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MSM5416273 Datasheet(PDF) 1 Page - OKI electronic componets |
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MSM5416273 Datasheet(HTML) 1 Page - OKI electronic componets |
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1 / 40 page  ¡ Semiconductor MSM5416273 1/40 ¡ 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 RAM : 256K word ¥ 16 bits SAM : 512 word ¥ 16 bits • Extended page mode • Write per bit • Persistent write per bit • Byte read/write • Masked flash write • Masked block write (8 columns) • Package: 64-pin 525 mil plastic SSOP (SSOP64-P-525-0.80-K) (Product : MSM5416273-xxGS-K) xx indicates speed rank. PRODUCT FAMILY • 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 Access Time Cycle Time Power Dissipation RAM RAM Operating Standby SAM SAM 50 ns 110 ns 180 mA 8 mA 17 ns 20 ns 60 ns 120 ns 170 mA 8 mA 18 ns 22 ns 70 ns 140 ns 160 mA 8 mA 20 ns 22 ns Family MSM5416273-50 MSM5416273-60 MSM5416273-70 E2L0021-17-Y1 This version: Jan. 1998 Previous version: Dec. 1996 |
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