HMD2564Z1

HANBit HMD2564Z1 1Mbit(256x4bit) Fast Page Mode, 1K Refresh, 20Pin ZIP, 5V Design Part No. HMD2564Z1 DESCRIPTION The HMD2564Z1 is an 256K x 4 bits Fast Page Mode CMOS DRAMs. Fast Page Mode offers high speed random access of memory cells within the same row. Power supply voltage (+5V ), access time (-5, -6), power consumption(Normal or Low power), and package type (ZIP) are optional features of this Module. The HMD2564Z1 have CAS-before-RAS refresh, RAS-only refresh and Hidden refresh capabilities. The HMD2564Z1 is optimized for application to the systems, which are required high density and large capacity such as main www.DataSheet4U.com memory for main frames and mini computers, personal computer and high performance microprocessor systems. The HMD2564Z1 provides common data and outputs. Features w Fast Page Mode operation w CAS-before-RAS refresh capability w RAS-only and Hidden refresh capability w Fast parallel test mode capability w TTL(5V) compatible inputs and outputs w Early write or output enable controlled write w Available in 20pin ZIP packages w Single +5V± 10% power supply w 1,024 Refresh Cycles/16ms w Performance Range Speed HMD2564Z1-5 HMD2564Z1-6 tRAC 50 60 tCAC 15 15 tRC 90 110 tPC 35 40 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 PIN ASSIGNMENT SYMBOL /OE /CAS DQ2 DQ3 VSS DQ0 DQ1 /WE /RAS NC A0 A1 A2 A3 VCC A4 A5 A6 A7 A8 PIN DESCRIPTION PIN A0 – A9 DQ0 – DQ3 /RAS /CAS /OE FUNCTION Address Inputs Data Input/Output Row Address Strobe Column Address Strobe Data Ou...