MSM54C864

E2L0010-17-Y1 www.DataSheet4U.com ¡ Semiconductor ¡ Semiconductor MSM54C864 65,536-Word ¥ 8-Bit Multiport DRAM This version: Jan. 1998 MSM54C864 Previous version: Dec. 1996 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 sp...