Part Number: 74LS190
Function: Synchronous 4-Bit Binary Counters
Package: DIP 16 Pin
Manufacturer: Motorola => Freescale
Pinouts:
Description
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.
Image:
Features
• 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
Other data sheets are available within the file: 54LS190J, 54LS191J, 74LS190, 74LS190D, 74LS190N