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Renesas 70V08S20PF
- Part No.:
- 70V08S20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V08S20PF.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,386
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Product details
Overview
70V08S20PF from IDT (Integrated Device Technology) is a high-speed, 3.3V, 64K × 8 true dual-ported static RAM with independent left/right ports, 20 ns max access time (industrial grade), LVTTL-compatible I/O, and on-chip semaphore/arbitration logic for inter-processor communication in real-time embedded systems.
For engineers reviewing the 70V08S20PF datasheet, 70V08S20PF pinout, 70V08S20PF application, or 70V08S20PF equivalent, this device supports simultaneous asynchronous read/write to shared memory locations, hardware BUSY/INT flag signaling, and Master/Slave cascading for 16-bit+ data bus expansion - critical for multi-CPU control, digital signal processing, and telecom packet buffering.
Technical Context
The 70V08S20PF implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port. It integrates dedicated arbitration logic that resolves contention via BUSY flag assertion (M/S = VIH) or BUSY input (M/S = VIL), plus eight hardware semaphores accessible via A0–A2 and SEM pin.
It supports three operational modes: standard RAM access (CE = VIL, SEM = VIH), semaphore access (CE = VIH, SEM = VIL), and interrupt mailbox handling (FFFE/FFFF addresses). All timing parameters-including tAA (20 ns), tRC (20 ns), and tBDD (35 ns)-are specified over –40°C to +85°C at VDD = 3.3 V ± 0.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 8 bits (512 Kbit total); enables direct byte-wide interfacing without data-width conversion logic |
| Access Time (tAA) | 20 ns max (industrial temperature range); guarantees deterministic latency for hard real-time CPU coherency |
| Supply Voltage | 3.3 V ± 0.3 V; compatible with modern low-voltage LVTTL logic families and eliminates level-shifting requirements |
| Operating Temperature | –40°C to +85°C; qualified for industrial-grade deployment in motor drives, base stations, and avionics subsystems |
| Standby Current (ISB3) | 0.2 mA typ. (full CMOS standby); reduces system power by >99% vs active mode during idle processor cycles |
| Package | 100-pin TQFP (14 mm × 14 mm × 1.4 mm); surface-mount compatible with automated assembly and thermal management |
| Bus Arbitration | Hardware-supported via BUSY/INT flags and M/S pin; eliminates need for external glue logic in master/slave configurations |
Pinout & Package
70V08S20PF is housed in a 100-pin Thin Quad Flatpack (TQFP) with exposed pad, body size 14 mm × 14 mm × 1.4 mm. All VDD pins require local decoupling; all GND pins must be connected to ground plane for signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE0L / CE1L CE0R / CE1R | Chip Enable (Left/Right) | Dual enables per port allow independent power-down of each interface; enables depth expansion without external gating logic |
| R/WL / R/WR | Read/Write Control | Active-low bidirectional direction control; determines I/O driver state during memory access cycles |
| OEL / OER | Output Enable | Tri-states I/O lines independently per port; essential for bus sharing and hot-swap isolation |
| A0L–A15L / A0R–A15R | Address Inputs | Fully independent 16-bit address buses support concurrent access to any memory location from either port |
| I/O0L–I/O7L / I/O0R–I/O7R | Bidirectional Data | True dual-port data paths enable simultaneous read/write to same address with automatic BUSY arbitration |
| SEML / SEMR | Semaphore Enable | Activates 8-bit semaphore register bank (A0–A2 addressed); enables lock-step resource coordination between processors |
| INTL / INTR | Interrupt Flag Output | Push-pull outputs signal inter-processor events (e.g., write to FFFE/FFFF); no external pull-ups required |
| BUSYL / BUSYR | Arbitration Flag | Push-pull BUSY signals indicate port contention; M/S pin configures as output (master) or input (slave) |
| M/S | Master/Slave Select | Configures device role: VIH = BUSY output (master), VIL = BUSY input (slave); enables hierarchical multi-device topologies |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous, independent read/write access to identical memory locations - eliminates software locks and improves throughput in SMP systems |
| Hardware Semaphore Logic | Eight dedicated flags accessed via A0–A2 and SEM pin; provides atomic resource locking without CPU intervention or polling overhead |
| Automatic Power-Down | CE-controlled standby draws only 0.2 mA (ISB3); reduces idle power by 99.9% vs active mode while preserving data retention |
| Master/Slave Cascading | Supports 16-bit+ word expansion using M/S pin and BUSY chaining; avoids external multiplexers or address decoding logic |
| Industrial Temperature Range | Rated for –40°C to +85°C operation with full AC/DC specifications; suitable for under-hood automotive, factory automation, and outdoor infrastructure |
Applications
| Multi-Processor Communication | Digital Signal Processing Buffer |
|---|---|
Use Scenario: Two ARM Cortex-M7 cores share sensor fusion data in an autonomous vehicle ECU, requiring lock-free memory exchange. IC Role / Device Role / Timing Role: 70V08S20PF acts as coherent shared memory with hardware semaphore arbitration and BUSY-driven write inhibition. Use Value: Eliminates software mutex overhead and guarantees sub-20 ns memory access consistency across CPUs without clock domain crossing logic. |
Use Scenario: An FPGA-based radar signal processor buffers incoming ADC samples and feeds them to multiple DSP engines operating at different rates. IC Role / Device Role / Timing Role: 70V08S20PF serves as dual-clock domain FIFO buffer, with left port capturing samples and right port streaming to FFT units. Use Value: Enables zero-wait-state data handoff between asynchronous clock domains using native BUSY/INT handshake instead of complex synchronizer circuits. |
| Telecom Packet Switching | Industrial PLC Memory Coherency |
Use Scenario: A carrier-grade Ethernet switch ASIC uses two CPUs to manage ingress/egress packet queues and forwarding tables. IC Role / Device Role / Timing Role: 70V08S20PF functions as shared descriptor table memory with interrupt-driven mailbox signaling (FFFE/FFFF). Use Value: Reduces packet latency variance by 3.2 µs avg. vs software-managed queues, meeting ITU-T G.8261 jitter compliance. |
Use Scenario: A modular PLC backplane connects motion controller and I/O manager CPUs that coordinate servo updates and safety monitoring. IC Role / Device Role / Timing Role: 70V08S20PF provides deterministic shared memory with hardware semaphore protection for real-time task synchronization. Use Value: Ensures <100 ns worst-case semaphore acquisition time, satisfying IEC 61508 SIL3 determinism requirements for safety-critical loops. |
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-20AXC | 512K × 16 organization, 20 ns access, 3.3 V supply; no integrated semaphore logic; requires external arbitration circuitry | Lacks hardware semaphore/BUSY arbitration; suitable only where software coordination suffices or external logic is acceptable | Select when wider data bus (16-bit) is mandatory and arbitration can be handled externally or in firmware |
| AS7C362000B-20TIN | 256K × 16 organization, 20 ns access, 3.3 V supply; single-port architecture with burst mode; no dual-port or arbitration features | No true dual-port capability; cannot support simultaneous access or hardware inter-processor signaling | Choose only for cost-sensitive, non-concurrent memory applications where dual-port functionality is unnecessary |
Compared with CY7C028V-20AXC and AS7C362000B-20TIN, the 70V08S20PF uniquely delivers integrated hardware arbitration, semaphore registers, and true dual-port operation in a compact 100-pin TQFP - reducing BOM count, PCB area, and firmware complexity in tightly coupled multi-CPU designs.
Availability
70V08S20PF is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and automotive ADAS applications requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.
Supply support for 70V08S20PF 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), now part of Renesas Electronics, is a leader in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The 70V08S20PF belongs to IDT's legacy high-speed dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems requiring sub-20 ns latency and hardware-coordinated resource sharing.
FAQ
What is the maximum operating temperature range for the 70V08S20PF?
The 70V08S20PF is rated for industrial temperature operation from –40°C to +85°C, with all AC and DC electrical specifications guaranteed across this range at VDD = 3.3 V ± 0.3 V. This makes it suitable for deployment in harsh environments such as factory floors, automotive engine compartments, and outdoor telecom cabinets where thermal stability is critical.
How does the 70V08S20PF handle memory contention between its two ports?
The 70V08S20PF resolves contention using hardware arbitration logic that asserts BUSY flags based on address match and M/S configuration. When both ports attempt simultaneous access to the same location, the BUSY signal blocks the later-arriving write cycle, ensuring deterministic behavior. The tAPS (5 ns) priority setup time guarantees consistent arbitration outcomes without software intervention.
Can the 70V08S20PF be used in a 16-bit data bus configuration?
Yes - the 70V08S20PF supports 16-bit expansion via Master/Slave cascading. By connecting two devices with M/S pins configured appropriately and chaining BUSY/INT signals, designers achieve full-speed 16-bit word access without external logic. The dual chip-enable structure (CE0/CE1 per port) simplifies depth expansion for larger memory maps.
What is the purpose of the SEM pin on the 70V08S20PF?
The SEM (Semaphore Enable) pin selects between RAM array access (SEM = VIH) and 8-bit semaphore register access (SEM = VIL). When enabled, the semaphore bank is addressed via A0–A2 and controlled through I/O0 (write) and I/O0–I/O7 (read), providing hardware-accelerated resource locking for multi-processor synchronization without CPU polling or software overhead.
Does the 70V08S20PF support power-down modes, and how is it controlled?
Yes - the 70V08S20PF features automatic power-down controlled by CE0 and CE1 inputs per port. When both CE inputs are high (VIH), the port enters full standby mode drawing only 0.2 mA (ISB3). Partial standby (one port active) draws 105 mA typ. This dynamic power management reduces system-level energy consumption during idle periods while retaining data integrity.
70V08S20PF 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:
- 20ns
- Access Time:
- 20 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)
70V08S20PF FAQ
1.How can I place an order for 70V08S20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V08S20PF 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 70V08S20PF reliable?
The price and inventory of 70V08S20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V08S20PF is usually 5 days.
3.What payment methods are accepted for 70V08S20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V08S20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V08S20PF?
70V08S20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V08S20PF 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 70V08S20PF?
For technical support, including 70V08S20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V08S20PF requirements.
6.How does Aetrix verify that 70V08S20PF is sourced from the original manufacturer or authorized distributors?
All 70V08S20PF 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 70V08S20PF meets industry standards.
7.What is the process for return or replacement of 70V08S20PF?
All 70V08S20PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V08S20PF, 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 70V08S20PF part is unused and in its original packaging.
Return procedure for 70V08S20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V08S20PF Tags
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