Renesas 7133LA25G

Overview

7133LA25G from IDT (now Renesas) is a high-speed 2K × 16-bit dual-port static RAM with independent left/right ports, 25 ns max read cycle time, industrial temperature range (–40°C to +85°C), and low-power LA variant consuming 1050 mW active / 1 mW standby power. It serves as a MASTER device with on-chip arbitration logic and open-drain BUSY output for contention management in real-time multiprocessing systems.

For engineers reviewing the 7133LA25G datasheet, 7133LA25G pinout, 7133LA25G application, or 7133LA25G equivalent, this page delivers verified electrical specs, byte-selectable write control per port, battery backup data retention at 2 V, TTL-compatible 5 V ±10% operation, and precise timing parameters for synchronous multi-CPU memory sharing.

Technical Context

The 7133LA25G implements fully asynchronous dual-port architecture with separate address, control, and I/O buses for left and right ports-enabling concurrent read/write access to any memory location without internal synchronization overhead. Its on-chip arbitration logic resolves port-to-port address contention by asserting BUSYL/BUSYR flags and gating writes on the contended side.

As a MASTER device, it features open-drain BUSY outputs requiring external pull-up resistors, while supporting width expansion via SLAVE IDT7143LA devices. The LA variant integrates CMOS low-power design enabling 2 V data retention and sub-1 mA standby current-critical for battery-backed systems where power integrity during brownout must be preserved.

Key Specifications

Pinout & Package

7133LA25G is packaged in a 68-pin PLCC (PLG68) with 0.95″ × 0.95″ footprint and 0.17″ height. Both VCC and GND pins are duplicated for noise immunity and reliable power distribution across high-speed switching I/Os.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362V-25AXI and 7143LA25G, the 7133LA25G uniquely integrates hardware arbitration and MASTER functionality-enabling deterministic, zero-software-overhead dual-CPU memory sharing without external components or timing-critical FPGA logic.

Availability

7133LA25G is available at Aetrix Electronics and suitable for industrial motion control, avionics data buffering, and medical imaging frame store applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 7133LA25G 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), now part of Renesas Electronics, is a semiconductor leader specializing in high-performance memory, timing, and interface solutions for demanding real-time systems.

The 7133LA25G belongs to IDT's dual-port SRAM product line, engineered specifically for deterministic multi-processor memory sharing in industrial automation, aerospace, and medical equipment where hardware arbitration and battery backup are mandatory.

FAQ

What is the function of the BUSY pin on the 7133LA25G?

The BUSY pin on the 7133LA25G is an open-drain output that signals port contention when both left and right ports attempt simultaneous access to the same memory address. It stalls the contended port's write operation until the other port completes its cycle. External pull-up resistors are required for proper logic-level assertion, and the signal can be used directly as an interrupt source or to gate CPU write strobes in real-time systems.

Can the 7133LA25G operate with a 3.3 V supply?

No, the 7133LA25G requires a 5.0 V ±10% supply (4.5–5.5 V) and is TTL-compatible-not 3.3 V compatible. Its input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive levels (VOH = 2.4 V min at –4 mA) are specified only for 5 V operation. Using 3.3 V will violate DC operating conditions and result in unreliable read/write behavior or data corruption.

How does the 7133LA25G differ from the 7143LA25G?

The 7133LA25G is the MASTER device with on-chip arbitration logic and BUSY outputs, while the 7143LA25G is the SLAVE device with BUSY inputs and no arbitration circuitry. They share identical pinouts and timing, but only the 7133LA25G can resolve contention autonomously. In width-expanded systems, one 7133LA25G coordinates multiple 7143LA25G units-making them complementary, not interchangeable.

Does the 7133LA25G support battery backup operation?

Yes, the 7133LA25G supports battery backup with guaranteed data retention at VCC = 2.0 V (minimum), drawing only 100–4000 µA depending on temperature grade. This enables seamless operation during main power loss in medical, telecom, and industrial systems-preserving configuration, calibration, or state data without volatile refresh.

What package options are available for the 7133LA25G?

The 7133LA25G is offered in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100). The PLCC variant is most commonly stocked and supports reflow soldering; all packages maintain identical pinout and electrical specifications-allowing direct substitution based on board layout and thermal requirements.