Renesas 7007S20JI8

Overview

IDT7007S20JI8 from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 20 ns max access time (industrial grade), 5 V ±10% single supply, and integrated hardware semaphore/arbiter logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the IDT7007S20JI8 datasheet, IDT7007S20JI8 pinout, IDT7007S20JI8 application, or IDT7007S20JI8 equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤ 30 ns), interrupt mailbox addressing (7FFE/7FFF), dual-port power-down control via CE, and compatibility with 16-bit+ memory expansion using M/S select.

Technical Context

The IDT7007S20JI8 implements fully asynchronous dual-port operation: each port has dedicated address (A0–A14), data (I/O0–I/O7), and control lines (CEL/CER, R/WL/R/WR, OEL/OER), enabling simultaneous read/write to same or different addresses without external logic. Its on-chip arbitration uses push-pull BUSY flags and master/slave (M/S) configuration to resolve contention.

It supports two distinct memory access modes: standard RAM access (CE = LOW, SEM = HIGH) and semaphore register access (CE = HIGH, SEM = LOW), with eight semaphore flags addressed by A0–A2. Interrupt flags (INTL/INTR) are triggered by writes to fixed mailbox addresses 7FFE_H (left port) and 7FFF_H (right port).

Key Specifications

Pinout & Package

Package: 80-pin TQFP (14 mm × 14 mm × 1.4 mm), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AC and R1EX24032AS0I-20, the IDT7007S20JI8 delivers unique value through on-die semaphore registers, push-pull BUSY signaling, and 5 V TTL compatibility - reducing BOM count and firmware burden in industrial and avionics dual-processor systems.

Availability

IDT7007S20JI8 is available at Aetrix Electronics and suitable for industrial PLCs, real-time motor controllers, avionics data concentrators, and medical imaging pipelines requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for IDT7007S20JI8 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

IDT (Integrated Device Technology) was a fabless semiconductor company specializing in timing, memory interface, and RF solutions, acquired by Renesas Electronics in 2019; its dual-port SRAM portfolio remains widely deployed in mission-critical systems.

The IDT7007S20JI8 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in industrial automation, aerospace, and test equipment where hardware arbitration and interrupt signaling eliminate software bottlenecks.

FAQ

What is the maximum operating temperature range certified for the IDT7007S20JI8?

The IDT7007S20JI8 is rated for industrial temperature operation from −40°C to +85°C, verified across all AC and DC specifications in the official datasheet. This range applies to the full 20 ns access time performance and includes guaranteed timing margins for BUSY arbitration (tBDD ≤ 30 ns) and interrupt response (tINS ≤ 20 ns) under worst-case thermal conditions.

Does the IDT7007S20JI8 support true simultaneous read operations on both ports to the same memory location?

Yes, the IDT7007S20JI8 supports true simultaneous reads to the same memory location from both left and right ports without contention or delay. Its dual-port SRAM cell architecture guarantees independent access paths, and the BUSY signal remains inactive during concurrent reads - enabling lock-free data sharing in multi-core systems.

How is semaphore functionality implemented in the IDT7007S20JI8, and what pins control it?

Semaphore functionality in the IDT7007S20JI8 is implemented via eight dedicated hardware registers addressed by A0–A2, accessed when CE = HIGH and SEM = LOW. The SEML/SEMR pins enable semaphore mode per port, and I/O0–I/O7 serve as bidirectional data lines for reading/writing semaphore flags - eliminating software-based mutex routines.

Can the IDT7007S20JI8 be used in a 16-bit data bus configuration, and how is this achieved?

Yes, the IDT7007S20JI8 supports 16-bit expansion using the Master/Slave (M/S) configuration. When cascading two devices, one is configured as master (M/S = HIGH) and the other as slave (M/S = LOW), enabling full-speed 16-bit word access without external glue logic - as confirmed in the functional description and pin configuration diagrams.

What are the power consumption characteristics of the IDT7007S20JI8 in standby mode?

In full standby mode (ISB3), the IDT7007S20JI8 draws ≤5 mA with both ports disabled and all inputs at CMOS levels. With one port active and the other in TTL-level standby (ISB2), current is ≤190 mA. These values are measured at VCC = 5.0 V and TA = +25°C, and remain within specification across the full −40°C to +85°C range.