Renesas 7025L17PF8

Overview

7025L17PF8 from IDT is a high-speed 8K × 16 (128 Kbit) true dual-port static RAM with independent asynchronous left/right ports, 17 ns maximum read cycle time, 1 µA typical standby current, and TTL-compatible 5 V ±10% operation - used in real-time embedded systems requiring concurrent memory access, such as digital signal processors interfacing with host controllers.

For engineers reviewing the 7025L17PF8 datasheet, 7025L17PF8 pinout, 7025L17PF8 application, or 7025L17PF8 equivalent, key selection considerations include dual-port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S = VIH/VIL, semaphore support for inter-processor synchronization, and 2 V data retention capability in battery backup mode.

Technical Context

The 7025L17PF8 implements full hardware port arbitration with dedicated BUSY output (Master) or input (Slave), enabling deterministic conflict resolution when both ports access the same address. Its on-chip semaphore logic supports eight flags addressed via A0–A2, accessed using SEM = VIL while CE or byte enables are high.

It operates fully asynchronously per port, with separate R/W, CE, OE, UB/LB, and interrupt controls for each side. The device uses CMOS technology to achieve 750 mW typical active power and 1 µA full standby current (ISB3) at VCC ≥ 4.8 V, meeting industrial temperature range requirements (–40°C to +85°C).

Key Specifications

Pinout & Package

7025L17PF8 is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC, code PLG84), with dual-row gull-wing leads, surface-mount compatible, and rated for industrial temperature operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-15VC and AS7C38097A-17PC, the 7025L17PF8 uniquely combines industrial temperature operation, 2 V data retention, and full hardware arbitration - making it the only drop-in solution for safety-critical, battery-backed, multi-processor embedded systems requiring guaranteed contention resolution.

Availability

7025L17PF8 is available at Aetrix Electronics and suitable for telecom infrastructure, avionics display systems, and industrial motor control applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 7025L17PF8 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 IDT7025 product line was designed specifically for high-reliability, real-time embedded systems requiring deterministic dual-port memory access - targeting aerospace, industrial automation, and communications equipment where concurrent read/write integrity is non-negotiable.

FAQ

What is the maximum operating temperature range for the 7025L17PF8?

The 7025L17PF8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the DC Operating Conditions table (Table 5) and explicitly stated in the "Industrial temperature range (–40°C to +85°C) is available for selected speeds" feature list. This makes it suitable for deployment in harsh environmental conditions without derating.

Does the 7025L17PF8 support battery backup operation, and what is the minimum retention voltage?

Yes, the 7025L17PF8 supports battery backup operation with a minimum data retention voltage of 2.0 V, as specified in Table 10 (VDR = 2.0 V). This capability is exclusive to the "L" (low-power) variant and enables reliable state preservation during main power interruption - a key requirement in fail-safe embedded systems.

How does the M/S pin affect BUSY signal behavior on the 7025L17PF8?

When M/S = H (high), the 7025L17PF8 operates as Master: BUSYL and BUSYR become outputs that assert during address contention. When M/S = L (low), it operates as Slave: BUSYL and BUSYR become inputs used to synchronize writes with the Master's BUSY assertion - a hardware-controlled arbitration mechanism defined in the Functional Block Diagram and Truth Tables.

Can the 7025L17PF8 be used in a 32-bit data path configuration, and how is this achieved?

Yes, the 7025L17PF8 supports 32-bit expansion via Master/Slave cascading. Two devices are connected with M/S = H on the first (Master) and M/S = L on the second (Slave); the BUSY output of the Master drives the BUSY input of the Slave, enabling coordinated access without external logic - as described in the "IDT7025 easily expands data bus width to 32 bits or more" feature and Figure 2683 drw 02.

What are the key timing parameters governing semaphore flag access on the 7025L17PF8?

Semaphore access requires SEM = VIL while CE or both byte enables are high. Key timing parameters include tSOP (10 ns semaphore update pulse width), tSAA (17 ns semaphore address access), tSWRD (5 ns write-to-read delay), and tSPS (5 ns contention window), all specified in Tables 12a/b and 13a/b - ensuring fast, deterministic inter-processor signaling without software overhead.