特性
- True Dual-Ported memory cells which allow simultaneous access of the same memory location
- Two INT flags for port-to-port communications
- BUSY input
- Fully asynchronous operation from either port
- Battery backup operation – 2V data retention (LA only)
- TTL-compatible, single 5V ±10% power supply
- Available in 52-Pin PLCC, 64-Pin TQFP and STQFP packages
- Industrial temperature range (–40C to +85C) is available
描述
The 71421 is a high-speed 2K x 8 Dual-Port Static RAM with internal interrupt logic for interprocessor communications. It is designed to be used as a "SLAVE" Dual-Port RAM together with the 71321 "MASTER" Dual-Port in 16-bit-or-more word width systems which would result in full-speed, error free operation without the need for additional discrete logic. An automatic power down feature, controlled by CE, permits the on chip circuitry of each port to enter a very low standby power mode.
产品参数
| 属性 | 值 |
|---|---|
| Core Voltage (V) | 5 |
| Bus Width (bits) | 8 |
| Density (Kb) | 16 |
| Pkg. Code | PNG64 |
| Interface | Async |
| I/O Type | 5.0 V TTL |
| Access Time (ns) | 20, 25 |
| Temp. Range (°C) | -40 to 85°C, 0 to 70°C |
| Architecture | Dual-Port |
| Organization | 2K x 8 |
| Function | Busy, Interrupt, Slave |
封装选项
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TQFP | 14.0 x 14.0 x 1.4 | 64 | 0.8 |