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Renesas 7007S35JI8
- Part No.:
- 7007S35JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7007S35JI8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,382
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Product details
Overview
IDT7007S35JI8 from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 35 ns read cycle time, industrial temperature range (–40°C to +85°C), and TTL-compatible 5 V ±10% supply - used in real-time interprocessor communication systems requiring simultaneous memory access without arbitration logic.
For engineers reviewing the IDT7007S35JI8 datasheet, IDT7007S35JI8 pinout, IDT7007S35JI8 application, or IDT7007S35JI8 equivalent, key selection criteria include BUSY/INT flag timing, semaphore support for resource locking, master/slave cascading capability, and low-power standby modes under CE control.
Technical Context
The IDT7007S35JI8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port. It integrates on-chip arbitration logic, push-pull BUSY/INT outputs, and full hardware semaphore signaling across eight flags addressed via A0–A2.
Its M/S pin configures master (BUSY output) or slave (BUSY input) mode for cascaded 16-bit+ systems; semaphore access requires CE = VIH and SEM = VIL, while RAM access requires CE = VIL and SEM = VIH - ensuring strict functional separation between memory and synchronization resources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32K × 8 bits (256 Kbit), enabling 32,768 independent 8-bit word accesses per port |
| Read Cycle Time | 35 ns max - defines minimum interval between successive reads on same port |
| Operating Voltage | 5.0 V ±10% - compatible with legacy TTL logic families without level shifting |
| Temperature Range | –40°C to +85°C - qualified for industrial embedded control and communications equipment |
| Standby Current | 20 mA max (ISB1, both ports disabled) - enables low-power idle states in battery-backed or energy-sensitive systems |
| Bus Interface | True dual-port with independent I/O0–I/O7L/R, A0–A14L/R, and control pins - eliminates external multiplexing or glue logic |
| Arbitration Logic | On-chip BUSY flag generation with tAPS = 5 ns setup - resolves port contention without external priority encoder |
Pinout & Package
IDT7007S35JI8 is packaged in an 80-pin TQFP (Thin Quad Flat Package) with 14 mm × 14 mm body and 1.4 mm height, pin pitch 0.5 mm. All VCC pins require local decoupling; all GND pins must be connected to system ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable controlling power-down of respective port; high = standby mode |
| R/WL / R/WR | Read/Write Control (Left / Right) | Low = write, high = read; must be stable during address transitions |
| OEL / OER | Output Enable (Left / Right) | Active-low control of I/O drivers; allows tri-state sharing of data bus |
| A0L–A14L / A0R–A14R | Address Inputs (Left / Right) | 15-bit address bus per port - supports full 32K-word addressing independently |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (Left / Right) | Bidirectional 8-bit data path per port; no direction pin required due to R/W-controlled driver enable |
| SEML / SEMR | Semaphore Enable (Left / Right) | Active-low signal selecting semaphore register access instead of RAM array |
| INTL / INTR | Interrupt Flag Output (Left / Right) | Push-pull active-high flags asserted when opposite port writes to mailbox addresses 7FFE/7FFF |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Push-pull output (master) or input (slave); blocks write when asserted low during address contention |
| M/S | Master/Slave Select | High = BUSY outputs enabled (master); low = BUSY inputs accepted (slave) for daisy-chained configurations |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous read/write to same location - critical for lock-free interprocessor messaging |
| Hardware Semaphore Support | Eight dedicated flags accessible via A0–A2, eliminating software spinlocks and reducing CPU overhead |
| Configurable Master/Slave Mode | M/S pin enables seamless 16-bit expansion using multiple IDT7007 devices without external arbitration logic |
| Push-Pull BUSY/INT Outputs | Eliminates need for external pull-ups and ensures fast, deterministic flag assertion in real-time systems |
| Automatic Power-Down | CE-driven standby reduces current to 20 mA (ISB1) - extends uptime in power-constrained applications |
Applications
| Industrial PLC Communication | Avionics Data Exchange |
|---|---|
Use Scenario: Two independent microcontrollers exchange sensor and actuator data in real time within a programmable logic controller chassis. IC Role / Device Role / Timing Role: IDT7007S35JI8 serves as shared mailbox memory with BUSY arbitration preventing concurrent writes to same address. Use Value: Eliminates need for external arbitration logic and guarantees deterministic <35 ns read latency for time-critical I/O updates. | Use Scenario: Flight control computer and navigation processor share telemetry and command buffers in DO-254-compliant avionics hardware. IC Role / Device Role / Timing Role: IDT7007S35JI8 provides fault-tolerant dual-port SRAM with interrupt-driven mailbox signaling for cross-processor event notification. Use Value: INTL/INTR flags reduce polling overhead by >90%, and –40°C to +85°C rating ensures operation across aircraft environmental profiles. |
| Medical Imaging Subsystem | Test Equipment Pattern Memory |
Use Scenario: FPGA-based image acquisition engine streams raw pixel data into memory while DSP core processes prior frames. IC Role / Device Role / Timing Role: IDT7007S35JI8 acts as zero-wait-state frame buffer with independent left/right ports synchronized via semaphore flags. Use Value: 35 ns access time sustains >28 MB/s sustained bandwidth, and hardware semaphores prevent frame corruption during handoff. | Use Scenario: Automated test equipment stores stimulus/response patterns for semiconductor device validation at multi-MHz rates. IC Role / Device Role / Timing Role: IDT7007S35JI8 functions as high-speed pattern memory with CE-controlled power-down between test sequences. Use Value: ISB1 ≤ 20 mA standby current minimizes thermal load in densely packed ATE backplanes, and dual-port design enables parallel load/execute cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C028V-35AC | 32K × 8, 35 ns, 3.3 V supply only; no M/S pin or integrated semaphore logic | Requires external level shifters for 5 V systems; lacks hardware semaphore support | Select when migrating to 3.3 V designs and implementing software-based resource locking |
| AS7C3256A-35JC | 32K × 8, 35 ns, 5 V supply; no BUSY/INT flags or on-chip arbitration | Needs discrete logic for port contention resolution; no interrupt mailbox functionality | Choose for cost-sensitive applications where arbitration and interrupts are handled in firmware |
Compared with CY7C028V-35AC and AS7C3256A-35JC, IDT7007S35JI8 uniquely delivers integrated 5 V dual-port operation with hardware semaphore, BUSY arbitration, and interrupt mailbox - reducing BOM count and improving determinism in real-time interprocessor systems.
Availability
IDT7007S35JI8 is available at Aetrix Electronics and suitable for industrial PLC communication, avionics data exchange, medical imaging subsystems, and automated test equipment requiring stable component supply and long-term lifecycle support.
Supply support for IDT7007S35JI8 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor signal conditioning ICs, now part of Renesas Electronics since 2019.
IDT7007S35JI8 belongs to the IDT7007 family of high-speed dual-port SRAMs designed specifically for deterministic interprocessor communication in industrial, aerospace, and medical systems requiring zero-latency shared memory access.
FAQ
What is the maximum operating temperature range for the IDT7007S35JI8?
IDT7007S35JI8 is rated for industrial temperature operation from –40°C to +85°C, verified per manufacturer specifications and qualified for use in harsh-environment embedded systems such as factory automation controllers and outdoor communications equipment.
Does the IDT7007S35JI8 support true simultaneous read operations on both ports?
Yes, IDT7007S35JI8 features true dual-ported memory cells that allow independent, asynchronous reads from both left and right ports to the same or different addresses without conflict or performance penalty - confirmed in the functional block diagram and truth tables of the official datasheet.
How does the M/S pin affect BUSY signal behavior on the IDT7007S35JI8?
When M/S = H, IDT7007S35JI8 operates as a master with BUSYL and BUSYR as push-pull outputs asserting low during port contention; when M/S = L, it operates as a slave with BUSYL/BUSYR as inputs that inhibit writes when driven low by a master - enabling scalable multi-device memory expansion.
Can the IDT7007S35JI8 be used in 3.3 V systems?
No, IDT7007S35JI8 requires a 5.0 V ±10% supply (4.5 V to 5.5 V) and is not 3.3 V tolerant; applying 3.3 V will result in undefined operation and failure to meet AC timing specifications including the 35 ns read cycle.
What is the function of the SEM pins on the IDT7007S35JI8?
SEML and SEMR pins enable hardware semaphore register access: when SEM = VIL and CE = VIH, the device routes I/O0–I/O7 to eight dedicated semaphore flags addressed by A0–A2 - providing atomic resource-locking capability without software intervention or additional logic.
7007S35JI8 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:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7007S35JI8 FAQ
1.How can I place an order for 7007S35JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7007S35JI8 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 7007S35JI8 reliable?
The price and inventory of 7007S35JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7007S35JI8 is usually 5 days.
3.What payment methods are accepted for 7007S35JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7007S35JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7007S35JI8?
7007S35JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7007S35JI8 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 7007S35JI8?
For technical support, including 7007S35JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7007S35JI8 requirements.
6.How does Aetrix verify that 7007S35JI8 is sourced from the original manufacturer or authorized distributors?
All 7007S35JI8 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 7007S35JI8 meets industry standards.
7.What is the process for return or replacement of 7007S35JI8?
All 7007S35JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7007S35JI8, 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 7007S35JI8 part is unused and in its original packaging.
Return procedure for 7007S35JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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