MSM54C864 Datasheet | OKI Electric

DESCRIPTION The MSM54C864 is a 512Kbit CMOS multiport memory posed 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 patible - 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-xx ZS) 40-pin 400 mil plastic SOJ (SOJ40-P-400-1.27) (Product : MSM54C864-xx JS) xx indicates speed rank. PRODUCT FAMILY Family MSM54C864-70 MSM54C864-80 MSM54C864-10 Access Time RAM 70 ns 80 ns 100 ns SAM 25 ns 25 ns 25 ns Cycle Time RAM 140 ns 150 ns 180 ns SAM 30 ns 30 ns 30 ns Power Dissipation Operating 120 m A 110 m A 100 m A Standby 8 m A 8 m A 8 m A 1/33 .. ¡ Semiconductor PIN CONFIGURATION (TOP VIEW) W5/IO5 W7/IO7 SE SIO6 SIO8 1 3 5 7 9 2 4 6 8 W6/IO6 W8/IO8 SIO5 SIO7 SC 11 SIO2 13 SIO4 15 W1/IO1 17 W3/IO3 19 W4/IO4 21 WB/WE 23 NC 25 VSS2 27 A5 29 NC 31 A7 33 A2 35 A0 37 CAS 39 10 VSS1 12 SIO1 14 SIO3 16 DT/OE 18 W2/IO2 20 VSS3 22 VCC1 24 RAS 26 A6 28 NC 30 A4 32 VCC2 34 A3 36 A1 38 NC 40 NC SC 1 SIO1 2 SIO2 3 SIO3 4 SIO4 5 DT/OE 6 W1/IO1 7 W2/IO2 8...