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Renesas 71342SA35PF8
- Part No.:
- 71342SA35PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342SA35PF8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,473
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Product details
Overview
IDT71342SA35PF8 from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 35 ns max read cycle time, 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports fully asynchronous, independent left/right port access and enables interprocessor resource arbitration in real-time embedded control systems.
For engineers reviewing the IDT71342SA35PF8 datasheet, IDT71342SA35PF8 pinout, IDT71342SA35PF8 application, or IDT71342SA35PF8 equivalent, this device delivers deterministic port-to-port timing, hardware semaphore contention resolution, low-power standby modes, and TTL-compatible I/O for legacy bus interfacing in multiprocessor data acquisition and motion control architectures.
Technical Context
The IDT71342SA35PF8 implements two fully independent asynchronous SRAM ports sharing a single 4K × 8 memory array and an isolated 3-bit addressable (A0–A2) semaphore register space. Semaphore access requires SEM = VIL and CE = VIH, decoupling flag control from main memory operations.
Its CMOS architecture supports simultaneous read/write across ports with no internal arbitration delay-conflict resolution occurs only during concurrent writes to non-semaphore addresses. The automatic power-down feature activates when both CE and SEM are HIGH, reducing full-standby current to 1.0 mA (typ.) at 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32,768 bits), dual-port with separate left/right address/data/control |
| Max Read Cycle Time | 35 ns - defines minimum clock period for synchronous bus interface or maximum throughput in burst transfers |
| Supply Voltage | 5.0 V ±10% - compatible with legacy 5 V TTL/CMOS logic families without level shifting |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation and motor drive control environments |
| Full Standby Current | 1.0 mA (typ.) - enables low-power sleep mode during processor idle periods without data loss |
| Semaphore Address Space | 8 flags (A0–A2), accessed via dedicated SEM pin - provides hardware-enforced mutual exclusion without software polling overhead |
| I/O Compatibility | TTL-level inputs and outputs - ensures direct connection to microcontrollers, FPGAs, and ASICs with 5 V I/O rails |
Pinout & Package
Package: 64-pin TQFP (PNG64), body size 14 mm × 14 mm × 1.4 mm, lead-free and RoHS compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access; A0–A2 also select semaphore flag when SEM = VIL |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access; independent timing and decoding from left port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; high-impedance when OE = VIH or CE = VIH; drives valid data within tAOE after enable |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; electrically isolated from left port I/O; supports concurrent read/write with no bus contention |
| CEL / CER | Left/right chip enable | Active-low enables respective port; deassertion places port into standby (ISB1/ISB2/ISB3/ISB4 dependent on input levels) |
| OEL / OER | Left/right output enable | Active-low controls output drivers; allows read-only access while write paths remain disabled |
| R/WL / R/WR | Left/right write enable | Active-low initiates write cycle; combined with CE and address setup defines tWP and tDW timing windows |
| SEML / SEMR | Semaphore flag status outputs | Open-drain, active-low signals indicating token ownership; used for hardware handshake outside memory interface |
| SEM | Semaphore select | Active-low enables semaphore address space (A0–A2); must be VIH for normal RAM access |
| VCC / GND | Power supply | All VCC pins must be connected to 5 V ±10%; all GND pins tied to common ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Hardware semaphore arbitration | Eight dedicated binary flags with atomic set/test capability per port, eliminating software spin-lock latency |
| Port-to-port write/read delay | tDDD = 35 ns max - guarantees deterministic data visibility from writing port to reading port for real-time synchronization |
| Independent power-down control | CE + SEM HIGH disables each port's circuitry separately, enabling asymmetric low-power states (e.g., left port active, right port in ISB3) |
| Simultaneous dual-port operation | No internal arbitration logic - full bandwidth available to both ports unless accessing same memory location or semaphore flag |
| Industrial-grade reliability | Qualified over –40°C to +85°C with 100% burn-in and accelerated life testing per JESD22-A108 |
Applications
| Motor Control Co-Processor Interface | Real-Time Data Acquisition Buffer |
|---|---|
Use Scenario: Dual-core motion controller where one MCU handles trajectory planning and the other executes PWM updates and encoder feedback loops. IC Role / Device Role / Timing Role: IDT71342SA35PF8 serves as shared memory with hardware semaphore coordination, enabling lock-free exchange of position setpoints and status flags between cores. Use Value: Eliminates 10–15 µs software arbitration delays, ensuring sub-50 µs inter-core handshaking for 20 kHz servo loop execution. |
Use Scenario: High-speed analog capture system using FPGA front-end and ARM host processor, requiring synchronized buffer management. IC Role / Device Role / Timing Role: IDT71342SA35PF8 acts as ping-pong FIFO with semaphore-controlled buffer ownership transfer between FPGA (writer) and ARM (reader). Use Value: Enables continuous 10 MS/s streaming without DMA stalls or CPU polling, leveraging tWDD ≤ 60 ns and tHZ ≤ 20 ns for rapid output disable. |
| Distributed PLC I/O Module | Avionics Sensor Fusion Hub |
Use Scenario: Modular programmable logic controller with hot-swappable I/O cards communicating via backplane with central CPU. IC Role / Device Role / Timing Role: IDT71342SA35PF8 provides shared configuration and status memory between card-local microcontroller and backplane master, with semaphores managing register update sequences. Use Value: Guarantees atomic parameter updates under EMI stress, preventing partial writes that could cause misconfiguration or watchdog timeouts. |
Use Scenario: Safety-critical flight control unit integrating inertial, GPS, and air data sensors with redundant processing channels. IC Role / Device Role / Timing Role: IDT71342SA35PF8 stores validated sensor outputs and health metrics, with semaphores enforcing strict read-after-write ordering between primary and backup processors. Use Value: Meets DO-254 Level A timing assurance requirements by eliminating race conditions in cross-channel data validation paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM with semaphore applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C024AV-35AXC | 35 ns access, 4K × 16 organization, 3.3 V core (5 V tolerant I/O), no integrated semaphore logic | Requires external logic or firmware for resource arbitration; higher density but wider data bus | Choose when system uses 3.3 V logic and can implement semaphore in FPGA or software |
| IDT71322SA35PF8 | 2K × 8 organization, identical 35 ns timing, same package and pinout, includes semaphore logic | Half memory depth; suitable for compact control buffers where full 4K not required | Choose for footprint-compatible migration where reduced capacity suffices and BOM consolidation is prioritized |
Compared with CY7C024AV-35AXC and IDT71322SA35PF8, the IDT71342SA35PF8 uniquely delivers 4K × 8 density with on-die semaphore logic in a 64-pin TQFP, enabling drop-in replacement for legacy IDT71342 designs while avoiding external arbitration components or software overhead.
Availability
IDT71342SA35PF8 is available at Aetrix Electronics and suitable for motor control co-processor interfaces, real-time data acquisition buffers, and distributed PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for IDT71342SA35PF8 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
Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, and RF power solutions for high-performance computing and industrial systems.
The IDT71342 product line was designed specifically for deterministic interprocessor communication in real-time embedded systems, emphasizing hardware-accelerated resource arbitration and low-latency dual-port memory access.
FAQ
What is the maximum operating frequency supported by IDT71342SA35PF8?
IDT71342SA35PF8 does not operate on a clock signal-it is fully asynchronous. Its performance is defined by timing parameters: maximum read cycle time tRC is 35 ns, implying a theoretical upper bound of ~28.6 MHz for repetitive read cycles. Actual system throughput depends on address setup, enable assertion, and output hold timing per the AC Electrical Characteristics table.
Does IDT71342SA35PF8 support battery backup for data retention?
No. IDT71342SA35PF8 is the SA (standard power) variant and lacks battery backup capability. Only the LA variant (e.g., IDT71342LA35PF8) supports 2 V data retention with typical ICCDR = 100 µA. The SA version requires continuous 5 V supply to maintain memory contents.
How are the semaphore flags accessed in IDT71342SA35PF8?
Semaphore flags are accessed by asserting SEM = VIL (active low) while holding CE = VIH. Address lines A0–A2 select one of eight flags; only I/O0 is used for writing (0 = request token, 1 = release), and all I/O0–I/O7 reflect the flag state (00h = token held, FFh = free) during reads with OE active.
Can both ports of IDT71342SA35PF8 perform simultaneous writes to the same memory location?
No. Simultaneous writes to the same non-semaphore memory address result in undefined data and are prohibited per the Functional Description. The device provides no internal resolution-system design must prevent such conflicts using semaphores or external arbitration. Concurrent writes to different addresses are fully supported.
What is the meaning of "SA" in IDT71342SA35PF8?
"SA" denotes the Standard Power variant of the IDT71342 family. It specifies typical active current ICC = 150 mA (both ports active, fMAX), versus the LA (Low Power) variant with battery backup and lower standby current. The "35" indicates 35 ns maximum read cycle time, and "PF8" identifies the 64-pin TQFP package.
71342SA35PF8 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:
- 32Kbit
- Memory Organization:
- 4K 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:
- 64-TQFP (14x14)
71342SA35PF8 FAQ
1.How can I place an order for 71342SA35PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342SA35PF8 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 71342SA35PF8 reliable?
The price and inventory of 71342SA35PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342SA35PF8 is usually 5 days.
3.What payment methods are accepted for 71342SA35PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342SA35PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342SA35PF8?
71342SA35PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342SA35PF8 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 71342SA35PF8?
For technical support, including 71342SA35PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342SA35PF8 requirements.
6.How does Aetrix verify that 71342SA35PF8 is sourced from the original manufacturer or authorized distributors?
All 71342SA35PF8 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 71342SA35PF8 meets industry standards.
7.What is the process for return or replacement of 71342SA35PF8?
All 71342SA35PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342SA35PF8, 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 71342SA35PF8 part is unused and in its original packaging.
Return procedure for 71342SA35PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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