概览
描述
The 70121 is a high-speed 2K x 9 Dual-Port Static RAM designed to be used as a stand-alone 9-bit Dual- Port RAM or as a "MASTER" Dual-Port RAM together with the 70125 "SLAVE" Dual-Port in 18-bit-or-more word width systems. Using the IDT MASTER/SLAVE Dual-Port RAM approach in 18-bit-or-wider memory system applications results 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.
特性
- Fully asynchronous operation from either port
- MASTER 70121 easily expands data bus width to 18 bits or more using SLAVE 70125 chip
- On-chip port arbitration logic (70121 only)
- BUSY output flag on Master
- BUSY input on Slave
- INT flag for port-to-port communication
- Battery backup operation—2V data retention
- TTL-compatible, signal 5V (±10%) power supply
- Available in 52-pin PLCC
- Industrial temperature range (–40C to +85C) is available for selected speeds
- Green parts available, see ordering information
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应用
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