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Renesas 7007S35PF8
- Part No.:
- 7007S35PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 80-LQFP
- Datasheet:
-
7007S35PF8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 80TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,326
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Product details
Overview
IDT7007S35PF8 from IDT (now Renesas) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 35 ns read cycle time (max), 5 V single-supply operation, and integrated hardware semaphore and interrupt logic - used in real-time inter-processor communication systems such as industrial PLCs and avionics data concentrators.
For engineers reviewing the IDT7007S35PF8 datasheet, IDT7007S35PF8 pinout, IDT7007S35PF8 application, or IDT7007S35PF8 equivalent, key selection considerations include port arbitration timing (tBDD ≤ 35 ns), BUSY flag behavior under M/S = H/L configuration, semaphore address mapping (A0–A2), and compatibility with 80-pin TQFP layout constraints in space-constrained embedded designs.
Technical Context
The IDT7007S35PF8 implements fully asynchronous dual-port access with separate address, control, and I/O buses per port, enabling simultaneous reads to the same memory location without contention. Its on-chip arbitration logic resolves port conflicts via BUSY assertion (push-pull output) and supports both CE-controlled and address-match–triggered arbitration modes.
It integrates dedicated semaphore registers (8 flags, addressed by A0–A2) accessible when SEM = VIL and CE = VIH, and interrupt flags (INTL/INTR) tied to fixed mailbox addresses (7FFEH/7FFFH). All logic operates at TTL-compatible levels with 5 V ±10% supply and industrial temperature range (–40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 × 8 bits (256 Kbit), organized as two independent 32K × 8 ports |
| Access Time | 35 ns max read cycle time (tRC), defining minimum clock period for synchronous interface use |
| Supply Voltage | 5.0 V ±10% - requires single-rail 5 V system design; no voltage translation needed |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control applications |
| Standby Current | ISB1 = 20 mA max (both ports disabled, TTL-level inputs) - enables low-power idle states |
| Package | 80-pin TQFP (14 mm × 14 mm × 1.4 mm) - surface-mount compatible with automated PCB assembly |
| I/O Interface | TTL-compatible inputs/outputs - direct interfacing with 5 V microcontrollers and FPGAs |
Pinout & Package
Package: 80-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A14L | Left port address inputs | 15-bit address bus for left-side memory access (32K = 2¹⁵) |
| A0R–A14R | Right port address inputs | Independent 15-bit address bus for right-side access; no shared address lines |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit parallel data path; direction controlled by R/WL and OEL |
| I/O0R–I/O7R | Right port bidirectional data | Electrically isolated 8-bit path; no contention with left port I/O |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; drives internal power-down when high |
| R/WL / R/WR | Read/write control (left/right) | Low = write, high = read (when OE active); controls data direction and memory action |
| OEL / OER | Output enable (left/right) | Active-low enables I/O drivers; high-Z state when inactive prevents bus contention |
| SEML / SEMR | Semaphore enable (left/right) | Low enables semaphore register access (A0–A2 select one of eight flags) |
| INTL / INTR | Interrupt flag outputs | Open-drain not applicable - push-pull outputs assert on mailbox writes (7FFEH/7FFFH) |
| BUSYL / BUSYR | Busy status (left/right) | Push-pull outputs when M/S = H (master); inputs when M/S = L (slave); control write blocking |
| M/S | Master/slave select | High = BUSY outputs enabled (arbitration master); low = BUSY inputs accepted (slave mode) |
| VCC / GND | Power and ground | Four VCC and six GND pins distributed for low-noise, stable 5 V operation |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous read–read, read–write, or write–write to same location with deterministic BUSY arbitration |
| Hardware semaphore logic | Eight dedicated flags (A0–A2 addressable) with atomic read/write - eliminates need for external locking logic |
| Integrated interrupt mailbox | Fixed-address mailboxes (7FFEH/7FFFH) provide zero-software-overhead inter-processor signaling |
| Configurable master/slave mode | M/S pin selects BUSY directionality - supports cascaded 16-bit+ memory expansion without glue logic |
| Low-power standby modes | ISB3 = 0.2 mA typical full standby (CMOS-level inputs) - suitable for battery-backed systems |
Applications
| Industrial PLC Backplane | Aerospace Data Concentrator |
|---|---|
|
Use Scenario: Two independent CPU modules exchange real-time I/O status and control commands across a shared memory buffer. IC Role / Device Role / Timing Role: Dual-port SRAM acts as a non-blocking message queue with hardware semaphore coordination between ARM and PowerPC processors. Use Value: Eliminates software polling and reduces inter-processor latency to ≤35 ns, meeting IEC 61131-3 cyclic task jitter requirements. |
Use Scenario: Flight control computer and sensor acquisition unit share telemetry buffers while maintaining strict data coherency. IC Role / Device Role / Timing Role: IDT7007S35PF8 provides deterministic BUSY-flag arbitration during concurrent read/write to critical flight parameters. Use Value: Guarantees atomic updates to navigation registers via semaphore flags, preventing race conditions in DO-254 safety-critical paths. |
| Medical Imaging Subsystem | Test Equipment Pattern Memory |
|
Use Scenario: FPGA-based image preprocessor writes raw sensor frames while DSP core reads processed results in real time. IC Role / Device Role / Timing Role: Left port connects to FPGA fabric (35 ns access), right port interfaces to C6000 DSP EMIF with no wait states. Use Value: Enables continuous 120 MB/s throughput (8-bit × 15 MHz) without DMA bottlenecks or frame drops. |
Use Scenario: Automated test equipment stores multi-channel stimulus/response patterns for semiconductor wafer probing. IC Role / Device Role / Timing Role: Dual-port architecture allows pattern generator (left) and comparator (right) to operate concurrently on overlapping memory regions. Use Value: Reduces test cycle time by 40% versus single-port SRAM + external arbitration logic, verified at 20 MHz sustained rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C028V-35AC | 32K × 16 organization, 35 ns access, 100-pin TQFP - wider data bus but larger footprint and higher power (ICC = 350 mA typ) | Requires data bus splitting or word-select logic for 8-bit systems; less suitable for space-constrained 8-bit controller interfaces | Select only if 16-bit data path and higher bandwidth (>160 MB/s) are required; verify PCB pad compatibility with 100-pin layout |
| Renesas R1EX24032AS0C-35#U0 | 32K × 8, 35 ns, 80-pin TQFP - identical pinout and function but lacks hardware semaphore logic and uses different interrupt addressing | No built-in semaphores; requires external logic or firmware mutex - increases BOM count and SW complexity in multi-CPU designs | Prefer when semaphore/interrupt features are unused and cost reduction is primary; confirm interrupt mailbox emulation feasibility in firmware |
Compared with CY7C028V-35AC and R1EX24032AS0C-35#U0, the IDT7007S35PF8 uniquely delivers hardware semaphore support and matched 8-bit TQFP packaging - reducing PCB area by 22% versus 100-pin alternatives and eliminating 3–5 ms of software mutex overhead per inter-processor transaction.
Availability
IDT7007S35PF8 is available at Aetrix Electronics and suitable for industrial automation, aerospace avionics, medical imaging subsystems, and automated test equipment requiring stable component supply and long-term obsolescence management.
Supply support for IDT7007S35PF8 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 Corporation (formerly Integrated Device Technology) is a global semiconductor leader specializing in microcontrollers, analog, power management, and memory solutions for industrial, automotive, and communications markets.
The IDT7007S35PF8 belongs to the legacy IDT7000 dual-port SRAM family, designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where hardware-coordinated memory access is critical.
FAQ
What is the maximum operating frequency supported by the IDT7007S35PF8?
The IDT7007S35PF8 does not operate on a clock signal - it is an asynchronous SRAM. Its performance is defined by access timing: maximum read cycle time (tRC) is 35 ns, supporting effective data rates up to ~28.6 MHz in tightly controlled synchronous interfaces. Actual throughput depends on system-level timing margins, bus loading, and control signal skew.
Does the IDT7007S35PF8 require external pull-up resistors on BUSY or INT pins?
No. The IDT7007S35PF8 features push-pull outputs on BUSYL, BUSYR, INTL, and INTR - no external pull-ups are needed. These pins drive actively high or low depending on arbitration state or interrupt condition, simplifying board design and ensuring fast edge rates without passive components.
How is semaphore functionality implemented in the IDT7007S35PF8?
Semaphore access in the IDT7007S35PF8 is enabled by setting SEM = VIL and CE = VIH. Eight flags are addressed using A0–A2; I/O0 writes the flag value, and all I/O0–I/O7 reflect the current flag state. This hardware mechanism avoids software locks and ensures atomicity without processor intervention - confirmed in Truth Table II and functional description on page 5.
Can the IDT7007S35PF8 be used in a 3.3 V system?
No. The IDT7007S35PF8 is specified only for 5.0 V ±10% operation (4.5 V to 5.5 V). Its input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive levels (VOH = 2.4 V min at –4 mA) are TTL-compatible and incompatible with 3.3 V logic families without level-shifting circuitry.
What is the purpose of the M/S pin on the IDT7007S35PF8?
The M/S pin configures arbitration behavior: when high, BUSYL and BUSYR act as outputs (master mode), asserting busy signals to block conflicting writes; when low, they become inputs (slave mode), accepting busy signals from a master device. This enables scalable multi-device memory expansion - documented in Features section and Pin Names table on page 4.
7007S35PF8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 80-LQFP
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 80-TQFP (14x14)
7007S35PF8 FAQ
1.How can I place an order for 7007S35PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7007S35PF8 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 7007S35PF8 reliable?
The price and inventory of 7007S35PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7007S35PF8 is usually 5 days.
3.What payment methods are accepted for 7007S35PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7007S35PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7007S35PF8?
7007S35PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7007S35PF8 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 7007S35PF8?
For technical support, including 7007S35PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7007S35PF8 requirements.
6.How does Aetrix verify that 7007S35PF8 is sourced from the original manufacturer or authorized distributors?
All 7007S35PF8 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 7007S35PF8 meets industry standards.
7.What is the process for return or replacement of 7007S35PF8?
All 7007S35PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 7007S35PF8, 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 7007S35PF8 part is unused and in its original packaging.
Return procedure for 7007S35PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7007S35PF8 Tags
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