256K x 16 DRAM
Documents
Description
The MSM54V16273
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 MSM54V16273 features block write, flash
write functions, extended page mode on the RAM port, a split data transfer
capability, and programmable stops on the SAM port. The SAM port requires no
refresh operation because it uses static CMOS flip-flops.
Features
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Single power supply: 3.3 V ±0.3 V |
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Full TTL compatibility |
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Multiport organization:
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RAM: 256K word x 16 bits |
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SAM: 512 word x 16 bits | |
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Extended page mode |
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Write per bit |
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Persistent write per bit |
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Byte read / write |
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Masked flash write |
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Masked block write (8 columns) |
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*RAS only refresh |
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*CAS before *RAS refresh |
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*CAS before *RAS self-refresh |
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Hidden refresh |
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Serial read / write |
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512 tap location |
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Programmable stops |
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Bidirectional data transfer |
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Split transfer |
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Masked write transfer |
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Refresh: 512 cycles / 8ms |
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Package:
64-pin 525 mil plastic SSOP
(SSOP64-P-525-0.80-K)
(Product: MSM54V16273-xxGS-K)
70 / 64-pin 400 mil
plastic TSOP (Type II)(TSOPII70/64-P-400-0.65-K)
(Product :
MSM54V16273-xxTS-K)
xx indicates speed rank.
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