MSM5416282 Datasheet, PDF (1/37 Pages) OKI electronic componets – 262,144-Word x 16-Bit Multiport DRAM

E2L0022-17-Y1
¡ _¡ Semicond_Suc_etor_miconductor
MSM5416282
262,144-Word ¥ 16-Bit Multiport DRAM
PreviTouhissvveerrssiioon^Mn::SD^MJaen5c..^{411199699286P8r2eliminary}
DESCRIPTION
The MSM5416282 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 MSM5416282
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: 5 V ±10%
• RAS only refresh
• Full TTL compatibility
• CAS before RAS refresh
• Multiport organization
• Hidden refresh
RAM : 256K word ¥ 16 bits
• Serial read/write
SAM : 512 word ¥ 16 bits
• 512 tap location
• Fast page mode
• Bidirectional data transfer
• Write per bit
• Split transfer
• Byte write
• Masked write transfer
• Masked flash write
• Refresh: 512 cycles/8 ms
• Masked block write (8 columns)
• Package:
64-pin 525 mil plastic SSOP (SSOP64-P-525-0.80-K) (Product : MSM5416282-xxGS-K)
xx indicates speed rank.
PRODUCT FAMILY
Family
MSM5416282-50
MSM5416282-60
MSM5416282-70
Access Time
RAM SAM
50 ns 17 ns
60 ns 18 ns
70 ns 20 ns
Cycle Time
RAM SAM
110 ns 20 ns
120 ns 22 ns
140 ns 22 ns
Power Dissipation
Operating
Standby
180 mA
8 mA
170 mA
8 mA
160 mA
8 mA
1/37