Renesas 7024L15J

Overview

7024L15J from IDT is a high-speed 4K × 16 true dual-port static RAM with 15 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and 2V battery backup data retention. It features independent left/right ports with full asynchronous access, on-chip semaphore logic, and master/slave arbitration for 32-bit+ bus expansion in real-time embedded systems.

For engineers reviewing the 7024L15J datasheet, 7024L15J pinout, 7024L15J application, or 7024L15J equivalent, this device is selected for deterministic inter-processor communication, low-latency shared memory in avionics and test equipment, and systems requiring simultaneous read/write to identical addresses without contention.

Technical Context

The 7024L15J implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves simultaneous access via BUSY flag signaling and supports both master (BUSY output) and slave (BUSY input) configurations using the M/S pin.

It integrates full hardware semaphore support across eight flags addressed by A0–A2, enabling atomic resource locking between ports. The device operates in three power modes-active, standby (TTL-level inputs), and full standby (CMOS-level inputs)-with typical active current of 170 mA and full standby current as low as 0.2 mA.

Key Specifications

Pinout & Package

7024L15J is housed in a 100-pin TQFP (PNG100) package with 0.5 mm lead pitch and 14 mm × 14 mm body size. Pin assignments follow standard dual-port layout with mirrored left/right I/O, address, and control groups, plus dedicated semaphore, interrupt, and BUSY signaling pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-133AXC and AS7C34096A-15JC, the 7024L15J uniquely delivers deterministic sub-15 ns dual-port access with integrated hardware arbitration - making it irreplaceable in hard real-time systems where timing predictability outweighs raw bandwidth.

Availability

7024L15J is available at Aetrix Electronics and suitable for aerospace data acquisition, digital signal processing systems, and automated test equipment requiring stable component supply across extended production lifecycles.

Supply support for 7024L15J 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 since 2019.

The 7024L15J belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in military, industrial, and commercial real-time systems where hardware-enforced arbitration is critical.

FAQ

What is the maximum operating frequency supported by the 7024L15J?

The 7024L15J supports a maximum read cycle time (tRC) of 15 ns, corresponding to a theoretical maximum sustained access rate of 66.7 MHz per port. This timing is guaranteed under commercial temperature conditions (0°C to +70°C) with VCC = 5.0 V ±10%. The 7024L15J does not specify a clock frequency because it is an asynchronous device - operation depends solely on control signal timing margins, not a system clock.

Does the 7024L15J support battery backup, and what voltage is required?

Yes, the 7024L15J supports battery backup data retention at VCC = 2.0 V minimum, as specified in its data retention characteristics. This allows the device to maintain valid memory contents during main power loss when backed by a coin-cell or auxiliary rail. The 7024L15J draws only 100 µA typical ICCDR current in this mode, enabling multi-year retention with standard CR2032 batteries.

How does the M/S pin configure master vs. slave operation in the 7024L15J?

In the 7024L15J, the M/S pin sets the device's arbitration role: when M/S = HIGH, BUSYR functions as an output flag indicating port contention; when M/S = LOW, BUSYL serves as an input that accepts the BUSY signal from a master device. This enables cascaded configurations where one 7024L15J acts as master coordinating multiple slaves - essential for expanding data bus width beyond 16 bits without external logic.

Can the 7024L15J perform simultaneous reads from both ports to the same memory address?

Yes, the 7024L15J uses true dual-port memory cells that allow completely independent, simultaneous reads from both left and right ports to identical addresses. No arbitration or delay is required - both ports output valid data within their respective tAA (15 ns max) access times. This capability is fundamental to its use in real-time systems requiring concurrent monitoring and control.

What package type is used for the 7024L15J, and are thermal or mechanical drawings available?

The 7024L15J is packaged in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm lead pitch and a 14 mm × 14 mm body size (PNG100). Mechanical drawings, land patterns, and thermal resistance data (θJA ≈ 45°C/W) are available in IDT's official packaging documentation - these are referenced in the 7024S/L datasheet revision Feb.20.20, Figure 2740 drw 03.