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Renesas 70V08L25PF
- Part No.:
- 70V08L25PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V08L25PF.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,516
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Product details
Overview
70V08L25PF from IDT (now Renesas) is a high-speed, 3.3V, 64K × 8 true dual-ported static RAM with independent left/right ports, 25 ns maximum access time (commercial grade), LVTTL-compatible I/O, and on-chip semaphore/interrupt/arbitration logic for real-time interprocessor communication. It enables simultaneous read/write to the same memory location in embedded multiprocessing systems.
For engineers reviewing the 70V08L25PF datasheet, 70V08L25PF pinout, 70V08L25PF application, or 70V08L25PF equivalent, key selection considerations include port arbitration timing (tAPS = 5 ns), BUSY flag behavior (push-pull, M/S-configurable), dual CE support for depth expansion, and industrial-grade availability of compatible speed grades.
Technical Context
The 70V08L25PF implements fully asynchronous dual-port operation with separate address, control, and data buses per port - no shared clock required. Its on-chip arbitration logic resolves contention via hardware BUSY flag assertion (tBAA ≤ 25 ns) and priority setup (tAPS = 5 ns), eliminating external glue logic in master/slave configurations.
It supports three concurrent memory access modes: standard RAM access (CE = VIL, SEM = VIH), semaphore register access (CE = VIH, SEM = VIL), and interrupt mailbox handling (FFFE/FFFF addresses). All I/Os are LVTTL-compatible with VDD = 3.3 V ± 0.3 V, and power-down is controlled independently per port via CE0/CE1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 8 bits (512 Kbit), true dual-port SRAM with independent left/right address/data/control paths |
| Access Time (tAA) | 25 ns max - guarantees full-speed interface with 40 MHz bus systems without wait states |
| Supply Voltage | 3.3 V ± 0.3 V - LVTTL-compatible operation; all VDD pins require decoupling per datasheet layout rules |
| Operating Temperature | 0°C to +70°C (Commercial) - validated for stable performance across full range without derating |
| Standby Current (ISB3) | 0.2 mA typ. - ultra-low power shutdown mode when both ports disabled with CMOS-level inputs |
| Bus Interface | Non-multiplexed, bidirectional I/O0–I/O7 per port - eliminates address/data bus contention in parallel processor designs |
| Arbitration Latency | tAPS = 5 ns - minimum setup time for deterministic BUSY flag arbitration between ports |
Pinout & Package
70V08L25PF is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VDD and VSS pins must be individually decoupled; NC pins are not internally connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A15L / A0R–A15R | Address Inputs (Left/Right) | 16-bit independent address buses - enable concurrent access to any memory location from either port |
| I/O0L–I/O7L / I/O0R–I/O7R | Bidirectional Data I/O (Left/Right) | 8-bit parallel data path per port - supports simultaneous read/write without bus turnaround delay |
| CE0L/CE1L / CE0R/CE1R | Chip Enable Inputs (TTL/CMOS) | Dual CE per port allows independent power-down and depth expansion without external logic |
| R/WL/R/WR | Read/Write Control | Active-low write enable - defines direction of data flow on I/O bus for each port independently |
| OEL/OER | Output Enable | Tri-states I/O drivers when deasserted - prevents bus contention during multi-port sharing |
| SEML/SEMR | Semaphore Enable | Selects semaphore register mode (CE = VIH, SEM = VIL) - accesses eight 1-bit flags via A0–A2 |
| INTL/INTR | Interrupt Flag Outputs | Push-pull outputs - signal interprocessor events (e.g., right port writes to FFFE triggers INTL) |
| BUSYL/BUSYR | Arbitration Status | Push-pull BUSY flags - asserted when port access conflicts with ongoing write to same address |
| M/S | Master/Slave Select | Configures BUSY as output (VIH) or input (VIL) - enables hierarchical multi-device arbitration |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous, independent read/write to identical memory locations - critical for lock-free IPC in real-time OS environments |
| Hardware Semaphore Logic | Eight dedicated 1-bit flags accessible via A0–A2 - eliminates software polling and reduces inter-core synchronization latency |
| On-Chip Arbitration | Automatic BUSY flag generation with tBAA ≤ 25 ns - ensures deterministic resolution of port contention without external logic |
| Configurable Master/Slave Mode | M/S pin selects push-pull BUSY output (master) or BUSY input (slave) - supports cascaded multi-RAM arbitration trees |
| Low-Power Standby | ISB3 = 0.2 mA typ. - enables energy-efficient operation in battery-backed or always-on embedded controllers |
Applications
| Real-Time Multiprocessor Systems | Digital Signal Processing (DSP) Co-Processing |
|---|---|
Use Scenario: Two ARM Cortex-A cores share sensor fusion data in an automotive ADAS ECU with strict <10 µs inter-core latency requirements. IC Role / Device Role / Timing Role: 70V08L25PF serves as shared mailbox and semaphore hub - enabling zero-wait-state data exchange and atomic flag updates. Use Value: Eliminates software mutex overhead and guarantees sub-25 ns arbitration response, meeting ASIL-B timing constraints. | Use Scenario: A TI C6000 DSP offloads FFT computation while an FPGA handles real-time I/O buffering in a radar front-end. IC Role / Device Role / Timing Role: 70V08L25PF acts as dual-access buffer - allowing concurrent DMA reads by DSP and writes by FPGA to overlapping memory regions. Use Value: Sustains 40 MB/s sustained throughput with no bus turnaround cycles, increasing effective processing bandwidth by 35%. |
| Industrial PLC Communication Gateways | Avionics Data Concentrators |
Use Scenario: Modbus TCP master and fieldbus slave processors coordinate I/O mapping in a redundant programmable logic controller. IC Role / Device Role / Timing Role: 70V08L25PF provides synchronized status registers and command queues - with interrupt-driven event signaling via FFFE/FFFF mailboxes. Use Value: Reduces inter-processor message latency to ≤25 ns, enabling deterministic 1 ms cycle times under worst-case load. | Use Scenario: ARINC 429 receiver and MIL-STD-1553B bus controller exchange health telemetry in a flight control computer. IC Role / Device Role / Timing Role: 70V08L25PF functions as fault-tolerant shared memory - with BUSY arbitration preventing simultaneous writes to critical configuration registers. Use Value: Ensures atomic register updates across dissimilar protocols, satisfying DO-254 Level A design assurance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-ported SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C028V-25AXC | 25 ns access, 64K × 16 organization, 3.3 V supply, but lacks integrated semaphore logic and uses different arbitration scheme (BUSY only) | Requires external logic for semaphore emulation; suited for wider data paths but adds PCB area and timing complexity | Choose when 16-bit data width is mandatory and software-managed semaphores are acceptable |
| AS7C364B-25JCIN | 25 ns access, 64K × 8, 3.3 V, no built-in arbitration or semaphore - pure dual-port SRAM with basic CE/OE/RW | No hardware arbitration - forces external BUSY management and increases firmware development effort | Choose for cost-sensitive designs where inter-processor coordination is handled entirely in software |
Compared with CY7C028V-25AXC and AS7C364B-25JCIN, the 70V08L25PF delivers integrated arbitration and semaphore functionality in a pin-compatible 100-pin TQFP, reducing BOM count and guaranteeing sub-25 ns contention resolution - critical for hard real-time deterministic systems.
Availability
70V08L25PF is available at Aetrix Electronics and suitable for real-time multiprocessor systems, industrial PLC gateways, avionics data concentrators, and digital signal processing co-processing requiring stable component supply and long-term lifecycle support.
Supply support for 70V08L25PF 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
Renesas Electronics (formerly Integrated Device Technology) is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and communications markets.
The 70V08L25PF belongs to IDT's legacy high-speed dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in safety-critical embedded systems requiring hardware-enforced synchronization.
FAQ
What is the maximum operating frequency supported by the 70V08L25PF?
The 70V08L25PF does not operate on a clock; it is fully asynchronous. Its 25 ns access time supports reliable interfacing with 40 MHz bus systems (tRC = 25 ns), provided setup/hold timing (e.g., tAS = 0 ns, tDH = 0 ns) is met. No external clock signal is required - timing is governed solely by CE, R/W, and OE transitions.
How does the BUSY arbitration mechanism work on the 70V08L25PF?
The 70V08L25PF asserts BUSYL or BUSYR when address and control signals on one port conflict with an active write to the same memory location on the opposite port. With M/S = VIH (master), BUSY is an output that blocks the contending port; with M/S = VIL (slave), BUSY is an input that inhibits local writes. tBAA ≤ 25 ns ensures rapid detection.
Can the 70V08L25PF be used in industrial temperature applications?
The 70V08L25PF is specified for commercial temperature range (0°C to +70°C). For industrial operation (–40°C to +85°C), Renesas offers the functionally identical 70V08L20PF (20 ns) and 70V08L35PF (35 ns) variants - all share the same pinout, features, and 100-pin TQFP package.
What is the purpose of the SEM pins on the 70V08L25PF?
The SEML and SEMR pins enable access to the on-chip 8-bit semaphore register file. When CE = VIH and SEM = VIL, the device enters semaphore mode - allowing A0–A2 to select one of eight 1-bit flags, written via I/O0 and read across I/O0–I/O7. This provides hardware-accelerated mutual exclusion without CPU intervention.
Does the 70V08L25PF support depth expansion for larger memory capacity?
Yes - the dual chip-enable inputs (CE0L/CE1L and CE0R/CE1R) allow seamless depth expansion without external logic. Cascading multiple 70V08L25PF devices enables memory arrays beyond 64K × 8 while preserving full dual-port functionality and arbitration integrity across the expanded bank.
70V08L25PF 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:
- 512Kbit
- Memory Organization:
- 64K x 8
- 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)
70V08L25PF FAQ
1.How can I place an order for 70V08L25PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V08L25PF 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 70V08L25PF reliable?
The price and inventory of 70V08L25PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V08L25PF is usually 5 days.
3.What payment methods are accepted for 70V08L25PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V08L25PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V08L25PF?
70V08L25PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V08L25PF 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 70V08L25PF?
For technical support, including 70V08L25PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V08L25PF requirements.
6.How does Aetrix verify that 70V08L25PF is sourced from the original manufacturer or authorized distributors?
All 70V08L25PF 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 70V08L25PF meets industry standards.
7.What is the process for return or replacement of 70V08L25PF?
All 70V08L25PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V08L25PF, 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 70V08L25PF part is unused and in its original packaging.
Return procedure for 70V08L25PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V08L25PF Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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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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AT24C08C-STUM-T
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