Renesas 7132SA100C

Overview

7132SA100C from 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 100 ns maximum read/write cycle time. It operates at 5V ±10%, supports independent asynchronous access on left/right ports, and targets real-time inter-processor communication in embedded control systems.

For engineers reviewing the 7132SA100C datasheet, 7132SA100C pinout, 7132SA100C application, or 7132SA100C equivalent, this page delivers verified timing parameters (tRC = 100 ns, tWP = 55 ns), power specs (ISB1 = 20 mA typ.), BUSY arbitration behavior, and exact package mapping for the 48-pin DIP variant.

Technical Context

The 7132SA100C implements hardware-based port arbitration using address and chip-enable signals to detect simultaneous access to identical memory locations. Its BUSY outputs (BUSYL/BUSYR) are open-drain and require 270 Ω pull-up resistors - asserted low when contention occurs, blocking writes on the contending port.

This MASTER-only device integrates arbitration logic and BUSY generation internally; it does not accept external BUSY inputs. When paired with IDT7142 SLAVE devices for width expansion, the 7132SA100C drives BUSY signals that inhibit writes on slave ports, enabling error-free 16-bit+ memory systems without external logic.

Key Specifications

Pinout & Package

7132SA100C is packaged in a 48-pin plastic dual in-line package (PDG48), with 0.6-inch width and 2.43-inch length. Pin 1 is index-marked; all VCC (pins 24, 48) and GND (pins 1, 25) connections must be externally decoupled.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-100AXC, the 7132SA100C eliminates external arbitration components and guarantees deterministic contention resolution; compared with IDT7142SA100C, it provides essential MASTER functionality including BUSY output generation and internal arbitration - making it irreplaceable in standalone dual-processor interfaces.

Availability

7132SA100C is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal processing buffering, and military avionics data exchange requiring stable component supply across extended product lifecycles.

Supply support for 7132SA100C 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 high-performance memory, timing, and interface solutions for communications, computing, and industrial markets.

The IDT7132/7142 family was designed specifically for deterministic, low-latency inter-processor communication in safety-critical and real-time embedded systems - emphasizing hardware arbitration, predictable timing, and QML-compliant reliability.

FAQ

What is the function of BUSYL and BUSYR on the 7132SA100C?

BUSYL and BUSYR are open-drain outputs on the 7132SA100C that assert low when port contention is detected - i.e., when both left and right ports attempt access to the same memory address simultaneously. Each pin corresponds to its respective port and requires a 270 Ω pull-up resistor to VCC. The 7132SA100C uses these signals to internally inhibit writes on the contending port, preventing data corruption. This arbitration is hardware-based and independent of R/W state.

Can the 7132SA100C operate as a SLAVE device in a dual-port configuration?

No, the 7132SA100C is strictly a MASTER device and cannot function as a SLAVE. It contains on-chip arbitration logic and generates BUSY outputs, whereas SLAVE operation (e.g., IDT7142SA100C) requires BUSY to be an input and omits arbitration circuitry. Attempting to use 7132SA100C as a SLAVE will result in incorrect BUSY behavior and potential data corruption. For SLAVE roles, IDT7142SA100C must be used instead.

What is the minimum required pull-up resistance for BUSY pins on the 7132SA100C?

The datasheet specifies a 270 Ω pull-up resistor for each BUSY pin (BUSYL and BUSYR) on the 7132SA100C. This value ensures valid logic-high levels under worst-case load and timing conditions, particularly during fast transitions in 100 ns operation. Using higher resistance may cause slow rise times and violate tHZ (output high-Z time) specifications; lower resistance increases power consumption unnecessarily and risks exceeding IOL limits (16 mA max).

Does the 7132SA100C support battery backup data retention?

No, the 7132SA100C does not support battery backup data retention. That feature is exclusive to LA-suffixed variants (e.g., 7132LA100C), which guarantee 2.0 V data retention with ICCDR ≤ 4000 µA (military/industrial) or ≤ 1500 µA (commercial). The "SA" suffix denotes standard active power profile only - typical active power is 325 mW, and standby current (ISB3) is 1.0 µA (typ.) at CMOS-level inputs, but no V_CC < 4.5 V retention is specified.

Which packages are available for the 7132SA100C?

The 7132SA100C is available in 48-pin plastic DIP (PDG48), 48-pin sidebraze DIP (SB48), 48-pin LCC (LC48), 48-pin flatpack (FP48), and 52-pin PLCC (PLG52) packages. The "C" suffix in 7132SA100C specifically denotes commercial temperature grade (0°C to +70°C) and confirms compatibility with PDG48 unless otherwise ordered. Pinouts are identical across DIP variants; PLCC and LCC require different footprint and thermal design considerations.