Renesas IDT70V27S20PFI

Overview

IDT70V27S20PFI from Integrated Device Technology is a high-speed 3.3V 32K × 16 true dual-port static RAM with independent left/right ports, 20 ns maximum access time (industrial grade), LVTTL-compatible I/O, and on-chip semaphore/arbiration logic - used in real-time inter-processor communication, FPGA co-processing buffers, and legacy bus bridging where simultaneous read/write to same address must be supported without external logic.

For engineers reviewing the IDT70V27S20PFI datasheet, IDT70V27S20PFI pinout, IDT70V27S20PFI application, or IDT70V27S20PFI equivalent, key selection criteria include BUSY flag arbitration timing (tBAA ≤ 20 ns), dual-chip-enable depth expansion capability, 100-pin TQFP package compatibility, and industrial temperature support (–40°C to +85°C) for embedded control systems.

Technical Context

The IDT70V27S20PFI implements fully asynchronous dual-port architecture with separate address, control, and bidirectional data buses per port - enabling concurrent access to any memory location without cycle overlap restrictions. It integrates hardware semaphore signaling (8 flags, addressed via A0–A2), automatic port arbitration, and MASTER/SLAVE configuration via M/S pin for 32-bit+ bus expansion.

Its power management uses TTL- and CMOS-level chip enables (CE0/CE1) to independently place each port into low-power standby (ISB1 ≤ 60 mA typ. at 20 ns speed), while maintaining full 3.3V ±0.3V single-supply operation and LVTTL signal compatibility across all I/Os.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (PN100-1), body size 14 mm × 14 mm × 1.4 mm; lead finish SnPb (EOL as of June 2018).

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#U0, the IDT70V27S20PFI uniquely delivers hardware semaphore signaling and automatic BUSY-based port arbitration in a single 100-pin package - eliminating external logic and reducing design cycle time for tightly coupled multi-processor systems.

Availability

IDT70V27S20PFI is available at Aetrix Electronics and suitable for industrial PLC communication buffers, FPGA-CPU co-processing interfaces, and avionics data concentrators requiring stable component supply with long-term lifecycle assurance.

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 sensor signal conditioning ICs for communications, computing, and industrial markets.

The IDT70V27S20PFI belongs to IDT's high-speed dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems where simultaneous access, hardware arbitration, and industrial reliability are mandatory.

FAQ

What is the operating temperature range for IDT70V27S20PFI?

IDT70V27S20PFI is rated for industrial temperature operation from –40°C to +85°C, verified across all AC and DC specifications in the datasheet. This range applies to the 20 ns speed grade (S20) and supports deployment in harsh environments such as factory automation controllers and outdoor telecom equipment without derating.

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

Yes, IDT70V27S20PFI implements true dual-ported memory cells that allow concurrent read and write operations to identical addresses - a core architectural feature confirmed in the Functional Block Diagram and Truth Table II. This eliminates bus contention and enables lock-free inter-processor communication without external arbitration logic.

How does the BUSY arbitration mechanism work on IDT70V27S20PFI?

IDT70V27S20PFI asserts BUSY on the contending port when address or chip enable matches occur between ports. With M/S = VIH (Master), BUSY is an output that blocks writes until cleared; with M/S = VIL (Slave), BUSY is an input that inhibits local writes. Timing parameters like tBAA (≤20 ns) and tAPS (≤5 ns) guarantee deterministic resolution.

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

Yes, IDT70V27S20PFI supports 32-bit expansion via Master/Slave cascading: two devices are connected with M/S = VIH on the Master and M/S = VIL on the Slave, using BUSY handshake and CE enables to coordinate access - explicitly documented in the Description section and functional block diagram.

What is the standby power consumption of IDT70V27S20PFI?

IDT70V27S20PFI draws 3.3 mW typical standby power (ISB3) when both ports are fully disabled (CE0/CE1 > VDD − 0.2 V), and 60 mA typical ISB1 current when ports are in TTL-level standby mode. These values are measured at VDD = 3.3 V and TA = +25°C, and scale predictably across the industrial temperature range.