The SN54ALS191A is a synchronous 4-bit up/down binary counter designed for reliable counting operations in digital circuits. It features simultaneous clocking of all flip-flops, which eliminates output counting spikes typically associated with asynchronous counters. The counter can be configured to count up or down based on the state of the down/up (D/U) input, and counting can be enabled or disabled using the count enable (CTEN) input. This device supports asynchronous presetting of its outputs, allowing for flexible operation as a modulo-N divider. It includes cascading capabilities through its ripple clock output (RCO) and maximum/minimum count output, facilitating high-speed operations when multiple counters are used together. The SN54ALS191A is characterized for operation over a military temperature range of -55¬8C to 125¬8C, making it suitable for demanding applications. The product is available in various package options, including a 16-pin CFP package.
Synchronous 4-Bit Up/Down Binary Counter 16-CFP -55 to 125
| Texas Instruments | |
|---|---|
| Product Category | Logic Counters |
| Product Number | 5962-8684001FA |
| Product Name | SN54ALS191A Synchronous 4-Bit Up/Down Binary Counter |
| Counter Category | Synchronous |
| Counter Direction | Bidirectional |
| Supply Voltage | 5.5 |
| Package Type | CDIP,CFP,LCCC |
| Logic Family | ALS |
