8-Bit Serial-Input Shift Register With Latched
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
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
TA = -55° to 125° C for all packages
PIN 16 =VCC
PIN 8 = GND
Clock Output Strobe A QA QN SQH SQH’
L X X Z Z Q6 NC
L X X Z Z NC SQH
H L X NC NC Q6 NC
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