Renesas 7024L20PFI

Overview

7024L20PFI from IDT is a high-speed 4K × 16 true dual-port static RAM with independent asynchronous left/right ports, 20 ns max access time (industrial grade), 1 mW typical standby power, and on-chip semaphore/arbiter logic-used in real-time inter-processor communication systems requiring concurrent read/write access to shared memory.

For engineers reviewing the 7024L20PFI datasheet, 7024L20PFI pinout, 7024L20PFI application, or 7024L20PFI equivalent, key selection criteria include dual-port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S configuration, battery-backed data retention at 2V, and compatibility with 84-pin PLCC packaging for legacy industrial control backplanes.

Technical Context

The 7024L20PFI implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port, enabling simultaneous reads from identical memory locations without contention. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion and supports master/slave cascading for 32-bit+ bus expansion.

It integrates full hardware semaphore signaling (8 flags, addressed by A0–A2) and supports both RAM and semaphore access modes via SEM pin state. The L-version delivers ultra-low standby current (1 µA typ. at CMOS-level inputs) while maintaining 2V data retention-critical for battery-backed systems.

Key Specifications

Pinout & Package

7024L20PFI is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with standard 0.050" lead pitch and 1.15" × 1.15" body size. All VCC and GND pins require direct connection to respective supply rails per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-20AXC and IDT7025L20PF, the 7024L20PFI uniquely combines 84-pin PLCC compatibility, integrated M/S cascading, and 1 µA standby current-making it optimal for retrofitting legacy industrial systems with minimal layout change.

Availability

7024L20PFI is available at Aetrix Electronics and suitable for industrial PLC backplanes, avionics data buffers, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for 7024L20PFI 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.

The IDT7024 family was designed specifically for deterministic inter-processor communication in real-time embedded systems-emphasizing hardware arbitration, low-power retention, and industrial temperature reliability.

FAQ

What is the maximum operating temperature range for the 7024L20PFI?

The 7024L20PFI is rated for industrial temperature operation from −40°C to +85°C. This specification is validated across all electrical parameters including access time, standby current, and BUSY arbitration timing-ensuring reliable performance in factory automation and transportation control environments where ambient thermal stress is significant.

Does the 7024L20PFI support battery backup operation?

Yes, the 7024L20PFI supports battery backup with data retention at 2V VCC. In this mode, typical data retention current is 100 µA (max 4 mA) and the device maintains stored contents indefinitely as long as VCC remains ≥2.0 V-enabling seamless failover in uninterruptible power systems without volatile data loss.

How does the M/S pin affect BUSY signal behavior on the 7024L20PFI?

When M/S = HIGH, the 7024L20PFI operates as Master: BUSYL and BUSYR are push-pull outputs asserting during port contention. When M/S = LOW, it operates as Slave: BUSYL and BUSYR become inputs, allowing external BUSY signals from a Master device to gate local write operations-enabling hierarchical arbitration in multi-device configurations.

What is the purpose of the SEM pin on the 7024L20PFI?

The SEM pin on the 7024L20PFI selects between RAM array access (SEM = HIGH) and 8-bit semaphore register access (SEM = LOW). Semaphore addresses are decoded from A0–A2, and semaphore flags are written via I/O0 and read across all 16 I/O lines-providing hardware-enforced mutual exclusion without CPU intervention.

Is the 7024L20PFI pin-compatible with other IDT7024 variants like the 7024S20PFI?

Yes, the 7024L20PFI shares identical pinout and package (84-pin PLCC) with the 7024S20PFI and other speed-grade variants in the IDT7024 family. The only functional difference is standby current: the L-version draws 1 µA (typ) vs. 5 µA (typ) for the S-version-both meet the same 20 ns access time and industrial temperature specs.