Renesas 7024L20JGI

Overview

7024L20JGI from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 20 ns max access time (industrial grade), 2V data retention capability, and full on-chip semaphore arbitration logic - used in real-time inter-processor communication systems requiring simultaneous read/write access to shared memory.

For engineers reviewing the 7024L20JGI datasheet, 7024L20JGI pinout, 7024L20JGI application, or 7024L20JGI equivalent, key selection considerations include BUSY flag arbitration timing (tBAA ≤ 20 ns), dual-port standby current (ISB3 = 0.2 mA typ.), TTL-compatible 5V ±10% operation, and 84-pin PLCC package compatibility with legacy military/industrial backplanes.

Technical Context

The 7024L20JGI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations-even to the same memory location-without external logic. Its on-chip arbitration logic resolves port contention via Master/Slave (M/S) configuration and generates BUSY flags for cycle blocking.

It supports two distinct memory access modes: standard RAM access (CE = VIL, SEM = VIH) and semaphore register access (CE = VIH or UB/LB = VIH, SEM = VIL), with dedicated interrupt (INTL/INTR) and semaphore enable (SEML/SEMR) signals. The L-version delivers ultra-low standby power (1 mW typ.) and battery-backed data retention down to 2V.

Key Specifications

Pinout & Package

7024L20JGI is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.15 in × 1.15 in × 0.17 in, with lead pitch of 0.05 in and gull-wing leads. All VCC and GND pins must be connected per datasheet note; N/C pins are internally unused.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-20JC and IDT70V24L20PFI, the 7024L20JGI uniquely integrates arbitration, semaphore, and interrupt logic in a TTL-compatible 84-pin PLCC - delivering complete dual-processor coordination in a single component without external logic or voltage translation.

Availability

7024L20JGI is available at Aetrix Electronics and suitable for real-time inter-processor communication, military avionics data buffering, and industrial PLC redundancy modules requiring stable component supply across extended product lifecycles.

Supply support for 7024L20JGI 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 7024L20JGI belongs to IDT's legacy high-reliability dual-port SRAM family, designed specifically for deterministic, low-latency inter-processor communication in aerospace, defense, and industrial control systems.

FAQ

What is the maximum operating temperature range for the 7024L20JGI?

The 7024L20JGI is rated for industrial temperature operation from –40°C to +85°C, verified per manufacturer specifications and qualified for use in demanding embedded environments such as motor drives and avionics subsystems where thermal stability is critical. This range is explicitly confirmed in the "Maximum Operating Temperature" table of the official datasheet.

Does the 7024L20JGI support battery backup operation, and what voltage is required?

Yes, the 7024L20JGI supports battery backup operation with data retention down to 2.0 V, as specified in the "Data Retention Characteristics" section. At VCC = 2V, it maintains stored data with ISB3 = 0.2 mA typical current draw - enabling multi-year retention on standard lithium coin cells without auxiliary circuitry.

How does the Master/Slave (M/S) pin affect BUSY signal behavior in the 7024L20JGI?

When M/S = H, the 7024L20JGI operates as Master: BUSYL/BUSYR are outputs that assert during port contention to block writes on the opposing port. When M/S = L, it operates as Slave: BUSYL/BUSYR become inputs, allowing external arbitration control. This dual-mode behavior is defined in the Functional Block Diagram and Truth Table I notes.

Can the 7024L20JGI perform simultaneous reads from both ports to the same memory address?

Yes, the 7024L20JGI uses true dual-ported memory cells that allow concurrent reads from both left and right ports to identical addresses without conflict or performance penalty - a core feature highlighted in the "Features" section and confirmed by the "True Dual-Ported memory cells" bullet point in the datasheet.

What package type is used for the 7024L20JGI, and how many pins does it have?

The 7024L20JGI uses an 84-pin Plastic Leaded Chip Carrier (PLCC) package, as indicated by the "JGI" suffix and confirmed in the "Pin Configurations" diagrams labeled "PLG84" and "7024 PLCC Top View". Its body dimensions are approximately 1.15 in × 1.15 in × 0.17 in with gull-wing leads.