Renesas 7007L20G

Overview

IDT7007L20G from IDT (now Renesas) 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, and on-chip semaphore/interrupt arbitration logic. It enables simultaneous asynchronous reads of the same memory location and supports master/slave cascading for 16-bit+ bus expansion in real-time inter-processor communication systems.

For engineers reviewing the IDT7007L20G datasheet, IDT7007L20G pinout, IDT7007L20G application, or IDT7007L20G equivalent, key selection considerations include BUSY-flag arbitration timing (tBDD ≤ 30 ns), dual-port power-down current (ISB3 = 0.2 mA typ.), TTL-compatible I/O levels, and support for semaphore-controlled resource sharing between heterogeneous processors.

Technical Context

The IDT7007L20G implements fully asynchronous dual-port operation with separate address, control, and bidirectional data buses per port. Its on-chip arbitration logic resolves contention via push-pull BUSY outputs (not open-drain) and supports both address-match and CE-controlled BUSY assertion modes with tAPS = 5 ns setup requirement.

It integrates dedicated interrupt flag registers at fixed addresses (7FFE_H for INTL, 7FFF_H for INTR) and eight hardware semaphores accessed via A0–A2 with SEM pin control. Memory access requires CE = VIL & SEM = VIH; semaphore access requires CE = VIH & SEM = VIL - mutually exclusive modes enforced by internal logic.

Key Specifications

Pinout & Package

Package: 80-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, 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 70V27L25PF8, the IDT7007L20G delivers unique value through integrated hardware semaphores and interrupt mailboxes - eliminating external logic and reducing BOM count - while maintaining industry-leading 0.2 mA full-standby current and 20 ns performance in the same 80-pin footprint.

Availability

IDT7007L20G is available at Aetrix Electronics and suitable for industrial PLC communication bridges, avionics health monitors, and medical imaging real-time buffers requiring stable component supply across extended product lifecycles.

Supply support for IDT7007L20G 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 management, and memory solutions for industrial, automotive, and communications markets.

The IDT7007L20G belongs to Renesas' legacy dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where hardware arbitration and interrupt signaling are critical.

FAQ

What is the maximum operating temperature range for the IDT7007L20G?

The IDT7007L20G is rated for industrial temperature operation from −40°C to +85°C. This specification is validated across all electrical parameters including access time (tAA ≤ 20 ns), standby current (ISB3 ≤ 5 µA), and BUSY arbitration timing (tBDD ≤ 30 ns), ensuring reliable performance in harsh environments such as factory automation controllers and outdoor telecom equipment.

Does the IDT7007L20G support true simultaneous read operations from both ports to the same memory address?

Yes, the IDT7007L20G features true dual-port memory cells that permit concurrent reads from identical addresses on the left and right ports without contention or timing penalty. This capability is inherent to its silicon architecture - confirmed in the Functional Block Diagram and Truth Table I - and enables lock-free data sharing in multi-processor systems without software coordination overhead.

How does the BUSY arbitration logic function in MASTER vs. SLAVE configuration on the IDT7007L20G?

When M/S = H (MASTER), BUSYL and BUSYR are push-pull outputs that assert low to block writes during address contention; when M/S = L (SLAVE), they become inputs that must be driven externally to inhibit writes. The IDT7007L20G's arbitration logic enforces priority via tAPS = 5 ns setup time and guarantees tBDD ≤ 30 ns disable-to-valid-data delay - critical for deterministic real-time response.

Can the IDT7007L20G be used in a 16-bit data bus configuration?

Yes, the IDT7007L20G supports 16-bit expansion via Master/Slave cascading using the M/S pin. Two devices can be configured - one as MASTER (M/S = H), one as SLAVE (M/S = L) - with BUSY signals interconnected to coordinate access. This eliminates need for external glue logic and maintains full 20 ns speed across the combined 16-bit word, as documented in the "IDT MASTER/SLAVE Dual-Port RAM approach" section.

What are the voltage and timing requirements for accessing the semaphore registers on the IDT7007L20G?

Semaphore access requires CE = VIH and SEM = VIL - a mode mutually exclusive from RAM access. Address A0–A2 selects one of eight flags; I/O0 writes the flag value, and all I/O lines (I/O0–I/O7) read it back. tSAA ≤ 20 ns and tSOP ≥ 10 ns define valid timing windows, and the device guarantees tSWRD ≤ 5 ns (write-to-read delay) and tSPS ≥ 5 ns (contention window) to ensure atomic flag updates.