Renesas 7134LA20PDG

Overview

7134LA20PDG from Renesas Electronics is a high-speed 4K × 8 dual-port static RAM IC with fully asynchronous operation from either port, 20 ns maximum read cycle time (commercial grade), 1 mW typical standby power, and battery backup data retention down to 2 V - enabling nonvolatile memory hold in power-loss scenarios. It serves as a shared memory buffer between two independent processors or bus domains in real-time embedded control systems.

For engineers reviewing the 7134LA20PDG datasheet, 7134LA20PDG pinout, 7134LA20PDG application, or 7134LA20PDG equivalent, key selection criteria include dual-port contention management, TTL-compatible 5 V ±10% supply operation, industrial-grade temperature support (–40°C to +85°C), and PDIP-48 package compatibility with legacy board layouts.

Technical Context

The 7134LA20PDG implements two independent address/data/control interfaces (Left and Right ports) with separate chip enable (CEL/CER), output enable (OEL/OER), and read/write (R/WL/R/WR) signals - enabling true concurrent access without on-chip arbitration logic. Each port supports full TTL-level signaling and operates asynchronously, requiring external arbitration when both ports access the same memory location.

Its low-power LA variant uses CMOS process technology to achieve 1 mW typical standby current (ISB3) and 200 µA typical data retention current at 2 V, while maintaining 700 mW active power consumption. The device supports battery backup mode exclusively in LA versions and complies with MIL-PRF-38535 QML for military-grade reliability where specified.

Key Specifications

Pinout & Package

7134LA20PDG is housed in a 48-pin plastic dual in-line package (PDG48), measuring approximately 0.55 in × 2.43 in × 0.18 in. All VCC pins must be connected to +5 V supply; all GND pins must be tied to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1352V-20AXC and IDT71V32S20YG8, the 7134LA20PDG uniquely combines 5 V TTL compatibility, 20 ns speed, PDIP-48 footprint, and 2 V data retention - making it irreplaceable in legacy industrial controllers requiring fail-safe memory hold without redesign.

Availability

7134LA20PDG is available at Aetrix Electronics and suitable for real-time motor control, avionics data logging, and industrial PLC I/O mapping requiring stable component supply and long-term obsolescence mitigation.

Supply support for 7134LA20PDG 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 product line - acquired from Integrated Device Technology - delivers high-speed dual-port SRAMs optimized for deterministic, contention-managed shared memory in real-time embedded systems with strict timing and reliability requirements.

FAQ

What is the maximum operating temperature range supported by the 7134LA20PDG?

The 7134LA20PDG is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all DC and AC electrical parameters in the datasheet and applies specifically to the PDG48 package variant with LA (low-power) and 20 ns speed grade. The 7134LA20PDG does not support military or commercial-only temperature ranges - its ordering code "PDG" and "20" confirm industrial-grade PDIP packaging and 20 ns timing.

Does the 7134LA20PDG support true simultaneous read/write operations across both ports?

Yes, the 7134LA20PDG supports fully asynchronous, independent read and write operations on left and right ports - but simultaneous access to the same memory address requires external arbitration to prevent data corruption. The device provides no internal conflict resolution; users must implement external logic (e.g., semaphores or priority encoders) to manage port contention, as confirmed in the Functional Description and Truth Table I sections of the Renesas datasheet for 7134LA20PDG.

What is the minimum supply voltage required to retain data in the 7134LA20PDG during power loss?

The 7134LA20PDG guarantees data retention down to 2.0 V DC on VCC, as specified in the Data Retention Characteristics table (tCDR and VDR parameters). This 2 V threshold enables integration with coin-cell or backup capacitor circuits in systems requiring nonvolatile memory hold during main power interruption - a feature exclusive to LA-series variants like the 7134LA20PDG and not available in SA (standard power) versions.

Can the 7134LA20PDG be used as a direct replacement for the 7134SA20PDG in an existing design?

The 7134LA20PDG is pin-compatible and functionally identical to the 7134SA20PDG in read/write timing and control logic, but differs critically in standby power: LA draws 1 mW typical (ISB3) versus 5 mW for SA. No PCB changes are required, but system-level power validation is recommended due to the LA version's lower ISB1/ISB2 currents and enhanced 2 V data retention - capabilities absent in the SA variant. Both share identical 20 ns timing and PDG48 packaging.

What package type and dimensions does the 7134LA20PDG use?

The 7134LA20PDG uses a 48-pin plastic dual in-line package (PDG48) with body dimensions of approximately 0.55 in × 2.43 in × 0.18 in, as documented in the Pin Configurations section of the Renesas datasheet. This through-hole package supports wave soldering and manual prototyping, and is distinct from SB48 (ceramic DIP), LC48 (LCC), FP48 (flatpack), and PLG52 (PLCC) variants - all of which share the same 7134LA20 functionality but differ mechanically.