Renesas 7132LA35J8

Overview

IDT7132LA35J8 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 delivers 35ns max read cycle time for industrial-temperature applications in flatpack packaging.

For engineers reviewing the IDT7132LA35J8 datasheet, IDT7132LA35J8 pinout, IDT7132LA35J8 application, or IDT7132LA35J8 equivalent, key selection considerations include its master-mode arbitration capability, open-drain BUSY outputs requiring 270Ω pull-up, 1μA full-standby current (ISB3), and compatibility with IDT7142 slave devices for 16-bit+ memory expansion.

Technical Context

The IDT7132LA35J8 implements hardware-based port arbitration using address and chip-enable inputs to assert BUSYL/BUSYR outputs-open-drain signals that indicate contention when both ports access the same memory location simultaneously. Its arbitration logic ignores read/write direction and triggers BUSY based solely on timing alignment of address and CE transitions.

This device integrates two fully independent 2K × 8 memory arrays with separate control, address, and I/O buses per port. It features automatic power-down via CE-driven standby modes (ISB1–ISB4), TTL-compatible signaling, and CMOS fabrication enabling 325mW typical active power consumption while maintaining 2V data retention in LA variants.

Key Specifications

Pinout & Package

48-pin flatpack (FP48) package with 0.75″ × 0.75″ × 0.11″ body dimensions; requires connection of all VCC and GND pins per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1371DV33-166AXC and IDT7142LA35J8, the IDT7132LA35J8 uniquely combines master-mode arbitration, 2V data retention, and industrial temperature support in a single 5V-compatible device-enabling simpler, more robust dual-processor memory architectures without voltage translation or external logic.

Availability

IDT7132LA35J8 is available at Aetrix Electronics and suitable for real-time signal processing, dual-CPU interprocessor communication, and industrial motion control applications requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial-temperature performance.

Supply support for IDT7132LA35J8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT7132/7142 family was designed specifically for deterministic, low-latency shared-memory applications in dual-processor, real-time control, and avionics systems-emphasizing hardware arbitration, battery backup, and ruggedized packaging.

FAQ

What is the function of BUSYL and BUSYR on the IDT7132LA35J8?

BUSYL and BUSYR are open-drain outputs on the IDT7132LA35J8 indicating port contention when both left and right ports attempt simultaneous access to the same memory address. They require external 270Ω pull-up resistors and are used to stall one port's write operation until the other completes. These signals are not present on slave devices like IDT7142LA35J8, where BUSY pins serve as inputs instead.

Does the IDT7132LA35J8 support true 35ns access time across its full industrial temperature range?

Yes, the IDT7132LA35J8 guarantees a maximum 35ns read cycle time (tRC) over the full –40°C to +85°C industrial temperature range when operated at VCC = 4.5V to 5.5V. This specification is validated per AC Electrical Characteristics Table 08a and applies to all supported packages including the FP48 variant used in IDT7132LA35J8.

Can the IDT7132LA35J8 operate without external pull-up resistors on BUSY pins?

No, the IDT7132LA35J8 BUSYL and BUSYR pins are open-drain outputs and will not function correctly without external 270Ω pull-up resistors to VCC, as explicitly stated in datasheet Note 1 and Figure 3. Omitting these resistors results in undefined BUSY logic levels and potential data corruption during port contention.

How does the IDT7132LA35J8 achieve 2V data retention?

The IDT7132LA35J8 achieves 2V data retention through optimized CMOS cell design and low-leakage circuitry in its LA-series variant. When main VCC drops below 4.5V, the device enters data retention mode if CE is deasserted and VCC remains ≥2.0V, drawing ≤4mA (typical) to preserve memory contents-verified per DC Electrical Characteristics Table 06.

Is the IDT7132LA35J8 pin-compatible with other speed grades in the 7132LA family?

Yes, all IDT7132LA variants-including IDT7132LA25J8, IDT7132LA35J8, IDT7132LA55J8, and IDT7132LA100J8-share identical FP48 pinouts and electrical interfaces. Speed grade differences affect only timing parameters (e.g., tRC, tAA); no PCB layout changes are needed when upgrading or downgrading within the LA series.