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Renesas 70V24S25PFI
- Part No.:
- 70V24S25PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V24S25PFI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,514
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Product details
Overview
70V24S25PFI from Integrated Device Technology (IDT) is a high-speed 4K x 16 true dual-port static RAM with independent left/right ports, 25 ns maximum access time (commercial temperature range), 3.3 V single-supply operation, and full on-chip semaphore arbitration logic. It enables simultaneous asynchronous read/write access to the same memory location in real-time communication systems and FPGA co-processor interfaces.
For engineers reviewing the 70V24S25PFI datasheet, 70V24S25PFI pinout, 70V24S25PFI application, or 70V24S25PFI equivalent, key selection criteria include its 84-pin PLCC package, industrial-grade -40°C to +85°C operating range, BUSY/INT flag support for port contention resolution, and compatibility with LVTTL-level control signals.
Technical Context
The 70V24S25PFI implements fully asynchronous dual-port architecture with separate address, data, and control buses per port - enabling concurrent read/write operations without external arbitration logic. Its on-chip semaphore logic supports eight shared flags addressed via A0–A2, allowing inter-processor synchronization in master/slave configurations.
It features independent chip enable (CEL/CER), read/write (R/WL/R/WR), output enable (OEL/OER), upper/lower byte select (UBL/UBR, LBL/LBR), and master/slave (M/S) inputs - with BUSYL/BUSYR and INTL/INTR push-pull outputs for real-time status signaling. All I/Os are LVTTL-compatible at 3.3 V ±0.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K x 16 bits (64 Kbit total), true dual-port SRAM |
| Access Time (max) | 25 ns - guarantees deterministic latency for real-time bus bridging |
| Supply Voltage | 3.3 V ±0.3 V - compatible with modern low-voltage digital systems |
| Operating Temperature | -40°C to +85°C - qualified for industrial embedded applications |
| Power Consumption | Active: 400 mW (typ.), Standby: 3.3 mW (typ.) - enables low-power system sleep modes |
| Package | 84-pin PLCC (PLG84) - through-hole mountable, 1.15" × 1.15" footprint |
| I/O Interface | LVTTL-compatible - direct interfacing with FPGAs, microcontrollers, and ASICs |
Pinout & Package
70V24S25PFI is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC, package code PLG84), body size ≈ 1.15 in × 1.15 in × 0.17 in, with gull-wing leads suitable for through-hole assembly and rework-friendly socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access (4K = 2¹²) |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access - fully independent |
| I/O0L–I/O7L, I/O0R–I/O7R | Lower-byte data I/O (8-bit) | Supports byte-wide transfers; LBL/LBR enables selective lower-byte access |
| I/O8L–I/O15L, I/O8R–I/O15R | Upper-byte data I/O (8-bit) | Enables 16-bit wide data path; UBL/UBR enables selective upper-byte access |
| CEL / CER | Chip enable (left/right) | Independent port activation - allows one port active while other enters standby |
| R/WL / R/WR | Read/write control (left/right) | Asynchronous write strobe; no clock required - simplifies timing-critical designs |
| OEL / OER | Output enable (left/right) | Tri-state control per port - prevents bus contention during shared-bus operation |
| SEML / SEMR | Semaphore enable (left/right) | Activates 8-flag semaphore register for inter-processor coordination |
| BUSYL / BUSYR | Busy flag (input on slave, output on master) | Hardware handshake signal indicating port contention - eliminates software polling |
| INTL / INTR | Interrupt flag (push-pull) | Asserted on semaphore acquisition or write completion - triggers CPU interrupt |
| M/S | Master/Slave select | Configures device role in cascaded systems - enables 32-bit+ bus expansion |
| VDD / VSS | Power and ground | Multiple dedicated pins ensure stable 3.3 V supply and low-noise grounding |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads/writes to identical addresses - essential for FIFO buffering and shared-memory IPC |
| On-chip semaphore logic | Eight hardware-managed flags accessible via A0–A2 - eliminates need for external semaphores or software locks |
| Automatic power-down mode | CE-controlled standby reduces current to 3.3 mW (typ.) - extends battery life in portable industrial controllers |
| Separate upper/lower byte controls | UBL/LBL and UBR/LBR allow 8-bit sub-word access - matches legacy 8-bit peripherals and microcontrollers |
| Master/Slave cascade capability | M/S pin configures BUSY as input (slave) or output (master) - enables error-free 32-bit+ memory expansion |
Applications
| Industrial PLC Communication Module | FPGA-Based Video Frame Buffer |
|---|---|
Use Scenario: Dual-CPU architecture where ARM host and DSP co-processor exchange sensor data and control commands via shared memory. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore arbitration to prevent race conditions during concurrent access. Use Value: Eliminates software mutex overhead and guarantees sub-25 ns memory access latency for deterministic real-time response. | Use Scenario: High-resolution video capture system using FPGA to acquire frames and ARM processor to encode and transmit. IC Role / Device Role / Timing Role: Frame buffer memory accessed simultaneously by FPGA (write) and ARM (read) without external arbitration logic. Use Value: Enables seamless frame handoff with zero-cycle bus turnaround - critical for 60 fps uncompressed video streaming. |
| Avionics Data Concentrator Unit | Medical Imaging Signal Processor |
Use Scenario: ARINC 429 interface module aggregating sensor data from multiple avionics subsystems into a central flight computer. IC Role / Device Role / Timing Role: Dual-port SRAM acting as time-stamped data staging buffer between discrete input receivers and time-triggered scheduler. Use Value: 25 ns access time ensures deterministic sampling of high-frequency analog-to-digital streams without jitter-induced data loss. | Use Scenario: MRI signal chain where FPGA digitizes RF echoes and DSP performs real-time Fourier transforms before storage. IC Role / Device Role / Timing Role: Low-latency memory bridge between high-speed ADC interface and compute-intensive DSP pipeline. Use Value: LVTTL compatibility and 3.3 V operation simplify integration with radiation-tolerant FPGAs; PLCC package supports conformal coating for medical EMC compliance. |
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, 25 ns, 3.3 V, 100-pin TQFP - higher pin count, no M/S cascade support | Designed for standalone use; lacks master/slave BUSY handshake for multi-device expansion | Select when board layout accommodates TQFP and system requires only single-device implementation |
| IDT70V25S25PF | 8K × 18, 25 ns, 3.3 V, 100-pin TQFP - larger density, wider data bus, different pinout | Targeted at 36-bit bus systems; incompatible pin mapping and address depth | Select when 128 Kbit capacity and 18-bit word width are required, and PCB redesign is feasible |
Compared with CY7C024AV-25AXC and IDT70V25S25PF, the 70V24S25PFI uniquely combines 84-pin PLCC packaging, master/slave cascade capability via M/S pin, and industrial temperature rating - making it optimal for space-constrained, multi-device, ruggedized embedded systems requiring field-upgradable memory modules.
Availability
70V24S25PFI is available at Aetrix Electronics and suitable for industrial PLC communication modules, FPGA-based video frame buffers, avionics data concentrators, and medical imaging signal processors requiring stable component supply across extended product lifecycles.
Supply support for 70V24S25PFI 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, is a fabless semiconductor company specializing in timing, memory interface, RF, and power management ICs for communications, computing, and industrial markets.
The IDT70V24 family was designed specifically for high-reliability dual-ported memory applications in real-time embedded systems - emphasizing deterministic timing, hardware arbitration, and industrial-grade thermal performance.
FAQ
What is the maximum operating temperature range for the 70V24S25PFI?
The 70V24S25PFI is rated for industrial temperature operation from -40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings and Operating Conditions tables of the official IDT datasheet DSC-5624/10. The 'PFI' suffix explicitly denotes the industrial-grade temperature qualification, distinguishing it from commercial-only variants.
Does the 70V24S25PFI support true simultaneous read/write operations on both ports?
Yes, the 70V24S25PFI implements true dual-port SRAM architecture, allowing independent and fully asynchronous read or write operations on the left and right ports - including simultaneous access to the same memory address. This capability is enabled by dedicated memory cell design and on-chip arbitration, as documented in the Functional Block Diagram and Features section of the IDT70V24 datasheet.
What is the function of the M/S pin on the 70V24S25PFI?
The M/S (Master/Slave) pin on the 70V24S25PFI configures BUSY signal behavior: when pulled high (VIH), BUSY functions as an output flag indicating port contention (Master mode); when pulled low (VIL), BUSY becomes an input for daisy-chained arbitration (Slave mode). This enables scalable multi-device memory expansion without external logic, as specified in Note 2 of the Pin Names table.
How many semaphore flags does the 70V24S25PFI provide, and how are they accessed?
The 70V24S25PFI provides eight hardware semaphore flags, addressed using address lines A0–A2. Semaphore access is enabled by asserting SEM = VIL while holding CE = VIH or UB & LB = VIH, as defined in Truth Table II and the AC Electrical Characteristics section of the datasheet. All I/O pins reflect the semaphore value during read operations.
Is the 70V24S25PFI pin-compatible with other members of the IDT70V24 family?
No - the 70V24S25PFI uses an 84-pin PLCC (PLG84) package, whereas IDT70V24 variants like 70V24S15PFI or 70V24L25PFI share the same pinout only within the PLCC variant group. It is not pin-compatible with 100-pin TQFP-packaged IDT70V25/24 devices due to differing pin counts, signal assignments, and package dimensions.
70V24S25PFI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- 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)
70V24S25PFI FAQ
1.How can I place an order for 70V24S25PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24S25PFI 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 70V24S25PFI reliable?
The price and inventory of 70V24S25PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24S25PFI is usually 5 days.
3.What payment methods are accepted for 70V24S25PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24S25PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24S25PFI?
70V24S25PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24S25PFI 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 70V24S25PFI?
For technical support, including 70V24S25PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24S25PFI requirements.
6.How does Aetrix verify that 70V24S25PFI is sourced from the original manufacturer or authorized distributors?
All 70V24S25PFI 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 70V24S25PFI meets industry standards.
7.What is the process for return or replacement of 70V24S25PFI?
All 70V24S25PFI units undergo pre-shipment inspection (PSI). If there is an issue with 70V24S25PFI, 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 70V24S25PFI part is unused and in its original packaging.
Return procedure for 70V24S25PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V24S25PFI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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