參數(shù)資料
型號(hào)： MMK2-67025EV-30
廠商： TEMIC SEMICONDUCTORS
元件分類： Static RAM
英文描述： 8K X 16 DUAL-PORT SRAM, 30 ns, QFP84
封裝： MQFP-84
文件頁(yè)數(shù)： 1/23頁(yè)
文件大?。?/td> 355K
代理商： MMK2-67025EV-30
M67025E
Rev. G – July 6, 2000
1
3
Introduction
The M67025E is a very low power CMOS dual port static
RAM organised as 8192
× 16. The M67025E 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 TEMIC MASTER/SLAVE dual
port approach in memory system applications results in
full speed, error free operation without the need of an
additional discrete logic.
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.
Using an array of eight transistors (8T) memory cell, the
M67025E combines an extremely low standby supply
current (typ = 1.0
A) with a fast access time at 30 ns
over the full temperature range. All versions offer battery
backup data retention capability with a typical power
consumption at less than 5
W.
The M67025E is processed according to the methods of
the latest revision of the MIL STD 883 (class B or S), ESA
SCC 9000 or QML.
Features
D Fast access time : 30, 45 ns
D Wide temperature range :
–55
°C to +125 °C
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 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
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
D Single 5 V ± 10 % power supply
8 K
16 CMOS Dual Port RAM Rad Tolerant
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