Renesas 7054S35PRF

Overview

7054S35PRF from Renesas Electronics is a high-speed 4K × 8 FourPort™ Static RAM with true simultaneous four-port access, 35 ns maximum read cycle time (tRC), TTL-compatible 5 V ±10% operation, and 128-pin TQFP packaging. It enables real-time inter-processor communication in multiprocessor systems requiring zero-wait-state memory sharing across independent control domains.

For engineers reviewing the 7054S35PRF datasheet, 7054S35PRF pinout, 7054S35PRF application, or 7054S35PRF equivalent, this device serves as a deterministic, fully asynchronous shared memory resource where port arbitration is handled externally - critical for lock-free synchronization, FPGA co-processing buffers, and deterministic real-time embedded architectures.

Technical Context

The 7054S35PRF implements a true FourPort architecture with four independent address/control/I/O buses - P1 through P4 - each with dedicated CE, OE, R/W, A0–A11, and I/O0–I/O7 signals. No internal arbitration logic is present; contention resolution and data integrity are managed externally by system-level logic.

All ports operate fully asynchronously with no shared clocks or timing dependencies. Each port supports independent read/write cycles with guaranteed 35 ns tRC, 35 ns tAA, and 25 ns tAOE under commercial temperature conditions (0°C to +70°C), powered from a single 5 V supply.

Key Specifications

Pinout & Package

7054S35PRF is housed in a 128-pin TQFP (PKG128) with exposed pad grounding recommended per Renesas layout guidelines. All VCC and GND pins must be individually decoupled; package body measures 14 mm × 20 mm × 1.4 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1356KV18 and IDT70V25L25PF, the 7054S35PRF uniquely delivers native 5 V TTL-compatible four-port concurrency in a 128-pin TQFP - making it irreplaceable for legacy or cost-sensitive multiprocessor designs requiring deterministic, zero-wait-state shared memory without FPGA-based arbitration logic.

Availability

7054S35PRF is available at Aetrix Electronics and suitable for real-time multiprocessor communication, FPGA-CPU shared buffering, deterministic industrial PLC I/O mapping, and legacy bus bridge memory applications requiring stable component supply and long-term lifecycle support.

Supply support for 7054S35PRF 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 7054S35PRF belongs to Renesas' legacy FourPort™ SRAM product line, designed specifically for deterministic, multi-master memory sharing in systems where external arbitration and zero-wait-state performance are mandatory.

FAQ

What is the maximum operating frequency supported by the 7054S35PRF?

The 7054S35PRF does not operate on a clock; it is fully asynchronous. Its timing is defined by access parameters: maximum read cycle time (tRC) is 35 ns, meaning it supports up to ~28.6 MHz effective throughput per port when continuously reading. Actual system frequency depends on external controller timing margins and bus protocol overhead.

Does the 7054S35PRF include internal arbitration logic between ports?

No, the 7054S35PRF has no internal arbitration logic. When multiple ports access the same memory location simultaneously, data integrity is the responsibility of the external system - typically enforced via external PLD/FPGA logic, priority encoders, or time-sliced access scheduling. This design enables deterministic, low-latency behavior unencumbered by arbitration overhead.

Can the 7054S35PRF be used in industrial temperature applications?

No, the 7054S35PRF is rated only for commercial temperature range (0°C to +70°C). The industrial-grade variant - designated 7054L25PRF - supports –40°C to +85°C but has a slower 25 ns speed grade. The 'S' in 7054S35PRF explicitly denotes commercial-only qualification per Renesas ordering nomenclature.

How many power and ground pins does the 7054S35PRF have, and why does it matter?

The 7054S35PRF has 16 VCC and 16 GND pins distributed across all four edges of the 128-pin TQFP package. This minimizes power delivery impedance and reduces simultaneous switching noise - critical for maintaining signal integrity across four independent high-speed data buses operating at sub-35 ns timing windows.

Is the 7054S35PRF pin-compatible with other members of the IDT7054 family?

Yes, all IDT7054 variants - including 7054L20PRF, 7054L25PRF, and 7054S35PRF - share identical 128-pin TQFP pinouts and electrical interfaces. Speed and power grades differ only in internal timing and leakage characteristics; no PCB redesign is required when substituting within the same package code (PRF).