Renesas 70V27L20PFI

Overview

70V27L20PFI from Integrated Device Technology is a high-speed 3.3V 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address, 20 ns maximum read cycle time (tRC), 660 µW typical standby power, and industrial temperature range (–40°C to +85°C). It serves as a stand-alone or master/slave-expanded memory in real-time inter-processor communication systems.

For engineers reviewing the 70V27L20PFI datasheet, 70V27L20PFI pinout, 70V27L20PFI application, or 70V27L20PFI equivalent, key selection criteria include bus-matching byte controls (UBL/LBL), on-chip semaphore arbitration, BUSY/INT flag signaling, and LVTTL-compatible 3.3V operation without level-shifting.

Technical Context

The 70V27L20PFI implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port contention via address-match or chip-enable timing, generating push-pull BUSY outputs (not tri-state) and supporting both master (BUSY output) and slave (BUSY input) configurations via M/S pin.

It integrates full hardware semaphore signaling across eight flags addressed by A0–A2, with dedicated SEM pins and non-overlapping write/read timing (tSWRD = 5 ns, tSPS = 5 ns). The device supports depth expansion via dual CE enables and data-width expansion to 32+ bits using master/slave cascading with BUSY-driven synchronization.

Key Specifications

Pinout & Package

70V27L20PFI is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VDD and VSS pins require local decoupling per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AC, the 70V27L20PFI delivers faster 20 ns access, integrated BUSY arbitration, and hardware semaphores-reducing BOM count and improving determinism. Unlike R1EX24064ASAS0I, it provides true parallel dual-port operation essential for low-latency inter-processor data exchange.

Availability

70V27L20PFI is available at Aetrix Electronics and suitable for industrial PLC communication, real-time motor control, and avionics data concentrators requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V27L20PFI 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The IDT70V27 family was engineered specifically for deterministic inter-processor communication in real-time embedded systems, emphasizing low-latency arbitration, hardware semaphore support, and industrial-grade reliability.

FAQ

What is the maximum operating speed of the 70V27L20PFI?

The 70V27L20PFI has a maximum read cycle time (tRC) of 20 ns, supporting effective operation up to 50 MHz in synchronous systems. This specification is guaranteed over the full industrial temperature range (–40°C to +85°C) and 3.3 V ± 0.3 V supply, with all AC parameters validated under defined test loads and signal transition conditions per the official datasheet.

Does the 70V27L20PFI support true simultaneous access to the same memory location?

Yes, the 70V27L20PFI features true dual-ported memory cells that allow independent, asynchronous read or write operations to the exact same address from left and right ports. When contention occurs, on-chip arbitration logic uses address-match or chip-enable timing to assert BUSY flags and prevent data corruption-no external logic is required for safe concurrent access.

How does the M/S pin affect BUSY functionality in the 70V27L20PFI?

In the 70V27L20PFI, the M/S pin configures BUSY behavior: when M/S = VIH, BUSYL and BUSYR are push-pull outputs indicating port contention; when M/S = VIL, they become inputs that inhibit writes on the receiving port. This enables flexible master/slave topologies where one device coordinates access while others respond to BUSY signals.

What power-saving modes does the 70V27L20PFI offer?

The 70V27L20PFI provides multiple power-saving modes: full standby (ISB3 = 0.2 mA typ.) when both ports are deselected with CMOS-level inputs; single-port standby (ISB4 = 85 mA typ. at 20 ns speed); and dynamic power-down controlled by CE0/CE1 enables. These modes reduce active current to 170 mA (typ.) and enable energy-efficient operation in battery-backed or thermally constrained systems.

Can the 70V27L20PFI be used for 32-bit data bus expansion?

Yes, the 70V27L20PFI supports seamless 32-bit expansion using its Master/Slave select (M/S) feature. Cascading two devices-one configured as Master (M/S = VIH), the other as Slave (M/S = VIL)-enables synchronized 32-bit word access with automatic BUSY flag coordination, eliminating the need for external logic or timing compensation in wide-memory architectures.