DESCRIPTION

The MSM514262 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 SAM. Its RAM and SAM operate independently and asynchronously.

FEATURES

• Single power supply: 5 V ±10

• Full TTL compatibility

• Multiport organization

RAM: 256K word x 4 bits

SAM: 512 word x 4 bits

• Fast page mode

• Write per bit

• Masked flash write

• Masked block write

• RAS only refresh

• CAS before RAS refresh

• Hidden refresh

• Serial read/write

• 512 tap location

• Bidirectional data transfer

• Split transfer

• Masked write transfer

• Refresh: 512 cycles/8 ms

• Package options:

28-pin 400 mil plastic ZIP (ZIP28-P-400-1.27) (Product : MSM514262-xxZS)

28-pin 400 mil plastic SOJ (SOJ28-P-400-1.27) (Product : MSM514262-xxJS)

xx indicates speed rank.