8-Bit Bidirectional Universal Shift Register with Parallel I/O High–Performance Silicon–Gate CMOS

The MC74HC299 is identical in pinout to the LS299. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.

The HC299 features a multiplexed parallel input/output data port to achieve full 8–bit handling in a 20 pin package. Due to the large output drive capability and the 3–state feature, this device is ideally suited for interface with bus lines in a bus–oriented system.

• Output Drive Capability: 15 LSTTL Loads for QA through QH

10 LSTTL Loads for QA′ and QH′

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 2 to 6 V

• Low Input Current: 1 µA

• High Noise Immunity Characteristic of CMOS Devices

• In Compliance with the Requirements Defined by JEDEC Standard No. 7A

• Chip Complexity: 398 FETs or 99.5 Equivalent Gates