Renesas 7134LA70J

Overview

IDT7134LA70J from Renesas Electronics is a high-speed 4K × 8 dual-port static RAM with independent asynchronous left/right ports, 70 ns maximum read cycle time, 2 V data retention capability (LA version only), and TTL-compatible 5 V ±10% operation-used in real-time digital signal processors, military avionics arbitration systems, and dual-CPU shared-memory architectures.

For engineers reviewing the 7134LA70J datasheet, 7134LA70J pinout, 7134LA70J application, or 7134LA70J equivalent, this page delivers verified timing specs, military-grade package options (SB48 sidebraze DIP), battery backup support, and direct alternative part comparisons for dual-port SRAM selection in contention-tolerant embedded systems.

Technical Context

The 7134LA70J implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling simultaneous read/write access without on-chip arbitration logic. It supports external contention management via CE, OE, and R/W controls on both ports.

Its LA variant features 2 V data retention mode with ≤4 mA full-standby current (ISB3) at military temperature range (–55°C to +125°C), and uses CMOS process technology to achieve 700 mW typical active power dissipation while maintaining TTL-level input/output compatibility.

Key Specifications

Pinout & Package

7134LA70J is supplied in the 48-pin SB48 sidebraze ceramic DIP package (0.62 in × 2.43 in × 0.15 in body), rated for military temperature operation and compliant with MIL-PRF-38535 QML Class V. All VCC and GND pins must be externally decoupled per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-70AXC and AS7C34098B-70TIN, the 7134LA70J uniquely combines military QML qualification, 2 V data retention, and native 5 V TTL compatibility-making it irreplaceable in certified avionics and defense electronics where power resilience and interface fidelity are non-negotiable.

Availability

7134LA70J is available at Aetrix Electronics and suitable for military avionics, radar signal processing, and dual-CPU embedded systems requiring stable component supply across extended lifecycle programs.

Supply support for 7134LA70J 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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The IDT7134 family was originally developed by Integrated Device Technology (acquired by Renesas in 2019) to serve high-reliability dual-port memory needs in military and aerospace systems demanding deterministic timing and power-fail resilience.

FAQ

What is the maximum operating temperature range for the 7134LA70J?

The 7134LA70J is rated for –55°C to +125°C ambient operation and is manufactured to MIL-PRF-38535 QML Class V standards. This military-grade temperature range ensures reliable functionality in harsh environments such as aircraft engine bays, missile guidance sections, and satellite payload modules where thermal cycling exceeds commercial or industrial limits. The 7134LA70J maintains full 70 ns timing performance across this entire range.

Does the 7134LA70J support true dual-port contention resolution?

No-the 7134LA70J does not include on-chip arbitration logic. It provides fully independent left and right ports with separate CE, OE, and R/W controls, requiring external circuitry or software protocol to manage simultaneous access to the same memory location. The 7134LA70J's design assumes the system-level responsibility for data integrity during contention, making it ideal for applications where deterministic arbitration is implemented outside the memory device.

Can the 7134LA70J retain data at 2 V indefinitely?

The 7134LA70J guarantees data retention at VCC ≥ 2.0 V, with ICCDR ≤ 4000 µA (military grade) under those conditions. However, retention time depends on temperature and leakage; the datasheet specifies no minimum duration-only that data remains valid while VCC stays ≥2 V. For long-term hold, system designers must ensure battery voltage regulation and thermal management, as the 7134LA70J itself does not include voltage monitoring or refresh logic.

Which package types are available for the 7134LA70J?

The 7134LA70J is offered exclusively in the 48-pin SB48 sidebraze ceramic DIP package, as confirmed in the Renesas ordering information table. This hermetic, leaded package meets MIL-PRF-38535 requirements for moisture resistance, thermal stability, and mechanical robustness. Unlike earlier SA variants or commercial LA versions, the 7134LA70J does not ship in PLCC, LCC, or plastic DIP configurations-only SB48 for military temperature compliance.

How does the 7134LA70J differ from the 7134SA70J?

The 7134LA70J and 7134SA70J share identical speed (70 ns), package (SB48), and temperature rating (–55°C to +125°C), but differ critically in power behavior: the LA version draws only 0.2 mA typical in full standby (ISB3) and supports 2 V data retention, whereas the SA version consumes 1.0 mA typical in ISB3 and lacks battery backup capability. Both use the same pinout and timing, but LA is mandatory for power-fail resilience in mission-critical systems.