MSM514252A

E2L0012-17-Y1 ¡ Semiconductor ¡ Semiconductor MSM514252A 262,144-Word ¥ 4-Bit Multiport DRAM This version: Jan. 1998 MSM514252A Previous version: Dec. 1996 DESCRIPTION The MSM514252A is an 1-Mbit CMOS multiport DRAM composed of a 262,144-word by 4-bit dynamic RAM, and a 512-word by 4-bit static serial access memory, SAM port. The RAM port and SAM port operate independently and asynchronously. The MSM514252A supports three types of operations: 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: 256K word ¥ 4 bits SAM port: 512 word ¥ 4 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 512 tap location RAM-SAM bidirectional, Read/Write/Pseudo write, Real time read transfer Package options: 28-pin 400 mil plastic ZIP (ZIP28-P-400-1.27) (Product : MSM514252A-xxZS) 28-pin 400 mil plastic SOJ (SOJ28-P-400-1.27) (Product : MSM514252A-xxJS) xx indicates speed rank. PRODUCT FAMILY Family MSM514252A-70 MSM514252A-80 MSM514252A-10...