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MSM514252A-10ZS Datasheet

  • MSM514252A-10ZS

  • 262,144-Word x 4-Bit Multiport DRAM

  • 33頁

  • OKI

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E2L0012-17-Y1
隆 Semiconductor
隆 Semiconductor
MSM514252A
262,144-Word
樓
4-Bit Multiport DRAM
This version: Jan. 1998
MSM514252A
Previous version: Dec. 1996
DESCRIPTION
The MSM514252A is an 1-Mbit CMOS multiport DRAM composed of a 262,144-word by 4-bit
dynamic RAM, and a 512-word by 4-bit static serial access memory, SAM port. The RAM port
and SAM port operate independently and asynchronously.
The MSM514252A supports three types of operations: random access to and from the RAM port,
high speed serial access to and from the SAM port and bidirectional transfer of data between any
selected row in the RAM port and the SAM port. The RAM port and the SAM port can be accessed
independently except when data is being transferred between them internally.
FEATURES
鈥?Single power supply of 5 V
鹵10%
with a built-in V
BB
generator
鈥?All inputs and outputs: TTL compatible
鈥?Multiport organization
RAM port: 256K word
樓
4 bits
SAM port: 512 word
樓
4 bits
鈥?RAM port
Fast page mode, Read-modify-write
CAS
before
RAS
refresh, Hidden refresh
RAS
only refresh, Standard write-per-bit
鈥?SAM port
High speed serial
Read/Write capability
Fully static register
512 tap location
鈥?RAM-SAM bidirectional, Read/Write/Pseudo write, Real time read transfer
鈥?Package options:
28-pin 400 mil plastic ZIP
(ZIP28-P-400-1.27)
(Product : MSM514252A-xxZS)
28-pin 400 mil plastic SOJ
(SOJ28-P-400-1.27)
(Product : MSM514252A-xxJS)
xx indicates speed rank.
PRODUCT FAMILY
Family
MSM514252A-70
MSM514252A-80
MSM514252A-10
Access Time
RAM
70 ns
80 ns
100 ns
SAM
25 ns
25 ns
25 ns
Cycle Time
RAM
140 ns
150 ns
180 ns
SAM
30 ns
30 ns
30 ns
Power Dissipation
Operating
120 mA
110 mA
100 mA
Standby
8 mA
8 mA
8 mA
1/33

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