Renesas 7007L20J8

Overview

IDT7007L20J8 from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 20 ns maximum access time (industrial grade), 5 V ±10% single-supply operation, and on-chip semaphore/interrupt arbitration logic-designed for real-time inter-processor communication in embedded control systems.

For engineers reviewing the IDT7007L20J8 datasheet, IDT7007L20J8 pinout, IDT7007L20J8 application, or IDT7007L20J8 equivalent, key selection considerations include BUSY-flag arbitration timing (tBDD ≤ 30 ns), dual-port power-down modes (ISB3 ≤ 5 µA), and master/slave configuration via M/S pin for 16-bit memory expansion.

Technical Context

The IDT7007L20J8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port. It supports simultaneous read–read access to identical memory locations and uses push-pull BUSY/INT outputs-not open-drain-with automatic port arbitration triggered by address match or chip-enable assertion.

Its on-chip semaphore logic enables eight hardware flags accessed via A0–A2 and I/O0–I/O7 under SEM = VIL, while interrupt signaling uses dedicated mailbox addresses (7FFE_H and 7FFF_H) with flag set/clear controlled by CE/R/W/OE combinations per Truth Table III.

Key Specifications

Pinout & Package

Package: 80-pin TQFP (PNG80), 14 mm × 14 mm × 1.4 mm body, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-20AXC and AS7C33256B-20TIN, the IDT7007L20J8 delivers integrated arbitration, 5 V compatibility, and master/slave expandability-reducing system-level validation effort and improving determinism in safety-critical dual-CPU architectures.

Availability

IDT7007L20J8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data buses, DSP-FPGA co-processing platforms, and medical imaging subsystems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for IDT7007L20J8 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions-acquired by Renesas in 2019 to strengthen embedded infrastructure offerings.

The IDT7007 family was designed specifically for deterministic inter-processor communication in real-time embedded systems, emphasizing hardware arbitration, low-latency dual-port access, and industrial-grade reliability.

FAQ

What is the maximum operating temperature range for the IDT7007L20J8?

The IDT7007L20J8 is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings table and DC Operating Conditions section of the official datasheet (DSC 2940/16, September 2019). The "L" suffix explicitly denotes the industrial-grade variant, and the "20" indicates 20 ns access time compliance across this full range.

Does the IDT7007L20J8 support true simultaneous read–read operations on the same memory address?

Yes, the IDT7007L20J8 implements true dual-port static RAM cells that permit simultaneous reads from identical memory locations on both left and right ports without contention or arbitration delay. This capability is explicitly stated in the Features section ("True Dual-Ported memory cells which allow simultaneous reads of the same memory location") and verified in Truth Table I under non-contention conditions.

How does the M/S pin affect BUSY signal behavior in the IDT7007L20J8?

When M/S = H, the IDT7007L20J8 operates as a master: BUSYL and BUSYR become push-pull outputs asserting active-low during port contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that must be driven externally to inhibit writes-enabling daisy-chained configurations where one device arbitrates for multiple slaves. This behavior is defined in Note 1 of the Functional Block Diagram and Pin Names table.

What are the valid interrupt mailbox addresses for the IDT7007L20J8, and how are they cleared?

The IDT7007L20J8 uses address 7FFE_H to set the left-port INTL flag (via right-port write) and 7FFF_H to set the right-port INTR flag (via left-port write). Clearing is asymmetric: INTL is cleared by left-port read of 7FFE_H with CER = OER = VIL; INTR is cleared by right-port read of 7FFF_H with CEL = OEL = VIL. This is documented in Truth Table III and the Functional Description section.

Can the IDT7007L20J8 be used in a 16-bit data bus configuration?

Yes-the IDT7007L20J8 supports 16-bit expansion via its Master/Slave (M/S) architecture. Two devices can be cascaded: one configured as master (M/S = H), the other as slave (M/S = L), with BUSY outputs from the master controlling write enables on the slave. This eliminates external logic and is explicitly cited in the Features list: "IDT7007 easily expands data bus width to 16 bits or more using the Master/Slave select when cascading more than one device."