msm5416273 Oki Semiconductor, msm5416273 Datasheet
msm5416273
Manufacturer Part Number
msm5416273
Description
262,144-word 16-bit Multiport Dram
Manufacturer
Oki Semiconductor
Datasheet
1.MSM5416273.pdf
(41 pages)
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FEDS5416273-05
¡ Semiconductor
MSM5416273
262,144-Word ¥ 16-Bit Multiport DRAM
DESCRIPTION
The MSM5416273 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 MSM5416273
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
• Single power supply: 5 V 10%
• Full TTL compatibility
• Multiport organization
• Extended page mode
• Write per bit
• Persistent write per bit
• Byte read/write
• Masked flash write
• Masked block write (8 columns)
• Package:
PRODUCT FAMILY
MSM5416273-50
MSM5416273-60
MSM5416273-70
RAM : 256K word ¥ 16 bits
SAM : 512 word ¥ 16 bits
64-pin 525 mil plastic SSOP
Family
RAM
50 ns
60 ns
70 ns
Access Time
(SSOP64-P-525-0.80-K)
SAM
17 ns
18 ns
20 ns
• RAS only refresh
• CAS before RAS refresh
• Hidden refresh
• Serial read/write
• 512 tap location
• Programmable stops
• Bidirectional data transfer
• Split transfer
• Masked write transfer
• Refresh: 512 cycles/8 ms
110 ns
120 ns
140 ns
RAM
Cycle Time
SAM
20 ns
22 ns
22 ns
(Product : MSM5416273-xxGS-K)
xx indicates speed rank.
Previous version: Jan. 1998
Operating
180 mA
170 mA
160 mA
This version: Feb. 2000
Power Dissipation
Standby
8 mA
8 mA
8 mA
1/41
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