Renesas 7025L35G

Overview

7025L35G from IDT (Integrated Device Technology) is a high-speed 8K × 16-bit true dual-port static RAM with independent left/right ports, 35 ns max read cycle time, TTL-compatible 5V ±10% supply, and 2V battery backup data retention. It supports simultaneous asynchronous access to the same memory location and is used in real-time inter-processor communication, video frame buffers, and military-grade embedded systems requiring deterministic arbitration.

For engineers reviewing the 7025L35G datasheet, 7025L35G pinout, 7025L35G application, or 7025L35G equivalent, key selection criteria include BUSY-flag arbitration timing (tBAA ≤ 20 ns), semaphore flag support (8 flags via A0–A2), low standby current (1 µA typical at 2V), and compatibility with MASTER/SLAVE cascading for 32-bit+ bus expansion.

Technical Context

The 7025L35G implements full hardware port arbitration with dedicated BUSY output (Master) or BUSY input (Slave) controlled by the M/S pin. Its on-chip semaphore logic enables eight independent binary flags accessed via I/O0–I/O15 using address lines A0–A2, supporting mutual exclusion in multi-CPU systems without external logic.

It operates fully asynchronously from either port, with separate CE, R/W, OE, UB/LB controls per port, and supports byte-selectable writes (upper/lower 8-bit lanes). The device enters ultra-low-power data retention mode at VCC = 2V, drawing ≤4 mA typical ICCDR across all temperature grades.

Key Specifications

Pinout & Package

7025L35G is housed in a 100-pin TQFP (PNG100) package measuring 14 mm × 14 mm × 1.4 mm, with exposed thermal pad and standard 0.5 mm pitch. Pin functions are symmetrically distributed for left (L) and right (R) ports.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-35VC and IDT70V25L35PF, the 7025L35G uniquely delivers military-grade reliability, 2V data retention, and native 5V TTL interoperability-making it irreplaceable in deployed defense electronics where environmental robustness and power-fail resilience are mandatory.

Availability

7025L35G 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 temperature ranges and long production lifecycles.

Supply support for 7025L35G 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 RF solutions, now part of Renesas Electronics since 2019.

The IDT7025 product line was engineered for deterministic, low-latency inter-processor communication in mission-critical military and industrial systems-prioritizing hardware arbitration, data integrity under power loss, and extreme temperature operation.

FAQ

What is the maximum operating temperature range supported by the 7025L35G?

The 7025L35G is rated for −55°C to +125°C operation and is manufactured in compliance with MIL-PRF-38535 QML, making it suitable for aerospace, defense, and downhole industrial applications where thermal extremes are routine. This specification is verified per the October 2019 DSC 2683/13 datasheet revision and applies to all 7025L35G units shipped under military-grade screening.

Does the 7025L35G support battery backup data retention, and at what voltage?

Yes, the 7025L35G supports data retention at VCC = 2.0 V, drawing ≤4000 µA (typical 100 µA) in retention mode. This feature is exclusive to the "L" (low-power) variant and is confirmed in Table 10 of the datasheet. It enables persistent storage during main power failure without external circuitry.

How does the BUSY arbitration mechanism work in the 7025L35G when configured as Master?

When M/S = H, the 7025L35G operates as Master and asserts BUSYR upon address or chip-enable contention detected on the right port. Timing parameters tBAA (≤20 ns) and tBDD (≤35 ns) define response and data-valid windows. This hardware arbitration prevents simultaneous writes without CPU intervention-verified in Waveforms 13–16 of the datasheet.

Can the 7025L35G be cascaded to support 32-bit data paths, and how is this implemented?

Yes, the 7025L35G supports 32-bit expansion via MASTER/SLAVE configuration. One device is set as Master (M/S = H) driving BUSYR; others are Slaves (M/S = L) accepting BUSYL as input. The datasheet confirms this topology enables full-speed, error-free 32-bit operation without discrete logic-described in the Functional Description section on page 2.

What is the purpose of the SEM pins, and how many semaphore flags does the 7025L35G provide?

The SEML and SEMR pins enable access to eight hardware semaphore flags stored in dedicated registers. These flags are addressed via A0–A2 and written using I/O0; all 16 I/O lines reflect flag state on read. This functionality is intrinsic to the 7025L35G silicon and eliminates software-based locking-detailed in Truth Table II (page 5) and Semaphore Timing (page 13).