General Description The A42U2604 is a new generation randomly accessed memory for graphics, organized in a 4,194,304-word by 4-bit configuration. This product can execute Write and Read operation via CAS pin. The A42U2604 offers an accelerated Fast Page Mode cycle with a feature called Extended Data Out (EDO). This allow random access of up to 2048(2K Ref.) words within a row at a 50/42/31 MHz EDO cycle, making the A42U2604 ideally suited for graphics, digital signal processing and high performance computing systems. Features ■ Organization: 4,194,304 words X 4 bits ■ Part Identification - A42U2604 (2K Ref.) ■ Single 2.5V power supply/built-in VBB generator ■ Low power consumption - Operating: 70mA (-50 max) - Standby: 0.5mA (TTL), 0.2mA (CMOS), 300µA (Self-refresh current) ■ High speed - 50/60/80 ns RAS access time - 22/27/37 ns column address access time - 13/15/20 ns CAS access time - 20/24/32 ns EDO Page Mode Cycle Time ■ Industrial operating temperature range: -40°C to +85°C for -U ■ Fast Page Mode with Extended Data Out ■ 2K Refresh Cycle in 32ms ■ Read-modify-write, RAS -only, CAS -before- RAS , Hidden refresh capability ■ TTL-compatible, three-state I/O ■ JEDEC standard packages - 300mil, 24/26-pin SOJ - 300mil, 24/26-pin TSOP type II package
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