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MC74AC299DWR2-MC74ACT299DWR2
8-Input Universal Shift/Storage Register with Common Parallel I/O Pins
MC74AC299, MC74ACT299
8-Input Universal Shift/
Storage Register with
Common Parallel I/O Pins
The MC74AC299/74ACT299 is an 8−bit universal shift/storage
register with 3−state outputs. Four modes of operation are possible:
hold (store), shift left, shift right and load data. The parallel load inputs
and flip−flop outputs are multiplexed to reduce the total number of
package pins. Additional outputs are provided for flip−flops Q0, Q7 to
allow easy serial cascading. A separate active LOW Master Reset is
used to reset the register. Common Parallel I/O for Reduced Pin Count Additional Serial Inputs and Outputs for Expansion Four Operating Modes: Shift Left, Shift Right, Load and Store 3−State Outputs for Bus−Oriented Applications Outputs Source/Sink 24 mA ′ACT299 Has TTL Compatible Inputs
Figure 1. Pinout: 20−Lead Packages Conductors(Top View)
VCC DS7 Q7 I/O7 I/O5 I/O3 I/O1 CP DS0 OE1 OE2 I/O6 I/O4 I/O2 I/O0 Q0 MR GND
PIN ASSIGNMENT
