Renesas 7024S25PFI8

Overview

7024S25PFI8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 25 ns maximum read cycle time (tRC), TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous asynchronous access, on-chip semaphore signaling, and master/slave cascading for 32-bit+ bus expansion in real-time embedded systems.

For engineers reviewing the 7024S25PFI8 datasheet, 7024S25PFI8 pinout, 7024S25PFI8 application, or 7024S25PFI8 equivalent, this page delivers verified electrical specs, package mapping to 84-pin PLCC, arbitration timing behavior, battery-backed data retention at 2V, and validated alternatives for dual-port memory replacement in avionics, test equipment, and digital signal processing architectures.

Technical Context

The 7024S25PFI8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port-enabling concurrent reads/writes to any memory location without external arbitration logic. Its on-chip arbitration logic resolves port contention via BUSY flag assertion and supports semaphore flag management across eight dedicated registers addressed by A0–A2.

It features two independent chip enable (CEL/CER), byte enable (UBL/UBR, LBL/LBR), and read/write (R/WL/R/WR) controls per port, plus interrupt (INTL/INTR) and master/slave select (M/S) pins for system-level coordination. The device operates in three power states: active (750 mW typ.), standby (5 mW typ. for S version), and full standby (1.0 mA typ. with CMOS-level inputs).

Key Specifications

Pinout & Package

7024S25PFI8 is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC) with 0.050" lead pitch and body size ≈ 1.15 in × 1.15 in × 0.17 in. Pin 1 is marked by a corner notch; all VCC and GND pins must be 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 CY7C024AV-25AXC and IDT70V24S25PFGI, the 7024S25PFI8 offers native 5 V operation and proven 2 V battery retention - critical for legacy industrial upgrades and safety-critical data logging where voltage translation or package redesign is prohibited.

Availability

7024S25PFI8 is available at Aetrix Electronics and suitable for industrial PLC memory buffers, digital oscilloscope acquisition FIFOs, and avionics flight data recorders requiring stable component supply across extended product lifecycles.

Supply support for 7024S25PFI8 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 engineered for deterministic real-time memory sharing in dual-processor, DSP, and instrumentation systems - prioritizing arbitration robustness, low-latency access, and industrial reliability over density or cost-per-bit.

FAQ

What is the maximum operating frequency supported by the 7024S25PFI8?

The 7024S25PFI8 has a maximum read cycle time (tRC) of 25 ns, corresponding to a theoretical maximum sustained throughput of 40 MHz. This assumes optimal timing margins and proper termination; actual system clock rate depends on address setup/hold, OE propagation, and bus loading. The device operates asynchronously - no internal clock is required.

Does the 7024S25PFI8 support battery backup, and what is the minimum retention voltage?

Yes, the 7024S25PFI8 supports battery backup with guaranteed data retention down to 2.0 V (VDR). At this voltage, typical data retention current is 100 µA, enabling multi-hour operation on small backup cells. This feature is intrinsic to the "S" variant and does not require external circuitry beyond VCC switching.

How does the master/slave (M/S) pin affect BUSY signal behavior on the 7024S25PFI8?

When M/S = HIGH, the 7024S25PFI8 operates as master: BUSYL/BUSYR become push-pull outputs that assert during port contention. When M/S = LOW, it operates as slave: BUSYL/BUSYR become inputs, allowing external master to drive BUSY and coordinate arbitration - essential for cascading multiple devices in wide-bus systems.

Can the 7024S25PFI8 perform simultaneous read and write operations on the same memory address?

Yes - its true dual-port architecture permits simultaneous read and write to the same address. However, if both ports attempt a write to the same location, the on-chip arbitration logic asserts BUSY to delay the later-arriving write until completion, ensuring data coherency without external logic.

What package type is used for the 7024S25PFI8, and are there thermal or mechanical notes for layout?

The 7024S25PFI8 uses an 84-pin PLCC package (body ≈ 1.15 in × 1.15 in × 0.17 in). Layout requires all VCC and GND pins to be connected to low-inductance planes; thermal vias under the center pad are recommended despite absence of exposed thermal pad, given 750 mW active power dissipation.