RCA CD74HC191E Presettable Synchronous Binary Up/Down Counter OT0074

Description

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Product Overview

The CD74HC191E is a 4-bit synchronous Up/Down Binary Counter operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when instructed by the steering logic. This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple-clock) counters. The outputs of the four flip-flops are triggered on a low- to high-level transition of the clock input if the count-enable (CTEN) input is low. A high at CTEN inhibits counting. The direction of the count is determined by the level of the down/up (D/U) input. When D/U is low, the counter counts up and when D/U is high, it counts down. It features a fully independent clock circuit. Change at the control (CTEN and D/U) inputs that modifies the operating mode has no effect on the contents of the counter until clocking occurs. The function of the counter is dictated solely by the condition meeting the stable setup and hold times.

• Outputs can drive up to 10 LSTTL loads
• 13ns Typical tpd
• Low input current of 1µA Maximum
• Single down/up count-control line
• Look-ahead circuitry enhances speed of cascaded counters
• Fully synchronous in count modes
• Asynchronously presettable with load control
• 80µA Maximum low power consumption
• ±4mA Output drive at 5V
• Green product and no Sb/Br

Product Information

Logic Family / Base Number: 74HC191

Counter Type: Binary, Synchronous, Up / Down

Clock Frequency: 48MHz

Count Maximum: 16

Logic Case Style: SOIC

No. of Pins: 16Pins

Supply Voltage Min: 2V

Supply Voltage Max: 6V

Logic IC Family: 74HC

Logic IC Base Number: 74191

Operating Temperature Min: -40°C

Operating Temperature Max: 85°C

These genuine and original RCA parts are now obsolete.

For generic datasheet search…74HC191

Or go directly to…

https://www.ti.com/lit/ds/symlink/cd74hc190.pdf?ts=1723735881679&ref_url=https%253A%252F%252Fwww.mouser.co.uk%252F

PLEASE NOTE!

These parts came to us as part of a lot of surplus stock from a large distribution Co. and have been kept in storage for a time, they are however pristine, stored with us still in their original packaging, the photographs are representative of their excellent condition, being of one of our actual stock, and, as with all our products they come with a full guarantee.