HM621400H Datasheet, PDF (1/13 Pages) Hitachi Semiconductor – 4M High Speed SRAM (4-Mword x 1-bit)

HM621400H Series
4M High Speed SRAM (4-Mword × 1-bit)
ADE-203-787D (Z)
Rev. 1.0
Sep. 15, 1998
Description
The HM621400H is a 4-Mbit high speed static RAM organized 4-Mword × 1-bit. It has realized high speed
access time by employing CMOS process (4-transistor + 2-poly resistor memory cell)and high speed circuit
designing technology. It is most appropriate for the application which requires high speed and high density
memory, such as cache and buffer memory in system. The HM621400H is packaged in 400-mil 32-pin SOJ
for high density surface mounting.
Features
• Single 5.0 V supply : 5.0 V ± 10 %
• Access time 10/12/15 ns (max)
• Completely static memory
 No clock or timing strobe required
• Equal access and cycle times
• Directly TTL compatible
 All inputs and outputs
• Operating current: 200/180/160 mA (max)
• TTL standby current: 70/60/50 mA (max)
• CMOS standby current: 5 mA (max)
: 1.2 mA (max) (L-version)
• Data retension current: 0.8 mA (max) (L-version)
• Data retension voltage: 2 V (min) (L-version)
• Center V_CC and V_SS type pinout