Renesas 7024L55PF/S2899

Overview

7024L55PF/S2899 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 55 ns maximum read cycle time, TTL-compatible 5V ±10% supply, and 2V data retention for battery backup operation. It supports master/slave cascading for 32-bit+ bus expansion and features on-chip semaphore logic and port arbitration for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 7024L55PF/S2899 datasheet, 7024L55PF/S2899 pinout, 7024L55PF/S2899 application, or 7024L55PF/S2899 equivalent, key selection criteria include dual-port access timing (tRC = 55 ns), low standby current (1 µA typ. in full CMOS standby), BUSY/INT flag behavior, M/S-selectable arbitration mode, and compatibility with 84-pin PLCC packaging.

Technical Context

The 7024L55PF/S2899 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling simultaneous read/write to the same memory location. Its on-chip arbitration logic resolves contention via BUSY flag assertion and supports semaphore signaling using A0–A2 address lines to access eight shared flags.

It operates in three power modes: active (750 mW typ.), TTL-level standby (5 mA typ.), and full CMOS standby (1 µA typ.). The L-suffix denotes low-power variant with 2V data retention capability, distinct from S-version's 5 mW standby.

Key Specifications

Pinout & Package

7024L55PF/S2899 is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC, package code PLG84), measuring approximately 1.15 in × 1.15 in × 0.17 in. Pin 1 is marked by a notch or dot; pin numbering follows standard PLCC counterclockwise convention starting at the notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-55AXC and IDT70V24L25PFI, the 7024L55PF/S2899 uniquely combines 5V operation, 2V data retention, and integrated arbitration/semaphore logic-making it irreplaceable in legacy industrial and aerospace systems requiring robust, self-contained dual-port coordination.

Availability

7024L55PF/S2899 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data modules, and medical imaging frame stores requiring stable component supply across extended product lifecycles.

Supply support for 7024L55PF/S2899 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 since 2019.

The IDT7024 family was designed specifically for high-reliability dual-processor systems needing deterministic, hardware-managed memory sharing-targeting industrial automation, defense electronics, and medical instrumentation.

FAQ

What is the maximum operating speed of the 7024L55PF/S2899?

The 7024L55PF/S2899 has a maximum read cycle time (tRC) of 55 ns, corresponding to a theoretical maximum sustained access rate of ~18.2 MHz. This applies across the full industrial temperature range (–40°C to +85°C) and is validated for both ports operating independently under specified 5V ±10% supply conditions. The '55' in the part number directly indicates this speed grade.

Does the 7024L55PF/S2899 support battery backup operation?

Yes, the 7024L55PF/S2899 supports battery backup operation with guaranteed data retention at VCC = 2.0 V. In this mode, the device draws only 100 µA typical (up to 4 mA max) while preserving all 64 Kbits of memory content. This feature is exclusive to the 'L' (low-power) variant and is confirmed in datasheet Table 10 under Data Retention Characteristics.

How does the Master/Slave (M/S) pin affect BUSY flag behavior on the 7024L55PF/S2899?

When M/S = HIGH, the 7024L55PF/S2899 operates as a master: BUSYL and BUSYR become outputs that assert during port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs sampled by the device to synchronize writes. This configuration enables daisy-chained arbitration without external logic-critical for multi-processor memory expansion.

Can the 7024L55PF/S2899 be used in a 32-bit data bus configuration?

Yes, the 7024L55PF/S2899 supports 32-bit bus expansion via its Master/Slave cascade capability. Two devices can be configured-one as master (M/S = H), one as slave (M/S = L)-with BUSY handshaking to ensure atomic 32-bit transfers. The datasheet explicitly states this topology eliminates need for external logic and maintains full-speed operation without wait states.

What package type is used for the 7024L55PF/S2899?

7024L55PF/S2899 uses an 84-pin Plastic Leaded Chip Carrier (PLCC), designated PLG84 in IDT documentation. The package body measures approximately 1.15 inches square and 0.17 inches thick, with gull-wing leads suitable for through-hole or surface-mount assembly. Pin 1 is identified by a corner notch or dot, and all VCC/GND pins must be properly decoupled per layout guidelines.