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IS62C5128EL-45QLI

IS62C5128EL-45QLI

ISSI, Integrated Silicon Solution Inc
SRAM - Asynchronous Memory IC 4Mbit Parallel 45 ns 32-SOP
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Overview

The IS62C5128EL-45QLI is a 4Mbit asynchronous CMOS static RAM organized as 512K x 8 bits. It operates on a single 5V supply and features a fast 45 ns access time, making it suitable for high-speed memory buffering and legacy system maintenance. The device is designed for low power consumption and is compatible with standard TTL interface levels.

Why Choose This Part

This SRAM offers a low standby current of 16 uA and a maximum operating current of 22 mA, which is ideal for power-sensitive industrial applications. The 45 ns access time ensures compatibility with high-speed parallel buses without requiring excessive wait states. Its 32-pin SOP package provides a robust surface-mount solution with 1.27mm pitch for easier PCB assembly compared to fine-pitch alternatives.

Applications

Legacy System Maintenance
Drop-in memory replacement for vintage industrial controllers and 8-bit or 16-bit computing systems requiring 5V logic.
Data Buffering
High-speed temporary storage for communication controllers and peripheral interface units needing fast parallel access.
Embedded Control Units
Primary program or data memory for industrial microcontrollers where non-volatile storage is not required and low standby current is beneficial.

Key Specifications

Technology SRAM - Asynchronous
Access Time 45 ns
Memory Size 4Mbit
Memory Type Volatile
Memory Format SRAM
Mounting Type Surface Mount
Package / Case 32-SOIC (0.445", 11.30mm Width)
Memory Interface Parallel
Voltage - Supply 4.5V ~ 5.5V
Memory Organization 512K x 8
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 32-SOP
Write Cycle Time - Word, Page 45ns

Getting Started

To use this device, interface the 19 address lines and 8 data lines to your microcontroller's external memory interface (EMIF) or a latch-based parallel bus. Ensure the VDD supply is decoupled with a 0.1 uF ceramic capacitor placed close to the power pin. Since it is an asynchronous SRAM, no external clock is required; simply toggle the Chip Select (CS) and Output Enable (OE) pins to perform read and write operations.

Also Consider

AS6C4008-55PCN Alliance Memory, Inc. - Provides a similar 512K x 8 configuration in a 5V-compatible DIP package for through-hole prototyping.

Categories

Memory & Storage > SRAM