Renesas 7025L20J

Overview

IDT7025L20J from Integrated Device Technology (IDT) is a high-speed 8K × 16-bit true dual-port static RAM with 20 ns maximum access time, TTL-compatible 5V ±10% operation, and 1 mW typical standby power. It supports simultaneous independent read/write access on left and right ports, features on-chip semaphore logic and BUSY arbitration, and is used in real-time embedded systems requiring deterministic memory coherency-such as digital signal processors interfacing with host controllers.

For engineers reviewing the IDT7025L20J datasheet, IDT7025L20J pinout, IDT7025L20J application, or IDT7025L20J equivalent, key selection criteria include dual-port timing symmetry, 2V data retention capability, M/S-configurable master/slave cascading for 32-bit bus expansion, and industrial temperature support (–40°C to +85°C) in the PLCC-84 package.

Technical Context

The IDT7025L20J implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent non-contention reads/writes to any memory location. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion and supports semaphore signaling across eight flags addressed by A0–A2.

It integrates independent upper-byte (UB/UBR) and lower-byte (LB/LBR) enables for multiplexed bus compatibility, and uses CMOS process technology to achieve 750 mW typical active power and 1 mW typical standby power-enabling battery-backed operation at 2V with guaranteed data retention.

Key Specifications

Pinout & Package

Package: 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 29.2 mm × 29.2 mm × 3.9 mm, lead pitch 1.27 mm, JEDEC MS-026AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-200BAXI and AS7C3256A-20JCIN, the IDT7025L20J uniquely delivers 5V TTL compatibility, integrated hardware semaphores, and 2V data retention in an industrial-qualified PLCC package-making it irreplaceable for legacy avionics, medical, and industrial control systems requiring deterministic dual-port behavior without redesign.

Availability

IDT7025L20J is available at Aetrix Electronics and suitable for digital signal processing systems, real-time industrial controllers, and avionics data acquisition units requiring stable component supply across extended product lifecycles.

Supply support for IDT7025L20J 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

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

The IDT7025 family was designed specifically for deterministic real-time embedded systems requiring hardware-coherent shared memory between heterogeneous processors-targeting aerospace, medical imaging, and industrial automation markets.

FAQ

What is the maximum operating temperature range for the IDT7025L20J?

The IDT7025L20J is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including 20 ns access time, standby current, and data retention-ensuring reliable performance in harsh environments such as factory automation and outdoor telecom equipment without thermal derating.

Does the IDT7025L20J support battery backup operation, and what voltage is required?

Yes, the IDT7025L20J supports battery backup operation with guaranteed data retention down to 2.0 V. At this voltage, it draws ≤4000 µA (typical 100 µA) in retention mode, enabling long-term state preservation during main power loss-critical for medical devices and avionics black-box recorders.

How does the M/S pin configure master versus slave operation in the IDT7025L20J?

When M/S = HIGH, the IDT7025L20J operates as Master: BUSYL/BUSYR become push-pull outputs asserting BUSY during port contention. When M/S = LOW, it operates as Slave: BUSYL/BUSYR become inputs, allowing external BUSY chaining in multi-device 32-bit memory systems-enabling seamless width expansion without additional logic.

Can the IDT7025L20J perform simultaneous reads from both ports to the same memory address?

Yes, the IDT7025L20J supports true simultaneous reads to the same memory location from both ports with no arbitration delay or data corruption. This capability is inherent to its dual-port SRAM cell design and is explicitly guaranteed in the datasheet-unlike pseudo-dual-port or FIFO-based alternatives that require serialization.

What package type is used for the IDT7025L20J, and is it RoHS-compliant?

The IDT7025L20J is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC) package, compliant with JEDEC standard MS-026AC. It is RoHS-compliant (lead-free terminations) and qualified for reflow soldering per J-STD-020, supporting automated PCB assembly in industrial and medical manufacturing lines.