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Renesas 70V24L25PF8
- Part No.:
- 70V24L25PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V24L25PF8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,306
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Product details
Overview
70V24L25PF8 from Integrated Device Technology (IDT) is a high-speed 4K x 16 true dual-port static RAM with independent left/right asynchronous ports, 25 ns read/write cycle time, 3.3 V single-supply operation, and integrated semaphore arbitration logic - used in real-time inter-processor communication systems requiring concurrent memory access without external logic.
For engineers reviewing the 70V24L25PF8 datasheet, 70V24L25PF8 pinout, 70V24L25PF8 application, or 70V24L25PF8 equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), 84-pin PLCC package compatibility, low standby current (660 µA typ.), and full hardware semaphore flag management across both ports.
Technical Context
This device 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. It integrates on-chip arbitration logic including BUSY flag signaling and master/slave cascading capability via M/S pin for 32-bit+ bus expansion.
It supports LVTTL-compatible 3.3 V ±0.3 V operation, features separate upper-byte (UBR/UBL) and lower-byte (LBR/LBL) enables, and provides eight dedicated semaphore flags addressed by A0–A2 - accessed via SEM pin with dedicated timing (tSAA ≤25 ns, tSWRD =5 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 bits (64 Kbit total); supports independent 16-bit data paths per port |
| Access Time (tAA) | 25 ns max - defines minimum address-to-data valid delay for deterministic timing closure |
| Read Cycle Time (tRC) | 25 ns max - sets maximum sustained read throughput of 40 MHz per port |
| Standby Current (ISB3) | 660 µA typ. - enables ultra-low-power hold mode when both ports are disabled with CMOS-level inputs |
| Operating Voltage | 3.3 V ±0.3 V - compatible with modern low-voltage digital systems without level-shifting |
| Temperature Range | –40°C to +85°C - qualified for industrial embedded control and communications equipment |
| Package | 84-pin PLCC (PLG84) - through-hole mountable with 1.15″ × 1.15″ footprint and thermal pad compatibility |
Pinout & Package
70V24L25PF8 is housed in an 84-pin Plastic Leaded Chip Carrier (PLG84) package with 1.15 in × 1.15 in body size and 0.17 in height. Pin 1 is located at the index corner; all VDD pins require local decoupling, and all VSS pins must be connected to ground.
| 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 | Left port lower-byte data I/O | 8-bit bidirectional data path; controlled by LBL and CEL |
| I/O8L–I/O15L | Left port upper-byte data I/O | 8-bit bidirectional data path; controlled by UBL and CEL |
| I/O0R–I/O7R | Right port lower-byte data I/O | 8-bit bidirectional data path; controlled by LBR and CER |
| I/O8R–I/O15R | Right port upper-byte data I/O | 8-bit bidirectional data path; controlled by UBR and CER |
| CEL / CER | Chip enable (left/right) | Active-low enables for respective port; controls power-down entry |
| OEL / OER | Output enable (left/right) | Active-low tri-state control for output drivers on each port |
| R/WL / R/WR | Read/write control (left/right) | Active-low write enable; high = read, low = write |
| UBL / UBR | Upper-byte select (left/right) | Enables upper 8 bits (I/O8–I/O15) independently per port |
| LBL / LBR | Lower-byte select (left/right) | Enables lower 8 bits (I/O0–I/O7) independently per port |
| SEML / SEMR | Semaphore enable (left/right) | Active-low enables access to 8 semaphore flags (A0–A2 addressable) |
| BUSYL / BUSYR | Busy flag (left/right) | Push-pull output indicating port contention; BUSYL is output in MASTER, input in SLAVE |
| INTL / INTR | Interrupt flag (left/right) | Push-pull output asserting on semaphore or user-defined event |
| M/S | Master/Slave select | VIL = SLAVE (BUSY input), VIH = MASTER (BUSY output); enables daisy-chain configuration |
| VDD | Power supply | 3.3 V ±0.3 V; multiple pins require distributed decoupling |
| VSS | Ground | Signal and power ground; multiple pins require low-inductance connection |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous, independent reads/writes to identical addresses without collision or arbitration overhead |
| Hardware semaphore logic | Eight dedicated flags accessible via A0–A2 and SEM pin; supports atomic test-and-set for multi-processor synchronization |
| Master/slave cascading | Single M/S pin configures device as MASTER (drives BUSY) or SLAVE (accepts BUSY), enabling 32-bit+ bus expansion |
| Byte-selectable I/O | Separate UBL/UBL and LBL/LBR controls allow partial-word writes without read-modify-write cycles |
| Low-power standby mode | 660 µA typical ISB3 current achieved when both CE pins held high with CMOS-level inputs |
Applications
| Industrial PLC Memory Buffer | Avionics Data Exchange Module |
|---|---|
Use Scenario: Dual-CPU programmable logic controller where CPU-A handles motion control and CPU-B manages I/O scanning. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore coordination to prevent race conditions during shared register updates. Use Value: Eliminates need for external arbitration logic; 25 ns access ensures sub-40 ns deterministic response for safety-critical motion loops. | Use Scenario: ARINC 429 interface module requiring synchronized data transfer between flight management and display processors. IC Role / Device Role / Timing Role: Inter-processor communication hub with BUSY-flag handshaking and interrupt-driven status notification. Use Value: Enables lock-free data exchange at 40 MHz sustained rate while meeting DO-254 timing constraints for certified avionics. |
| Medical Imaging Frame Store | Test Equipment Pattern Generator |
Use Scenario: Real-time ultrasound beamformer storing echo samples from ADC and feeding DSP engine concurrently. IC Role / Device Role / Timing Role: Dual-port SRAM acting as ping-pong frame buffer with independent read/write ports eliminating FIFO latency. Use Value: 4K × 16 organization matches 16-bit ADC resolution; 25 ns access supports >30 fps real-time imaging without frame drop. | Use Scenario: Automated test system generating high-speed digital stimulus patterns while capturing response data simultaneously. IC Role / Device Role / Timing Role: Pattern memory with left port writing new vectors and right port streaming to output drivers at 40 MHz. Use Value: Byte-select enables partial pattern updates; low standby current extends uptime in unattended burn-in testing. |
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 - no M/S pin; uses external arbitration | Lacks integrated master/slave cascading and hardware semaphore; requires discrete logic for multi-device expansion | Select when board layout favors surface-mount TQFP and arbitration is handled externally |
| IDT70V25L25PF | 8K × 18, 25 ns, 3.3 V, 100-pin TQFP - wider data bus, higher density, different pinout | Not pin-compatible; supports 36-bit expansion natively but occupies larger PCB area | Select when memory depth or width exceeds 4K × 16 and TQFP packaging is acceptable |
Compared with CY7C024AV-25AXC and IDT70V25L25PF, the 70V24L25PF8 uniquely delivers industrial-grade 84-pin PLCC packaging with integrated M/S cascading and full semaphore logic - reducing BOM count and PCB complexity in space-constrained, multi-processor embedded systems.
Availability
70V24L25PF8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data modules, and medical imaging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 70V24L25PF8 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 interface, and RF products for communications, computing, and industrial markets.
The IDT70V24 family delivers low-latency, radiation-tolerant dual-port SRAMs optimized for real-time inter-processor communication in harsh-environment embedded systems.
FAQ
What is the maximum operating frequency supported by the 70V24L25PF8?
The 70V24L25PF8 supports a maximum read/write cycle time of 25 ns, corresponding to a 40 MHz sustained operation per port. This timing is guaranteed over the full industrial temperature range (–40°C to +85°C) and 3.3 V ±0.3 V supply, with no derating required under specified AC test conditions.
Does the 70V24L25PF8 support true simultaneous access to the same memory location from both ports?
Yes, the 70V24L25PF8 implements true dual-port SRAM cells that allow concurrent read operations to the same address from left and right ports without conflict. Write operations to the same location trigger BUSY flag assertion to prevent data corruption, ensuring deterministic arbitration.
How is semaphore functionality implemented in the 70V24L25PF8?
The 70V24L25PF8 provides eight dedicated hardware semaphore flags accessed via A0–A2 address lines and controlled by the SEML/SEMR pins. Semaphore read/write uses dedicated timing (tSAA ≤25 ns, tSWRD =5 ns) and operates independently of main memory access, enabling atomic test-and-set operations for multi-processor synchronization.
What is the role of the M/S pin on the 70V24L25PF8?
The M/S pin configures the 70V24L25PF8 as either MASTER (M/S = VIH) or SLAVE (M/S = VIL). In MASTER mode, BUSYL is an output flag indicating port contention; in SLAVE mode, BUSYL is an input accepting BUSY signals from upstream devices - enabling daisy-chained 32-bit+ memory expansion without external logic.
Can the 70V24L25PF8 operate in low-power standby mode with only one port enabled?
Yes, the 70V24L25PF8 supports multiple standby modes. With one port active (CE = VIL) and the other disabled (CE = VIH), ISB2 is 75 mA max (typ. 65 mA) under TTL-level inputs. Full standby (both CE = VIH, CMOS-level inputs) achieves 660 µA typical current, making it suitable for battery-backed or energy-sensitive applications.
70V24L25PF8 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
70V24L25PF8 FAQ
1.How can I place an order for 70V24L25PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24L25PF8 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 70V24L25PF8 reliable?
The price and inventory of 70V24L25PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24L25PF8 is usually 5 days.
3.What payment methods are accepted for 70V24L25PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24L25PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24L25PF8?
70V24L25PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24L25PF8 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 70V24L25PF8?
For technical support, including 70V24L25PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24L25PF8 requirements.
6.How does Aetrix verify that 70V24L25PF8 is sourced from the original manufacturer or authorized distributors?
All 70V24L25PF8 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 70V24L25PF8 meets industry standards.
7.What is the process for return or replacement of 70V24L25PF8?
All 70V24L25PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V24L25PF8, 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 70V24L25PF8 part is unused and in its original packaging.
Return procedure for 70V24L25PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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