Atmel M67025E
The M67025E is a very low power CMOS dual port static RAM organized as 8192 bit × 16. The product is designed to be used as a stand-alone 16-bit dual port RAM or as a combination MASTER/SLAVE dual port for 32-bit or more width systems. The Atmel MASTER/SLAVE dual port approach in memory system applications results in full speed, error free operation without the need of an additional discrete logic.FEATURES
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● Fast Access Time: 30/45 ns Wide Temperature Range: -55 °C to +125°C Separate Upper Byte and Lower Byte Control for Multiplexed Bus Compatibility Expandable Data Bus to 32 bits or More Using Master/Slave Chip Select When Using More Than One Device On-chip Arbitration Logic Versatile Pin Select for Master or Slave: – M/S = H for Busy Output Flag On Master – M/S = L for Busy Input Flag On Slave INT Flag for Port to Port Communication Full Hardware Support of Semaphore Signaling Between Ports Fully Asynchronous Operation From Either Port Battery Back-up Operation: 2V Data Retention TTL Compatible Single 5V + 10% Power Supply QML Q and V with SMD 5962-91617 Rad. Tolerant High Speed 8 Kb x 16 Dual Port RAM M67025E Introduction Master and slave devices provide two independent ports with separate control, address and I/O pins that permit independent, asynchronous access for reads and writes to any location in the memory. An automatic power down feature controlled by CS permits the on-chip circuitry of each port in order to enter a very low stand by power mode.