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MSM54C864-10 Datasheet(PDF) 1 Page - OKI electronic componets |
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MSM54C864-10 Datasheet(HTML) 1 Page - OKI electronic componets |
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1 / 33 page  ¡ Semiconductor MSM54C864 1/33 ¡ Semiconductor MSM54C864 65,536-Word ¥ 8-Bit Multiport DRAM DESCRIPTION The MSM54C864 is a 512Kbit CMOS multiport memory composed of a 65,536-word by 8-bit dynamic random access memory, RAM port, and a 256-word by 8-bit static serial access memory, SAM port. The RAM port and SAM port operate independently and asynchronously. The MSM54C864 supports three types of operation : 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 • Single power supply of 5 V ±10% with a built-in VBB generator • All inputs and outputs: TTL compatible • Multiport organization RAM port: 64K word ¥ 8 bits SAM port: 256 word ¥ 8 bits • RAM port Fast page mode, Read-modify-write CAS before RAS refresh, Hidden refresh RAS only refresh, Standard write-per-bit • SAM port High speed serial Read / Write capability Fully static register 256 tap location • RAM-SAM bidirectional, Read / Write / Pseudo write, Real time read transfer • Refresh : 256 cycles/4 ms • Package options: 40-pin 475 mil plastic ZIP (ZIP40-P-475-1.27) (Product : MSM54C864-xxZS) 40-pin 400 mil plastic SOJ (SOJ40-P-400-1.27) (Product : MSM54C864-xxJS) xx indicates speed rank. PRODUCT FAMILY MSM54C864-70 MSM54C864-80 MSM54C864-10 Access Time RAM SAM 70 ns 25 ns 80 ns 25 ns 100 ns 25 ns Cycle Time RAM SAM 140 ns 30 ns 150 ns 30 ns 180 ns 30 ns Power Dissipation Operating 120 mA 110 mA 100 mA Standby 8 mA 8 mA 8 mA Family E2L0010-17-Y1 This version: Jan. 1998 Previous version: Dec. 1996 |
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