Renesas 7005L20JGI8

Overview

7005L20JGI8 from IDT is a high-speed 8K × 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 semaphore/arbitration logic for concurrent memory access control in real-time inter-processor communication systems.

For engineers reviewing the 7005L20JGI8 datasheet, 7005L20JGI8 pinout, 7005L20JGI8 application, or 7005L20JGI8 equivalent, this page delivers verified timing specs, master/slave BUSY arbitration behavior, low-power standby current (1 µA typ), and TQFP-64 package compatibility for embedded multiprocessor designs requiring deterministic memory coherency.

Technical Context

The 7005L20JGI8 implements fully asynchronous dual-port operation with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O7L/R/WL/CEL/OEL on left; A0R–A12R/I/O0R–I/O7R/R/WR/CER/OER on right), enabling simultaneous read/write to same or different addresses without external logic. Its on-chip arbitration resolves contention via BUSYL/BUSYR flags and M/S select pin.

It supports two distinct operational modes: RAM mode (CE = LOW, SEM = HIGH) for standard memory access, and semaphore mode (CE = HIGH, SEM = LOW) for eight shared flag registers addressed by A0–A2. Interrupt signaling (INTL/INTR) and power-down (via CE) are hardware-managed with no software overhead.

Key Specifications

Pinout & Package

7005L20JGI8 is housed in a 64-pin thin quad flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad. Pin 1 marked by dot; pins numbered counterclockwise from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20ZC and R1EX24064ASAS-20, the 7005L20JGI8 delivers self-contained arbitration and semaphore functions in silicon - reducing BOM count by ≥3 discrete components and eliminating timing-critical external logic design effort.

Availability

7005L20JGI8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data interfaces, and redundant control systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 7005L20JGI8 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, and RF solutions, now part of Renesas Electronics since 2019.

The IDT7005 family was designed specifically for deterministic inter-processor communication in real-time embedded systems - emphasizing hardware arbitration, low-latency access, and industrial reliability over general-purpose memory density.

FAQ

What is the maximum operating frequency supported by the 7005L20JGI8?

The 7005L20JGI8 does not operate on a clock signal - it is a fully asynchronous dual-port SRAM. Its performance is defined by access time (tAA ≤ 20 ns) and cycle time (tRC ≤ 20 ns), enabling reliable operation up to 50 MHz effective throughput per port when interfaced with appropriately timed control logic.

How does the M/S pin affect BUSY signal behavior in the 7005L20JGI8?

When M/S = HIGH, the 7005L20JGI8 operates as a master: BUSYL and BUSYR are push-pull outputs reflecting arbitration status. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven LOW by a master device - enabling hierarchical multi-device memory expansion.

Can the 7005L20JGI8 retain data during main power loss?

Yes. The 7005L20JGI8 supports battery backup operation: when VCC drops below 2.0 V, it enters data retention mode drawing ≤4000 µA (military/industrial grade), preserving memory contents as long as backup voltage remains ≥2.0 V - confirmed in Table 9 of the official datasheet.

What is the function of the SEM pins on the 7005L20JGI8?

The SEML and SEMR pins enable semaphore register access mode. When SEM = LOW and CE = HIGH, the device ignores RAM address/data and instead maps I/O0–I/O7 to eight shared flag registers addressed by A0–A2 - providing hardware-enforced mutual exclusion for multi-processor resource locking without software overhead.

Is the 7005L20JGI8 pin-compatible with other speed grades in the IDT7005L family?

Yes. All IDT7005L variants (e.g., 7005L15, 7005L25) share identical 64-pin TQFP pinout, electrical interface, and functional block diagram. Only AC timing parameters differ - allowing drop-in replacement for performance tuning without PCB revision.