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Renesas 70V05S35PF
- Part No.:
- 70V05S35PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
70V05S35PF.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,430
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Product details
Overview
70V05S35PF from IDT is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 35 ns maximum access time (commercial grade), TTL-compatible I/O, and full on-chip semaphore and interrupt support for real-time inter-processor communication in embedded control systems.
For engineers reviewing the 70V05S35PF datasheet, 70V05S35PF pinout, 70V05S35PF application, or 70V05S35PF equivalent, key selection considerations include bus arbitration latency, BUSY flag timing under address contention, dual-port power-down current (≤660 μW standby), and master/slave cascading capability for 16-bit+ data width expansion.
Technical Context
The 70V05S35PF implements fully asynchronous dual-port operation with separate address, control, and bidirectional I/O buses per port. Its on-chip arbitration logic resolves simultaneous access via BUSY flag assertion (push-pull output) or input, depending on M/S pin state - master asserts BUSY to block slave writes during contention.
It integrates dedicated semaphore registers (8 flags, addressed by A0–A2) and interrupt signaling (INTL/INTR) with set/clear timing controlled by CE and R/W transitions. All timing parameters - including tBDD (bus delay detection), tSPS (semaphore priority setup), and tAPS (address match arbitration setup) - are specified for 3.3 V ±0.3 V supply across commercial temperature range (0°C to +70°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit total), two independent 8-bit ports |
| Access Time (tAA) | 35 ns max - defines minimum cycle time for consecutive reads/writes without wait states |
| Supply Voltage | 3.3 V ±0.3 V - single rail, eliminates level-shifting requirements in 3.3 V systems |
| Standby Current | 660 μW typ. - enables ultra-low-power hold mode when CE = VIH on both ports |
| Operating Temperature | 0°C to +70°C - commercial grade, validated for industrial control panels and telecom line cards |
| Package | 64-pin TQFP (PNG64), 14 mm × 14 mm footprint - surface-mount compatible with automated assembly |
| Arbitration Logic | Hardware-based port-to-port conflict resolution using BUSY flag and M/S pin configuration |
Pinout & Package
70V05S35PF is housed in a 64-pin thin quad flatpack (TQFP, package code PNG64), with 0.5 mm pitch, 14 mm × 14 mm body, and 1.4 mm height. Power (VDD) and ground (VSS) pins are distributed across all four sides for low-noise decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L | Left port address inputs | 13-bit address bus for left-side memory access (8K = 2¹³) |
| A0R–A12R | Right port address inputs | Independent 13-bit address bus for right-side access; no shared address lines |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit parallel data path; tri-stated when OEL = VIH or CEL = VIH |
| I/O0R–I/O7R | Right port bidirectional data | Electrically isolated 8-bit path; supports simultaneous read/write to same location |
| CEL / CER | Chip enable (left/right) | Active-low enables port access; controls active/standby power state per port |
| OEL / OER | Output enable (left/right) | Active-low enables I/O drivers; allows read-only access while keeping write path inactive |
| R/WL / R/WR | Read/write control (left/right) | Active-low write; HIGH = read, LOW = write - defines direction of data flow on I/O bus |
| SEML / SEMR | Semaphore enable (left/right) | Active-low selects semaphore register access instead of memory array (CE = VIH required) |
| INTL / INTR | Interrupt flag (input/output) | Open-drain capable; driven LOW by opposite port to signal event (e.g., semaphore acquisition) |
| BUSYL / BUSYR | Bus busy flag (configurable) | M/S = VIH → output (master); M/S = VIL → input (slave); used for hardware arbitration |
| M/S | Master/slave select | VIH configures device as master (BUSY outputs); VIL configures as slave (BUSY inputs) |
| VDD / VSS | Power / ground | Four VDD and six VSS pins ensure stable 3.3 V delivery and low-impedance return paths |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables concurrent read/write operations from independent processors or DMA engines without external logic |
| Hardware semaphore support | Eight dedicated flags (A0–A2 addressable) eliminate software spinlocks and reduce inter-core latency |
| Configurable BUSY arbitration | Master/slave pin (M/S) enables flexible system topology - single-device master or multi-device cascaded arrays |
| Asynchronous port operation | No clock required; timing governed solely by CE, OE, R/W setup/hold - simplifies timing closure in mixed-speed systems |
| Low-voltage 3.3 V interface | TTL-compatible thresholds (VIH = 2.0 V min, VIL = 0.8 V max) ensure interoperability with FPGA I/O banks and microcontroller GPIOs |
| Green packaging option | Lead-free, RoHS-compliant TQFP meets environmental compliance requirements for industrial and telecom deployments |
Applications
| Industrial PLC Backplane | Telecom Line Card Buffer |
|---|---|
Use Scenario: Two independent CPU modules (e.g., ARM host + DSP co-processor) share status, command, and telemetry data via shared memory. IC Role / Device Role / Timing Role: Dual-port SRAM acts as non-blocking inter-processor communication buffer with hardware-enforced mutual exclusion via semaphores and BUSY signals. Use Value: Eliminates need for external arbitration logic; 35 ns access enables sub-30 MHz real-time control loop updates between cores. |
Use Scenario: High-density line card with multiple ASICs (e.g., framer, mapper, PHY) requires low-latency, deterministic data exchange for packet header manipulation. IC Role / Device Role / Timing Role: Serves as shared descriptor table and statistics buffer; left port connects to framer, right port to mapper, with INT-driven notification on completion. Use Value: Hardware interrupt and semaphore coordination reduces software overhead by >40% versus polling-based schemes. |
| Avionics Data Concentrator | Medical Imaging Subsystem |
Use Scenario: ARINC 429 or MIL-STD-1553 bus controller interfaces with flight management unit (FMU) and sensor fusion processor via shared memory. IC Role / Device Role / Timing Role: Provides deterministic, lock-free data exchange with guaranteed atomicity for critical avionics messages using semaphore-controlled access windows. Use Value: Meets DO-254 Level A timing predictability requirements; BUSY arbitration ensures worst-case contention resolution ≤35 ns. |
Use Scenario: MRI subsystem where FPGA-accelerated image reconstruction engine shares raw k-space data with ARM-based UI controller for preview rendering. IC Role / Device Role / Timing Role: Acts as zero-copy frame buffer; left port accepts burst writes from ADC/FPGA, right port supplies sequential reads to display controller. Use Value: 64 Kbit capacity supports 128×128 pixel previews at 8 bpp; 660 μW standby enables power-gating during idle intervals. |
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 | 25 ns access, 5 V tolerant I/O, 68-pin PLCC only - no TQFP option; higher active power (500 mW typ) | Requires level translation in 3.3 V systems; larger footprint limits board density | Select only if legacy 5 V design compatibility or PLCC socket reuse is mandatory |
| AS7C38099B-25JCIN | 25 ns access, 3.3 V only, 100-pin TQFP - larger package, no integrated semaphore logic | Lacks hardware semaphore and BUSY arbitration; requires external logic or firmware coordination | Prefer when raw speed is primary and software-managed synchronization is acceptable |
Compared with CY7C024AV-25AXC and AS7C38099B-25JCIN, the 70V05S35PF delivers optimal balance of 3.3 V compatibility, compact 64-pin TQFP packaging, and integrated hardware arbitration - reducing BOM count and improving determinism in real-time embedded systems.
Availability
70V05S35PF is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line cards, avionics data concentrators, and medical imaging subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 70V05S35PF 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) was a fabless semiconductor company specializing in timing, memory interface, and RF solutions before its acquisition by Renesas in 2019. It pioneered high-performance dual-port SRAM architectures for real-time embedded systems.
The 70V05S35PF belongs to IDT's 70V05 family of high-speed 3.3 V dual-port SRAMs, designed specifically for deterministic inter-processor communication in industrial control, telecommunications infrastructure, and safety-critical embedded applications.
FAQ
What is the maximum operating frequency supported by the 70V05S35PF?
The 70V05S35PF does not operate on a clock; it is fully asynchronous. Its maximum effective throughput is determined by access time (35 ns max) and cycle time (tRC = 35 ns). This enables up to ~28.6 MHz sustained random access rate per port, assuming no wait states and optimal control signal timing.
Does the 70V05S35PF support true simultaneous read operations from both ports to the same memory location?
Yes, the 70V05S35PF features true dual-ported memory cells that allow concurrent reads from both left and right ports to identical addresses without contention, corruption, or additional latency - a core architectural feature confirmed in the functional description and truth tables.
How is semaphore functionality implemented in the 70V05S35PF, and what address range controls it?
The 70V05S35PF implements eight hardware semaphore flags accessible via I/O0–I/O7. They are selected using address bits A0–A2 while CE = VIH and SEM = VIL. Each flag operates as a binary resource lock, supporting atomic test-and-set operations essential for multi-processor synchronization.
What is the role of the M/S pin on the 70V05S35PF, and how does it affect BUSY signal behavior?
The M/S pin configures the 70V05S35PF as either master (M/S = VIH) or slave (M/S = VIL). In master mode, BUSYL and BUSYR are push-pull outputs asserting during address contention; in slave mode, they become inputs that inhibit writes when driven LOW by a master device - enabling hierarchical arbitration.
Can the 70V05S35PF be used in a 16-bit data bus configuration, and if so, how is it achieved?
Yes, the 70V05S35PF supports 16-bit expansion via master/slave cascading. Two devices are connected in parallel with identical address and control lines; the master's BUSY output drives the slave's BUSY input, and M/S pins configure roles. This eliminates external glue logic while maintaining full-speed operation.
70V05S35PF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-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:
- 8K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (14x14)
70V05S35PF FAQ
1.How can I place an order for 70V05S35PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V05S35PF 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 70V05S35PF reliable?
The price and inventory of 70V05S35PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V05S35PF is usually 5 days.
3.What payment methods are accepted for 70V05S35PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V05S35PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V05S35PF?
70V05S35PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V05S35PF 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 70V05S35PF?
For technical support, including 70V05S35PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V05S35PF requirements.
6.How does Aetrix verify that 70V05S35PF is sourced from the original manufacturer or authorized distributors?
All 70V05S35PF 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 70V05S35PF meets industry standards.
7.What is the process for return or replacement of 70V05S35PF?
All 70V05S35PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V05S35PF, 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 70V05S35PF part is unused and in its original packaging.
Return procedure for 70V05S35PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V05S35PF Tags
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