Renesas 7134LA35JI8

Overview

7134LA35JI8 from Renesas Electronics is a high-speed 4K × 8 dual-port static RAM with independent left/right asynchronous ports, 35 ns maximum read cycle time, 2V data retention capability, and military-grade operation (–55°C to +125°C) in a 52-pin PLCC package. It enables real-time inter-processor communication in radar signal processors and avionics bus arbiters where wait-state-free memory access is critical.

For engineers reviewing the 7134LA35JI8 datasheet, 7134LA35JI8 pinout, 7134LA35JI8 application, or 7134LA35JI8 equivalent, key selection criteria include dual-port contention management, battery-backed data retention at 2V, military temperature compliance, and PLCC-52 footprint compatibility with legacy IDT7134 designs.

Technical Context

The 7134LA35JI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-no on-chip arbitration logic required. Each port features independent chip enable (CEL/CER), output enable (OEL/OER), and read/write (R/WL/R/WR) controls, enabling external arbitration schemes for deterministic access timing.

It uses CMOS process technology to achieve 700 mW typical active power and 1 µA full-standby current (ISB3) under CMOS-level inputs. The LA variant supports true battery backup mode: when V_CC drops below 2V, data retention persists with ≤4 mA ICCDR draw from a 2V source.

Key Specifications

Pinout & Package

7134LA35JI8 is housed in a 52-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, body size ≈ 0.75 in × 0.75 in × 0.17 in, and pin 1 index marker located at top-left corner of top view.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1335KV18-35BZXI and AS7C34098B-35TIN, the 7134LA35JI8 uniquely combines military QML certification, 2V data retention, and PLCC-52 packaging-making it irreplaceable in retrofitting legacy avionics systems requiring drop-in compliance and fail-safe memory hold-up.

Availability

7134LA35JI8 is available at Aetrix Electronics and suitable for radar signal processors, avionics bus arbiters, and missile guidance control units requiring stable component supply across extended military lifecycle programs.

Supply support for 7134LA35JI8 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

Renesas Electronics Corporation is a global semiconductor leader delivering trusted microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT markets.

The IDT7134 family-including 7134LA35JI8-was originally developed by Integrated Device Technology (acquired by Renesas in 2019) specifically for high-reliability dual-ported memory applications in defense electronics and real-time embedded systems.

FAQ

What is the guaranteed data retention voltage for 7134LA35JI8?

The 7134LA35JI8 guarantees data retention down to 2.0 V, as specified in Table 7 (t_CDR and V_DR) of the Renesas datasheet. This allows the device to maintain memory contents during brownout conditions or when switched to a 2V backup battery-critical for fault-tolerant avionics and defense systems where uninterrupted state preservation is mandatory. The 7134LA35JI8 achieves this with ≤4 mA ICCDR current draw at V_CC = 2V.

Does 7134LA35JI8 support simultaneous read/write operations on both ports?

Yes, the 7134LA35JI8 supports fully independent asynchronous read and write operations on left and right ports-provided external arbitration prevents simultaneous access to the same memory location. Its dual-port architecture has no internal arbitration logic; users must implement external semaphores or priority schemes. The 7134LA35JI8 datasheet explicitly states that data integrity during contention is the user's responsibility, and timing parameters like t_WDD and t_DDD quantify port-to-port propagation delays.

What package type and pin count does 7134LA35JI8 use?

The 7134LA35JI8 uses a 52-pin Plastic Leaded Chip Carrier (PLCC) package, identified by code PLG52. Its top-view pinout includes dual 12-bit address buses (A0L–A11L and A0R–A11R), dual 8-bit bidirectional I/O banks (I/O0L–I/O7L and I/O0R–I/O7R), and independent control signals (CEL/CER, OEL/OER, R/WL/R/WR). Pin 1 is indexed at the top-left corner, and pins 49–52 are no-connect.

Is 7134LA35JI8 compliant with military specifications?

Yes, the 7134LA35JI8 is manufactured to MIL-PRF-38535 QML Class B standards, qualifying it for use in military and aerospace applications. It operates across –55°C to +125°C, undergoes rigorous screening (including burn-in and radiation hardness testing), and meets traceability and documentation requirements for defense procurement. The "M" grade designation in its ordering information confirms military temperature and reliability compliance.

How does the power consumption of 7134LA35JI8 compare between active and standby modes?

The 7134LA35JI8 draws 700 mW typical during active operation (ICC ≈ 140 mA at 5V), but reduces to just 0.2 mA typical in full-standby mode (ISB3) when both chip enables are held above V_CC − 0.2 V and all inputs are static. This 350× reduction enables ultra-low-power hold states-essential for battery-backed systems. The LA variant's 1 µA standby is significantly lower than the SA version's 1 mA, making 7134LA35JI8 optimal for energy-constrained platforms.