching Noise Level and Dynamic

Threshold Performance

• Guaranteed Skew Specifications

• Guaranteed Incident Wave Switching into 75Ω

• Low Static Supply Current (10µA) Substantially Reduces System Power

Requirements

• Latchup Performance Exceeds 500mA

• ESD Performance: Human Body Model >2000V

1516 14 13 12 11 10

21 3 4 5 6 7

V

CC

9

8

O0

O1 O2 O3 O4 O5 O6

A0 A1 A2 E1 E2 E3 O7 GND

Pinout: 16–Lead Plastic Package (Top View)

M SUFFIX

PLASTIC SOIC EIAJ

CASE 966–01

16

1



LOW–VOLTAGE CMOS

DECODER/DEMULTIPLEXER

D SUFFIX

PLASTIC SOIC
CASE 751B–05

DT SUFFIX

PLASTIC TSSOP

CASE 948F–01

16

1

16

1

PIN NAMES

Function

Address Inputs
Enable Inputs
Enable Input
Outputs

Pins

A0–A2
E1

–E2
E3
O0

–O7

SD SUFFIX

PLASTIC SSOP

CASE 940B–03

16

1

LVQ

MC74LVQ138

MOTOROLA LVQ DATA

BR1478

2

LOGIC DIAGRAM

O7 O6 O5 O4 O3 O2 O1 O0

A2 A1 A0 E1 E2 E3

654123

7 9 10 11 12 13 14 15

INPUTS OUTPUTS

E1 E2 E3 A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7

H
X
X

X

H

X

X
X
L

X
X
X

X
X
X

X
X
X

H
H
H

H
H
H

H
H
H

H
H
H

H
H
H

H
H
H

H
H
H

H
H
H

L
L
L
L

L
L
L
L

H
H
H
H

L
H
L
H

L
L
H
H

L
L
L
L

L
H
H
H

H

L
H
H

H
H

L

H

H
H
H

L

H
H
H
H

H
H
H
H

H
H
H
H

H
H
H
H

L
L
L
L

L
L
L
L

H
H
H
H

L
H
L
H

L
L
H
H

H
H
H
H

H
H
H
H

H
H
H
H

H
H
H
H

H
H
H
H

L
H
H
H

H
L
H
H

H
H

L

H

H
H
H

L

H = High Voltage Level; L = Low V oltage Level; X = High or Low V oltage Level and Transitions Are Acceptable; For ICC reasons, DO NOT FLOAT
Inputs

Figure 1. Expansion to 1–of–32 Decoding

O0

O0 O1 O2 O3 O4 O5 O6 O7

A0 A1 A2 E

O0 O1 O2 O3 O4 O5 O6 O7

A0 A1 A2 E

O0 O1 O2 O3 O4 O5 O6 O7

A0 A1 A2 E

O31

O0 O1 O2 O3 O4 O5 O6 O7

A0 A1 A2 E

H

A4

A3

A2

A1

A0

‘04

123 123 123 123

MC74LVQ138

LCX DATA
BR1478

3 MOTOROLA

ABSOLUTE MAXIMUM RATINGS*

Symbol Parameter Value Condition Unit

V

CC

DC Supply Voltage –0.5 to +7.0 V

V

I

DC Input Voltage –0.5 ≤ VI ≤ VCC + 0.5V V

V

O

DC Output Voltage –0.5 ≤ VO ≤ VCC + 0.5 Output in HIGH or LOW State V

I

IK

DC Input Diode Current –20 VI = –0.5V mA

+20 VI = VCC + 0.5V mA

I

OK

DC Output Diode Current –20 VO = –0.5V mA

+20 VI = VCC + 0.5V mA

I

O

DC Output Source/Sink Current ±50 mA

I

CC

DC Supply Current ±200 mA

I

GND

DC Ground Current ±200 mA

T

STG

Storage Temperature Range –65 to +150 °C

* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or

conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is
not implied.

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Min Typ Max Unit

V

CC

Supply Voltage 2.0 3.3 3.6 V

V

I

Input Voltage 0 V

CC

V

V

O

Output Voltage 0 V

CC

V

T

A

Operating Free–Air Temperature –40 +85 °C

∆V/∆t Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V, VCC = 3.0V 0 125 mV/ns

DC ELECTRICAL CHARACTERISTICS

TA = –40°C to +85°C

Symbol Characteristic Condition Min Max Unit

V

IH

HIGH Level Input Voltage (Note 1) 2.7V ≤ VCC ≤ 3.6V,

VO = 0.1V or VCC – 0.1V

2.0 V

V

IL

LOW Level Input Voltage (Note 1) 2.7V ≤ VCC ≤ 3.6V,

VO = 0.1V or VCC – 0.1V

0.8 V

V

OH

HIGH Level Output Voltage 2.7V ≤ VCC ≤ 3.6V; IOH = –50µA VCC– 0.1 V

VCC = 2.7V; IOH = –12mA 2.2
VCC = 3.0V; IOH = –12mA 2.48

V

OL

LOW Level Output Voltage 2.7V ≤ VCC ≤ 3.6V; IOL = 50µA 0.1 V

2.7V ≤ VCC ≤ 3.6V; IOL= 12mA 0.4

I

I

Input Leakage Current 2.7V ≤ VCC ≤3.6V; VI= VCC, GND ±1.0 µA

I

OLD

Minimum Dynamic Output Current (Note 2) VCC = 3.6V; V

OLD

= 0.8V Max 36 mA

I

OHD

VCC = 3.6V; V

OHD

= 2.0V Min –25 mA

I

CC

Quiescent Supply Current 2.7V ≤ VCC ≤3.6V; VI = VCC, GND 10 µA

1. These values of VI are used to test DC electrical characteristics only. Functional test should use VIH ≥ 2.4V, VIL ≤ 0.5V.

2. Incident wave switching on transmission lines with impedances as low as 75Ω for commercial temperature range is guaranteed. Maximum test
duration is 2ms, one output loaded at a time.