Renesas 7132SA35JI

Overview

IDT7132SA35JI 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 (open-drain), and 35 ns maximum read/write cycle time. It operates at 5V ±10%, supports industrial temperature range (–40°C to +85°C), and enables error-free 16-bit-or-wider memory expansion when paired with IDT7142 SLAVE devices in real-time embedded control systems.

For engineers reviewing the IDT7132SA35JI datasheet, IDT7132SA35JI pinout, IDT7132SA35JI application, or IDT7132SA35JI equivalent, key selection considerations include its master-mode arbitration capability, open-drain BUSY signaling requiring 270Ω pull-up, dual independent port timing (tRC = 35 ns, tWP = 25 ns), and compatibility with 48-pin flatpack (FP48) packaging for high-reliability military/industrial PCB layouts.

Technical Context

The IDT7132SA35JI implements hardware-based port arbitration using address- and chip-enable–driven BUSY assertion logic that resolves simultaneous access contention without external logic. Its two fully asynchronous ports (left/right) each feature independent CE, OE, R/W, address (A0–A10), and I/O (I/O0–I/O7) signals, enabling concurrent read/write operations to distinct memory locations.

As a MASTER-only device, it integrates BUSYL and BUSYR open-drain outputs (requiring external 270Ω pull-ups) and internal arbitration priority setup (tAPS = 5 ns), while IDT7142 SLAVE variants accept BUSY as inputs to inhibit writes. The device uses CMOS process technology, delivers 325 mW typical active power, and enters low-power standby (ISB3 = 0.2 mA typ.) when both CEs are deasserted.

Key Specifications

Pinout & Package

Package: 48-pin Flatpack (FP48), body size ≈ 0.75 in × 0.75 in × 0.11 in, side-braze construction for hermetic reliability and thermal stability in harsh environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7132SA35JI, CY7C1371D-35ZXC offers wider data bus but lacks on-chip arbitration, while IS61LV25616AL-10TLI provides greater capacity and speed yet eliminates hardware contention management - making IDT7132SA35JI uniquely suited for deterministic, low-latency dual-processor memory sharing without firmware overhead.

Availability

IDT7132SA35JI is available at Aetrix Electronics and suitable for real-time digital signal processing, redundant control system memory, and high-speed industrial PLC I/O buffering requiring stable component supply across extended product lifecycles.

Supply support for IDT7132SA35JI 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor signal conditioning ICs for communications, computing, and industrial markets.

IDT7132SA35JI belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic, hardware-arbitrated memory sharing in safety-critical embedded systems where software-managed coherency introduces unacceptable latency or failure risk.

FAQ

What is the function of the BUSY pins on the IDT7132SA35JI?

The BUSYL and BUSYR pins on the IDT7132SA35JI are open-drain outputs used exclusively in MASTER mode to signal port contention. When both ports attempt access to the same memory location, the IDT7132SA35JI asserts BUSY to stall the later-arriving access. External 270Ω pull-up resistors are mandatory for proper logic-level translation and wired-OR expansion with multiple MASTER/SLAVE arrays.

Can the IDT7132SA35JI operate in a standalone configuration without an IDT7142 SLAVE device?

Yes, the IDT7132SA35JI functions as a complete 2K × 8 dual-port SRAM in standalone mode. Its on-chip arbitration logic, BUSY outputs, and independent left/right control lines enable full 8-bit memory access on both ports without external components. The IDT7142 SLAVE is only required when expanding data width beyond 8 bits (e.g., 16-bit systems), not for basic dual-port operation.

What package type is used for the IDT7132SA35JI, and why is it suitable for industrial applications?

IDT7132SA35JI uses a 48-pin Flatpack (FP48) package with approximate dimensions of 0.75 in × 0.75 in × 0.11 in and side-braze construction. This hermetically sealed ceramic package provides superior thermal conductivity, mechanical robustness against vibration, and long-term reliability under thermal cycling - meeting requirements for industrial control, avionics, and military platforms where plastic DIP or PLCC packages would risk solder joint fatigue or moisture ingress.

How does the IDT7132SA35JI handle power management during inactive periods?

IDT7132SA35JI implements four graded standby modes controlled by CE and input voltage levels. With both CEL and CER high (VIH), ISB3 drops to 0.2 mA typical when all inputs are at CMOS levels - ideal for battery-backed retention. In TTL-level standby (ISB1), current is 25 mA typical. Power-down is automatic and instantaneous, requiring no command sequence or register programming.

Is the IDT7132SA35JI pin-compatible with faster or slower speed grades in the same family?

Yes, all IDT7132SA/LA speed variants (20/25/35/55/100 ns) share identical FP48 pinout, electrical interface, and functional behavior. Timing parameters scale accordingly - e.g., IDT7132SA35JI supports tRC = 35 ns, while IDT7132SA25JI supports 25 ns - allowing design reuse across performance tiers without PCB redesign or firmware changes.