74190 Decade Counter BCD (0 to 9)

74LS190 TTL 74LS190 integrated circuit, up/down synchronous BCD counter with control mode. The state changes of the counters are synchronous with the transition from low to high of the clock pulse input. An asynchronous parallel load input (PL) cancels the count and loads the data present in the PN inputs on the flip-flops, which makes it possible to use circuits as programmable counters. A Count Enablement (CE) entry serves as a haul/loan entry in multi-stage counters. An up/down count control input (U/D) determines whether a circuit counts up or down. A Terminal Count (TC) output and a Ripple Clock (RC) output provide overflow/subflow indication and make possible a variety of methods for generating transport/loan signals in multi-stage counter applications.

90 mW Typical dissipation

high speed. . . Typical 25 MHz counting frequency

Synchronous Count

Asynchronous parallel load

Individual preset entries

Count Enable and Up/down Control inputs

in cascade

Input Clamp Diodes

High speed termination effects limit

Specs

• Family: LS
• Logic Circuit Type: Up/down Synchronous BCD Counter
• Accountant BCD 8-4-2-1
• Output: Parallel
• Minimum supply voltage: 4.25 V
• Maximum supply voltage: 5.25 V
• Minimum operating temperature: 0°C
• Maximum operating temperature: 70°C
• Encapsulated: Dip
• 16 pins
• Substitute
• NTE74LS190