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Renesas 70V05L35J8
- Part No.:
- 70V05L35J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
70V05L35J8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,646
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Product details
Overview
70V05L35J8 from IDT (now Renesas) is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 35 ns maximum access time, industrial temperature range (–40°C to +85°C), and integrated semaphore/arbiter logic - used in real-time inter-processor communication, video frame buffers, and FPGA co-processor memory interfaces.
For engineers reviewing the 70V05L35J8 datasheet, 70V05L35J8 pinout, 70V05L35J8 application, or 70V05L35J8 equivalent, key selection criteria include simultaneous read capability, BUSY/INT flag timing, master/slave arbitration support, low standby power (660 µW typ.), and compatibility with 3.3V TTL-level control signals.
Technical Context
The 70V05L35J8 implements fully asynchronous dual-port operation with separate address, data, and control buses per port, enabling concurrent read/write access to any memory location without external logic. Its on-chip arbitration logic resolves contention via BUSY flag assertion and supports both address-match and CE-controlled arbitration modes.
It integrates full hardware semaphore signaling across eight flags (addressed by A0–A2), interrupt generation on write-to-specific addresses, and MASTER/SLAVE configuration via the M/S pin - allowing seamless expansion to 16-bit+ data widths using cascaded devices with automatic port synchronization.
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 - guarantees valid data within 35 ns after stable address and CE/OE assertion |
| Supply Voltage | 3.3 V ± 0.3 V - single-supply TTL-compatible interface, no level-shifting required |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Active Power (IDD) | 380 mW typ. at 3.3 V - enables low-heat-generation embedded systems |
| Standby Current | 660 µW typ. - achieved via CE-controlled automatic power-down per port |
| Package | 68-pin PLCC (J8 suffix) - leaded, socket-compatible, rework-friendly for prototyping |
Pinout & Package
70V05L35J8 is housed in a 68-pin Plastic Leaded Chip Carrier (PLCC) package with 0.05-inch lead pitch, body size ≈ 0.95″ × 0.95″ × 0.17″, and standard JEDEC MO-047B footprint. Pin 1 marked by corner notch; pin numbering follows counterclockwise sequence from top-left.
| 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 |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; direction controlled by R/WL and OEL |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; direction controlled by R/WR and OER |
| CEL, CER | Chip enable (active low) | Per-port enable - disables I/O drivers and enters standby when high |
| OEL, OER | Output enable (active low) | Per-port tri-state control - allows shared bus usage without contention |
| R/WL, R/WR | Read/write control | Active-low write; high = read, low = write - defines data flow direction |
| BUSYL, BUSYR | Port arbitration status | Push-pull output (master) or input (slave); indicates port busy during contention |
| INTL, INTR | Interrupt flag outputs | Open-drain compatible; asserted on write to dedicated interrupt-set address |
| SEML, SEMR | Semaphore enable | Low enables semaphore register access (A0–A2 select one of eight flags) |
| M/S | Master/Slave select | VIH = master (BUSY outputs), VIL = slave (BUSY inputs); enables cascading |
| VDD, VSS | Power and ground | Multiple VDD (pins 12, 13, 23, 24, 35, 40, 41, 59, 60, 67) and VSS (pins 9, 22, 33, 34, 43, 44, 52, 53, 63, 64) pins ensure low-noise supply distribution |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous reads from same location - eliminates need for shadow RAM or software synchronization in lock-free buffer designs |
| Hardware semaphore logic | Eight dedicated flags accessible via A0–A2; enables atomic resource locking between processors without CPU intervention |
| Configurable master/slave mode | M/S pin selects BUSY directionality - allows stacking multiple 70V05L35J8 devices for 16-bit+ word width with zero external glue logic |
| Asynchronous port operation | No clock required - simplifies timing closure in mixed-signal or FPGA-based systems with heterogeneous clock domains |
| Integrated interrupt generation | INTL/INTR assert on write to user-defined address - provides hardware event notification without polling overhead |
Applications
| Video Frame Buffer | FPGA Co-Processor Interface |
|---|---|
Use Scenario: Storing and synchronizing progressive-scan video frames between camera capture (left port) and display engine (right port). IC Role / Device Role / Timing Role: Dual-port SRAM acts as ping-pong frame buffer; left port writes incoming pixel data while right port reads out to DAC, with BUSY preventing overwrites during active read. Use Value: Eliminates frame tearing and reduces latency to one line period - enabled by 35 ns access and simultaneous read capability. | Use Scenario: Shared memory between FPGA fabric and external microcontroller for command/status exchange and DMA payload buffering. IC Role / Device Role / Timing Role: 70V05L35J8 serves as non-blocking interconnect; FPGA controls left port, MCU controls right port, semaphores coordinate buffer ownership. Use Value: Reduces firmware complexity by offloading synchronization to hardware - avoids race conditions during burst transfers. |
| Real-Time Inter-Processor Communication | Digital Signal Processing Pipeline |
Use Scenario: Bidirectional messaging between two DSPs performing parallel audio processing tasks with strict deterministic latency. IC Role / Device Role / Timing Role: Memory-mapped mailbox; each DSP uses one port to post messages and poll INT flags for arrival notifications. Use Value: Guarantees sub-35 ns message visibility - meets hard real-time deadlines without software mutex overhead. | Use Scenario: Staging intermediate results between pipeline stages (e.g., FFT → filtering → encoding) where stage timing is asynchronous. IC Role / Device Role / Timing Role: 70V05L35J8 provides decoupled stage buffers; upstream stage writes via left port, downstream reads via right port with BUSY handshake. Use Value: Enables pipelining across clocks with different frequencies - removes FIFO depth constraints imposed by single-clock memories. |
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-35AXC | 3.3V 8K × 16 organization; 64-pin TQFP; no built-in semaphore logic | Requires external logic for semaphore emulation; better suited for wider data paths than 8-bit | Select when 16-bit bus width is mandatory and arbitration can be handled externally |
| AS7C38097A-35PCN | 3.3V 8K × 8; 64-pin TQFP; lacks BUSY/INT pins and master/slave mode | Supports only basic dual-port operation - no hardware arbitration or interrupt features | Choose for cost-sensitive designs where software-managed synchronization is acceptable |
Compared with CY7C024AV-35AXC and AS7C38097A-35PCN, the 70V05L35J8 uniquely delivers integrated semaphore, BUSY arbitration, and master/slave expansion in a 68-pin PLCC - making it optimal for compact, low-latency inter-processor systems requiring minimal external components.
Availability
70V05L35J8 is available at Aetrix Electronics and suitable for industrial automation controllers, broadcast video equipment, and aerospace data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 70V05L35J8 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 fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications and computing infrastructure.
The 70V05L35J8 belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where hardware arbitration and interrupt signaling are critical.
FAQ
What is the maximum operating frequency supported by the 70V05L35J8?
The 70V05L35J8 does not operate on a clock; it is fully asynchronous. Its performance is defined by access time: 35 ns maximum tAA ensures valid data within 35 ns after address and control stabilization. This supports effective throughput up to ~28.6 MHz random access cycles - verified under industrial temperature and 3.3 V ±0.3 V supply conditions per the official datasheet.
Does the 70V05L35J8 support true simultaneous read operations from both ports?
Yes, the 70V05L35J8 supports true simultaneous reads from both ports to the same or different memory locations. Its dual-port cell architecture allows concurrent left- and right-port read access without BUSY assertion or timing penalty - a core feature confirmed in the Functional Block Diagram and Truth Table I of the datasheet.
How is master/slave configuration implemented on the 70V05L35J8?
Master/slave configuration is controlled by the M/S pin: VIH configures the 70V05L35J8 as master (BUSYL/BUSYR become push-pull outputs), while VIL configures it as slave (BUSYL/BUSYR become inputs). This enables cascaded multi-device systems where one master coordinates arbitration and slaves respond - documented in the Pin Configurations and Features sections.
What is the function of the SEM pins on the 70V05L35J8?
The SEML and SEMR pins enable access to the internal 8-flag semaphore register. When asserted low (SEM = VIL), writes to I/O0–I/O7 with A0–A2 set the selected flag; reads return its state. This provides hardware-accelerated resource locking between ports - distinct from main memory access and detailed in Truth Table II and the Semaphore Read/Write Control section.
Can the 70V05L35J8 operate reliably at 3.0 V supply voltage?
Yes, the 70V05L35J8 is specified for VDD = 3.3 V ± 0.3 V, meaning it operates reliably from 3.0 V to 3.6 V. DC Electrical Characteristics tables confirm parameter compliance across this full range, including IDD, tAA, and logic thresholds - validated for industrial temperature operation without derating.
70V05L35J8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- 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:
- 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:
- 68-PLCC (24.21x24.21)
70V05L35J8 FAQ
1.How can I place an order for 70V05L35J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V05L35J8 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 70V05L35J8 reliable?
The price and inventory of 70V05L35J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V05L35J8 is usually 5 days.
3.What payment methods are accepted for 70V05L35J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V05L35J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V05L35J8?
70V05L35J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V05L35J8 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 70V05L35J8?
For technical support, including 70V05L35J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V05L35J8 requirements.
6.How does Aetrix verify that 70V05L35J8 is sourced from the original manufacturer or authorized distributors?
All 70V05L35J8 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 70V05L35J8 meets industry standards.
7.What is the process for return or replacement of 70V05L35J8?
All 70V05L35J8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V05L35J8, 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 70V05L35J8 part is unused and in its original packaging.
Return procedure for 70V05L35J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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