Renesas 70V27S20PFI

Overview

IDT70V27S20PFI from Integrated Device Technology is a high-speed 3.3V 32K × 16 dual-port static RAM with true dual-ported architecture enabling simultaneous read/write access to the same memory location, 20 ns maximum access time (industrial grade), 500 mW typical active power, and full on-chip semaphore/INT/BUSY arbitration logic - deployed in real-time DSP co-processing, FPGA-to-processor bridging, and industrial motion control systems.

For engineers reviewing the IDT70V27S20PFI datasheet, IDT70V27S20PFI pinout, IDT70V27S20PFI application, or IDT70V27S20PFI equivalent, key selection considerations include its 100-pin TQFP package, LVTTL-compatible 3.3V ±0.3V supply, independent left/right port control (CE0L/R, R/WL/R, OEL/R), byte-select capability (UBL/LBL, UBR/LBR), and master/slave cascading support via M/S pin for 32-bit+ bus expansion.

Technical Context

The IDT70V27S20PFI implements fully asynchronous dual-port operation with separate address, data, and control buses per port, enabling concurrent access without external arbitration logic. Its on-chip arbitration uses address-match and chip-enable timing to assert BUSY flags, with tBAA ≤ 20 ns and tBDD ≤ 35 ns under master configuration (M/S = VIH).

It integrates dedicated semaphore registers (8 flags, addressed by A0–A2) with full hardware support for inter-port signaling, plus interrupt generation triggered by writes to fixed addresses (7FFE_H/7FFF_H). Power management includes four standby modes (ISB1–ISB4), with ISB3 as low as 0.2 mA (typ.) when both ports are CMOS-idle.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (PN100-1), 14 mm × 14 mm × 1.4 mm body, lead finish SnPb (EOL as of June 2018); all VDD pins require local decoupling, all VSS pins must be grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AC and R1EX24032AS0C-20, IDT70V27S20PFI delivers integrated hardware arbitration (BUSY/SEM/INT), reducing BOM count and firmware complexity in tightly coupled multi-processor systems - critical for deterministic response in motion control and avionics.

Availability

IDT70V27S20PFI is available at Aetrix Electronics and suitable for industrial motion controllers, FPGA-DSP co-processing bridges, and redundant PLC memory modules requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for IDT70V27S20PFI 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, is a fabless semiconductor company specializing in timing, memory interface, RF, and power management ICs for communications, computing, and industrial markets.

IDT70V27S20PFI belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where software-managed memory coherency is insufficient.

FAQ

What is the operating temperature range for IDT70V27S20PFI?

IDT70V27S20PFI is rated for industrial temperature operation from −40°C to +85°C, validated across all electrical parameters including access time (20 ns max), power consumption, and BUSY arbitration timing - making it suitable for factory automation, motor drives, and outdoor infrastructure equipment where ambient thermal stress is significant.

Does IDT70V27S20PFI support true simultaneous read/write to the same address?

Yes, IDT70V27S20PFI implements true dual-ported memory cells that allow concurrent read and write operations to the identical memory location without conflict or additional logic. This capability is intrinsic to its silicon architecture and is explicitly confirmed in the functional description and truth tables of the official datasheet (DSC 3603/17).

How does the BUSY arbitration work on IDT70V27S20PFI?

IDT70V27S20PFI uses hardware-based BUSY arbitration triggered by address match or chip-enable assertion. When M/S = VIH (master), BUSY outputs assert within tBAA ≤ 20 ns to block conflicting writes; when M/S = VIL (slave), BUSY is an input that halts local writes until deasserted - ensuring deterministic resolution of port-to-port contention without software intervention.

Can IDT70V27S20PFI be used in a 32-bit data bus configuration?

Yes, IDT70V27S20PFI supports 32-bit expansion via Master/Slave cascading: two devices are connected with M/S = VIH (master) and M/S = VIL (slave), using BUSY handshake and shared address/data lines. The datasheet confirms this topology enables "full-speed, error-free operation without additional discrete logic" for word widths ≥32 bits.

What is the standby power consumption of IDT70V27S20PFI?

IDT70V27S20PFI offers four standby modes. In full CMOS-idle (ISB3), current draw is 0.2 mA typical (≤6 mA max) with both ports disabled and all inputs at valid CMOS levels. This ultra-low quiescent power enables always-on monitoring in safety-critical systems while maintaining rapid wake-up capability.