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Renesas 7005S35PFI
- Part No.:
- 7005S35PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7005S35PFI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,466
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Product details
Overview
7005S35PFI from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right port access, 35 ns max read cycle time (tRC), TTL-compatible 5V ±10% supply, and integrated semaphore/arbitration logic-used in real-time interprocessor communication systems requiring concurrent memory access without external logic.
For engineers reviewing the 7005S35PFI datasheet, 7005S35PFI pinout, 7005S35PFI application, or 7005S35PFI equivalent, key selection criteria include BUSY-flag arbitration timing (tBDD ≤ 35 ns), dual-port data retention at 2V (L-version only), and Master/Slave configuration via M/S pin for 16-bit+ bus expansion.
Technical Context
The 7005S35PFI implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port (A0L–A12L/I/O0L–I/O7L and A0R–A12R/I/O0R–I/O7R), enabling simultaneous reads from identical addresses. Its on-chip arbitration logic resolves contention using BUSY flag assertion (push-pull output) and priority setup time tAPS = 5 ns.
It supports two distinct memory access modes: RAM mode (CE = LOW, SEM = HIGH) and semaphore mode (CE = HIGH, SEM = LOW), with dedicated interrupt flag registers (INTL/INTR) set/cleared via specific address writes (e.g., A12–A0 = 1FFFh). The M/S pin configures BUSYL/BUSYR as output (Master) or input (Slave) to enable cascaded multi-device systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit total), two independent 8-bit ports |
| Max Read Cycle Time (tRC) | 35 ns - defines minimum time between successive read operations on same port |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; no dual-supply required |
| Operating Temperature | –40°C to +85°C - industrial-grade rating confirmed for this speed grade |
| Active Current (ICC) | 150 mA typical (both ports active, f = fMAX) - determines thermal design and power budget |
| Standby Current (ISB1) | 13 mA typical (both ports disabled, TTL-level inputs) - enables low-power idle states |
| Package | 64-pin TQFP (PNG64) - 14 mm × 14 mm body, surface-mount compatible |
Pinout & Package
7005S35PFI is housed in a 64-pin thin quad flatpack (TQFP, package code PNG64) with 0.5 mm pitch, 14 mm × 14 mm footprint, and 1.4 mm height. Pin 1 marked by dot; top view shown in datasheet drawing 2738 drw 03.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; controls power-up/down of respective port circuitry |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write enable; HIGH = read, LOW = write - defines data direction per port |
| OEL / OER | Output Enable (Left / Right) | Active-low tri-state control for I/O drivers; disables outputs without disabling memory core |
| A0L–A12L / A0R–A12R | Address Inputs (Left / Right) | 13-bit address bus per port; accesses full 8K depth independently |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (Left / Right) | Bidirectional 8-bit data bus per port; shares pins for read/write - no separate DQ/DQ̅ |
| SEML / SEMR | Semaphore Enable (Left / Right) | Active-low select for semaphore register access (A0–A2 address semaphore flags) |
| INTL / INTR | Interrupt Flag Output (Left / Right) | Open-drain compatible push-pull outputs; asserted by write to 1FFEh/1FFFh addresses |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Push-pull outputs when M/S = HIGH (Master); inputs when M/S = LOW (Slave) - enables hardware arbitration |
| M/S | Master/Slave Select | HIGH = BUSYL/BUSYR are outputs (Master); LOW = BUSYL/BUSYR are inputs (Slave) |
| VCC / GND | Power / Ground | Multiple VCC (pins 8, 22, 37, 49, 64) and GND (pins 7, 21, 36, 48, 63) pins - decoupling critical for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Simultaneous independent read/write access to same memory location - eliminates software polling or external arbitration logic |
| Hardware semaphore support | Eight dedicated semaphore flags (addressed by A0–A2) with atomic read/write - enables reliable inter-processor synchronization |
| On-chip arbitration logic | Automatic BUSY flag assertion with tAPS = 5 ns setup time - guarantees deterministic resolution of port contention |
| Master/Slave cascading | M/S pin configures device as Master (BUSY output) or Slave (BUSY input) - allows seamless expansion to 16-bit+ data buses |
| 2V data retention | Retains memory contents down to 2V supply - supports battery backup operation without external circuitry |
Applications
| Real-Time Interprocessor Communication | Digital Signal Processing Buffering |
|---|---|
Use Scenario: Two microcontrollers exchange sensor data and control commands via shared memory without shared bus conflicts. IC Role / Device Role / Timing Role: Dual-port RAM acts as zero-latency mailbox; left port serves CPU-A, right port serves CPU-B. Use Value: Eliminates need for handshake protocols or external FIFOs; tBDD ≤ 35 ns ensures rapid resolution of simultaneous access attempts. |
Use Scenario: DSP and host processor share streaming audio buffers for real-time filtering and playback control. IC Role / Device Role / Timing Role: Provides concurrent read (DSP) and write (host) access to circular buffer memory space. Use Value: Sustains 35 ns read cycles while supporting burst writes - prevents pipeline stalls during high-throughput data transfer. |
| Industrial PLC Memory Coherency | Avionics System Data Exchange |
Use Scenario: Programmable logic controller uses dual CPUs for safety monitoring and motion control, sharing status and command registers. IC Role / Device Role / Timing Role: Acts as coherent shared memory with hardware semaphore flags for task coordination. Use Value: Semaphore registers (A0–A2) provide atomic lock/unlock - prevents race conditions in SIL2-certified firmware. |
Use Scenario: Flight management computer and inertial navigation unit exchange position and attitude data with deterministic latency. IC Role / Device Role / Timing Role: Serves as fault-tolerant shared memory with BUSY-driven arbitration under MIL-PRF-38535 QML compliance. Use Value: Industrial temperature range (–40°C to +85°C) and 35 ns timing guarantee meet DO-254 timing closure requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-35JC | 35 ns access, 8K × 8, 5V, 68-pin PLCC - lacks integrated semaphore logic and M/S cascading capability | Requires external logic for semaphore signaling and multi-device bus expansion | Select when legacy PLCC footprint or absence of semaphore features simplifies design |
| IDT70V25L25PF | 3.3V supply, 25 ns, 8K × 16, 100-pin TQFP - wider data bus but incompatible voltage and pinout | Not drop-in replaceable; requires PCB redesign and level-shifting for 5V systems | Select for new 3.3V designs needing higher bandwidth and lower power, not for 7005S35PFI replacement |
Compared with CY7C136-35JC and IDT70V25L25PF, the 7005S35PFI uniquely delivers 5V-compatible dual-port operation with on-chip semaphore and Master/Slave arbitration in a compact 64-pin TQFP - reducing BOM count and layout complexity for industrial interprocessor links.
Availability
7005S35PFI is available at Aetrix Electronics and suitable for real-time interprocessor communication, digital signal processing buffering, and industrial PLC memory coherency requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 7005S35PFI 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 semiconductor company specializing in timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics.
The IDT7005 family was designed specifically for high-reliability dual-ported memory applications in military, industrial, and communications systems where deterministic arbitration and seamless bus expansion are critical.
FAQ
What is the maximum operating temperature range supported by the 7005S35PFI?
The 7005S35PFI is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the "Maximum Operating Temperature and Supply Voltage" table (2738 tbl 05) and explicitly stated in the product description for selected speeds and packages. This rating applies to the "S" speed grade at 35 ns timing.
Does the 7005S35PFI support battery backup operation?
Yes, the 7005S35PFI supports 2V data retention, meaning it maintains stored memory contents when VCC drops to 2V - a feature confirmed in the "Data Retention Characteristics" section (2738 tbl 09) and functional description. This enables direct connection to backup batteries without additional regulators or switches.
How does the M/S pin affect BUSY signal behavior on the 7005S35PFI?
When M/S = HIGH, BUSYL and BUSYR function as push-pull outputs (Master mode), asserting BUSY to block conflicting writes. When M/S = LOW, BUSYL and BUSYR become inputs (Slave mode), allowing external arbitration signals to control write inhibition - as defined in Notes 1 and 2 of the Pin Names table (2738 tbl 01).
Can the 7005S35PFI perform simultaneous reads from both ports to the same memory address?
Yes, the 7005S35PFI features true dual-ported memory cells that allow simultaneous reads from identical addresses on left and right ports without contention or timing penalty - a core feature highlighted in the "Features" section and verified by the "Truth Table I" for non-contention operation (2738 tbl 02).
What package type is used for the 7005S35PFI, and what are its mechanical dimensions?
The 7005S35PFI uses a 64-pin thin quad flatpack (TQFP) package, designated PNG64. Its body measures approximately 14 mm × 14 mm × 1.4 mm, as specified in the "Pin Configurations" note 3 (2738 drw 03) and confirmed in the ordering information section.
7005S35PFI 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (14x14)
7005S35PFI FAQ
1.How can I place an order for 7005S35PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7005S35PFI 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 7005S35PFI reliable?
The price and inventory of 7005S35PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7005S35PFI is usually 5 days.
3.What payment methods are accepted for 7005S35PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7005S35PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7005S35PFI?
7005S35PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7005S35PFI 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 7005S35PFI?
For technical support, including 7005S35PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7005S35PFI requirements.
6.How does Aetrix verify that 7005S35PFI is sourced from the original manufacturer or authorized distributors?
All 7005S35PFI 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 7005S35PFI meets industry standards.
7.What is the process for return or replacement of 7005S35PFI?
All 7005S35PFI units undergo pre-shipment inspection (PSI). If there is an issue with 7005S35PFI, 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 7005S35PFI part is unused and in its original packaging.
Return procedure for 7005S35PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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