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Renesas 7005L35PFI8
- Part No.:
- 7005L35PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7005L35PFI8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,887
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Product details
Overview
7005L35PFI8 from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right port access, 35 ns maximum read cycle time (tRC), 2V data retention capability, and integrated hardware semaphore/arbitration logic - deployed in real-time inter-processor communication systems requiring concurrent memory access without external logic.
For engineers reviewing the 7005L35PFI8 datasheet, 7005L35PFI8 pinout, 7005L35PFI8 application, or 7005L35PFI8 equivalent, this device serves as a drop-in solution for legacy dual-port SRAM designs demanding industrial temperature operation (−40°C to +85°C), low-power standby (1 µA typ.), and deterministic BUSY/INT flag signaling in tightly coupled multi-CPU architectures.
Technical Context
The 7005L35PFI8 implements fully asynchronous dual-port architecture 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 memory locations. Its on-chip arbitration logic resolves contention via BUSY flag assertion (tBDD ≤ 35 ns) and supports Master/Slave cascading using M/S pin for 16-bit+ bus expansion.
It integrates dedicated semaphore registers (8 flags, addressed by A0–A2) with atomic read/write control (SEM = VIL), interrupt generation (INTL/INTR) triggered by specific address writes (e.g., 1FFFH), and automatic power-down via independent CE pins - all operating from a single 5.0 V ±10% TTL-compatible supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit), two independent 13-bit address spaces (A0L–A12L / A0R–A12R) |
| Access Time (tRC) | 35 ns max - guarantees full-speed operation in 28.6 MHz synchronous bus interfaces |
| Supply Voltage | 5.0 V ±10% - compatible with legacy TTL logic families without level-shifting |
| Standby Current | 1 µA typical - enables battery-backed data retention at 2 V for >10 years |
| Operating Temperature | −40°C to +85°C - qualified for industrial embedded control and avionics subsystems |
| Package | 64-pin TQFP (PNG64), 14 mm × 14 mm × 1.4 mm - surface-mount compatible with automated assembly |
| I/O Interface | TTL-compatible inputs/outputs - eliminates need for external bus interface logic |
Pinout & Package
64-pin thin quad flatpack (TQFP, package code PNG64), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L | Left port address inputs | 13-bit address bus for left-side memory access; independent of right port addressing |
| A0R–A12R | Right port address inputs | 13-bit address bus for right-side memory access; no shared address lines with left port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path for reads/writes; tri-stated when OEL = H or CEL = H |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path for reads/writes; tri-stated when OER = H or CER = H |
| CEL / CER | Left/right chip enable | Active-low enables respective port; controls power-down mode independently per port |
| R/WL / R/WR | Left/right read/write control | Active-low write enable; high = read; determines direction of I/O bus transfer |
| OEL / OER | Left/right output enable | Active-low enables output drivers; overrides R/W state for read-only access control |
| SEML / SEMR | Left/right semaphore enable | Active-low selects semaphore register access (A0–A2) instead of memory array |
| INTL / INTR | Left/right interrupt flags | Open-drain outputs asserted low on address-matched interrupt writes (e.g., 1FFEH) |
| BUSYL / BUSYR | Left/right busy flags | Push-pull outputs (M/S = H) or inputs (M/S = L); indicate port contention during simultaneous access |
| M/S | Master/Slave select | H = BUSY outputs active (master); L = BUSY inputs accepted (slave); enables daisy-chain configuration |
| VCC / GND | Power and ground | Multiple VCC/GND pins distributed for low-noise operation; all must be connected |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous read access to same location from both ports - eliminates arbitration wait states in lock-free buffer designs |
| Hardware semaphore logic | Eight dedicated flags (A0–A2) with atomic read/write - provides deterministic resource locking across CPUs without software overhead |
| On-chip arbitration with BUSY signaling | tBDD ≤ 35 ns ensures rapid resolution of port contention; supports priority-based access via tAPS = 5 ns setup |
| 2V data retention mode | Retains full 8K × 8 content at 2 V supply - enables seamless battery backup during main power loss |
| Master/Slave cascading support | M/S pin configures device as master (BUSY output) or slave (BUSY input) - allows 16-bit+ word systems without external glue logic |
Applications
| Real-Time Multi-CPU Communication | Digital Signal Processor (DSP) Co-Processing |
|---|---|
|
Use Scenario: Two ARM Cortex-M7 cores share sensor fusion data via shared memory without OS-level mutexes. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency inter-core buffer with hardware semaphore coordination. Use Value: Eliminates software arbitration delays; 35 ns tRC enables sub-30 ns inter-core message latency. |
Use Scenario: DSP offloads FFT computation while host MCU manages I/O and scheduling. IC Role / Device Role / Timing Role: Provides synchronized data exchange between DSP and host via independent left/right ports. Use Value: Prevents pipeline stalls during DMA bursts; BUSY flag blocks conflicting writes during critical window. |
| Industrial PLC Memory Expansion | Avionics Data Acquisition Buffer |
|
Use Scenario: Programmable logic controller uses dual-port RAM to isolate real-time I/O scanning from HMI update tasks. IC Role / Device Role / Timing Role: Left port handles cyclic I/O scan; right port services Ethernet stack updates. Use Value: Guarantees deterministic 85°C operation; 1 µA ISB3 enables energy-efficient standby during idle cycles. |
Use Scenario: Flight data recorder buffers sensor streams from multiple ADCs before compression and storage. IC Role / Device Role / Timing Role: Acts as fault-tolerant acquisition buffer with battery-backed retention during power interruption. Use Value: 2V data retention preserves last 64 KB of telemetry even after main power failure. |
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-35AXC | 35 ns tRC, 8K × 8, but requires 3.3 V supply and lacks 2V data retention | Suitable for newer 3.3 V systems; not drop-in for 5 V legacy designs | Select when migrating to lower-voltage platforms and external battery backup is acceptable |
| IS61LV5128-35TL | 35 ns tRC, 512K × 8, single-port only; no BUSY/semaphore logic | Requires external arbitration logic for multi-CPU use; higher density but no dual-port functionality | Choose only if memory depth is primary constraint and dual-port features are unnecessary |
Compared with CY7C028V-35AXC and IS61LV5128-35TL, the 7005L35PFI8 uniquely delivers 5 V compatibility, integrated hardware arbitration, and 2 V battery retention - making it irreplaceable in industrial and avionics systems where voltage stability, deterministic timing, and fail-safe data preservation are mandatory.
Availability
7005L35PFI8 is available at Aetrix Electronics and suitable for real-time multi-CPU communication, industrial PLC memory expansion, and avionics data acquisition buffer applications requiring stable component supply across extended product lifecycles.
Supply support for 7005L35PFI8 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 high-performance timing, memory, and interface solutions, now part of Renesas Electronics.
The IDT7005 family was designed specifically for deterministic inter-processor communication in industrial control, telecommunications switching, and military computing - emphasizing hardware-enforced concurrency control and robust operation across extreme temperatures.
FAQ
What is the guaranteed maximum access time for the 7005L35PFI8?
The 7005L35PFI8 has a guaranteed maximum read cycle time (tRC) of 35 ns across its full industrial temperature range (−40°C to +85°C). This value is production-tested and applies to both ports under worst-case VCC = 4.5 V and TA = +85°C conditions, ensuring deterministic timing in real-time systems.
Does the 7005L35PFI8 support battery backup operation?
Yes, the 7005L35PFI8 supports true battery backup operation with 2 V data retention capability. When VCC drops to 2 V, the device retains full 8K × 8 memory content with typical current draw of 100 µA - verified across military and industrial temperature ranges per datasheet Table 9.
How does the M/S pin affect BUSY signal behavior on the 7005L35PFI8?
When M/S = H, the 7005L35PFI8 operates as a master: BUSYL and BUSYR are push-pull outputs that assert low during port contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that must be driven low by a master device to inhibit writes - enabling hierarchical arbitration in multi-device systems.
Can the 7005L35PFI8 perform simultaneous reads from both ports to the same memory address?
Yes, the 7005L35PFI8 uses true dual-port memory cells that allow simultaneous reads from identical addresses on left and right ports without contention, delay, or data corruption - a core architectural feature confirmed in the Functional Block Diagram and Truth Table I of the datasheet.
What is the purpose of the SEM pin on the 7005L35PFI8?
The SEM (Semaphore Enable) pin on the 7005L35PFI8 selects between memory array access (SEM = VIH) and semaphore register access (SEM = VIL). When active low, it enables atomic read/write operations to eight dedicated hardware semaphore flags addressed by A0–A2 - providing lock-free resource synchronization between processors.
7005L35PFI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-LQFP
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (14x14)
7005L35PFI8 FAQ
1.How can I place an order for 7005L35PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7005L35PFI8 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 7005L35PFI8 reliable?
The price and inventory of 7005L35PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7005L35PFI8 is usually 5 days.
3.What payment methods are accepted for 7005L35PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7005L35PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7005L35PFI8?
7005L35PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7005L35PFI8 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 7005L35PFI8?
For technical support, including 7005L35PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7005L35PFI8 requirements.
6.How does Aetrix verify that 7005L35PFI8 is sourced from the original manufacturer or authorized distributors?
All 7005L35PFI8 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 7005L35PFI8 meets industry standards.
7.What is the process for return or replacement of 7005L35PFI8?
All 7005L35PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7005L35PFI8, 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 7005L35PFI8 part is unused and in its original packaging.
Return procedure for 7005L35PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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