IN74HC165A

TECHNICAL DATA 8-Bit Serial or Parallel-Input/ Serial-Output Shift Register High-Performance Silicon-Gate CMOS The IN74HC165A is identical in pinout to the LS/ALS165. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALSTTL outputs. This device is an 8-bit shift register with complementary outputs from the last stage. Data may be loaded into the register either in parallel or in serial form. When the Serial Shift/ Parallel Load input is low, the data is loaded asynchronously in parallel. When the Serial Shift/Parallel Load input is high, the data is loaded serially on the rising edge of either Clock or Clock Inhibit (see the Function Table). The 2-input NOR clock may be used either by combining two independent clock sources or by designating one of the clock inputs to act as a clock inhibit. 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 IN74HC165A ORDERING INFORMATION IN74HC165AN Plastic IN74HC165AD SOIC TA = -55° to 125° C for all packages LOGIC DIAGRAM PIN ASSIGNMENT PIN 16=VCC PIN 8 = GND FUNCTION TABLE Inputs Serial Shift/ Parallel Load L H H H H H H L L Clock H Clock Inhibit X L S A Internal Stages A-H a...h X X X X X X no change QA a L H L H QB-QG b-g QAn-QFn QAn-QFn QAn-QFn QAn-QFn no change Output QH h QGn QGn QGn QGn Operation X L H L H X X Asynchronous Parallel Load Se...