器件名称:
MC74HC390AF
功能描述:
Dual 4Stage Binary Ripple Counter with /2and /5 Sections HighPerformance SiliconGate CMOS
文件大小:
127.46KB 共10页
简 介:
MC74HC390A Dual 4Stage Binary Ripple Counter with ÷ 2 and ÷ 5 Sections HighPerformance SiliconGate CMOS http://onsemi.com The MC74HC390A 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 4bit counters, each composed of a dividebytwo and a dividebyfive section. The dividebytwo and dividebyfive counters have separate clock inputs, and can be cascaded to implement various combinations of ÷ 2 and/or ÷ 5 up to a ÷ 100 counter. Flipflops internal to the counters are triggered by hightolow transitions of the clock input. A separate, asynchronous reset is provided for each 4bit counter. State changes of the Q outputs do not occur simultaneously because of internal ripple delays. Therefore, decoded output signals are subject to decoding spikes and should not be used as clocks or strobes except when gated with the Clock of the HC390A. Features MARKING DIAGRAMS 16 16 1 PDIP16 N SUFFIX CASE 648 1 16 16 1 SOIC16 D SUFFIX CASE 751B 1 16 16 1 TSSOP16 DT SUFFIX CASE 948F 1 16 16 1 SOEIAJ16 F SUFFIX CASE 966 1 74HC390A ALYWG HC 390A ALYWG G HC390AG AWLYWW MC74HC390AN AWLYYWWG 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 mA High Noise Immunity Characteristic of CMOS Devices In Compliance with the Requirements Defined by JEDEC Stand……
