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SL74HC4094D

8-Bit Serial-Input Shift Register With Latched 3-State Outputs High-Performance Silicon-Gate CMOS

System Logic Semiconductor 

SL74HC4094

8-Bit Serial-Input Shift Register With Latched

3-State Outputs

High-Performance Silicon-Gate CMOS

The SL74HC4094 is identical in pinout to the LS/ALS4094. The

device inputs are compatible with standard CMOS outputs; with pullup

resistors, they are compatible with LS/ALSTTL outputs.

This device consists of an 8-bit shift register and 8-bit D-type latch

with three-state parallel outputs. Data is shifted serially through the

shift register on the positive going transition of the clock input signal.

The output of the last stage SQH can be used to cascade several

devices.

Data on the SQH output is transferred to a second output (SQH’) on

the following negative transition of the clock input signal. The data of

each stage of the shift register is provided with a latch, which latches

data on the negative going transition of the Strobe input signal. When

the Strobe input is held high, data propagates through the latch to a 3-

state output buffer.

This buffer is enabled when Output Enable input is taken high.

• 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

ORDERING INFORMATION

SL74HC4094N Plastic

SL74HC4094D SOIC

TA = -55° to 125° C for all packages

PIN ASSIGNMENT

LOGIC DIAGRAM

PIN 16 =VCC

PIN 8 = GND

SLS

System Logic

Semiconductor

FUNCTION TABLE

Inputs

Parallel Serial

Outputs Outputs

Clock Output Strobe A QA QN SQH SQH’

Enable

L

X X Z Z Q6 NC

L

X X Z Z NC SQH

H

L X NC NC Q6 NC

H

H

H

H

H

X

NC = No Change

Z = high impedance

X = don’t care

L L QN-1 Q6 NC

H H QN-1 Q6 NC

X NC NC NC SQH

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