M74HC164 Datasheet PDF | STMicroelectronics

STMicroelectronics M74HC164

The M74HC164 is an high speed CMOS 8 BIT b SIPO SHIFT REGISTER fabricated with silicon O gate C2MOS technology. Each low-to-high DIP SOP TSSOP ORDER CODES PACKAGE TUBE DIP SOP TSSOP M74HC164B1R M74HC164M1R T&R M74HC164RM13TR M74HC164TTR transition on the clock inputs shifts data one place to the right and enters into QA the logic NAND of the two data inputs (A x B), the data that existed before the rising clock edge. - The M74HC164 is an 8 bit shift register with serial t(s) data entry and an output from each of the eight stages.

Part No.	M74HC164
Datasheet	M74HC164 Download
Manufacturer	STMicroelectronics
Description	8 BIT SIPO SHIFT REGISTER
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DESCRIPTION

s Data is entered serially through one of two c inputs (A or B), either of these inputs can be used u as an active high enable for data entry through the d other input. An unused input must be high, or both ro inputs connected together. A low level on the clear input overrides all other inputs and clears the register asynchronously, forcing all Q outputs low. All inputs are equipped with protection circuits against static discharge and transient excess voltage. Obsolete P PIN CONNECTION AND IEC LOGIC SYMBOLS June 2003 1/13 M74HC164 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN

DESCRIPTION

PIN No 1,2 3, 4, 5, 6, 10, 11, 12, 13 8 9 7 14 SYMBOL A, B QA to QH CLOCK CLEAR GND Vcc NAME AND FUNCTION Data Inputs Outputs Clock Input (LOW to HIGH, Edge Triggered Master Reset Input Ground (0V) Positive Supply Voltage t(s) TRUTH TABLE c INPUTS OUTPUTS rodu CLEAR CLOCK SERIAL IN A B QA QB ........... P L X X X L L ........... lete H X X NO CHANGE o H L X L QAn ........... bs H X L L QAn ...........