Binary Synchronous Up / Down Counter, 48 MHz, 2 V to 6 V, DIP-16
Product Overview
The SN74HC191N 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
Product Information
Logic Family / Base Number: 74HC191
Counter Type: Binary, Synchronous, Up / Down
Clock Frequency: 48MHz
Count Maximum: 16
Logic Case Style: DIP
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
Product Range: -
MSL: -
What's in the box
1 x Texas Instruments (SN74HC191N) Counter
