MC74HC390A

双4级二进制纹波计数器与÷ 2 ÷和5节 Dual 4-Stage Binary Ripple Counter with ±2 and ±5 Sections

Dual 4−Stage Binary Ripple Counter with ÷2 and ÷5 Sections

High−Performance Silicon−Gate CMOS

The is identical in pinout to the LS390. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This device consists of two independent 4−bit counters, each

composed of a divide−by−two and a divide−by−five section. The divide−by−two and divide−by−five counters have separate clock inputs, and can be cascaded to implement various combinations of ÷2 and/or ÷5 up to a ÷100 counter.

Features

•Output Drive Capability: 10 LSTTL Loads

•Outputs Directly Interface to CMOS, NMOS, and TTL

•Operating Voltage Range: 2.0 to 6.0 V

•Low Input Current: 1 A

•High Noise Immunity Characteristic of CMOS Devices

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

•Chip Complexity: 244 FETs or 61 Equivalent Gates

•Pb−Free Packages are Available

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