Renesas 7007S25PFI8

Overview

IDT7007S25PFI8 from IDT (now Renesas) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 25 ns maximum access time (industrial temperature range), TTL-compatible 5 V ±10% operation, and on-chip semaphore/interrupt arbitration logic - used in real-time interprocessor communication systems requiring concurrent memory access without external logic.

For engineers reviewing the IDT7007S25PFI8 datasheet, IDT7007S25PFI8 pinout, IDT7007S25PFI8 application, or IDT7007S25PFI8 equivalent, key selection criteria include BUSY/INT timing compatibility, M/S master/slave configuration support, dual-port contention resolution behavior, and industrial-grade (-40°C to +85°C) thermal stability in embedded control subsystems.

Technical Context

The IDT7007S25PFI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling simultaneous read/write operations to the same memory location only when BUSY arbitration permits. Its on-chip hardware supports semaphore flag management (8 flags, addressed via A0–A2) and interrupt signaling (INTL/INTR) triggered by writes to dedicated mailbox addresses (7FFE_H/7FFF_H).

Port arbitration uses push-pull BUSY outputs (not open-drain) and requires strict tAPS (5 ns setup) for deterministic priority resolution when M/S = VIH (Master mode); in Slave mode (M/S = VIL), BUSY acts as an input that inhibits writes during contention, eliminating need for external arbitration logic.

Key Specifications

Pinout & Package

80-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm; RoHS-compliant, green-part option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-25AC, IDT7007S25PFI8 integrates arbitration and semaphore logic, reducing BOM count and PCB area; compared with R1EX24064ASAS0I#U0, it delivers true concurrent access and nanosecond-level determinism essential for interprocessor communication.

Availability

IDT7007S25PFI8 is available at Aetrix Electronics and suitable for industrial PLC communication modules, avionics flight control interfaces, and medical imaging data buffers requiring stable component supply across extended product lifecycles.

Supply support for IDT7007S25PFI8 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 (formerly Integrated Device Technology) is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.

IDT7007S25PFI8 belongs to the IDT7007 family of high-speed dual-port SRAMs designed specifically for deterministic interprocessor communication in real-time embedded systems where concurrent memory access and hardware arbitration are critical.

FAQ

What is the guaranteed maximum access time for IDT7007S25PFI8 over its full operating temperature range?

IDT7007S25PFI8 guarantees a maximum access time (tAA) of 25 ns across the full industrial temperature range of -40°C to +85°C and supply voltage of 5.0 V ±10%. This value is production-tested and specified in the AC Electrical Characteristics table for the 7007X25 speed grade. The parameter applies to both left and right ports under worst-case voltage and temperature conditions.

How does the M/S pin configure arbitration behavior in IDT7007S25PFI8?

When M/S = HIGH, IDT7007S25PFI8 operates as a Master: BUSYL and BUSYR become push-pull outputs that assert during port contention to block conflicting writes. When M/S = LOW, it operates as a Slave: BUSYL and BUSYR become inputs that must be driven externally (or tied HIGH) to enable write inhibition - no internal arbitration occurs in Slave mode without external BUSY control.

Can IDT7007S25PFI8 support simultaneous read operations from both ports to the same memory address?

Yes, IDT7007S25PFI8 supports true simultaneous reads from both ports to the same memory location without BUSY assertion or timing penalty. The device's dual-port cell architecture allows concurrent read access regardless of address overlap; BUSY logic only activates during write-write or write-read contention, not read-read scenarios.

What are the valid interrupt mailbox addresses for IDT7007S25PFI8 and how are they triggered?

IDT7007S25PFI8 uses address 7FFE_H to set the left-port interrupt flag (INTL) and 7FFF_H to set the right-port flag (INTR). INTL asserts when the right port performs a write (CEL = CER = VIL, R/WL = VIL) to 7FFE_H; INTR asserts when the left port writes to 7FFF_H. Clearing is performed by reading the respective address with OE enabled.

Does IDT7007S25PFI8 require external pull-up resistors on BUSY or INT pins?

No, IDT7007S25PFI8 does not require external pull-up resistors on BUSYL, BUSYR, INTL, or INTR pins because all four are push-pull outputs (not open-drain). The datasheet explicitly states BUSY and INT outputs are "non-tri-stated push-pull," meaning they actively drive HIGH or LOW without external biasing components.