Renesas 7024S45J8

Overview

7024S45J8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 45 ns maximum read cycle time (tRC), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic-designed for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 7024S45J8 datasheet, 7024S45J8 pinout, 7024S45J8 application, or 7024S45J8 equivalent, this page delivers verified timing specs (tAA = 45 ns), power metrics (750 mW active, 5 mW standby), bus arbitration behavior, and industrial-grade (-40°C to +85°C) operation-all confirmed for the exact 7024S45J8 variant.

Technical Context

The 7024S45J8 implements fully asynchronous dual-port access with separate address, data, and control buses per port, enabling simultaneous reads of identical memory locations without contention. Its on-chip arbitration logic resolves port conflicts via BUSY flag signaling and supports Master/Slave cascading for 32-bit+ word expansion.

It integrates full hardware semaphore support (8 flags, addressed by A0–A2), interrupt flag generation (INTL/INTR), and battery-backed data retention down to 2V-leveraging CMOS process for low-power operation while maintaining TTL-level compatibility and deterministic timing across commercial and industrial temperature ranges.

Key Specifications

Pinout & Package

7024S45J8 is packaged in an 84-pin PLCC (PLG84) with 0.050" lead pitch and 1.15" × 1.15" body size. All VCC and GND pins require direct connection to respective power planes; N/C pins must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Compared with CY7C024AV-45AXC and IDT70V24S45PF, the 7024S45J8 uniquely integrates Master/Slave select and full semaphore logic in a 5V-native 84-pin PLCC-making it optimal for cost-sensitive, space-constrained industrial controllers requiring drop-in expandability.

Availability

7024S45J8 is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and medical imaging equipment requiring stable component supply across extended product lifecycles.

Supply support for 7024S45J8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, and RF solutions, now part of Renesas Electronics.

The IDT7024 family was engineered for deterministic, low-latency inter-processor communication in real-time embedded systems-prioritizing hardware arbitration, dual-port concurrency, and industrial reliability over density or cost-per-bit.

FAQ

What is the maximum operating speed of the 7024S45J8?

The 7024S45J8 has a guaranteed maximum read cycle time (tRC) of 45 ns and address access time (tAA) of 45 ns across the full industrial temperature range (-40°C to +85°C). This enables reliable operation at up to ~22 MHz sustained read throughput per port without wait states, validated under worst-case voltage (4.5 V) and temperature conditions.

Does the 7024S45J8 support battery backup operation?

Yes, the 7024S45J8 supports data retention at VCC = 2.0 V minimum, drawing only 100 µA typical current in retention mode. This allows seamless operation during main power interruption-critical for applications like industrial controllers where volatile memory loss could trigger unsafe states.

How does the Master/Slave configuration work on the 7024S45J8?

When M/S = HIGH, the 7024S45J8 operates as Master: BUSY is driven as an output flag indicating port contention. When M/S = LOW, it operates as Slave: BUSY becomes an input that must be asserted externally to block writes. This enables deterministic priority resolution in cascaded configurations without external logic.

What package type is used for the 7024S45J8?

The 7024S45J8 is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC, package code PLG84) with 1.15" × 1.15" body size and 0.050" lead pitch. It is RoHS-compliant and rated for industrial temperature operation, offering robust thermal performance and ease of rework compared to PGA or flatpack alternatives.

Can the 7024S45J8 perform simultaneous reads from both ports to the same memory location?

Yes-the 7024S45J8 uses true dual-port memory cells that allow completely independent, simultaneous reads from both left and right ports to identical addresses with no timing penalty or arbitration overhead. This capability is fundamental to its use in real-time inter-processor synchronization and is explicitly guaranteed in the device architecture.