Renesas 7054L20PRFG

Overview

7054L20PRFG from Renesas Electronics is a high-speed 4K × 8 FourPort™ Static RAM with true simultaneous four-port access, 20 ns maximum access time (commercial grade), 750 mW typical active power, and 1.5 mW typical standby power. It operates on a single 5 V ±10% TTL-compatible supply and is used in real-time multiprocessor communication systems requiring zero-wait-state concurrent memory access.

For engineers reviewing the 7054L20PRFG datasheet, 7054L20PRFG pinout, 7054L20PRFG application, or 7054L20PRFG equivalent, this page delivers verified timing parameters, port-specific control behavior, TQFP-128 package mapping, and validated alternatives for multiport SRAM selection in deterministic embedded systems.

Technical Context

The 7054L20PRFG implements fully asynchronous, independent operation across four ports (P1–P4), each with dedicated address (A0–A11), data I/O (I/O0–I/O7), R/W, CE, and OE signals. No on-chip arbitration logic is included - contention management and port coordination are handled externally by system-level logic.

Each port supports autonomous read/write cycles with separate chip enable (CE) control enabling per-port power-down to 1.5 mW standby current. The memory array uses true FourPort™ SRAM cells permitting simultaneous access to identical addresses across all ports, with user responsibility for data integrity under contention.

Key Specifications

Pinout & Package

7054L20PRFG is housed in a 128-pin TQFP (PKG128) with 32 pins per side. All VCC and GND pins require explicit PCB connection per datasheet notes; no internal power/ground redistribution is provided.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 7054L20PRFG, 70V25L25PF8 trades 5 ns speed for industrial qualification and larger package, while AS7C34098B-20JIN abandons four-port concurrency entirely - neither offers pin compatibility or drop-in replacement capability.

Availability

7054L20PRFG is available at Aetrix Electronics and suitable for real-time multiprocessor communication, digital signal processing co-processing, industrial PLC redundancy modules, and automated test equipment pattern memory requiring stable component supply and long-lifecycle support.

Supply support for 7054L20PRFG 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 delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 7054L20PRFG belongs to Renesas' legacy FourPort™ SRAM product line, engineered specifically for deterministic, contention-tolerant multi-processor memory sharing in systems where external arbitration is preferred over on-chip logic.

FAQ

What is the maximum operating temperature range for the 7054L20PRFG?

The 7054L20PRFG is rated for commercial temperature operation only: 0°C to +70°C. It is not qualified for industrial (−40°C to +85°C) or extended temperature use. This is explicitly defined in the Ordering Information table and confirmed in Table 4 of the datasheet - no derating or characterization data exists beyond +70°C.

Does the 7054L20PRFG support true simultaneous writes from all four ports to the same memory location?

Yes, the 7054L20PRFG's FourPort™ architecture permits simultaneous access - including concurrent writes - to identical addresses across all four ports. However, the datasheet explicitly states that "it is the user's responsibility to ensure data integrity" under such contention, as no internal collision detection or resolution logic is implemented.

How many VCC and GND pins does the 7054L20PRFG have, and why does it matter?

The 7054L20PRFG has multiple dedicated VCC and GND pins distributed across all four sides of the 128-pin TQFP package - confirmed in the Pin Configuration diagram and Notes 1–2. All must be connected to minimize ground bounce, ensure stable power delivery during simultaneous port activity, and meet thermal dissipation requirements for 750 mW typical operation.

Is the 7054L20PRFG pin-compatible with other speed grades like 7054L25PRFG?

No - while both share the same PKG128 TQFP package and pinout, the 7054L20PRFG and 7054L25PRFG are distinct orderables with different AC timing specifications and temperature grading. The 7054L25PRFG is industrial-grade (−40°C to +85°C) and has 25 ns access time; substituting it for 7054L20PRFG requires full system revalidation due to timing and thermal differences.

What is the role of the Output Enable (OE) signal versus Chip Enable (CE) in the 7054L20PRFG?

In the 7054L20PRFG, CE controls power state (VIH = standby, VIL = active), while OE controls output driver enable only during reads (VIL = outputs enabled, VIH = high-impedance). OE has no effect during writes, and CE must be active (VIL) for any access - making CE the primary port selection signal and OE a secondary read-output gate.