Renesas 7024L25PF8

Overview

7024L25PF8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 25 ns max read cycle time (tRC), TTL-compatible 5V ±10% supply, and battery-backed data retention down to 2V. It supports simultaneous asynchronous access, on-chip semaphore arbitration, and master/slave cascading for 32-bit+ bus expansion in real-time inter-processor communication systems.

For engineers reviewing the 7024L25PF8 datasheet, 7024L25PF8 pinout, 7024L25PF8 application, or 7024L25PF8 equivalent, key selection considerations include its 25 ns commercial-grade timing, L-version ultra-low standby current (1 mW typ.), dual-port arbitration logic, and 84-pin PLCC package compatibility with legacy military/industrial embedded memory subsystems.

Technical Context

The 7024L25PF8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port-enabling concurrent read/write to any memory location without external logic. Its on-chip arbitration resolves port contention via BUSY flag signaling and supports both master (BUSY output) and slave (BUSY input) configurations.

It integrates full hardware semaphore support using A0–A2 addressing of eight shared flags across both ports, with dedicated SEM, SEML/SEMR, and interrupt (INTL/INTR) signals. The device operates in three power states: active (750 mW typ.), TTL-level standby (1 mA typ. for L version), and full CMOS standby (500 µW typ. at 2V).

Key Specifications

Pinout & Package

7024L25PF8 is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with 0.050″ lead pitch, body size ≈ 1.15″ × 1.15″ × 0.17″, and standard JEDEC MO-047A outline. Pin 1 is marked by a corner notch; pins are numbered counter-clockwise starting from the notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-25JC and AS7C34096B-25JC, the 7024L25PF8 uniquely delivers industrial-temperature operation, integrated master/slave arbitration, and verified 2V battery retention - making it the only option qualified for safety-critical, wide-temperature, and fail-safe memory subsystems.

Availability

7024L25PF8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal processing buffering, and redundant control system memory requiring stable component supply across extended product lifecycles.

Supply support for 7024L25PF8 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 high-performance timing, memory interface, and RF solutions, now part of Renesas Electronics.

The 7024L25PF8 belongs to IDT's legacy dual-port SRAM family, designed specifically for deterministic, low-latency inter-processor communication in aerospace, industrial automation, and telecom infrastructure.

FAQ

What is the guaranteed data retention voltage for the 7024L25PF8?

The 7024L25PF8 guarantees data retention at VCC = 2.0 V minimum across its full industrial temperature range (–40°C to +85°C). This is explicitly specified in Table 10 (tCDR, VDR, ICCDR) and validated for battery backup operation - no derating or margining is required for 2V retention design.

Does the 7024L25PF8 support true simultaneous read operations on both ports to the same memory address?

Yes, the 7024L25PF8 uses true dual-ported memory cells that allow concurrent reads from both left and right ports to the identical address location without conflict, delay, or data corruption - a core architectural feature confirmed in the "Features" section and functional block diagram.

How does the M/S pin configure arbitration behavior in a multi-device 7024L25PF8 system?

When M/S = HIGH, the 7024L25PF8 operates as a master: BUSYR becomes an output asserting busy status to downstream slaves. When M/S = LOW, it acts as a slave: BUSYL becomes an input sampling BUSYR from the upstream master - enabling daisy-chained priority-based arbitration without external logic.

What is the maximum operating frequency supported by the 7024L25PF8's 25 ns access time?

With a 25 ns maximum read cycle time (tRC), the 7024L25PF8 supports sustained operation up to 40 MHz (1/25 ns) in systems where address and control setup/hold times are met. This assumes proper PCB layout, termination, and timing margins per AC Table 12a - not a guaranteed clock rate, but the theoretical upper bound for single-cycle access.

Can the 7024L25PF8 be used in a single-port configuration, and how is that achieved?

Yes - the 7024L25PF8 can operate as a single-port SRAM by tying one port's CE (e.g., CER) permanently HIGH and using only the other port (e.g., left port with CEL, R/WL, A0L–A11L, I/O0L–I/O15L). All control, address, and data signals for the disabled port must remain static and within valid voltage ranges to avoid leakage or undefined behavior.