Renesas 7024L20GB

Overview

7024L20GB from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 20 ns maximum access time (industrial grade), 1 mW typical standby power, and full on-chip semaphore arbitration logic. It enables simultaneous asynchronous reads/writes to the same memory location and supports MASTER/SLAVE cascading for 32-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the 7024L20GB datasheet, 7024L20GB pinout, 7024L20GB application, or 7024L20GB equivalent, key selection criteria include dual-port arbitration timing (tAPS = 5 ns), BUSY flag behavior under contention, battery-backed data retention at 2 V, TTL-compatible 5 V ±10% operation, and support for separate upper/lower byte control in multiplexed bus architectures.

Technical Context

The 7024L20GB implements fully asynchronous dual-port architecture with independent address, control, and I/O buses per port. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion (M/S = H) or BUSY input (M/S = L), and supports eight hardware semaphores addressed by A0–A2 for inter-processor synchronization.

It features true dual-ported SRAM cells enabling concurrent read access to identical addresses, plus dedicated interrupt and semaphore signaling paths. The device operates across –40°C to +85°C (industrial grade), uses CMOS high-performance fabrication, and enters ultra-low-power standby (<1 mW typ.) when both chip enables are deasserted with CMOS-level inputs.

Key Specifications

Pinout & Package

7024L20GB is housed in a 100-pin TQFP (PNG100) package with 0.5 mm pitch, 14 mm × 14 mm footprint, and 1.4 mm height. Pin assignments follow standard dual-port layout with mirrored left/right I/O, address, and control groups, plus dedicated SEM, INT, BUSY, and M/S signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-20VC and AS7C34096B-20TIN, the 7024L20GB uniquely integrates full arbitration, semaphore, and MASTER/SLAVE logic in a single 5 V industrial-grade package-reducing BOM count, PCB area, and firmware complexity for tightly coupled multi-processor systems.

Availability

7024L20GB is available at Aetrix Electronics and suitable for real-time motion control, avionics subsystems, and industrial PLCs requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 7024L20GB 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, now part of Renesas Electronics.

The 7024L20GB belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems requiring hardware-coordinated memory access.

FAQ

What is the operating temperature range certified for the 7024L20GB?

The 7024L20GB is rated for the industrial temperature range of –40°C to +85°C. This specification is explicitly confirmed in the datasheet's "Maximum Operating Temperature and Supply Voltage" table and applies to all speed grades including the 20 ns version. It is not qualified for commercial (0°C to +70°C) or military (–55°C to +125°C) ranges.

Does the 7024L20GB support battery backup operation, and what voltage is required?

Yes, the 7024L20GB supports battery backup operation with data retention down to 2.0 V (VDR = 2.0 V min). In this mode, it draws ≤4000 µA (typ. 100 µA) from the backup source while maintaining stored data-enabling nonvolatile operation during main power failure in industrial control applications.

How does the M/S pin affect BUSY signal behavior on the 7024L20GB?

When M/S = H (high), the 7024L20GB operates as Master: BUSYL and BUSYR become output signals asserting during port contention. When M/S = L (low), it operates as Slave: BUSYL and BUSYR become inputs used to synchronize writes with a Master device-enabling hardware-controlled cascading without external logic.

Can the 7024L20GB perform simultaneous reads from both ports to the same memory address?

Yes, the 7024L20GB uses true dual-ported SRAM cells that allow fully asynchronous, simultaneous reads from both left and right ports to identical memory locations. This capability is explicitly stated in the "Features" section and requires no arbitration or delay-unlike pseudo-dual-port devices that serialize such accesses.

What package type is used for the 7024L20GB, and are pin-compatible alternatives available in other packages?

The 7024L20GB is supplied exclusively in a 100-pin Thin Quad Flatpack (TQFP, package code PNG100). While the IDT7024 family also exists in 84-pin PGA (GU84), Flatpack (FP84), and PLCC (PLG84), the 7024L20GB variant is documented only in the 100-pin TQFP configuration per the official ordering information and pin diagrams.