Renesas 7132LA70JI

Overview

IDT7132LA70JI from Integrated Device Technology (IDT) is a high-speed 2K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, BUSY output flag, and battery-backed data retention at 2V. It supports independent asynchronous read/write access on left and right ports, operates on single 5V ±10% supply, and targets real-time inter-processor communication in industrial control systems requiring deterministic memory arbitration.

For engineers reviewing the IDT7132LA70JI datasheet, IDT7132LA70JI pinout, IDT7132LA70JI application, or IDT7132LA70JI equivalent, key selection considerations include its 70 ns read cycle time, 1 μA full-standby current (ISB3), open-drain BUSY outputs requiring 270 Ω pull-up, industrial temperature range (–40°C to +85°C), and master/slave expansion capability for 16-bit+ word width systems.

Technical Context

The IDT7132LA70JI implements hardware-based port arbitration using address and chip-enable inputs to assert BUSYL/BUSYR outputs when concurrent accesses target identical memory locations. Its arbitration logic ignores R/W polarity and triggers BUSY before write pulse initiation, enforcing strict timing constraints (tAPS = 5 ns minimum) to prevent data corruption during master/slave cascading.

This device integrates two fully independent TTL-compatible ports-each with dedicated A0–A10 address lines, I/O0–I/O7 bidirectional data buses, and separate CE/OE/R/W controls-enabling simultaneous CPU-to-DSP or FPGA-to-microcontroller memory sharing without external glue logic or clock synchronization.

Key Specifications

Pinout & Package

Package: 48-pin Flatpack (FP48), ceramic side-braze construction, body dimensions 0.75 in × 0.75 in × 0.11 in, compliant with MIL-PRF-38535 QML Class V.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7132LA70JI, the Cypress and ISSI alternatives offer higher density or lower voltage operation but omit integrated BUSY arbitration-requiring additional design effort to replicate deterministic contention resolution in real-time systems.

Availability

IDT7132LA70JI is available at Aetrix Electronics and suitable for industrial PLCs, avionics sensor modules, dual-CPU communication interfaces, and test equipment pattern memory requiring stable component supply, long-term obsolescence management, and MIL-spec traceability.

Supply support for IDT7132LA70JI 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

Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor signal conditioning solutions before its acquisition by Renesas Electronics in 2019.

IDT7132LA70JI belongs to the IDT7132/7142 dual-port SRAM family, designed specifically for deterministic inter-processor communication in real-time industrial, military, and aerospace systems where hardware arbitration and data retention are mandatory.

FAQ

What is the guaranteed data retention voltage for IDT7132LA70JI?

IDT7132LA70JI guarantees data retention down to 2.0 V on VCC, as specified in Table 6 of the datasheet. This enables reliable operation during brown-out conditions using backup power sources such as lithium coin cells or supercapacitors, with ICCDR limited to 100 µA typical at 25°C.

Does IDT7132LA70JI support true simultaneous read/write operations on both ports?

IDT7132LA70JI supports independent asynchronous access on left and right ports, but simultaneous writes to the same memory address trigger BUSY arbitration. When contention occurs, the earlier port wins and the later port's write is internally inhibited-ensuring deterministic behavior without data corruption.

What is the required pull-up resistance for BUSYL and BUSYR on IDT7132LA70JI?

IDT7132LA70JI requires a 270 Ω pull-up resistor on each BUSY output (Pins 8 and 44), as explicitly stated in Note 2 of the Features section and Figure 3 of the datasheet. This value ensures proper logic-high level under worst-case sink current conditions.

Can IDT7132LA70JI operate in commercial temperature range instead of industrial?

IDT7132LA70JI is specifically rated for industrial temperature range (–40°C to +85°C). The "I" suffix in the part number denotes industrial grade; commercial-grade variants (e.g., IDT7132LA70J) exist but are distinct orderables with different qualification and screening.

Is IDT7132LA70JI pin-compatible with IDT7142LA70JI?

No-IDT7132LA70JI (MASTER) and IDT7142LA70JI (SLAVE) share identical pinouts and package footprints but differ functionally: BUSYL/BUSYR are open-drain outputs on the 7132 and inputs on the 7142. They are designed for complementary use in width-expansion configurations, not direct substitution.