Features:
◆ 256K x 18 Synchronous Bank-Switchable Dual-ported SRAM
Architecture
– 64 independent 4K x 18 banks
– 4 megabits of memory on chip
◆ Bank access controlled via bank address pins
◆ High-speed data access
– Commercial: 3.4ns (200MHz)/3.6ns (166MHz)/
4.2ns (133MHz) (max.)
– Industrial: 4.2ns (133MHz) (max.)
◆ Selectable Pipelined or Flow-Through output mode
◆ Counter enable and repeat features
◆ Dual chip enables allow for depth expansion without
additional logic
◆ Full synchronous operation on both ports
– 5ns cycle time, 200MHz operation (14Gbps bandwidth)
– Fast 3.4ns clock to data out
– 1.5ns setup to clock and 0.5ns hold on all control, data, and
address inputs @ 200MH
– Data input, address, byte enable and control registers
– Self-timed write allows fast cycle time
◆ Separate byte controls for multiplexed bus and bus matching
compatibility
◆ LVTTL- compatible, 3.3V (±150mV) power supply
for core
◆ LVTTL compatible, selectable 3.3V (±150mV) or 2.5V
(±100mV) power supply for I/Os and control signals on each
port
◆ Industrial temperature range (-40°C to +85°C) is
available at 133MHz
◆ Available in a 208-pin fine pitch Ball Grid Array (fpBGA) and
256-pin Ball Grid Array (BGA)
◆ Supports JTAG features compliant with IEEE 1149.1
◆ Green parts available, see ordering information