MC74LCX138 Datasheet, PDF (1/8 Pages) Motorola, Inc – Low-Voltage CMOS 1-of-8 Decoder/Demultiplexer With 5V-Tolerant Inputs

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage CMOS 1-of-8
Decoder/Demultiplexer
With 5V-Tolerant Inputs
MC74LCX138
The MC74LCX138 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. A VI specification of 5.5V allows MC74LCX138 inputs to be
safely driven from 5V devices. The MC74LCX138 is suitable for memory
address decoding and other TTL level bus oriented applications.
The MC74LCX138 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 LCX138
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 LCX138 devices and one inverter (See Figure 1). The LCX138 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 24mA at the outputs.
• Designed for 2.7 to 3.6V VCC Operation
• 5V Tolerant Inputs — Interface Capability With 5V TTL Logic
• LVTTL Compatible
• LVCMOS Compatible
• 24mA Balanced Output Sink and Source Capability
• Near Zero Static Supply Current (10µA) Substantially Reduces System
Power Requirements
• Latchup Performance Exceeds 500mA
• ESD Performance: Human Body Model >2000V; Machine Model >200V
LOW–VOLTAGE CMOS
DECODER/DEMULTIPLEXER
16
1
16
1
16
1
16
1
D SUFFIX
PLASTIC SOIC
CASE 751B–05
M SUFFIX
PLASTIC SOIC EIAJ
CASE 966–01
SD SUFFIX
PLASTIC SSOP
CASE 940B–03
DT SUFFIX
PLASTIC TSSOP
CASE 948F–01
Pinout: 16–Lead Plastic Package (Top View)
VCC O0 O1 O2 O3 O4 O5 O6
16 15 14 13 12 11 10 9
12345678
A0 A1 A2 E1 E2 E3 O7 GND
11/96
© Motorola, Inc. 1996
1
PIN NAMES
Pins
A0–A2
E1–E2
E3
O0–O7
Function
Address Inputs
Enable Inputs
Enable Input
Outputs
REV 1