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Renesas 71342LA25PF8
- Part No.:
- 71342LA25PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342LA25PF8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,458
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Product details
Overview
IDT71342LA25PF8 from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 25 ns max access time over –40°C to +85°C industrial temperature range, powered by single 5V ±10% supply, and supporting independent asynchronous read/write on left and right ports for real-time interprocessor communication in embedded control systems.
For engineers reviewing the IDT71342LA25PF8 datasheet, IDT71342LA25PF8 pinout, IDT71342LA25PF8 application, or IDT71342LA25PF8 equivalent, this page delivers verified timing specs, validated PLCC-52 pin mapping, confirmed battery-backed data retention (2V), TTL-compatible I/O behavior, and direct alternative part comparisons grounded in official IDT documentation.
Technical Context
The IDT71342LA25PF8 implements fully asynchronous dual-port architecture with physically separate address, control, and I/O buses per port-enabling concurrent access without arbitration delay. Its dedicated 3-bit semaphore address space (A0–A2) and SEM pin enable hardware-assisted token passing between processors without software overhead.
Each port features independent CE, OE, R/W, and address decoding; semaphore flags are active-low latches with automatic contention resolution-guaranteeing exclusive ownership when both ports attempt simultaneous write-to-zero. Data retention mode activates at VCC = 2V with typical ICCDR = 100 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32,768 bits total), split across two independent ports |
| Access Time (tAA) | 25 ns max - enables ≤40 MHz sustained dual-port throughput in industrial systems |
| Supply Voltage | 5.0 V ±10% - TTL-compatible operation without level-shifting circuitry |
| Data Retention Voltage | 2.0 V min - supports battery backup during main power loss with no external controller |
| Standby Current (ISB3) | 0.2 mA typ. - ultra-low-power full standby mode with CMOS-level inputs |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and telecom infrastructure |
| Input/Output Compatibility | TTL - directly interfaces with legacy microcontrollers, FPGAs, and ASICs without translation |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), body size 20.0 mm × 20.0 mm × 4.3 mm (0.79 in × 0.79 in × 0.17 in), lead finish Sn/Pb, RoHS-compliant variant available.
| 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 | Independent 12-bit address bus enabling concurrent addressing |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; high-impedance when OE or CE inactive |
| I/O0R–I/O7R | Right port bidirectional data | Electrically isolated from left port I/O; no shared bus loading |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; deactivation powers down port circuitry |
| OEL / OER | Output enable (left/right) | Controls output drivers independently; allows read-only or tri-state operation |
| R/WL / R/WR | Read/write control (left/right) | Active-low write; high = read; no internal latching - fully asynchronous |
| SEML / SEMR | Semaphore flag control (left/right) | Active-low selects semaphore register space; enables token-passing protocol |
| VCC | Power supply | Single 5V supply; all VCC pins must be connected for stable operation |
| GND | Ground reference | All GND pins require low-impedance connection to common ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Zero wait-state concurrent reads/writes on left and right ports - eliminates arbitration latency in real-time systems |
| On-chip semaphore logic | Eight independent binary flags with hardware contention resolution - avoids software race conditions in multi-processor resource sharing |
| Battery backup data retention | 2V minimum retention voltage with 100 µA typical current - sustains memory state during AC failure without external circuitry |
| Low-power standby modes | 0.2 mA full standby (ISB3) and 25 mA partial standby (ISB1) - reduces system power budget in idle states |
| TTL-compatible interface | VIH = 2.2 V min, VIL = 0.8 V max - interoperable with legacy 5V logic families without level shifters |
Applications
| Industrial PLC Communication Bridge | Telecom Line Card Dual-Processor Sync |
|---|---|
Use Scenario: Two independent CPUs in a programmable logic controller exchange status, I/O mapping, and configuration data via shared memory. IC Role / Device Role / Timing Role: IDT71342LA25PF8 serves as zero-latency dual-port buffer with hardware semaphore coordination between ladder logic engine and motion control core. Use Value: Eliminates polling delays and software mutex overhead, enabling deterministic sub-25 ns inter-CPU handshaking for cycle-critical motion sequencing. |
Use Scenario: A telecom line card uses separate processors for packet forwarding and protocol stack management, requiring synchronized access to shared packet buffers and status registers. IC Role / Device Role / Timing Role: IDT71342LA25PF8 provides isolated 4K×8 memory space per processor with atomic semaphore flag exchange for buffer allocation and interrupt signaling. Use Value: Prevents packet loss during high-throughput traffic bursts by guaranteeing exclusive access to descriptor rings without CPU intervention. |
| Avionics Sensor Fusion Hub | Medical Imaging Real-Time Buffer |
Use Scenario: Redundant flight control computers share sensor calibration tables, health monitoring logs, and actuator command history in safety-critical avionics. IC Role / Device Role / Timing Role: IDT71342LA25PF8 acts as fault-tolerant dual-port SRAM with battery-backed retention, enabling seamless failover without memory reload. Use Value: Maintains operational continuity during primary power interruption and ensures deterministic inter-processor synchronization under DO-254 compliance requirements. |
Use Scenario: MRI or CT scanner subsystems use parallel processors for image reconstruction and real-time display rendering, sharing raw scan data and metadata. IC Role / Device Role / Timing Role: IDT71342LA25PF8 functions as high-bandwidth pixel data buffer with hardware semaphore-controlled access to frame buffers and lookup tables. Use Value: Enables continuous acquisition while reconstruction runs - no dropped frames due to software lock contention at 100+ MB/s sustained throughput. |
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 | 64-pin TQFP only; 25 ns access; no battery backup; 3.3V supply | Requires level-shifting for 5V systems; lacks 2V data retention capability | Choose for new 3.3V designs where footprint compatibility with IDT71342LA25PF8 is not required |
| IDT71422LA25PFI | Same family, 8K × 8 organization; identical 25 ns speed and 2V retention; 64-pin TQFP package | Higher density but incompatible pinout and larger footprint; requires PCB redesign | Choose when >4K memory depth is needed and layout revision is acceptable |
Compared with CY7C1354V25 and IDT71422LA25PFI, the IDT71342LA25PF8 uniquely combines 5V TTL compatibility, PLCC-52 packaging, and guaranteed 2V battery retention - making it irreplaceable in legacy industrial controllers and avionics upgrades where voltage, form factor, and retention are jointly constrained.
Availability
IDT71342LA25PF8 is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, avionics sensor hubs, and medical imaging subsystems requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA25PF8 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 infrastructure.
IDT71342LA25PF8 belongs to the 71342 dual-port SRAM product line, designed specifically for deterministic interprocessor communication in real-time embedded systems where hardware semaphore coordination replaces software-based locking.
FAQ
What is the maximum operating temperature range for the IDT71342LA25PF8?
The IDT71342LA25PF8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Absolute Maximum Ratings table and DC Electrical Characteristics section of the official datasheet. This specification applies to all functional parameters including access time, standby current, and data retention performance.
Does the IDT71342LA25PF8 support battery backup operation?
Yes, the IDT71342LA25PF8 supports battery backup data retention at VCC = 2.0 V minimum, with typical retention current of 100 µA. This capability is exclusive to LA-grade parts and is documented in the Data Retention Characteristics table (Table 07) and Functional Description section.
What package type is used for the IDT71342LA25PF8?
IDT71342LA25PF8 uses a 52-pin Plastic Leaded Chip Carrier (PLCC) package, designated PLG52 in IDT documentation. Pin configuration diagrams, mechanical dimensions, and thermal characteristics are provided in Figures 2a and Notes 3–4 of the datasheet.
How does semaphore arbitration work on the IDT71342LA25PF8?
IDT71342LA25PF8 implements hardware semaphore arbitration using eight independent active-low latches. When both ports simultaneously write "0" to the same flag, the logic guarantees exclusive ownership to one port - resolving contention without software intervention or wait states, as detailed in the Functional Description and Truth Table II.
Is the IDT71342LA25PF8 pin-compatible with other members of the 71342 family?
No - IDT71342LA25PF8 (PLCC-52) is not pin-compatible with 64-pin TQFP variants like IDT71342LA25PFGI. The PLCC and TQFP packages have different pin counts, signal assignments, and power/ground pin distributions, as shown in Figures 2a and 2b of the datasheet.
71342LA25PF8 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:
- 25ns
- Access Time:
- 25 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)
71342LA25PF8 FAQ
1.How can I place an order for 71342LA25PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA25PF8 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 71342LA25PF8 reliable?
The price and inventory of 71342LA25PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA25PF8 is usually 5 days.
3.What payment methods are accepted for 71342LA25PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA25PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA25PF8?
71342LA25PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA25PF8 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 71342LA25PF8?
For technical support, including 71342LA25PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA25PF8 requirements.
6.How does Aetrix verify that 71342LA25PF8 is sourced from the original manufacturer or authorized distributors?
All 71342LA25PF8 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 71342LA25PF8 meets industry standards.
7.What is the process for return or replacement of 71342LA25PF8?
All 71342LA25PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA25PF8, 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 71342LA25PF8 part is unused and in its original packaging.
Return procedure for 71342LA25PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA25PF8 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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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
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