Renesas 7134SA70J

Overview

7134SA70J 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, TTL-compatible 5V ±10% operation, and military-grade temperature range (–55°C to +125°C). It enables concurrent memory access in real-time arbitration-free systems such as radar signal processors and avionics data buffers.

For engineers reviewing the 7134SA70J datasheet, 7134SA70J pinout, 7134SA70J application, or 7134SA70J equivalent, this page delivers verified specifications, validated package mapping, confirmed dual-port timing behavior, and two rigorously cross-checked alternative parts for military-qualified SRAM replacement scenarios.

Technical Context

The 7134SA70J implements fully asynchronous dual-port architecture with separate address, control, and bidirectional 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 contention management.

It supports battery-backed data retention only in LA variants; the SA variant prioritizes speed and power efficiency over retention, delivering 700 mW typical active power and 1.0 mA full standby current (ISB3) under CMOS-level inputs at VCC = 5V.

Key Specifications

Pinout & Package

7134SA70J is packaged in a 48-pin sidebraze DIP (SB48), measuring approximately 0.62 in × 2.43 in × 0.15 in, with all VCC and GND pins requiring direct connection to respective supply rails per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 7134SA70J, the 7134SA55CB offers faster access for latency-critical signal chains, while the 7134SA70L48B retains identical timing and reliability in a space-efficient ceramic LCC-neither requires schematic or firmware changes, only mechanical adaptation.

Availability

7134SA70J is available at Aetrix Electronics and suitable for radar signal processing, avionics data buffering, and secure communications crypto engines requiring stable component supply across extended military lifecycle programs.

Supply support for 7134SA70J 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 aerospace markets.

The IDT7134 family-including 7134SA70J-was designed specifically for high-reliability dual-access memory applications in defense electronics where deterministic timing, radiation tolerance, and long-term obsolescence management are mandatory.

FAQ

What is the maximum operating temperature range for the 7134SA70J?

The 7134SA70J is rated for –55°C to +125°C ambient operation and is manufactured to MIL-PRF-38535 QML standards. This military-grade temperature range ensures reliable functionality in harsh environments such as aircraft bays, missile guidance sections, and satellite payloads where thermal extremes are routine. The 7134SA70J maintains its 70 ns read cycle time and 1.0 mA ISB3 standby current across the full range.

Does the 7134SA70J support battery backup data retention?

No, the 7134SA70J does not support battery backup data retention. That feature is exclusive to the LA variant (e.g., 7134LA70CB). The 7134SA70J is optimized for speed and power efficiency in active operation, offering 70 ns access and 700 mW typical active power, but lacks the 2V data retention capability found in LA parts. For retention-critical applications, select an LA-series part instead of the 7134SA70J.

Which package type is used by the 7134SA70J?

The 7134SA70J uses the 48-pin sidebraze DIP (SB48) package-a hermetically sealed, leaded ceramic package compliant with MIL-STD-883. Its dimensions are approximately 0.62 in × 2.43 in × 0.15 in. This package provides superior thermal stability, EMI shielding, and long-term reliability compared to plastic DIPs, making it ideal for mission-critical military deployments where environmental resilience is non-negotiable.

Can both ports of the 7134SA70J perform simultaneous read operations?

Yes, the 7134SA70J supports fully independent simultaneous read operations on both ports-as long as addresses differ or proper external arbitration prevents contention. Each port has dedicated address, control, and I/O lines, enabling concurrent access without internal bus conflicts. However, simultaneous access to the same memory location from both ports is undefined and requires external logic to ensure data integrity; the 7134SA70J itself does not resolve contention.

What is the standby current consumption of the 7134SA70J under full power-down conditions?

Under full standby (ISB3 condition), where both CEL and CER are held above VCC − 0.2 V with CMOS-level inputs and zero frequency, the 7134SA70J consumes 1.0 mA typical current. This ultra-low standby state is critical for battery-backed subsystems or intermittent-operation platforms where minimizing quiescent power between bursts of activity directly extends operational life-without requiring additional voltage regulators or sleep controllers.