74LS190 Datasheet PDF – Synchronous 4-Bit Binary Counter

Part Number: 74LS190

Function: Synchronous 4-Bit Binary Counters

Package: DIP 16 Pin

Manufacturer: Motorola => Freescale


74LS190 datasheet



The SN54LS190, 74LS190 is a synchronous UP/DOWN BCD Decade (8421) Counter and the SN54LS191, 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.



• 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

74LS190 Datasheet PDF Download

74LS190 pdf

Other data sheets are available within the file: 54LS190J, 54LS191J, 74LS190, 74LS190D, 74LS190N