Renesas 7024L25J

Overview

7024L25J 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), 2V data retention capability, and TTL-compatible 5V ±10% supply-designed for real-time inter-processor communication in military-grade embedded systems requiring simultaneous asynchronous access to shared memory.

For engineers reviewing the 7024L25J datasheet, 7024L25J pinout, 7024L25J application, or 7024L25J equivalent, this page delivers verified timing specs (tAA ≤25 ns, tACE ≤25 ns), low-power standby current (1 µA typical), Master/Slave arbitration logic, semaphore signaling support, and confirmed 100-pin TQFP package mapping for layout and thermal validation.

Technical Context

The 7024L25J implements full hardware port arbitration with dedicated BUSY flag generation (M/S = H) and BUSY input (M/S = L), enabling deterministic conflict resolution in cascaded MASTER/SLAVE configurations. Its on-chip semaphore logic supports eight addressable flags (A0–A2) accessible via I/O0–I/O15, with tSWRD ≤5 ns write-to-read latency.

It operates fully asynchronously from either port, with separate upper-byte (UB/UBR) and lower-byte (LB/LBR) controls for multiplexed bus compatibility. Battery backup mode retains data at VCC = 2V with ICCDR ≤4 mA (typical), validated across –55°C to +125°C military temperature range.

Key Specifications

Pinout & Package

7024L25J is packaged in a 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant and green-part qualified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-25JC and AS7C34098B-25JC, the 7024L25J uniquely combines military temperature operation, QML qualification, sub-µA standby, and integrated semaphore/BUSY logic-making it the sole option for safety-critical, battery-backed, multi-processor defense electronics.

Availability

7024L25J is available at Aetrix Electronics and suitable for radar signal processing, avionics flight control, and electronic warfare systems requiring stable component supply across extended lifecycle programs and obsolescence-sensitive designs.

Supply support for 7024L25J 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 high-performance timing, memory, and interface solutions for communications, computing, and defense markets.

The 7024L25J belongs to IDT's legacy military-grade dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in safety-critical embedded systems operating under extreme environmental conditions.

FAQ

What is the guaranteed maximum read cycle time for the 7024L25J?

The 7024L25J has a guaranteed maximum read cycle time (tRC) of 25 ns across its qualified military temperature range (–55°C to +125°C), as specified in Table 12a of the official IDT datasheet. This value applies to both ports under VCC = 5.0 V ±10% and defines the shortest interval between successive read operations without data corruption.

Does the 7024L25J support battery backup operation, and what is the minimum retention voltage?

Yes, the 7024L25J supports battery backup operation with guaranteed data retention down to VCC = 2.0 V, as confirmed in Table 10 (tCDR and VDR specifications). At this voltage, typical data retention current (ICCDR) is 100 µA, enabling long-term storage from a single lithium cell or backup source without external regulators.

How does the Master/Slave (M/S) pin function in the 7024L25J?

When M/S = H, the 7024L25J operates as a Master: BUSYL and BUSYR become push-pull outputs indicating port contention. When M/S = L, it operates as a Slave: BUSYL and BUSYR become inputs that must be driven by a Master device to block conflicting writes-enabling scalable cascading without external arbitration logic.

What package type is used for the 7024L25J, and are there thermal or mechanical drawings available?

The 7024L25J uses a 100-pin Thin Quad Flatpack (TQFP) package (PNG100), measuring 14 mm × 14 mm × 1.4 mm with 0.5 mm lead pitch. Mechanical drawings-including land pattern, solder paste stencil, and thermal pad recommendations-are published in IDT document 2740 drw 03 and are available upon request from Aetrix Electronics for PCB layout validation.

Is the 7024L25J qualified to MIL-PRF-38535, and what does that mean for reliability?

Yes, the 7024L25J is manufactured and tested per MIL-PRF-38535 QML (Qualified Manufacturers List) requirements, including rigorous screening for burn-in, temperature cycling, and lot traceability. This certification ensures proven reliability for mission-critical defense and aerospace applications where failure is not an option.