DESCRIPTION:

Maxwell Technologies’ 7025E Dual Port RAM High Speed CMOS? microcircuit features a greater than 100 krad (Si) total dose tolerance, depending upon space mission. The 7025E is designed to be used as a stand-alone 128k-bit Dual Port RAM or as a combination MASTER/SLAVE Dual-Port RAM for 32-bit or more word systems. This design results in full-speed, error-free operation without the need for additional discrete logic. The 7025E provides two independent ports with separate control, address, and I/O pins that permit independent, asynchronous access for reads or writes to any location in memory. An automatic power down feature controlled by CS permits the on-chip circuitry of each port to enter a very low standby power mode.

FEATURES:

? 8K x 16-bit dual port RAM

- Stand Alone

- Master Slave

? RAD-PAK? radiation-hardened against natural space radiation

? Total dose hardness:

- > 100 krad (Si), depending upon space mission

? Excellent Single Event Effects:

-SELTH LET = >100 MeV/mg/cm2

-SEUTH LET = 7 MeV/mg/cm2

? Package:

-84 Pin RAD-PAK? quad flat pack

? Separate upper byte and lower byte control for multiplexed bus compatibility

? High speed access time: 35/45 ns

? Expandable to 32 bits or more using master/slave select when cascading

? High speed CMOS technology

-TTL compatible, single 5V power supply

-Interrupt flag for port-to-port communication

-On chip port arbitration logic

-Asynchronous operation from either port