MATRA MHS
M 67025
8 K × 16 CMOS Dual Port RAM
Introduction
The M 67025 is a very low power CMOS dual port static Using an array of eigh transistors (8T) memory cell and
RAM organised as 8192 × 16. The M 67025 is designed fabricated with the state of the art 0.65 µ lithography
to be used as a stand-alone 16 bit dual port RAM or as a named SCMOS, the M 67025 combines an extremely low
combination MASTER/SLAVE dual port for 32 bit or standby supply current (typ = 1.0 µA) with a fast access
more
width
systems.
The
MATRA-MHS time at 20 ns over the full temperature range. All versions
MASTER/SLAVE dual port approach in memory system offer battery backup data retention capability with a
applications results in full speed, error free operation typical power consumption at less than 5 µW.
without the need of an additional discrete logic.
For military/space applications that demand superior
Master and slave devices provide two independant ports
with separate control, address and I/O pins that permit
independant, 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.
levels of performance and reliability the M 67025 is
processed according to the methods of the latest revision
of the MIL STD 883 (class B or S) and/or ESA SCC 9000.
Features
D Fast access time : 20/25/30/35/45/55 ns
D Wide temperature range :
D 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
–55 °C to +125 °C
D 67025 L low power
D INT flag for port to port communication
D Full hardware support of semaphore signaling between ports
D Fully asynchronous operation from either port
D Battery back-up operation : 2 V data retention
D TTL compatible
67025 V very low power
D Separate upper byte and lower byte control for multiplexed
bus compatibility
D Expandable data bus to 32 bits or more using master/slave
chip select when using more than one device
D On chip arbitration logic
D Single 5 V ± 10 % power supply
D For 3.3 V version, please consult sales
Rev. D (29/09/95)
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