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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas 7025S25PFI8

Name: 7025S25PFI8
Brand: Renesas
SKU: 7025S25PFI8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7025S25PFI8

Manufacturer:: Renesas

Category:: Memory

Package:: 100-LQFP

Datasheet:: 7025S25PFI8.pdf

Description:: IC SRAM 128KBIT PARALLEL 100TQFP

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Product details

Overview

7025S25PFI8 from IDT (Integrated Device Technology) is a high-speed, 8K × 16-bit true dual-port static RAM with independent asynchronous left/right ports, 25 ns maximum read cycle time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It enables simultaneous read access to the same memory location and supports master/slave cascading for 32-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the 7025S25PFI8 datasheet, 7025S25PFI8 pinout, 7025S25PFI8 application, or 7025S25PFI8 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-grade timing behavior, dual-port arbitration logic details, and direct alternatives for memory subsystem design in avionics, test equipment, and FPGA co-processor interfaces.

Technical Context

The 7025S25PFI8 implements fully asynchronous dual-port architecture with on-chip port arbitration, semaphore signaling, and BUSY flag logic for conflict resolution. Its left and right ports feature separate address (A0L–A12L / A0R–A12R), data (I/O0L–I/O15L / I/O0R–I/O15R), and control lines (CEL/CER, R/WL/R/WR, OEL/OER, UBL/UBR, LBL/LBR).

It supports battery backup operation at 2V with data retention, uses CMOS high-performance fabrication, and integrates dedicated interrupt (INTL/INTR) and semaphore (SEML/SEMR) control paths. The M/S pin configures master (BUSY output) or slave (BUSY input) mode for multi-device synchronization without external logic.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	8K × 16-bit (128 Kbit), true dual-port SRAM with independent left/right access paths
Access Time (tRC)	25 ns max - guarantees full-speed read/write cycle timing for deterministic real-time systems
Supply Voltage	5.0 V ±10% - compatible with legacy TTL and 5V microcontroller/FPGA I/O domains
Operating Temperature	–40°C to +85°C - qualified for industrial environments without derating
Power Consumption	Active: 155 mA typ (both ports); Standby (ISB1): 16 mA typ - enables low-idle-power system states
Data Retention	2 V minimum - supports battery-backed operation during main power loss
Package	100-pin Thin Quad Flatpack (TQFP) - surface-mount compatible with automated PCB assembly

Pinout & Package

7025S25PFI8 is housed in a 100-pin Thin Quad Flatpack (TQFP) package, measuring 14 mm × 14 mm × 1.4 mm, with gull-wing leads and standard JEDEC MO-159 footprint. All VCC and GND pins require proper decoupling per layout guidelines.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A12L	Left Port Address Inputs	13-bit address bus for left-side memory access (8K = 2¹³)
A0R–A12R	Right Port Address Inputs	Independent 13-bit address bus for concurrent right-side access
I/O0L–I/O15L	Left Port Data I/O	16-bit bidirectional data path; byte-selectable via UBL/LBL
I/O0R–I/O15R	Right Port Data I/O	16-bit bidirectional data path; fully asynchronous from left port
CEL / CER	Chip Enable (Left/Right)	Active-low enables respective port; deactivation enters low-power standby
R/WL / R/WR	Read/Write Control (Left/Right)	Active-low write; high = read or high-impedance output
OEL / OER	Output Enable (Left/Right)	Controls tri-state of I/O drivers independently per port
UBL / UBR	Upper-Byte Select	Enables I/O8–I/O15 only; supports multiplexed 8-bit bus interfacing
LBL / LBR	Lower-Byte Select	Enables I/O0–I/O7 only; enables byte-level granularity
SEML / SEMR	Semaphore Enable	Activates on-chip semaphore register access (8 flags, addressed by A0–A2)
INTL / INTR	Interrupt Flag Output	Open-drain push-pull flag indicating inter-port event (e.g., semaphore set)
BUSYL / BUSYR	Busy Flag (Master/Slave)	When M/S = H: BUSYR outputs contention signal; when M/S = L: BUSYL inputs BUSYR
M/S	Master/Slave Select	Configures device role in cascaded systems; determines BUSY directionality

Key Features

Feature	Design Value
True Dual-Port Architecture	Enables simultaneous reads/writes from independent left and right ports without arbitration delay
On-Chip Semaphore Logic	Eight hardware semaphore flags accessible via A0–A2, eliminating external lock management logic
Full Port Arbitration	Automatic BUSY flag assertion and priority resolution prevent data corruption during address contention
Master/Slave Cascading	Supports 32-bit+ data bus expansion using M/S pin and BUSY chaining-no glue logic required
Battery Backup Mode	Retains valid data at 2V supply, enabling seamless failover in power-interrupt-critical applications

Applications

Avionics Flight Control Systems	Digital Signal Test Equipment
Use Scenario: Real-time exchange of sensor data and actuator commands between flight computer and safety monitor processor. IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized shared memory buffer with deterministic 25 ns access for lock-free inter-processor communication. Use Value: Eliminates software mutex overhead and ensures sub-30 ns worst-case latency for critical control loops.	Use Scenario: High-speed waveform capture and pattern generation in automated test equipment (ATE) with parallel stimulus/response paths. IC Role / Device Role / Timing Role: Provides concurrent access to acquisition memory (left port) and pattern memory (right port) for overlapped test cycles. Use Value: Enables 40 MHz sustained data throughput without pipeline stalls or external arbitration logic.
FPGA-Based Protocol Analyzers	Industrial PLC Motion Controllers
Use Scenario: Capturing and decoding multi-lane serial protocols (e.g., PCIe, SATA) where one FPGA core handles packet parsing while another performs real-time filtering. IC Role / Device Role / Timing Role: Acts as zero-wait-state buffer between two clock domains, with semaphore flags coordinating descriptor updates. Use Value: Guarantees atomic descriptor handoff and prevents race conditions across asynchronous logic blocks.	Use Scenario: Synchronizing motion trajectory tables between PLC CPU and dedicated motion engine ASIC in CNC machinery. IC Role / Device Role / Timing Role: Shared memory interface with BUSY-controlled write protection ensures trajectory updates occur only during non-execution windows. Use Value: Prevents mid-cycle parameter corruption and maintains ±1 µs jitter tolerance in servo loop timing.

Avionics Flight Control Systems

Digital Signal Test Equipment

Use Scenario: Real-time exchange of sensor data and actuator commands between flight computer and safety monitor processor.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized shared memory buffer with deterministic 25 ns access for lock-free inter-processor communication.

Use Value: Eliminates software mutex overhead and ensures sub-30 ns worst-case latency for critical control loops.

Use Scenario: High-speed waveform capture and pattern generation in automated test equipment (ATE) with parallel stimulus/response paths.

IC Role / Device Role / Timing Role: Provides concurrent access to acquisition memory (left port) and pattern memory (right port) for overlapped test cycles.

Use Value: Enables 40 MHz sustained data throughput without pipeline stalls or external arbitration logic.

FPGA-Based Protocol Analyzers

Industrial PLC Motion Controllers

Use Scenario: Capturing and decoding multi-lane serial protocols (e.g., PCIe, SATA) where one FPGA core handles packet parsing while another performs real-time filtering.

IC Role / Device Role / Timing Role: Acts as zero-wait-state buffer between two clock domains, with semaphore flags coordinating descriptor updates.

Use Value: Guarantees atomic descriptor handoff and prevents race conditions across asynchronous logic blocks.

Use Scenario: Synchronizing motion trajectory tables between PLC CPU and dedicated motion engine ASIC in CNC machinery.

IC Role / Device Role / Timing Role: Shared memory interface with BUSY-controlled write protection ensures trajectory updates occur only during non-execution windows.

Use Value: Prevents mid-cycle parameter corruption and maintains ±1 µs jitter tolerance in servo loop timing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C136-25JC	5V, 8K × 16, 25 ns access; 84-pin PLCC; no integrated semaphore logic	Lacks on-chip semaphores and BUSY arbitration - requires external logic for multi-processor sync	Choose when board space allows discrete arbitration and cost sensitivity outweighs integration benefit
AS7C38096A-25JC	5V, 8K × 16, 25 ns; 100-pin TQFP; supports only single-port operation unless externally mirrored	No native dual-port capability - requires two devices and external multiplexing for true concurrency	Select only if existing design already uses AS7C family and dual-port requirement is minimal or software-managed

Compared with CY7C136-25JC and AS7C38096A-25JC, the 7025S25PFI8 delivers hardware-enforced inter-port coordination, reducing BOM count by up to 3 discrete logic ICs and eliminating timing-critical PCB routing for arbitration signals.

Availability

7025S25PFI8 is available at Aetrix Electronics and suitable for avionics flight control systems, digital signal test equipment, and industrial PLC motion controllers requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.

Supply support for 7025S25PFI8 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, and interface solutions, now part of Renesas Electronics since 2019.

The 7025S25PFI8 belongs to IDT's legacy high-speed dual-port SRAM product line, engineered for deterministic real-time systems where concurrent memory access, hardware arbitration, and industrial reliability are mandatory.

FAQ

What is the operating voltage range for the 7025S25PFI8?

The 7025S25PFI8 operates from 4.5 V to 5.5 V (5.0 V ±10%) across its full industrial temperature range (–40°C to +85°C). It also supports data retention down to 2.0 V, enabling battery backup functionality without external voltage supervision circuitry. This dual-voltage capability is explicitly specified in the DC Electrical Characteristics table of the official datasheet.

Does the 7025S25PFI8 support true simultaneous read operations from both ports?

Yes, the 7025S25PFI8 supports true simultaneous reads from both left and right ports-even to the same memory location-without contention or arbitration delay. This behavior is enabled by its true dual-ported memory cell architecture and is confirmed in the "Features" section and Functional Block Diagram of the datasheet. No BUSY assertion occurs during concurrent reads.

How does the M/S pin affect BUSY signal behavior on the 7025S25PFI8?

When M/S = HIGH, the 7025S25PFI8 operates as a master: BUSYR is an output that asserts during port contention. When M/S = LOW, it operates as a slave: BUSYL becomes an input that accepts BUSYR from a master device. This configuration enables daisy-chained arbitration in multi-device systems, as documented in Note 1 of the Functional Block Diagram and Pin Names table.

What is the purpose of the semaphore function in the 7025S25PFI8?

The 7025S25PFI8 integrates eight hardware semaphore flags accessible via I/O0–I/O15 and addressed by A0–A2. These flags provide atomic lock/unlock signaling between ports, eliminating software-based mutual exclusion and preventing race conditions. Semaphore read/write timing (tSOP, tSAA) is fully characterized in Tables 12–13 of the datasheet.

Is the 7025S25PFI8 pin-compatible with other speed grades in the 7025S/L family?

Yes, all 7025S/L variants-including 7025S15, 7025S17, 7025S20, and 7025S25-share identical 100-pin TQFP pinout, electrical interface, and functional mapping. Only AC timing parameters differ; no PCB redesign is needed when upgrading or downgrading speed grade, as confirmed in the Pin Configurations section and ordering information tables.

7025S25PFI8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 100-LQFP

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 128Kbit

Memory Organization:: 8K x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 25ns

Access Time:: 25 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 100-TQFP (14x14)

7025S25PFI8 FAQ

1.How can I place an order for 7025S25PFI8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 7025S25PFI8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 7025S25PFI8 reliable?

The price and inventory of 7025S25PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7025S25PFI8 is usually 5 days.

3.What payment methods are accepted for 7025S25PFI8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7025S25PFI8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7025S25PFI8?

7025S25PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7025S25PFI8 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 7025S25PFI8?

For technical support, including 7025S25PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7025S25PFI8 requirements.

6.How does Aetrix verify that 7025S25PFI8 is sourced from the original manufacturer or authorized distributors?

All 7025S25PFI8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 7025S25PFI8 meets industry standards.

7.What is the process for return or replacement of 7025S25PFI8?

All 7025S25PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7025S25PFI8, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 7025S25PFI8 part is unused and in its original packaging.

Return procedure for 7025S25PFI8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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