DESCRIPTION
The MSM548263 is a 2-Mbit CMOS multiport DRAM composed of a 262,144-word by 8-bit dynamic RAM, and a 512-word by 8-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 8 bits
    SAM : 512 word x 8 bits
• Extended page mode
• Write per bit
• Persistent write per bit
• Masked flash write
• Masked block write
• RAS only refresh
• CAS before RAS refresh
• Hidden refresh
• Serial read/write
• 512 tap location
• Programmable stops
• Bidirectional data transfer
• Split transfer
• Masked write transfer
• Refresh: 512 cycles/8 ms
• Package options:
    40-pin 400 mil plastic SOJ (SOJ40-P-400-1.27) (Product : MSM548263-xxJS)
    44/40-pin 400 mil plastic TSOP (Type II)(TSOPII44/40-P-400-0.80-K)(Product : MSM548263-xxTS-K)
                                                                                                                xx indicates speed rank.