Renesas 7024L25PFI8

Overview

7024L25PFI8 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 arbitration, and battery backup data retention down to 2V - enabling use in real-time inter-processor communication systems such as radar signal processors and avionics I/O controllers.

For engineers reviewing the 7024L25PFI8 datasheet, 7024L25PFI8 pinout, 7024L25PFI8 application, or 7024L25PFI8 equivalent, key selection criteria include dual-port arbitration timing (tAPS = 5 ns), BUSY flag propagation delay (tBDD ≤ 30 ns), low standby current (ISB3 = 0.2 mA typ.), and 100-pin TQFP package compatibility with multiplexed bus systems requiring upper/lower byte control.

Technical Context

The 7024L25PFI8 implements full hardware port arbitration using dedicated BUSY/INT/SEM signals and supports both master/slave cascading for 32-bit+ word expansion. Its dual-port architecture enables concurrent read/write operations to the same memory location without contention, with automatic resolution via priority logic triggered by address match detection.

It features separate upper-byte (UB/UBR) and lower-byte (LB/LBR) enables per port, allowing byte-level granularity during multiplexed bus transfers. The device operates fully asynchronously - no clock required - and enters ultra-low-power standby (0.2 mA typ.) when both chip enables are deasserted with CMOS-level inputs.

Key Specifications

Pinout & Package

7024L25PFI8 is housed in a 100-pin TQFP (PNG100) package with 0.5 mm pitch, 14 mm × 14 mm body, and 1.4 mm height. Pin functions are symmetrically distributed across four sides to support balanced PCB routing for dual-port buses.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-25BGXI and AS7C34098B-25JCIN, the 7024L25PFI8 uniquely integrates hardware semaphore, master/slave configuration, and 2V data retention - reducing system-level latency, eliminating external logic, and enabling fail-safe operation in power-constrained environments.

Availability

7024L25PFI8 is available at Aetrix Electronics and suitable for radar signal processing, avionics I/O controllers, and industrial PLC backplanes requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 7024L25PFI8 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 embedded systems requiring deterministic, contention-free inter-processor communication - targeting defense, aerospace, and industrial automation markets.

FAQ

What is the maximum operating frequency supported by the 7024L25PFI8?

The 7024L25PFI8 does not require a clock but supports a maximum effective bus frequency of 40 MHz, derived from its 25 ns read cycle time (tRC). This allows zero-wait-state operation in synchronous 40 MHz systems when interfaced with appropriate address strobes and control timing - verified across the full –40°C to +85°C industrial temperature range.

Does the 7024L25PFI8 support battery backup operation, and what voltage is required?

Yes, the 7024L25PFI8 supports battery backup data retention at 2.0 V minimum supply (VDR), with typical retention current of 100 µA and maximum of 4000 µA across military and industrial grades. This enables reliable memory hold during main power failure - confirmed per Table 10 in the official IDT datasheet.

How does the master/slave (M/S) configuration work in the 7024L25PFI8?

When M/S = HIGH, the 7024L25PFI8 acts as master: BUSY is an output flag indicating local port contention. When M/S = LOW, it acts as slave: BUSY becomes an input that must be driven by a master device to stall writes during arbitration. This enables scalable cascading of multiple 7024L25PFI8 devices for wider data buses without external logic.

What is the purpose of the semaphore (SEM) function in the 7024L25PFI8?

The 7024L25PFI8 includes eight dedicated hardware semaphore flags accessed via A0–A2 and controlled by SEML/SEMR. These provide atomic set/clear/read operations to coordinate shared resources between processors - eliminating race conditions and reducing software overhead versus polling-based synchronization methods.

Can the 7024L25PFI8 perform simultaneous reads from both ports to the same memory location?

Yes, the 7024L25PFI8 uses true dual-port memory cells that allow completely independent, simultaneous reads from both left and right ports to any identical address - with no arbitration delay or data corruption. This is a fundamental architectural feature confirmed in the Functional Block Diagram and Truth Tables of the IDT datasheet.