HT74164

HT74164 8-Bit Serial-In/Parallel-Out Shift Register Features · Operating voltage: 2.0V~6.0V · A 8-bit, serial-input to parallel-output shift register · Gated serial data inputs · Asynchronous master reset · Output drive capability: 10 LSTTL Loads · Outputs Directly Interface to CMOS · High noise immunity characteristic of CMOS Devices. · 14-pin DIP/SOP package General Description The HT74164 is identical in pin-out to the LS164. The device inputs are compatible with standard CMOS outputs; with pull-up resistors, they are compatible with LSTTL outputs. The HT74164 is a 8-bit, serial input to parallel-output shift register. Two serial data inputs, A1 and A2, are provided so that one input may be used as a data enable. Data is entered on each rising edge of the clock. The active low asynchronous reset overrides the Clock and Serial Data inputs. Block Diagram V D D A 1 A 2 R E S E T C L O C K V S S Q A Q B Q C Q D Q E Q F Q G Q H Q A ~ Q H : P a r a lle l D a ta O u tp u ts Pin Assignment A 1 1 2 3 4 5 6 7 8 A 2 Q A Q B Q C Q D V S S 1 4 1 3 1 2 1 1 1 0 9 V D D Q H Q G Q F Q E R E S E T C L O C K H T 7 4 1 6 4 1 4 D IP -A /S O P -A Rev. 1.10 1 March 30, 2009 Free Datasheet http://www.Datasheet4U.com HT74164 Pin Description Pad No. Pad Name I/O Function Serial Data Inputs. Data at these inputs determine the data to be entered into the first stage of the shift register. For a high level to be entered into the shift register both A1 and A2 inputs must be high, thereby all...