My Inquiry
My Account
Renesas 71342LA35PF
- Part No.:
- 71342LA35PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342LA35PF.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,389
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IDT71342LA35PF from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 35 ns max access time, supporting independent asynchronous read/write on left and right ports, and enabling interprocessor resource arbitration in real-time embedded systems such as industrial motion controllers and telecom line cards.
For engineers reviewing the IDT71342LA35PF datasheet, IDT71342LA35PF pinout, IDT71342LA35PF application, or IDT71342LA35PF equivalent, this page delivers verified specifications, industrial-temperature operation (–40°C to +85°C), battery-backed data retention at 2 V, TTL-compatible 5 V ±10% supply, and full hardware semaphore signaling - all critical for deterministic multi-CPU memory sharing designs.
Technical Context
The IDT71342LA35PF implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, allowing concurrent access without arbitration delay. Its dedicated 3-bit address space (A0–A2) selects among eight independent semaphore latches, each accessible only when SEM = VIL and CE = VIH.
Semaphore flags operate active-low with write-to-zero token request and write-to-one release; reads return latched flag state across all eight I/O lines. Power management uses CE and SEM to gate port-level circuitry into low-power standby modes, achieving 1 µA typical standby current with CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32 Kbit total), split into two independent 4K × 8 ports |
| Access Time (tAA) | 35 ns max - defines minimum time between address valid and valid data output |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single-supply operation with no level-shifting required |
| Data Retention Voltage | 2.0 V min - enables battery backup operation with guaranteed data hold during main power loss |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and base station equipment |
| Standby Current (ISB3) | 4.0 µA typ. - ultra-low power consumption when both ports disabled with CMOS-level inputs |
| Output Drive | 6 mA sink / –4 mA source - sufficient for direct interface to standard TTL loads without buffers |
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 (4K = 2¹²) |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access, fully independent of left port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; direction controlled by R/WL and OEL |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; direction controlled by R/WR and OER |
| CEL, CER | Chip enable (left/right) | Active-low enables respective port; deassertion places port in standby |
| OEL, OER | Output enable (left/right) | Active-low enables data outputs; high-Z when disabled |
| R/WL, R/WR | Read/write control (left/right) | Active-low = write; high = read - determines I/O direction per port |
| SEML, SEMR | Semaphore enable (left/right) | Active-low selects semaphore register space instead of RAM; enables token arbitration |
| VCC, GND | Power and ground | All VCC pins must be connected to 5 V ±10%; all GND pins tied to common ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Enables simultaneous, independent read/write on left and right ports with zero wait states |
| On-chip hardware semaphore logic | Eight dedicated binary flags with atomic set/test behavior prevent race conditions in multi-processor systems |
| Battery backup data retention | Maintains stored data at 2 V supply - supports seamless failover in power-interrupted applications |
| Ultra-low standby power | 1 µA typical ISB3 current allows extended battery life in always-on industrial monitoring nodes |
| TTL-compatible interface | Direct connection to legacy 5 V microcontrollers and FPGAs without level translation circuitry |
Applications
| Industrial Motion Controller | Telecom Line Card |
|---|---|
Use Scenario: Two DSPs coordinate motor trajectory generation and real-time feedback processing using shared buffer memory. IC Role / Device Role / Timing Role: Dual-port RAM serves as synchronized data exchange hub; semaphores arbitrate access to position command tables and encoder history buffers. Use Value: Eliminates software polling delays; guarantees sub-35 ns memory access latency for closed-loop servo cycles. |
Use Scenario: Line card hosts host processor and packet forwarding ASIC sharing configuration tables and statistics buffers. IC Role / Device Role / Timing Role: IDT71342LA35PF provides non-blocking memory access; semaphore flags coordinate updates to routing table entries without stalling either processor. Use Value: Prevents packet loss during dynamic reconfiguration; maintains line-rate throughput under concurrent read/write load. |
| Medical Imaging Subsystem | Avionics Data Recorder |
Use Scenario: FPGA-acquired image frames are written while ARM-based UI processor reads prior frames for display. IC Role / Device Role / Timing Role: Left port connects to FPGA DMA engine; right port interfaces to ARM bus; semaphores signal frame readiness and buffer availability. Use Value: Enables continuous 30 fps acquisition and display with zero dropped frames due to memory contention. |
Use Scenario: Flight data recorder stores sensor telemetry via safety-critical microcontroller while maintenance interface reads logs over serial link. IC Role / Device Role / Timing Role: IDT71342LA35PF acts as fault-tolerant buffer; battery-backed retention preserves last 10 minutes of data after main power failure. Use Value: Meets DO-178C data integrity requirements; ensures crash data recovery even after complete aircraft power loss. |
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 | 32K × 16 organization, 35 ns access, 3.3 V supply only | Requires level shifters for 5 V systems; larger memory but no battery retention | Choose if migrating to 3.3 V architecture and needing higher density |
| IDT71322LA35PF | 2K × 8 organization, same 35 ns speed, identical 52-pin PLCC package and pinout | Half memory depth; suitable for cost-sensitive designs with smaller shared buffer needs | Select when footprint compatibility is mandatory and 2K × 8 capacity suffices |
Compared with CY7C024AV-35AXC and IDT71322LA35PF, the IDT71342LA35PF uniquely combines industrial-temperature 5 V operation, 2 V battery retention, and full semaphore support in a 4K × 8 configuration - making it irreplaceable for legacy 5 V multi-processor systems requiring fail-safe data persistence.
Availability
IDT71342LA35PF is available at Aetrix Electronics and suitable for industrial motion control, telecom infrastructure, and avionics data recording requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA35PF 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 solutions for high-performance computing and communications.
The IDT71342 family was designed specifically for deterministic interprocessor communication in real-time embedded systems, delivering hardware-accelerated memory sharing without software overhead or bus arbitration latency.
FAQ
What is the maximum access time specification for IDT71342LA35PF?
The IDT71342LA35PF has a maximum read access time (tAA) of 35 ns under industrial temperature conditions (–40°C to +85°C) and 5.0 V ±10% supply. This value is guaranteed across the full operating range and applies to both left and right ports independently, enabling predictable timing in hard real-time applications.
Does IDT71342LA35PF support battery backup operation?
Yes, the IDT71342LA35PF supports battery backup data retention at 2.0 V minimum supply voltage, with typical retention current of 100 µA. This feature is exclusive to the LA variant and allows the device to maintain stored data during main power interruption - critical for flight recorders and medical devices.
How many semaphore flags does IDT71342LA35PF provide, and how are they accessed?
The IDT71342LA35PF provides eight independent binary semaphore flags, accessed via A0–A2 address lines when SEM = VIL and CE = VIH. Each flag is active-low: writing '0' requests the token, writing '1' releases it. Reads return the latched flag state across all eight I/O lines simultaneously.
What is the operating temperature range of IDT71342LA35PF?
The IDT71342LA35PF is rated for industrial temperature operation from –40°C to +85°C. This qualification ensures reliable performance in demanding environments such as factory automation controllers, outdoor telecom cabinets, and vehicle-mounted computing systems.
Is IDT71342LA35PF pin-compatible with other members of the IDT71342 family?
Yes, the IDT71342LA35PF shares identical 52-pin PLCC (PLG52) pinout with all IDT71342X35 variants, including IDT71342SA35PF and IDT71342LA35PFI. Differences are limited to internal power optimization (LA vs SA) and temperature grade (commercial vs industrial), allowing drop-in replacement where thermal and power specs align.
71342LA35PF 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)
71342LA35PF FAQ
1.How can I place an order for 71342LA35PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA35PF 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 71342LA35PF reliable?
The price and inventory of 71342LA35PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA35PF is usually 5 days.
3.What payment methods are accepted for 71342LA35PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA35PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA35PF?
71342LA35PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA35PF 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 71342LA35PF?
For technical support, including 71342LA35PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA35PF requirements.
6.How does Aetrix verify that 71342LA35PF is sourced from the original manufacturer or authorized distributors?
All 71342LA35PF 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 71342LA35PF meets industry standards.
7.What is the process for return or replacement of 71342LA35PF?
All 71342LA35PF units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA35PF, 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 71342LA35PF part is unused and in its original packaging.
Return procedure for 71342LA35PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA35PF Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
