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

Renesas 70V24L25PFI8

Name: 70V24L25PFI8
Brand: Renesas
SKU: 70V24L25PFI8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V24L25PFI8

Manufacturer:: Renesas

Category:: Memory

Package:: 100-LQFP

Datasheet:: 70V24L25PFI8.pdf

Description:: IC SRAM 64KBIT PARALLEL 100TQFP

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Product details

Overview

70V24L25PFI8 from Integrated Device Technology (IDT) is an industrial-grade, 4K x 16-bit true dual-port static RAM with independent left/right asynchronous ports, 25 ns access time, 3.3 V single-supply operation, and integrated semaphore arbitration logic - used in real-time inter-processor communication systems such as radar signal processors and avionics data concentrators.

For engineers reviewing the 70V24L25PFI8 datasheet, 70V24L25PFI8 pinout, 70V24L25PFI8 application, or 70V24L25PFI8 equivalent, key selection criteria include dual-port bus contention handling, low-power standby current (660 µA), industrial temperature range (−40°C to +85°C), and PLCC-84 package compatibility with legacy military/aerospace PCB layouts.

Technical Context

The 70V24L25PFI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling simultaneous read/write operations to the same memory location without external arbitration. Its on-chip semaphore logic supports eight hardware flags accessed via A0–A2, with dedicated SEM, INT, and BUSY signaling for master/slave coordination.

It uses CMOS high-performance fabrication for low active power (380 mW typ.) and ultra-low standby power (660 µA typ.), with TTL-compatible inputs and LVTTL-level outputs. The device supports cascaded 32-bit+ memory expansion using M/S select and includes automatic power-down via CE control per port.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	4K × 16-bit (64 Kbit), true dual-port SRAM with independent left/right ports
Access Time	25 ns max - guarantees deterministic latency for real-time interrupt response in embedded control loops
Supply Voltage	3.3 V ± 0.3 V - compatible with modern low-voltage digital systems; no level-shifting required
Operating Temperature	−40°C to +85°C - qualified for industrial and extended-temperature avionics applications
Standby Current	660 µA typ. - enables battery-backed operation in always-on monitoring subsystems
Package	84-pin PLCC (PLG84) - through-hole mount suitable for high-reliability, vibration-resistant assemblies
Bus Width Control	Separate UBL/LBL pins - allows byte-selective access for mixed 8/16-bit peripheral interfacing

Pinout & Package

84-pin Plastic Leaded Chip Carrier (PLG84), body size ≈ 1.15 in × 1.15 in × 0.17 in, lead pitch 0.05 in, RoHS-compliant "green" variant.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A11L	Left port address inputs	12-bit address bus for left-side memory access; A12L is NC
A0R–A11R	Right port address inputs	12-bit address bus for right-side memory access; A12R is NC
I/O0L–I/O7L, I/O0R–I/O7R	Lower-byte bidirectional data	8-bit lower data path per port; controlled by LBL/LBR
I/O8L–I/O15L, I/O8R–I/O15R	Upper-byte bidirectional data	8-bit upper data path per port; controlled by UBL/UBR
CEL, CER	Chip enable (active low)	Independent port enable; deassertion places port in low-power standby
OEL, OER	Output enable (active low)	Controls output drivers; high-Z when disabled to prevent bus contention
R/WL, R/WR	Read/write control	Active-low; determines direction of data flow on respective port
SEML, SEMR	Semaphore enable	Enables access to eight hardware semaphore flags via I/O0 and A0–A2
INTL, INTR	Interrupt flag outputs	Push-pull, non-tri-stated; signals semaphore or write completion events
BUSYL, BUSYR	Busy status signals	Master outputs / slave inputs; indicates port contention during simultaneous access
M/S	Master/slave select	VIL = slave (BUSY input); VIH = master (BUSY output) for cascaded configurations
VDD, VSS	Power and ground	Multiple VDD/VSS pins require local decoupling; all must be connected

Key Features

Feature	Design Value
True dual-port memory cells	Enables simultaneous reads/writes to identical addresses - eliminates software polling or lock-step synchronization
On-chip semaphore logic	Eight hardware flags accessible via A0–A2 and I/O0; resolves resource contention without external logic or CPU intervention
Independent port power control	Per-port CE enables selective shutdown - reduces system power by >95% when one processor is idle
Master/slave cascade support	M/S pin configures BUSY as input/output; allows error-free 32-bit+ memory expansion with no glue logic
LVTTL-compatible interface	3.3 V operation with VIH ≥ 2.0 V and VIL ≤ 0.8 V - interoperable with FPGA I/O banks and microcontroller GPIOs

Applications

Radar Signal Processing	Avionics Data Concentrator
Use Scenario: Real-time exchange of FFT coefficients and threshold data between ADC front-end and DSP engine. IC Role / Device Role / Timing Role: Shared memory buffer with deterministic 25 ns access; BUSY/INT signals coordinate pipeline handshaking. Use Value: Eliminates FIFO overflow risk during burst-mode sampling; supports 40 MSPS sustained throughput with zero-cycle arbitration delay.	Use Scenario: Aggregation of sensor telemetry (IMU, pressure, temp) from multiple LRUs into a central flight management unit. IC Role / Device Role / Timing Role: Dual-port SRAM acting as time-stamped message queue; left port writes sensor frames, right port reads for packetization. Use Value: Prevents data loss during transient bus congestion; semaphore flags ensure atomic update of shared status registers.
Industrial PLC Backplane	Military Radio Baseband
Use Scenario: Inter-CPU communication between motion control and HMI modules across isolated CAN and Ethernet domains. IC Role / Device Role / Timing Role: Memory-mapped inter-processor mailbox; left port tied to ARM Cortex-M7, right port to RISC-V co-processor. Use Value: Enables deterministic <10 µs context-switch latency; PLCC-84 package withstands thermal cycling in factory-floor enclosures.	Use Scenario: Shared buffer between RF transceiver ASIC and encryption processor in SATCOM terminal. IC Role / Device Role / Timing Role: Dual-port SRAM storing encrypted payload fragments; semaphore-controlled access prevents cipher key exposure during concurrent read/write. Use Value: Meets MIL-STD-810G vibration requirements; 660 µA standby current extends battery life in manpack radios.

Radar Signal Processing

Avionics Data Concentrator

Use Scenario: Real-time exchange of FFT coefficients and threshold data between ADC front-end and DSP engine.

IC Role / Device Role / Timing Role: Shared memory buffer with deterministic 25 ns access; BUSY/INT signals coordinate pipeline handshaking.

Use Value: Eliminates FIFO overflow risk during burst-mode sampling; supports 40 MSPS sustained throughput with zero-cycle arbitration delay.

Use Scenario: Aggregation of sensor telemetry (IMU, pressure, temp) from multiple LRUs into a central flight management unit.

IC Role / Device Role / Timing Role: Dual-port SRAM acting as time-stamped message queue; left port writes sensor frames, right port reads for packetization.

Use Value: Prevents data loss during transient bus congestion; semaphore flags ensure atomic update of shared status registers.

Industrial PLC Backplane

Military Radio Baseband

Use Scenario: Inter-CPU communication between motion control and HMI modules across isolated CAN and Ethernet domains.

IC Role / Device Role / Timing Role: Memory-mapped inter-processor mailbox; left port tied to ARM Cortex-M7, right port to RISC-V co-processor.

Use Value: Enables deterministic <10 µs context-switch latency; PLCC-84 package withstands thermal cycling in factory-floor enclosures.

Use Scenario: Shared buffer between RF transceiver ASIC and encryption processor in SATCOM terminal.

IC Role / Device Role / Timing Role: Dual-port SRAM storing encrypted payload fragments; semaphore-controlled access prevents cipher key exposure during concurrent read/write.

Use Value: Meets MIL-STD-810G vibration requirements; 660 µA standby current extends battery life in manpack radios.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C024AV-25AXC	4K × 16-bit, 25 ns, 3.3 V, TQFP-100 package; no M/S cascade mode; higher ISB1 (25 mA vs. 11 mA)	Requires PCB redesign due to 100-pin TQFP; lacks native master/slave BUSY protocol for multi-chip expansion	Select when board space permits TQFP and system uses single-device memory mapping without cascading.
IDT70V24L15PF	Same PLCC-84 package and pinout; 15 ns access time; industrial grade; higher IDD (140 mA vs. 115 mA typ.)	Delivers faster timing for cycle-critical loops but increases thermal load in sealed enclosures	Select when sub-20 ns latency is mandatory and thermal margin allows higher active power.

Compared with CY7C024AV-25AXC and IDT70V24L15PF, the 70V24L25PFI8 uniquely balances industrial temperature reliability, ultra-low standby current, and plug-compatible PLCC-84 footprint - making it optimal for retrofitting legacy avionics and ruggedized control systems where layout change is prohibited.

Availability

70V24L25PFI8 is available at Aetrix Electronics and suitable for radar signal processing, avionics data concentrators, and industrial PLC backplanes requiring stable component supply across extended product lifecycles.

Supply support for 70V24L25PFI8 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

Integrated Device Technology (IDT), now part of Renesas Electronics, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The IDT70V24 family delivers radiation-tolerant, temperature-hardened dual-port SRAMs optimized for deterministic real-time inter-processor communication in safety-critical aerospace and defense platforms.

FAQ

What is the maximum operating temperature range for the 70V24L25PFI8?

The 70V24L25PFI8 is rated for industrial temperature operation from −40°C to +85°C. This specification is validated per IDT's DSC-5624/10 datasheet and applies across all DC and AC parameters. The 70V24L25PFI8 maintains full functionality-including 25 ns access time and 660 µA standby current-within this range, making it suitable for under-hood automotive ECUs and airborne mission computers where ambient thermal stress is extreme.

Does the 70V24L25PFI8 support true simultaneous read/write to the same memory address?

Yes, the 70V24L25PFI8 implements true dual-port SRAM cells that allow concurrent read and write operations to the identical memory location without corruption or arbitration delay. This behavior is inherent to its physical cell design-not dependent on external logic-and is confirmed in the Functional Block Diagram and Truth Table I of the IDT70V24 datasheet. The 70V24L25PFI8 leverages this capability to enable lock-free inter-processor messaging in real-time systems.

How does the BUSY signal function in master/slave configuration with the 70V24L25PFI8?

In master/slave cascaded systems, the M/S pin configures the BUSY pin: when M/S = VIH, BUSY operates as an output flag indicating port contention; when M/S = VIL, BUSY becomes an input that synchronizes slave operation to master timing. This dual-role behavior is explicitly defined in Note 2 of the Pin Configurations section and enables seamless 32-bit+ memory expansion using multiple 70V24L25PFI8 devices without external handshake logic.

What is the standby current consumption of the 70V24L25PFI8, and under what conditions is it measured?

The 70V24L25PFI8 exhibits 660 µA typical standby current (ISB3) when both ports are fully disabled-i.e., CEL and CER held > VDD − 0.2 V, all inputs at rail, and f = 0. This ultra-low value is specified in Table 09b of the datasheet and reflects CMOS-level input biasing. It enables energy-sensitive applications like battery-backed flight data recorders, where the 70V24L25PFI8 retains valid state for >10 years on a single coin cell.

Is the 70V24L25PFI8 pin-compatible with other members of the IDT70V24 family?

Yes, the 70V24L25PFI8 shares identical PLCC-84 pinout and signal mapping with all IDT70V24 variants including 70V24L15PF and 70V24S25PF. Differences are limited to speed grade (15/25/35/55 ns), power suffix (S/L), and temperature grade (commercial/industrial), all encoded in the part number suffix. This allows drop-in replacement within the same package footprint-critical for sustaining legacy designs where PCB revision is cost-prohibitive.

70V24L25PFI8 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:: 64Kbit

Memory Organization:: 4K x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 25ns

Access Time:: 25 ns

Voltage - Supply:: 3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

70V24L25PFI8 FAQ

1.How can I place an order for 70V24L25PFI8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V24L25PFI8 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 70V24L25PFI8 reliable?

The price and inventory of 70V24L25PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24L25PFI8 is usually 5 days.

3.What payment methods are accepted for 70V24L25PFI8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24L25PFI8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 70V24L25PFI8?

70V24L25PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V24L25PFI8 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 70V24L25PFI8?

For technical support, including 70V24L25PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24L25PFI8 requirements.

6.How does Aetrix verify that 70V24L25PFI8 is sourced from the original manufacturer or authorized distributors?

All 70V24L25PFI8 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 70V24L25PFI8 meets industry standards.

7.What is the process for return or replacement of 70V24L25PFI8?

All 70V24L25PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V24L25PFI8, 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 70V24L25PFI8 part is unused and in its original packaging.

Return procedure for 70V24L25PFI8:

1.Submit a request within 90 days.

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

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