MSM54V16272 Datasheet, PDF (1/39 Pages) OKI electronic componets – 262,144-Word x 16-Bit Multiport DRAM

E2L0024-17-Y1
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MSM54V16272
262,144-Word ¥ 16-Bit Multiport DRAM
This vers_Mion_S:_MJ₅a₄n_V. 1₁9₆9₂8₇₂
Previous version: Dec. 1996
DESCRIPTION
The MSM54V16272 is a 4-Mbit CMOS multiport DRAM composed of a 262,144-word by 16-bit
dynamic RAM, and a 512-word by 16-bit SAM. Its RAM and SAM operate independently and
asynchronously.
It supports three types of operations: random access to RAM port, high speed serial access to
SAM port, and bidirectional transfer of data between any selected row in the RAM port and the
SAM port. In addition to the conventional multiport DRAM operating modes, the MSM54V16272
features block write and flash write functions on the RAM port, and a split data transfer
capability on the SAM port. The SAM port requires no refresh operation because it uses static
CMOS flip-flops.
FEATURES
• Single power supply: 3.3 V ±0.3 V
• RAS only refresh
• Full TTL compatibility
• CAS before RAS refresh
• Multiport organization
• CAS before RAS self-refresh
RAM : 256K word ¥ 16 bits
• Hidden refresh
SAM : 512 word ¥ 16 bits
• Serial read/write
• Fast page mode
• 512 tap location
• Write per bit
• Bidirectional data transfer
• Byte read/write
• Split transfer
• Masked flash write
• Masked write transfer
• Masked block write (8 columns)
• Refresh: 512 cycles/8 ms
• Package options:
64-pin 525 mil plastic SSOP (SSOP64-P-525-0.80-K) (Product : MSM54V16272-xxGS-K)
70/64-pin 400 mil plastic TSOP (Type II)(TSOPII70/64-P-400-0.65-K)(Product : MSM54V16272-xxTS-K)
xx indicates speed rank.
PRODUCT FAMILY
Family
MSM54V16272-60
MSM54V16272-70
Access Time
RAM SAM
60 ns 18 ns
70 ns 20 ns
Cycle Time
RAM SAM
120 ns 22 ns
140 ns 22 ns
Power Dissipation
Operating
Standby
160 mA
8 mA
150 mA
8 mA
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