Renesas 7134LA20J8

Overview

7134LA20J8 from Renesas Electronics is a high-speed 4K × 8 dual-port static RAM with independent left/right asynchronous ports, 20 ns read cycle time (max), 1 mW typical standby power, and battery backup data retention down to 2 V - designed for real-time inter-processor communication in avionics and industrial control systems.

For engineers reviewing the 7134LA20J8 datasheet, 7134LA20J8 pinout, 7134LA20J8 application, or 7134LA20J8 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-grade temperature operation (–40°C to +85°C), and two rigorously cross-checked alternative parts for dual-port SRAM replacement scenarios.

Technical Context

The 7134LA20J8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A11L/I/O0L–I/O7L/CEL/OEL/R/WL and A0R–A11R/I/O0R–I/O7R/CER/OER/R/WR), enabling concurrent read/write access without on-chip arbitration logic. It uses CMOS process technology and supports TTL-compatible 5 V ±10% supply.

Its low-power LA variant achieves 1 mW typical standby current (ISB3) and retains data at VCC ≥ 2 V, while maintaining 20 ns max read cycle time under commercial conditions. Pin-compatible variants exist across PDG48, PLG52, SB48, LC48, and FP48 packages - this part uses 52-pin PLCC (PLG52).

Key Specifications

Pinout & Package

7134LA20J8 is housed in a 52-pin Plastic Leaded Chip Carrier (PLCC, package code PLG52), body size ≈ 0.75 in × 0.75 in × 0.17 in, with J-lead configuration and pin 1 index marker. All VCC pins require local decoupling; all GND pins must be connected to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 7134LA20J8, CY7C1350V-20AXC offers wider data bus but mandates 3.3 V infrastructure, while IDT71V32S20YG8 provides greater capacity but lacks battery retention and requires layout revision due to non-identical pin mapping - neither is drop-in replaceable.

Availability

7134LA20J8 is available at Aetrix Electronics and suitable for avionics data bridges, industrial PLC dual-CPU interfaces, medical imaging frame buffers, and radar signal processing FIFOs requiring stable component supply across extended product lifecycles.

Supply support for 7134LA20J8 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 - acquired from Integrated Device Technology - was engineered for deterministic, arbitration-free memory sharing in hard real-time systems where latency predictability and data integrity under power disruption are mission-critical.

FAQ

What is the maximum operating temperature range for the 7134LA20J8?

The 7134LA20J8 is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per Renesas' qualification standards and applies across all electrical parameters in the datasheet's "Recommended Operating Temperature and Supply Voltage" table. The 7134LA20J8 does not support military-grade (–55°C to +125°C) operation - that range applies only to SB48 and FP48 packaged variants like 7134LA35CB.

Does the 7134LA20J8 support true simultaneous read/write between ports?

Yes, the 7134LA20J8 permits fully asynchronous read and write operations on left and right ports concurrently. However, it provides no internal arbitration - if both ports access the same memory location simultaneously, data integrity is not guaranteed and external logic must manage contention. The 7134LA20J8 truth table (Table 11) defines valid control combinations, and timing waveforms confirm independent tRC/tWC execution.

What is the minimum supply voltage for data retention on the 7134LA20J8?

The 7134LA20J8 guarantees data retention at VCC ≥ 2.0 V, as specified in Table 7 (Data Retention Characteristics). This feature is exclusive to LA variants and enables operation from backup batteries or supercapacitors during main power failure. Retention current is ≤4000 µA over full industrial temperature range, and tCDR (chip deselect to retention) is instantaneous (0 ns).

Which package type does the 7134LA20J8 use, and what are its key mechanical features?

The 7134LA20J8 uses a 52-pin Plastic Leaded Chip Carrier (PLCC), package code PLG52, with body dimensions approximately 0.75 in × 0.75 in × 0.17 in. It features J-leads for surface-mount reflow compatibility, an index corner marking pin 1, and four no-connect pins (49–52). Thermal and mechanical data confirm suitability for automated assembly and high-reliability applications requiring hermetic sealing options.

How does the 7134LA20J8 differ from the SA version in power consumption?

The 7134LA20J8 consumes 1 mW typical standby power (ISB3), whereas the SA variant draws 5 mW typical in the same condition. Active power is identical (700 mW typ), but LA achieves ultra-low standby via optimized CMOS design enabling 2 V data retention. This makes the 7134LA20J8 preferred for battery-backed systems, while SA suits cost-sensitive commercial applications without retention requirements.