General Description

The A428316 is a new generation randomly accessed memory for graphics, organized in a 262,144-word by 16- bit configuration. This product can execute Byte Write and Byte Read operation via two CAS pins.

The A428316 offers an accelerated Fast Page Mode

This allow random access of up to 512 words within a row at a 83/62 MHz EDO cycle, making the A428316 ideally suited for graphics, digital signal processing and high performance computing systems.

Features

■ Organization: 262,144 words X 16 bits

■ Part Identification

- A428316 (512 Ref.)

■ Single 5.0V power supply/built-in VBB generator

■ Low power consumption

- Operating: 110mA (-25 max)

- Standby: 2.5mA (TTL), 1.0mA (CMOS)

1.0mA (Self-refresh current)

■ High speed

- 25/35 ns RAS access time

- 12/17 ns column address access time

- 8/10 ns CAS access time

- 12/16 ns EDO Page Mode Cycle Time

■ Industrial operating temperature range: -40°C to 85°C for -U

■ Fast Page Mode with Extended Data Out

■ Separate CAS (UCAS ,LCAS ) for byte selection

■ 512 Refresh Cycle in 8ms

■ Read-modify-write, RAS -only, CAS -before- RAS , Hidden refresh capability

■ TTL-compatible, three-state I/O

■ JEDEC standard packages

- 400mil, 40-pin SOJ

- 400mil, 40/44 TSOP type II package