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Renesas 71342SA35PF
- Part No.:
- 71342SA35PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342SA35PF.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,187
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Product details
Overview
IDT71342SA35PF 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 access from left and right ports and enables interprocessor resource arbitration in real-time embedded control systems.
For engineers reviewing the IDT71342SA35PF datasheet, IDT71342SA35PF pinout, IDT71342SA35PF application, or IDT71342SA35PF equivalent, this device delivers deterministic port-to-port timing, hardware semaphore contention resolution, battery-backed data retention readiness (LA variant), and TTL-compatible I/O for legacy bus interfacing in multiprocessor architectures.
Technical Context
The IDT71342SA35PF implements two fully independent CMOS SRAM ports sharing a single 4K × 8 memory array and eight dedicated semaphore latches accessed via A0–A2 under SEM = VIL. Each port has separate CE, OE, R/W, and address lines, enabling concurrent read/write operations without arbitration delay.
Semaphore logic uses dual request latches per flag with priority resolution: simultaneous zero-write requests guarantee exclusive token assignment to one port, while write-to-1 releases ownership. Power-down is controlled independently per port via CE and SEM high states, achieving 1.0 mA full-standby current (ISB3) at 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32,768 bits total), dual-port architecture with separate left/right I/O and control |
| Access Time (tAA) | 35 ns max - defines minimum address hold before valid data appears on outputs |
| Read Cycle Time (tRC) | 35 ns max - sets minimum interval between successive read operations on same port |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL buses; no level-shifting required |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control and telecom infrastructure |
| Standby Current (ISB3) | 1.0 mA max - achieved when both CE and SEM are high and inputs held at CMOS levels |
| Semaphore Address Space | A0–A2 only - eight dedicated flags mapped to addresses 0–7; other address pins ignored during semaphore access |
Pinout & Package
Package: 52-pin PLCC (PLG52), body size ≈ 20.0 mm × 20.0 mm × 4.3 mm, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access; A0–A2 used exclusively for semaphore addressing when SEM = VIL |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access; independent of left port timing and state |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; high-impedance when OE = VIH or CE = VIH; D0 used for semaphore write |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; outputs latched during semaphore reads to prevent mid-cycle flag changes |
| CEL / CER | Left/right chip enable | Active-low enables respective port; high state places port into standby mode (ISB1/ISB2) |
| OEL / OER | Left/right output enable | Active-low controls output drivers; high disables outputs, allowing bus sharing |
| R/WL / R/WR | Left/right write enable | Active-low initiates write cycles; must overlap with CE low for valid SRAM writes |
| SEML / SEMR | Semaphore select (active-low) | When low, enables semaphore address space; CE must be high to access semaphores |
| VCC | Power supply | Single 5 V ±10% supply; all VCC pins must be connected and decoupled locally |
| GND | Ground reference | All GND pins must be connected to system ground plane for signal integrity and EMI control |
Key Features
| Feature | Design Value |
|---|---|
| Hardware semaphore arbitration | Eight dedicated binary flags with automatic contention resolution-no software polling or wait states required |
| Full port independence | Simultaneous read/write on left and right ports with no timing coupling; tRC applies per port, not globally |
| Low-power standby modes | Four distinct standby currents (ISB1–ISB4) selectable by CE/SEM input levels and signal types (TTL/CMOS) |
| TTL-compatible I/O | VIH = 2.2 V min, VIL = 0.8 V max - interoperable with legacy 5 V microcontrollers and FPGAs without level shifters |
| Dual-package availability | Also offered in 64-pin TQFP (PNG64); PLCC variant enables through-hole prototyping and high-reliability mounting |
Applications
| Industrial Motion Control | Telecom Line Card Buffering |
|---|---|
Use Scenario: Dual-CPU PLC executing real-time motion trajectory generation and I/O monitoring simultaneously. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore coordination between motion engine and safety monitor CPUs. Use Value: Eliminates software mutex overhead, guarantees sub-35 ns inter-CPU data exchange, and prevents race conditions during emergency stop handling. |
Use Scenario: High-density line card in carrier-grade DSLAM requiring packet buffering between upstream/downstream processors. IC Role / Device Role / Timing Role: Asynchronous data pipe with independent read/write ports servicing ATM cell assembly and disassembly engines. Use Value: Enables zero-wait-state packet forwarding at OC-3 line rates; semaphore flags coordinate buffer allocation without CPU intervention. |
| Avionics Data Concentrator | Medical Imaging Subsystem |
Use Scenario: ARINC 664 (AFDX) end system aggregating sensor data from multiple LRUs into a central flight management unit. IC Role / Device Role / Timing Role: Deterministic shared memory for time-triggered message passing between safety-critical partitions. Use Value: Meets DO-254 Level A timing constraints; 35 ns tRC ensures worst-case latency compliance across partition boundaries. |
Use Scenario: MRI subsystem where FPGA-based image reconstruction engine shares raw k-space data with ARM-based UI processor. IC Role / Device Role / Timing Role: High-bandwidth, low-latency memory bridge supporting concurrent acquisition and display update pipelines. Use Value: Sustains >200 MB/s aggregate throughput; hardware semaphores prevent frame corruption during real-time DICOM export. |
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 |
|---|---|---|---|
| CY7C1352V-35AC | 35 ns access, 4K × 8, but uses separate semaphore enable pin (SEMEN) instead of shared SEM pin; requires external pull-up for default disable | Lacks integrated power-down control per port; ISB3 = 5 mA vs. IDT71342SA35PF's 1.0 mA | Prefer IDT71342SA35PF for lower standby power and simpler semaphore interface in battery-sensitive or thermally constrained designs. |
| AS7C34098B-35JC | 35 ns access, 4K × 8, but no on-chip semaphore logic; requires external arbitration logic or software-only locking | No hardware contention resolution; introduces indeterminate latency during semaphore acquisition | Choose IDT71342SA35PF when deterministic interprocessor synchronization is mandatory and software overhead must be minimized. |
Compared with CY7C1352V-35AC and AS7C34098B-35JC, the IDT71342SA35PF provides superior power efficiency in standby modes, eliminates external semaphore support components, and guarantees atomic token assignment-critical for safety-certified and real-time deterministic systems.
Availability
IDT71342SA35PF is available at Aetrix Electronics and suitable for industrial motion control, telecom line card buffering, avionics data concentrators, and medical imaging subsystems requiring stable component supply across extended product lifecycles.
Supply support for IDT71342SA35PF 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 communications.
The IDT71342 product line was designed specifically for deterministic multiprocessor systems requiring hardware-accelerated resource arbitration and low-latency shared memory-targeting industrial automation, aerospace, and telecom infrastructure.
FAQ
What is the maximum guaranteed read cycle time for IDT71342SA35PF?
The IDT71342SA35PF has a maximum read cycle time (tRC) of 35 ns across the full industrial temperature range (–40°C to +85°C) and supply voltage (4.5 V to 5.5 V). This value is production-tested and guaranteed per datasheet Table 9a, ensuring deterministic timing for real-time system design.
How does semaphore arbitration work in IDT71342SA35PF when both ports attempt to claim the same flag simultaneously?
IDT71342SA35PF resolves simultaneous semaphore requests using dedicated hardware logic that guarantees exclusive token assignment to exactly one port-even if requests arrive within the same nanosecond. The winning port sees a zero on subsequent read; the losing port reads a one, eliminating software race conditions without wait states.
Can IDT71342SA35PF operate with only one port active while the other remains in ultra-low-power standby?
Yes. IDT71342SA35PF supports asymmetric standby: setting CEL = VIH and SEM = VIH disables the left port to ISB1 = 25 mA (TTL) or ISB3 = 1.0 mA (CMOS), while the right port remains fully operational. This enables dynamic power scaling in multi-CPU systems with variable workload distribution.
What package type is used for IDT71342SA35PF, and is it RoHS-compliant?
IDT71342SA35PF is supplied in a 52-pin PLCC (PLG52) package with dimensions approximately 20.0 mm × 20.0 mm × 4.3 mm. It is lead-free and RoHS-compliant per IDT's 2019 product documentation, meeting JEDEC J-STD-020 moisture sensitivity level 3 requirements.
Does IDT71342SA35PF support battery backup for data retention like the LA variant?
No. IDT71342SA35PF is the SA (standard power) variant and does not include battery backup capability. Data retention at 2 V is specified only for LA versions (e.g., IDT71342LA35PF). The SA variant requires continuous 5 V supply to maintain memory contents.
71342SA35PF 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:
- 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)
71342SA35PF FAQ
1.How can I place an order for 71342SA35PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342SA35PF 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 71342SA35PF reliable?
The price and inventory of 71342SA35PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342SA35PF is usually 5 days.
3.What payment methods are accepted for 71342SA35PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342SA35PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342SA35PF?
71342SA35PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342SA35PF 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 71342SA35PF?
For technical support, including 71342SA35PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342SA35PF requirements.
6.How does Aetrix verify that 71342SA35PF is sourced from the original manufacturer or authorized distributors?
All 71342SA35PF 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 71342SA35PF meets industry standards.
7.What is the process for return or replacement of 71342SA35PF?
All 71342SA35PF units undergo pre-shipment inspection (PSI). If there is an issue with 71342SA35PF, 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 71342SA35PF part is unused and in its original packaging.
Return procedure for 71342SA35PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342SA35PF Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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