Renesas 7130LA20JG8

Overview

7130LA20JG8 from IDT (Integrated Device Technology) is a high-speed 1K × 8 dual-port static RAM with master arbitration logic, 20 ns max read cycle time, 1 mW typical standby power, and 2 V data retention capability. It supports fully asynchronous dual-port access and is used in real-time inter-processor communication systems requiring deterministic contention resolution.

For engineers reviewing the 7130LA20JG8 datasheet, 7130LA20JG8 pinout, 7130LA20JG8 application, or 7130LA20JG8 equivalent, this page delivers verified timing parameters, BUSY/INT arbitration behavior, battery-backed retention specs, and direct alternative part comparisons for embedded control and military-grade memory subsystems.

Technical Context

The 7130LA20JG8 implements on-chip port arbitration logic to resolve simultaneous access to the same memory location, asserting open-drain BUSYL/BUSYR outputs that require external pull-up resistors. Its MASTER functionality enables seamless expansion with IDT7140 SLAVE devices without discrete glue logic.

It operates at 5.0 V ±10% with TTL-compatible inputs, supports independent left/right port control (CEL/OEL/R/WL vs CER/OER/R/WR), and enters ultra-low-power retention mode at 2 V - a feature exclusive to LA-grade variants and confirmed for this specific speed grade and package.

Key Specifications

Pinout & Package

48-pin ceramic flatpack (FP48, JG8 code), body size ≈ 0.75 in × 0.75 in × 0.11 in, with 2×24 staggered pin layout and defined GND/VCC distribution per manufacturer diagram.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C131-25JC and IDT7140LA20JG8, the 7130LA20JG8 uniquely combines 20 ns speed, 2 V data retention, and autonomous MASTER arbitration - making it irreplaceable in single-chip deterministic inter-processor interfaces requiring military-grade reliability.

Availability

7130LA20JG8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, redundant control system buffering, and military avionics data exchange requiring stable component supply across extended product lifecycles.

Supply support for 7130LA20JG8 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) was a fabless semiconductor company specializing in high-performance memory, timing, and interface solutions before its acquisition by Renesas Electronics in 2019.

The IDT7130 family was designed specifically for deterministic dual-port memory applications in embedded control, aerospace, and industrial systems where hardware arbitration and data retention are mandatory.

FAQ

What is the guaranteed maximum access time for the 7130LA20JG8?

The 7130LA20JG8 has a guaranteed maximum read cycle time (tRC) of 20 ns across the full industrial temperature range (–40°C to +85°C), as specified in Table 09a of the official IDT datasheet revision Jul.12.21. This value applies to both ports under worst-case voltage (4.5 V) and temperature conditions, and is measured with standard AC test loads.

Does the 7130LA20JG8 support true dual-port simultaneous read/write operations?

Yes, the 7130LA20JG8 supports fully asynchronous dual-port operation: one port can read while the other writes to a different memory location. When both ports access the same address, on-chip arbitration asserts BUSYL or BUSYR to inhibit the later-arriving write - ensuring deterministic behavior without external logic. This is confirmed in Truth Table III and timing diagrams drw 12–15.

What is required to use the BUSY and INT outputs of the 7130LA20JG8?

The BUSYL, BUSYR, INTL, and INTR pins on the 7130LA20JG8 are open-drain outputs and require external pull-up resistors to VCC (typically 4.7 kΩ). Without pull-ups, these signals cannot drive HIGH and will remain indeterminate, preventing proper arbitration and interrupt signaling. This requirement is explicitly noted in datasheet Footnote 1 and Figure 3.

Can the 7130LA20JG8 retain data at 2 V, and under what conditions?

Yes, the 7130LA20JG8 guarantees data retention at VCC = 2.0 V (minimum), as documented in Table 07. This applies only to LA-grade parts, requires CE ≥ VCC – 0.2 V (full standby), and is validated at TA = +25°C. The retention current is ≤4000 µA for military/industrial grades, enabling reliable battery backup operation during main power loss.

How does the 7130LA20JG8 differ from the IDT7140LA20JG8?

The 7130LA20JG8 is the MASTER device with on-chip arbitration logic and open-drain BUSY/INT outputs, while the IDT7140LA20JG8 is the SLAVE device with BUSY/INT inputs and no arbitration circuitry. They share identical timing, retention, and packaging but are not interchangeable: 7130LA20JG8 must be used as the controlling port in MASTER/SLAVE configurations, as stated in the Functional Block Diagram and Description sections.