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Renesas 71342LA35PF8
- Part No.:
- 71342LA35PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342LA35PF8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,577
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Product details
Overview
IDT71342LA35PF8 from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with integrated hardware semaphore logic, operating at 35 ns max read cycle time, supporting independent asynchronous access from left and right ports, and enabling interprocessor resource arbitration in real-time embedded systems such as industrial motion controllers and telecom packet buffers.
For engineers reviewing the IDT71342LA35PF8 datasheet, IDT71342LA35PF8 pinout, IDT71342LA35PF8 application, or IDT71342LA35PF8 equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), 5V ±10% single-supply operation, battery-backed data retention (2V), TTL compatibility, and full on-chip semaphore flag arbitration without external logic.
Technical Context
The IDT71342LA35PF8 implements two fully independent asynchronous memory ports sharing a 4K × 8 SRAM array plus eight dedicated semaphore latches accessed via A0–A2 under SEM = VIL control. Each port has separate CE, OE, R/W, and address lines, eliminating bus contention during concurrent reads/writes.
Semaphore logic uses active-low flags with automatic contention resolution: simultaneous write requests to the same flag guarantee exclusive ownership to one port, and flag state is latched per-port during reads to prevent mid-cycle corruption. Power management includes four standby modes (ISB1–ISB4) triggered by CE/SEM voltage thresholds and input logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32,768 bits total), split across two independent ports |
| Access Time (tRC) | 35 ns max - defines minimum clock period for reliable read cycles in high-throughput systems |
| Supply Voltage | 5.0 V ±10% - compatible with legacy TTL and 5V microcontroller buses without level shifting |
| Data Retention | 2.0 V min - enables battery backup operation with typical 100 µA retention current at +25°C |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and base station applications |
| Standby Current (ISB3) | 4.0 µA typ. - ultra-low power full-standby mode when both CE and SEM exceed VCC − 0.2 V |
| Input/Output Compatibility | TTL - ensures direct interfacing with 5V FPGA I/O banks, microcontrollers, and ASICs |
Pinout & Package
Package: 64-pin TQFP (PNG64), body size 14 mm × 14 mm × 1.4 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; A10L/A11L used only for RAM addressing (not semaphore) |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access; independent timing from left port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit parallel data path; high-impedance when OE = VIH or CE = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit parallel data path; electrically isolated from left port I/O lines |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; deassertion places port in low-power standby (ISB1–ISB4) |
| OEL / OER | Output enable (left/right) | Active-low controls output drivers; allows read-only access without disabling chip select |
| R/WL / R/WR | Read/write control (left/right) | Active-low write; high = read; determines direction of data flow on I/O pins |
| SEML / SEMR | Semaphore enable (left/right) | Active-low selects semaphore register space (A0–A2 only); disables RAM access when asserted |
| VCC | Power supply | Single 5V ±10% supply; all VCC pins must be connected to decoupled 5V rail |
| GND | Ground | Common reference; all GND pins must be connected to low-impedance ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port architecture | Enables concurrent read/write operations from left and right ports without arbitration delay or wait states |
| On-chip hardware semaphore logic | Eight independent binary flags with automatic contention resolution and per-port latch protection during reads |
| Battery-backed data retention | Operates down to 2.0 V with <1500 µA max retention current - supports nonvolatile storage during main power loss |
| Four-tier standby power management | ISB1–ISB4 modes scale current from 25 mA (TTL-level standby) to 4.0 µA (CMOS-level full standby) |
| Industrial temperature qualification | Guaranteed functionality across –40°C to +85°C ambient - suitable for factory automation and outdoor telecom equipment |
Applications
| Industrial Motion Controller | Telecom Packet Buffer |
|---|---|
Use Scenario: Real-time coordination between FPGA-based trajectory planner and MCU-based motor driver in CNC systems. IC Role / Device Role / Timing Role: Dual-port RAM serves as shared command/status buffer; semaphore flags arbitrate access to motion profile tables. Use Value: Eliminates software polling delays - 35 ns access enables sub-microsecond interprocessor handshaking for jitter-free servo updates. |
Use Scenario: Storing incoming/outgoing Ethernet frames in a network switch ASIC subsystem. IC Role / Device Role / Timing Role: Left port accepts ingress packets from MAC; right port feeds egress scheduler; semaphores coordinate frame ownership. Use Value: Prevents frame corruption during concurrent read/write - hardware arbitration avoids 100+ ns software lock overhead in 1 Gbps line-rate buffering. |
| Medical Imaging Data Pipeline | Avionics Display Processor |
Use Scenario: Transferring reconstructed CT scan slices from DSP accelerator to display controller. IC Role / Device Role / Timing Role: Acts as zero-wait-state frame buffer; semaphore flags signal slice readiness and buffer availability. Use Value: Sustains 120 MB/s sustained throughput (8-bit × 35 ns) without DMA stalls - critical for real-time diagnostic visualization. |
Use Scenario: Sharing flight instrument data between safety-critical ARM Cortex-R5 and graphics rendering GPU. IC Role / Device Role / Timing Role: Provides deterministic memory coherency; semaphores enforce strict read-before-write ordering for attitude data. Use Value: Meets DO-254 Level A timing assurance - hardware semaphore guarantees atomic flag transitions within 10 ns window (tSPS). |
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 |
|---|---|---|---|
| CY7C1355KV18-35BGXI | 18-bit bus width, 2.5V core + 3.3V I/O, no battery retention | Targets high-bandwidth DSP interfaces; lacks 2V data retention for backup operation | Choose when wider data path and lower voltage operation outweigh retention needs |
| AS7C34098B-35JCIN | 4K × 8 organization, 35 ns speed, no integrated semaphore logic | Requires external arbitration logic (e.g., CPLD) for interprocessor sync | Choose when system already implements semaphore in FPGA or cost sensitivity overrides integration benefit |
Compared with CY7C1355KV18-35BGXI and AS7C34098B-35JCIN, the IDT71342LA35PF8 uniquely combines industrial temperature range, 2V battery retention, and fully autonomous hardware semaphore arbitration in a 5V TTL-compatible 64-pin TQFP - eliminating external logic while maintaining deterministic latency for safety-critical embedded control.
Availability
IDT71342LA35PF8 is available at Aetrix Electronics and suitable for industrial motion control, telecom infrastructure, medical imaging, and avionics applications requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA35PF8 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The IDT71342LA35PF8 belongs to IDT's dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems where hardware arbitration eliminates software-induced latency and race conditions.
FAQ
What is the maximum guaranteed access time for IDT71342LA35PF8?
IDT71342LA35PF8 has a maximum read cycle time (tRC) of 35 ns over the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply. This value is production-tested and guaranteed - not a typical or characterization-only figure - ensuring timing compliance in worst-case thermal and voltage conditions.
Does IDT71342LA35PF8 support battery backup operation?
Yes, IDT71342LA35PF8 supports battery backup with guaranteed data retention down to 2.0 V (VDR), consuming ≤1500 µA typical at +25°C. This capability is exclusive to LA-grade devices and enables nonvolatile storage during main power interruption - critical for industrial black-box logging and avionics fault recording.
How does semaphore arbitration work in IDT71342LA35PF8 when both ports request simultaneously?
IDT71342LA35PF8 guarantees exclusive semaphore ownership even during simultaneous write requests: its hardware logic resolves contention within 10 ns (tSPS), assigning the flag to exactly one port. If timing skew is zero, assignment is deterministic but arbitrary - never resulting in deadlock or undefined state.
What package type is used for IDT71342LA35PF8?
IDT71342LA35PF8 is supplied in a 64-pin TQFP (PNG64) package measuring 14 mm × 14 mm × 1.4 mm. This RoHS-compliant, lead-free package provides superior thermal dissipation and board-level reliability compared to PLCC variants, and is optimized for automated SMT assembly in high-volume production.
Can IDT71342LA35PF8 operate with mixed-voltage systems?
No - IDT71342LA35PF8 requires a single 5.0 V ±10% supply (4.5 V to 5.5 V) and is TTL-compatible. It does not support mixed-voltage I/O or level-shifting; interfacing with 3.3V or 1.8V logic requires external translators. All control, address, and data signals are referenced to this single VCC rail.
71342LA35PF8 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)
71342LA35PF8 FAQ
1.How can I place an order for 71342LA35PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA35PF8 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 71342LA35PF8 reliable?
The price and inventory of 71342LA35PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA35PF8 is usually 5 days.
3.What payment methods are accepted for 71342LA35PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA35PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA35PF8?
71342LA35PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA35PF8 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 71342LA35PF8?
For technical support, including 71342LA35PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA35PF8 requirements.
6.How does Aetrix verify that 71342LA35PF8 is sourced from the original manufacturer or authorized distributors?
All 71342LA35PF8 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 71342LA35PF8 meets industry standards.
7.What is the process for return or replacement of 71342LA35PF8?
All 71342LA35PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA35PF8, 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 71342LA35PF8 part is unused and in its original packaging.
Return procedure for 71342LA35PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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