Renesas 7130LA100P

Overview

7130LA100P from IDT (Integrated Device Technology) is a high-speed 1K × 8 dual-port static RAM with master arbitration logic, 100ns maximum read/write cycle time, 2V data retention capability, and TTL-compatible 5V ±10% operation - used in real-time interprocessor communication systems requiring concurrent access without external logic.

For engineers reviewing the 7130LA100P datasheet, 7130LA100P pinout, 7130LA100P application, or 7130LA100P equivalent, key selection criteria include bus contention arbitration timing (tBAA/tBDD), dual-port standby current (ISB3 = 0.2mA typ.), battery-backed data retention at 2V, and compatibility with IDT7140LA slave devices in 16-bit memory expansion.

Technical Context

The 7130LA100P implements on-chip port arbitration logic to resolve simultaneous access conflicts between left and right ports, using BUSYL/BUSYR open-drain outputs with required pull-up resistors. It supports fully asynchronous operation from either port with independent CE, OE, and R/W controls per side.

It features automatic power-down via chip enable (CE), delivering ultra-low ISB3 = 0.2mA typical full-standby current under CMOS-level inputs, and guarantees 2V data retention for battery backup applications - a capability exclusive to LA-grade variants and not present in SA versions.

Key Specifications

Pinout & Package

7130LA100P is packaged in a 48-pin ceramic flatpack (FP48), measuring approximately 0.75″ × 0.75″ × 0.11″, with all VCC and GND pins requiring direct connection to respective supply rails.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C131-100AXC and IDT7140LA100P, the 7130LA100P uniquely integrates arbitration, interrupt, and battery-retention - making it the sole choice for self-contained dual-processor communication where deterministic conflict resolution and zero-refresh backup are mandatory.

Availability

7130LA100P is available at Aetrix Electronics and suitable for real-time interprocessor communication, avionics data concentrators, and battery-backed telemetry loggers requiring stable component supply across extended product lifecycles.

Supply support for 7130LA100P 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 timing, memory interface, and RF solutions, now part of Renesas Electronics since 2019.

The IDT7130/7140 family was designed specifically for deterministic dual-processor systems requiring hardware-managed memory contention, low-power battery backup, and seamless 16-bit expansion - targeting military, industrial, and telecom infrastructure.

FAQ

What is the guaranteed data retention voltage for the 7130LA100P?

The 7130LA100P guarantees data retention down to 2.0V (VDR), as specified in Table 7 of the datasheet. This feature is exclusive to LA-grade variants and enables reliable operation from backup batteries without external retention circuitry. The 7130LA100P maintains stored data indefinitely at this voltage under specified temperature conditions, making it suitable for mission-critical logging applications where main power may fail unexpectedly.

Does the 7130LA100P support true simultaneous read/write operations on both ports?

Yes, the 7130LA100P supports fully asynchronous concurrent access: one port can read while the other writes to different addresses without interference. However, when both ports access the same address, on-chip arbitration asserts BUSYL or BUSYR to block the later-arriving write, ensuring data integrity. This behavior is defined in Truth Table III and timing diagrams DRW12–DRW15, and requires external pull-up resistors on BUSY pins.

What package type is used for the 7130LA100P, and what are its mechanical dimensions?

The 7130LA100P uses a 48-pin ceramic flatpack (FP48) package, with body dimensions of approximately 0.75 inch × 0.75 inch × 0.11 inch, as documented in Note 3 of the Pin Configurations section. This hermetically sealed package meets MIL-PRF-38535 QML requirements and is rated for industrial temperature operation (–40°C to +85°C). Pin 1 is identified by a notch or dot per standard FP48 marking convention.

How does the 7130LA100P differ from the 7140LA100P in system architecture?

The 7130LA100P is the MASTER device with on-chip arbitration logic, BUSY outputs, and INT flag generation, while the 7140LA100P is the SLAVE device with BUSY inputs only and no arbitration capability. In a 16-bit system, one 7130LA100P controls two 7140LA100Ps - the 7130LA100P handles priority resolution and interrupt signaling, whereas 7140LA100P provides additional memory width without arbitration overhead.

What is the minimum arbitration priority setup time (tAPS) required for reliable BUSY assertion in the 7130LA100P?

The 7130LA100P requires a minimum arbitration priority setup time (tAPS) of 5ns, as specified in Table 11a and 11b. This parameter defines the minimum time address stability must precede chip enable assertion to guarantee deterministic BUSY flag activation during contention. Failure to meet tAPS may result in indeterminate BUSY assertion - either BUSYL or BUSYR could activate - compromising system predictability in safety-critical applications.