E2L0043-17-Y1
¡ Semiconductor
MSM548128BL
¡ Semiconductor
131,072-Word
¥
8-Bit High-Speed PSRAM
This version: Jan. 1998
MSM548128BL
Previous version: Dec. 1996
DESCRIPTION
The MSM548128BL is a 1-Mbit, high-speed and low power CMOS Pseudo Static RAM organized
as 131,072-word
¥
8-bit.
The MSM548128BL is fabricated using silicon gate N well CMOS process. This process, coupled
with single-transistor memory storage cells, permits maximum circuit density, minimum chip
size, and high speed.
MSM548128BL has Self-refresh mode in addition to Address-refresh mode and Auto-refresh
mode. In Self-refresh mode the internal refresh timer and address counter refresh the dynamic
memory cells automatically. This series allows low power consumption when using standby
mode with Self-refresh.
The MSM548128BL also features a static RAM-like write function that writes the data into the
memory cell at the rising edge of
WE.
The MSM548128BL is pin compatible with CMOS static RAM and 256K pseudo static RAM.
FEATURES
• Large capacity
• Fast access time
• Low power
• Refresh free
• Pin compatible
• Logic compatible
• Single power supply
• Refresh
• Package compatible
• Package options:
32-pin 600 mil plastic DIP
32-pin 525 mil plastic SOP
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1-Mbit (131,072-word
¥
8 bits)
70 ns max.
200
µA
max. (standby with Self-refresh)
Self refresh
SRAM, 256K PSRAM
SRAM
WE
pin, no address multiplex
5 V
±10%
512 cycle/8 ms auto-address refresh
SRAM standard package
(DIP32-P-600-2.54)
(Product : MSM548128BL-xxRS)
(SOP32-P-525-1.27-K) (Product : MSM548128BL-xxGS-K)
xx indicates speed rank.
PRODUCT FAMILY
Family
MSM548128BL-70RS
MSM548128BL-80RS
MSM548128BL-70GS-K
MSM548128BL-80GS-K
Access Time (Max.)
70 ns
80 ns
70 ns
80 ns
Package
600 mil 32-pin
Plastic DIP
525 mil 32-pin
Plastic SOP
1/12
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