Renesas 7024L25J8

Overview

7024L25J8 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 memory access without arbitration overhead.

For engineers reviewing the 7024L25J8 datasheet, 7024L25J8 pinout, 7024L25J8 application, or 7024L25J8 equivalent, this page delivers verified timing specs (tAA = 25 ns, tACE = 25 ns), standby current (1 µA typical full standby), BUSY/INT semaphore logic behavior, and package-specific pin validation for the 84-pin PLCC variant.

Technical Context

The 7024L25J8 implements fully asynchronous dual-port architecture with on-chip arbitration logic, enabling concurrent reads/writes to the same address location while maintaining data coherency via hardware semaphore flags (8 flags, addressed by A0–A2). Its Master/Slave select (M/S) pin configures BUSY as output (Master) or input (Slave) to coordinate cascaded 32-bit+ memory expansion.

It supports battery backup operation at 2V with ≤4 mA retention current, uses CMOS process for low-power performance (750 mW active, 1 µA full standby), and provides separate upper-byte (UBR/UBL) and lower-byte (LBR/LBL) enables for multiplexed bus compatibility - all without external logic.

Key Specifications

Pinout & Package

7024L25J8 is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈1.15 in × 1.15 in × 0.17 in, with lead pitch 0.05 in and gull-wing leads. All VCC pins require connection to 5V supply; all GND pins must be tied to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-25AXC and IDT70V24S25PFI, the 7024L25J8 uniquely combines 84-pin PLCC packaging, 25 ns speed, industrial temperature rating, and 2V data retention - making it the sole option for compact, battery-backed, high-reliability dual-port memory in constrained military platforms.

Availability

7024L25J8 is available at Aetrix Electronics and suitable for radar signal processing, avionics flight control, and secure communications crypto engines requiring stable component supply across extended product lifecycles.

Supply support for 7024L25J8 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 interface, and RF solutions for communications, computing, and industrial markets.

The IDT7024 family was engineered specifically for deterministic, low-latency inter-processor communication in safety-critical embedded systems - emphasizing hardware arbitration, semaphore support, and robust military/industrial environmental tolerance.

FAQ

What is the operating temperature range specified for the 7024L25J8?

The 7024L25J8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed by the "J8" suffix in its part number and validated in Table 2 of the official datasheet. This range applies to all DC and AC specifications including 25 ns timing parameters and 1 µA standby current.

Does the 7024L25J8 support battery backup operation, and what voltage is required?

Yes, the 7024L25J8 supports battery backup operation with guaranteed data retention down to 2.0 V VCC, as documented in Table 10 (Data Retention Characteristics). At 2V, typical retention current is 100 µA with a maximum of 4 mA - enabling long-term hold in systems with backup lithium or supercapacitor sources.

How does the M/S pin affect BUSY functionality on the 7024L25J8?

When M/S = H (high), the 7024L25J8 operates as Master: BUSYL and BUSYR become push-pull outputs indicating port contention. When M/S = L (low), it operates as Slave: BUSYL and BUSYR become inputs, allowing cascaded devices to coordinate access - a requirement for expanding to 32-bit+ word widths without external logic.

What is the significance of the "L" in 7024L25J8, and how does it differ from the "S" version?

The "L" denotes the low-power variant: 7024L25J8 delivers 1 µA typical full-standby current (ISB3) versus 5 µA for the "S" version, and enables 2V data retention - a capability absent in the "S" variant. Both share identical 25 ns speed grade and industrial temperature rating, but only the "L" supports battery backup.

Which package type corresponds to the 7024L25J8 part number, and are pinouts identical across variants?

The 7024L25J8 uses the 84-pin PLCC (Plastic Leaded Chip Carrier) package, as confirmed by the "J8" suffix and Pin Configuration diagrams in the datasheet. Pinouts are identical across 84-pin PGA, Flatpack, and PLCC variants - all share the same signal mapping and mechanical pin numbering, though thermal and mounting characteristics differ.