Description

The µPD45128441, 45128841, 45128163 are high-speed 134,217,728-bit synchronous dynamic random-access memories, organized as 8,388,608 × 4 × 4, 4,194,304 × 8 × 4, 2,097,152 × 16 × 4 (word × bit × bank), respectively.

The synchronous DRAMs achieved high-speed data transfer using the pipeline architecture.

Features

• Fully Synchronous Dynamic RAM, with all signals referenced to a positive clock edge

• Pulsed interface

• Possible to assert random column address in every cycle

• Quad internal banks controlled by BA0(A13) and BA1(A12)

• Byte control (×16) by LDQM and UDQM

• Programmable Wrap sequence (Sequential / Interleave)

• Programmable burst length (1, 2, 4, 8 and full page)

• Programmable /CAS latency (2 and 3)

• Ambient temperature (TA): −40 to + 85°C

• Automatic precharge and controlled precharge

• CBR (Auto) refresh and self refresh

• ×4, ×8, ×16 organization

• Single 3.3 V ± 0.3 V power supply

• LVTTL compatible inputs and outputs

• 4,096 refresh cycles / 64 ms

• Burst termination by Burst stop command and Precharge command