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Renesas 71342LA35J
- Part No.:
- 71342LA35J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
71342LA35J.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,074
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Product details
Overview
IDT71342LA35J 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 access from left and right ports, provides battery-backed data retention down to 2 V, and is used in real-time interprocessor communication systems requiring concurrent memory access without software arbitration.
For engineers reviewing the IDT71342LA35J datasheet, IDT71342LA35J pinout, IDT71342LA35J application, or IDT71342LA35J equivalent, key selection criteria include dual-port timing isolation, hardware semaphore flag contention resolution, 2 V data retention capability, and PLCC-52/TQFP-64 package compatibility in industrial embedded control designs.
Technical Context
The IDT71342LA35J implements two independent CMOS SRAM ports sharing a single 4K × 8 memory array, with separate address, data, and control lines per port. Semaphore logic resides in a dedicated 8-location address space (A0–A2 only), accessed via SEM pin assertion and isolated from main memory addressing.
Each port features TTL-compatible inputs, active-low chip enables (CEL/CER), output enables (OEL/OER), and read/write controls (R/WL/R/WR). Power management includes four standby modes (ISB1–ISB4) triggered by CE/SEM voltage thresholds and input logic levels, enabling sub-1 mA full-standby current at 2 V for battery backup operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (4096 words × 8-bit data bus per port) |
| Max Read Cycle Time | 35 ns - defines minimum time between consecutive reads on same port |
| Supply Voltage | 5.0 V ±10% - requires single-rail 4.5–5.5 V supply; no dual-voltage support |
| Data Retention Voltage | 2.0 V - enables battery backup operation with ≤1.5 mA retention current |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Standby Current (ISB3) | 4.0 µA typ. - ultra-low power mode with CMOS-level inputs and SEM/CE > VCC – 0.2 V |
| Access Type | Fully asynchronous - no clock required; timing governed solely by tAA, tACE, tAOE |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), body size 20.0 mm × 20.0 mm × 4.3 mm, lead pitch 1.27 mm. Pin 1 marked by corner notch; pins 1–26 and 52–27 arranged counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access (0–4095) |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access (0–4095) |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; high-impedance when OEL = VIH or CEL = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; high-impedance when OER = VIH or CER = VIH |
| CEL / CER | Left/right chip enable | Active-low enables memory access; deassertion places port in standby |
| OEL / OER | Left/right output enable | Active-low enables data output drivers; overrides R/WL/R/WR for tri-state control |
| R/WL / R/WR | Left/right read/write control | Active-low write; high = read (no separate write enable) |
| SEML / SEMR | Left/right semaphore enable | Active-low selects semaphore register space (A0–A2 only); disables main memory access |
| VCC | Power supply | 5 V ±10% supply; all VCC pins must be connected and decoupled |
| GND | Ground reference | Common return for all signals; all GND pins must be connected |
Key Features
| Feature | Design Value |
|---|---|
| Hardware semaphore arbitration | Eight independent binary flags with automatic contention resolution and token-passing logic |
| Battery backup retention | 2 V minimum VCC for data hold; ≤1.5 mA ISB4 current enables long-term backup from coin cell |
| Dual-port timing isolation | No performance degradation on one port due to activity on the other; tAA/tRC independent per port |
| Four-tier standby power control | ISB1–ISB4 modes scale current from 25 mA to 4 µA based on CE/SEM logic levels and input types |
| TTL-compatible interface | VIH = 2.2 V min., VIL = 0.8 V max. - interoperable with legacy 5 V logic families without level shifters |
Applications
| Industrial Motion Controller | Avionics Data Concentrator |
|---|---|
|
Use Scenario: Real-time coordination between FPGA-based motion sequencer and ARM host processor sharing trajectory buffers and status registers. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency shared memory with hardware semaphore for resource locking during axis synchronization. Use Value: Eliminates software polling delays; 35 ns access ensures <100 ns interprocessor handshaking latency under worst-case timing. |
Use Scenario: ARINC 429 bus interface module aggregating sensor data from multiple line-replaceable units (LRUs) into a central flight management system. IC Role / Device Role / Timing Role: Memory buffer with semaphore-controlled write access prevents data corruption during concurrent LRU updates and FMS reads. Use Value: Prevents bus arbitration wait states; 2 V data retention maintains critical fault logs during 5 V power interruption. |
| Medical Imaging Pipeline | Telecom Baseband Processor |
|
Use Scenario: High-throughput image frame buffering between ASIC-based pixel processing engine and DSP-based post-processing unit. IC Role / Device Role / Timing Role: Concurrent read/write memory with independent port timing isolates pipeline stages from timing jitter. Use Value: Enables continuous 120 fps acquisition without frame drops; ISB3 mode reduces idle power to 4 µA between frames. |
Use Scenario: Shared memory between baseband modem and protocol stack processor in LTE small-cell radio unit. IC Role / Device Role / Timing Role: Semaphore-managed buffer for MAC layer control messages and PHY layer IQ sample exchange. Use Value: Guarantees atomic flag updates across clock domains; resolves simultaneous request contention 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 |
|---|---|---|---|
| CY7C1354V25 | 4K × 16 organization, 25 ns access, 3.3 V core (5 V I/O tolerant), no battery retention | Requires level translation for 5 V systems; lacks 2 V data hold for backup | Choose for higher bandwidth (16-bit bus) and lower active power in 3.3 V designs where battery backup is unnecessary |
| AS7C34098B | 4K × 8, 25 ns, 5 V, no integrated semaphore logic; external arbitration required | Needs discrete logic or FPGA-based semaphore implementation | Choose when cost sensitivity outweighs design time savings; accept added PCB area and firmware complexity |
Compared with CY7C1354V25 and AS7C34098B, the IDT71342LA35J uniquely combines 5 V operation, industrial temperature rating, hardware semaphore, and 2 V battery retention in a single PLCC-52 package-enabling drop-in replacement only in systems requiring all four attributes simultaneously.
Availability
IDT71342LA35J is available at Aetrix Electronics and suitable for industrial motion controllers, avionics data concentrators, and medical imaging pipelines requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA35J 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, specialized in high-performance timing, memory, and interface ICs for communications, computing, and industrial markets.
The IDT71342LA35J belongs to IDT's dual-port SRAM family designed specifically for deterministic interprocessor communication in real-time embedded systems where software arbitration introduces unacceptable latency.
FAQ
What is the maximum guaranteed read cycle time for IDT71342LA35J?
The IDT71342LA35J guarantees a maximum read cycle time (tRC) of 35 ns over the full industrial temperature range (–40°C to +85°C) and 5 V ±10% supply. This value is production-tested and applies to both left and right ports independently under worst-case conditions specified in Table 9a of the datasheet.
Does IDT71342LA35J support true battery backup operation?
Yes, the IDT71342LA35J supports true battery backup: it retains valid data at VCC = 2.0 V minimum with ICCDR ≤ 1.5 mA typical. This is exclusive to LA-grade devices and verified per Table 7; SA variants do not offer this capability.
How does semaphore contention resolution work in IDT71342LA35J?
IDT71342LA35J resolves simultaneous semaphore requests via dedicated hardware that guarantees only one port receives the token-even if requests arrive within the 10 ns tSPS window. The first valid request wins; ties are arbitrated deterministically, not randomly, ensuring repeatable system behavior.
Which package options are available for IDT71342LA35J?
IDT71342LA35J is offered in two RoHS-compliant packages: 52-pin PLCC (PLG52) and 64-pin TQFP (PNG64). The "J" suffix in the part number denotes the PLCC-52 variant; TQFP versions use different suffixes (e.g., "P"). Pinouts differ significantly between packages and are not interchangeable.
Can IDT71342LA35J operate with mixed voltage interfaces?
No, IDT71342LA35J requires a single 5 V ±10% supply (4.5–5.5 V) for all I/O and core functions. It is TTL-compatible but not mixed-voltage capable-inputs expect VIH ≥ 2.2 V and VIL ≤ 0.8 V referenced to the same VCC rail; no 3.3 V or 2.5 V interface support is provided.
71342LA35J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 52-PLCC (19.13x19.13)
71342LA35J FAQ
1.How can I place an order for 71342LA35J through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA35J 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 71342LA35J reliable?
The price and inventory of 71342LA35J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA35J is usually 5 days.
3.What payment methods are accepted for 71342LA35J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA35J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA35J?
71342LA35J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA35J 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 71342LA35J?
For technical support, including 71342LA35J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA35J requirements.
6.How does Aetrix verify that 71342LA35J is sourced from the original manufacturer or authorized distributors?
All 71342LA35J 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 71342LA35J meets industry standards.
7.What is the process for return or replacement of 71342LA35J?
All 71342LA35J units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA35J, 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 71342LA35J part is unused and in its original packaging.
Return procedure for 71342LA35J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA35J Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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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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AT24C08C-STUM-T
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