DESCRIPTION

The MSM54V16272 is a 4-Mbit CMOS multiport DRAM composed of a 262,144-word by 16-bit dynamic RAM, and a 512-word by 16-bit SAM. Its RAM and SAM operate independently and asynchronously.

FEATURES

• Single power supply: 3.3 V ±0.3 V

• Full TTL compatibility

• Multiport organization

RAM : 256K word x 16 bits

SAM : 512 word x 16 bits

• Fast page mode

• Write per bit

• Byte read/write

• Masked flash write

• Masked block write (8 columns)

• RAS only refresh

• CAS before RAS refresh

• CAS before RAS self-refresh

• Hidden refresh

• Serial read/write

• 512 tap location

• Bidirectional data transfer

• Split transfer

• Masked write transfer

• Refresh: 512 cycles/8 ms

• Package options:

64-pin 525 mil plastic SSOP (SSOP64-P-525-0.80-K) (Product : MSM54V16272-xxGS-K)

70/64-pin 400 mil plastic TSOP (Type II)(TSOPII70/64-P-400-0.65-K)(Product : MSM54V16272-xxTS-K)

xx indicates speed rank.