Renesas 7133SA35G

Overview

7133SA35G from IDT (Integrated Device Technology) is a high-speed 2K × 16 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, BUSY output flag (open-drain), and separate upper/lower byte write controls per port. It supports 35 ns max read cycle time, operates at 5.0 V ±10%, and enables error-free 32-bit+ bus expansion when paired with IDT7143 SLAVE devices in industrial/military systems.

For engineers reviewing the 7133SA35G datasheet, 7133SA35G pinout, 7133SA35G application, or 7133SA35G equivalent, this page delivers verified timing specs (tRC = 35 ns), power behavior (1150 mW active / 5 mW standby), dual-port arbitration details, battery backup capability (2 V data retention), and precise 68-pin PLCC package mapping - all critical for real-time embedded memory subsystem design.

Technical Context

The 7133SA35G implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves simultaneous access to identical memory locations by asserting BUSYL/BUSYR outputs and gating conflicting writes - a hardware-enforced contention resolution mechanism unique to the MASTER variant.

It supports TTL-compatible signaling, single 5 V supply, and features separate R/WLUB/R/WLLB and R/WRUB/R/WRLB controls for byte-level write granularity per port. The open-drain BUSY outputs require external pull-up resistors and are used to stall host processors during arbitration, enabling deterministic real-time response in multi-CPU systems.

Key Specifications

Pinout & Package

7133SA35G is packaged in a 68-pin PLCC (PLG68), with body dimensions ≈ 0.95 in × 0.95 in × 0.17 in. Both VCC pins must be connected to 5 V supply and both GND pins to ground for reliable operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-35JC and IDT7143SA35G, the 7133SA35G uniquely integrates arbitration logic and open-drain BUSY outputs - delivering hardware-enforced, zero-software-overhead contention resolution essential for safety-critical and real-time deterministic systems.

Availability

7133SA35G is available at Aetrix Electronics and suitable for radar signal processing, avionics flight control interfaces, and secure bootloader memory systems requiring stable component supply across extended product lifecycles.

Supply support for 7133SA35G 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

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT7133 family was designed specifically for deterministic, dual-processor memory sharing in military, aerospace, and industrial real-time systems - emphasizing hardware arbitration, wide temperature operation, and robust 5 V compatibility.

FAQ

What is the maximum operating temperature range for the 7133SA35G?

The 7133SA35G is rated for the military temperature range of −55°C to +125°C and is manufactured in compliance with MIL-PRF-38535 QML. This makes it suitable for deployment in harsh environments such as airborne radar systems, missile guidance electronics, and downhole oilfield instrumentation where extended thermal stability is mandatory. The 7133SA35G maintains full functionality and timing compliance across this entire range.

Does the 7133SA35G support battery backup operation?

Yes, the 7133SA35G supports battery backup operation with guaranteed data retention at VCC = 2.0 V. In LA variants, this mode draws only ~100 µA typical current, but the SA version (including 7133SA35G) retains data at 2 V with ISB3 ≤ 1.0 mA. This capability enables use in systems requiring nonvolatile memory preservation during main power failure - such as secure boot key storage or last-known-state logging in test equipment.

How does the BUSY arbitration logic work in the 7133SA35G?

The 7133SA35G's BUSY logic asserts BUSYL or BUSYR when both ports attempt simultaneous access to the same memory address. As a MASTER device, it gates the write signal on the contending port and outputs the BUSY flag (open-drain) to stall the host. This hardware arbitration eliminates race conditions without software intervention. The 7133SA35G is the only device in the family with this internal arbitration capability - SLAVE parts like 7143SA35G accept BUSY as an input only.

Can the 7133SA35G be used as a standalone dual-port RAM without a SLAVE device?

Yes, the 7133SA35G functions fully as a standalone 16-bit dual-port SRAM with complete left/right port independence, on-chip arbitration, and BUSY signaling. Its SLAVE pairing capability with IDT7143 devices is optional and used only when expanding data bus width beyond 16 bits (e.g., to 32 or 64 bits). Standalone operation requires no external components beyond pull-up resistors on BUSY pins and standard decoupling capacitors.

What package types are available for the 7133SA35G?

The 7133SA35G is available in multiple packages including 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), 68-pin PLCC (PLG68), and 100-pin TQFP (PNG100). The "G" suffix in 7133SA35G specifically denotes the 68-pin PLCC (PLG68) variant. All packages share identical pinouts and electrical specifications, allowing drop-in substitution based on board layout and thermal requirements - with PLCC offering ease of inspection and rework in high-reliability assemblies.