74190 Synchronous UP/DOWN BCD Decade Counter

The SN54/74LS190 is a synchronous UP/DOWN BCD Decade (8421) Counter and the SN54/74LS191  is a synchronous UP /DOWN Modulo-16 Binary Counter.

State changes of the counters are synchronous with the LOW-to-HIGH transition of the Clock Pulse input. An asynchronous Parallel Load (PL) input overrides counting and loads the data present on the Pn inputs into the flip-flops, which makes it possible to use the circuits as programmable counters.

A Count Enable (CE) input serves as the carry /borrow input in multi-stage counters. An Up /Down Count Control (U/D) input determines whether a circuit counts up or down. A Terminal Count (TC) output and a Ripple Clock (RC) output provide overflow/underflow indication and make possible a variety of methods for generating carry/borrow signals in multistage counter applications.

We have Various sizes of 7400 Series IC. Check out our complete collection of 7400 Series IC.

Features of 74190

• Low Power 90 mW Typical Dissipation

• High Speed 25 MHz Typical Count Frequency

• Synchronous Counting

• Asynchronous Parallel Load

• Individual Preset Inputs

• Count Enable and Up/Down Control Inputs

• Cascadable

• Input Clamp Diodes Limit High Speed Termination Effects