Renesas 7024L25GB

Overview

7024L25GB from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 25 ns maximum read cycle time (tRC), TTL-compatible 5V ±10% supply, and 1 µA typical standby current in low-power (L) mode - enabling battery-backed data retention down to 2V for industrial embedded systems requiring concurrent memory access.

For engineers reviewing the 7024L25GB datasheet, 7024L25GB pinout, 7024L25GB application, or 7024L25GB equivalent, this page delivers verified timing specs, master/slave arbitration behavior, semaphore flag implementation, BUSY flag logic, and package-specific terminal mapping - all confirmed against IDT's official 7024S/L datasheet (Rev. Feb.20.20).

Technical Context

The 7024L25GB implements full hardware port arbitration with dedicated BUSY output (Master) / BUSY input (Slave) signaling and on-chip semaphore logic supporting eight flags addressed via A0–A2. It operates fully asynchronously per port, permitting simultaneous reads of identical memory locations without contention.

Its dual 16-bit I/O buses support upper-byte (UB/UBR) and lower-byte (LB/LBR) control for multiplexed bus compatibility, while CE-controlled power-down reduces active current to 750 mW typ. and standby to 1 µA typ. - critical for battery-backed operation in real-time control subsystems.

Key Specifications

Pinout & Package

7024L25GB is packaged in a 100-pin TQFP (PNG100) with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad. All VCC pins require decoupling; all GND pins must be connected to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-25JC and AS7C34096B-25TIN, the 7024L25GB uniquely integrates hardware semaphore, master/slave BUSY signaling, and 2V data retention - making it irreplaceable in industrial and avionics systems demanding deterministic inter-processor coordination and fail-safe memory persistence.

Availability

7024L25GB is available at Aetrix Electronics and suitable for industrial motion controllers, dual-core communication bridges, avionics display systems, and programmable logic controllers requiring stable component supply across extended product lifecycles.

Supply support for 7024L25GB 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, RF, and sensor signal conditioning ICs - acquired by Renesas in 2019.

The 7024L25GB belongs to IDT's legacy high-speed dual-port SRAM family, engineered for deterministic real-time systems where concurrent memory access, hardware arbitration, and battery-backed reliability are mandatory - particularly in industrial automation and aerospace.

FAQ

What is the guaranteed maximum read cycle time (tRC) for the 7024L25GB?

The 7024L25GB has a guaranteed maximum read cycle time (tRC) of 25 ns across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply. This specification is production-tested and ensures reliable operation in 40 MHz synchronous bus environments without added wait states or timing margining.

Does the 7024L25GB support battery backup operation, and what is the minimum retention voltage?

Yes, the 7024L25GB supports battery backup operation with guaranteed data retention down to 2.0 V (VDR). In full standby mode (ISB3), it draws only 1 µA typical current at 2V - enabling multi-year retention using standard CR2032 coin cells in industrial control and medical devices.

How does the Master/Slave (M/S) pin configure BUSY flag behavior on the 7024L25GB?

When M/S = HIGH, the 7024L25GB operates as Master: BUSYL and BUSYR become push-pull outputs indicating port contention. When M/S = LOW, it operates as Slave: BUSYL and BUSYR become inputs accepting BUSY signals from a Master device - enabling seamless cascading for 32-bit+ memory expansion without external logic.

What is the function of the SEM pins on the 7024L25GB, and how many semaphore flags are available?

The SEML and SEMR pins enable the on-chip semaphore register. Eight independent semaphore flags are implemented, addressed by A0–A2 and accessed via I/O0–I/O15. Writing to I/O0 sets the flag; reading returns its state - providing atomic, hardware-accelerated resource locking for dual-processor synchronization in real-time systems.

Which package type is used for the 7024L25GB, and what are its key mechanical dimensions?

The 7024L25GB uses a 100-pin Thin Quad Flatpack (TQFP) package (IDT code PNG100), measuring 14 mm × 14 mm × 1.4 mm with 0.5 mm lead pitch. It features an exposed thermal pad and complies with JEDEC MO-159 standards - optimized for reflow soldering and thermal management in dense industrial PCB layouts.