1/5/10Pcs Sharp LH21256Z-12 NMOS 256K (256K x 1) DRAM Dynamic RAM 5V 16-pin ZIP

Description

1/5/10Pcs Sharp LH21256Z-12 NMOS 256K (256K x 1) DRAM Dynamic RAM 5V 16-pin ZIP
The LH21256 is a 262,144 word 1 bit dynamic RAM fabricated using N-channel 2-layer polysilicon gate proc- ess technology. With mulitiplexed address inputs and standard 16-pin ZIP package, it is easy to com- prise memory systems with high speed, low power consumption and large memory capacity. The LH21256 operates on a single +5 V power supply. The built-in high output substrate bias generator circuit eliminates sensitivity to undershoot on the input signals.
SPECIFICATIONS
Manufacturer: Sharp
Part Number: LH21256Z-12
262,144 x 1 bit organization
Access time: 120 ns
Cycle times: 230 ns
Page mode operation
Power supply: +5 V ± 10% (4.5V to 5.5V)
Power consumption:
- Operating: 467.5/440/385 mW (MAX.)
- Standby: 27.5 mW (MAX.)
TTL compatible I/O
Built-in gated CAS function
Separate I/O allows Early-Write action
Available for read modify write, RAS only refresh, hidden refresh, CAS before RAS refresh
256 refresh cycle (refreshing time 4 ms)
Built-in high output bias generator circuit
Packages: 16-pin, 325-mil ZIP
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