Renesas 7024L55PF8

Overview

7024L55PF8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 55 ns max read cycle time, TTL-compatible 5V ±10% supply, and 1 µA typical standby current (L-version). It enables simultaneous asynchronous access to the same memory location and supports master/slave cascading for 32-bit+ bus expansion in real-time inter-processor communication systems.

For engineers reviewing the 7024L55PF8 datasheet, 7024L55PF8 pinout, 7024L55PF8 application, or 7024L55PF8 equivalent, key selection considerations include its dual-port arbitration logic, on-chip semaphore signaling, battery-backed data retention at 2V, industrial temperature range (–40°C to +85°C), and compatibility with PGA/PLCC/TQFP packaging options.

Technical Context

The 7024L55PF8 implements full hardware port arbitration with dedicated BUSY flag generation (M/S = H) and BUSY input (M/S = L), enabling deterministic conflict resolution between ports. Its semaphore logic uses A0–A2 addressing to manage eight shared flags via I/O0–I/O15, with tSPS = 5 ns contention window and tSWRD = 5 ns write-to-read latency.

It operates fully asynchronously per port, supporting independent read/write cycles with tRC = 55 ns (max), tAA = 55 ns (max), and tPD = 50 ns (max chip disable to power-down). The L-version achieves 1 µA ISB3 full-standby current under CMOS-level inputs and retains data at VCC = 2V.

Key Specifications

Pinout & Package

7024L55PF8 is packaged in an 84-pin PLCC (Plastic Leaded Chip Carrier) with 0.050" lead pitch and body size ≈ 1.15 in × 1.15 in × 0.17 in. All VCC and GND pins must be externally connected per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-55AXC and AS7C34098B-55PCN, the 7024L55PF8 uniquely integrates full port arbitration, semaphore management, and 2V data retention - making it the only option among the three that supports autonomous, low-power, safety-certifiable inter-processor communication without external components.

Availability

7024L55PF8 is available at Aetrix Electronics and suitable for industrial PLC communication modules, avionics flight control systems, and medical imaging data buffers requiring stable component supply across extended product lifecycles.

Supply support for 7024L55PF8 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 IDT7024 family was designed specifically for real-time inter-processor communication in military, industrial, and telecom systems requiring deterministic dual-port access, hardware arbitration, and battery-backed operation.

FAQ

What is the maximum operating speed of the 7024L55PF8?

The 7024L55PF8 has a maximum read cycle time (tRC) of 55 ns, corresponding to a theoretical maximum throughput of approximately 18.2 MHz per port. This rating applies across the full industrial temperature range (–40°C to +85°C) and is guaranteed under VCC = 5.0 V ±10%. The device does not require a clock signal and operates fully asynchronously.

Does the 7024L55PF8 support battery backup operation?

Yes, the 7024L55PF8 (L-version) supports battery backup with data retention down to VCC = 2.0 V. At this voltage, typical data retention current (ICCDR) is 100 µA, and the device maintains stored data indefinitely as long as VCC remains ≥2.0 V. This feature is intrinsic to the L variant and is not available in the S-version.

How does the master/slave configuration work on the 7024L55PF8?

The M/S pin configures port behavior: when high, the device acts as Master and drives BUSYL/BUSYR outputs to signal contention; when low, it acts as Slave and accepts BUSY inputs. Cascading multiple 7024L55PF8 devices enables 32-bit+ word systems using IDT's proprietary Master/Slave select protocol - no external glue logic is needed for bus width expansion.

What package type is used for the 7024L55PF8?

The 7024L55PF8 uses an 84-pin PLCC (Plastic Leaded Chip Carrier) package with JEDEC-standard footprint (PLG84). Its body dimensions are approximately 1.15 in × 1.15 in × 0.17 in. Pin 1 is identified by a notch or dot; all VCC and GND pins must be externally connected per datasheet requirements.

Can the 7024L55PF8 perform simultaneous reads from both ports to the same memory address?

Yes, the 7024L55PF8 uses true dual-port SRAM cells that allow completely independent, simultaneous read operations from both left and right ports to identical addresses. This capability is fundamental to its architecture and requires no arbitration or delay - both ports return valid data within their respective tAA (55 ns max) windows.