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Renesas 71342LA25JGI8
- Part No.:
- 71342LA25JGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
71342LA25JGI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,111
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Product details
Overview
IDT71342LA25JGI8 from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with integrated hardware semaphore logic, operating at 25 ns (max) access time over –40°C to +85°C industrial temperature range, supporting independent asynchronous read/write on left and right ports, and enabling interprocessor resource arbitration in real-time embedded control systems.
For engineers reviewing the IDT71342LA25JGI8 datasheet, IDT71342LA25JGI8 pinout, IDT71342LA25JGI8 application, or IDT71342LA25JGI8 equivalent, this device delivers deterministic port-to-port timing, battery-backed data retention down to 2V, TTL-compatible 5V ±10% operation, and full on-chip semaphore flag management - critical for lock-free multi-processor memory sharing in avionics, industrial PLCs, and telecom line cards.
Technical Context
The IDT71342LA25JGI8 implements two fully independent asynchronous SRAM ports sharing a single 4K × 8 memory array, with dedicated 3-bit address space (A0–A2) for eight binary semaphore latches accessed via SEM pin assertion. Each port features separate CE, OE, R/W, and address buses, eliminating bus contention during concurrent access.
Semaphore logic operates as a pair of request latches per flag, resolving simultaneous write attempts deterministically: the first valid zero-write wins, while the losing side's request remains pending until the winning side writes a one to release the flag - ensuring atomic token acquisition without software polling overhead or wait states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4K × 8 bits (32,768 bits), organized as two independent 4K × 8 ports |
| Access Time | 25 ns max (industrial grade), enabling 40 MHz sustained dual-port throughput |
| Supply Voltage | 5.0 V ±10%, TTL-compatible interface with no level-shifting required |
| Data Retention | 2.0 V minimum VCC, supporting battery backup with ≤1500 µA retention current |
| Operating Temperature | –40°C to +85°C, qualified for industrial control and ruggedized communications equipment |
| Power Consumption | 700 mW typical active, 1 mW typical standby (both ports disabled) |
| Semaphore Count | 8 independent binary flags, each accessible via A0–A2 with SEM = VIL |
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 |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable for respective port; both HIGH places port in ultra-low-power standby (ISB3 ≤ 0.2 mA) |
| OEL / OER | Output Enable (Left / Right) | Controls I/O drivers; deassertion forces high-impedance state within 15 ns (tHZ) |
| R/WL / R/WR | Read/Write Control (Left / Right) | Defines direction: LOW = write, HIGH = read; must be stable during address transitions |
| A0L–A11L / A0R–A11R | Address Inputs (Left / Right) | 12-bit address bus per port; A0–A2 used for semaphore addressing when SEM = VIL |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (Left / Right) | Bidirectional 8-bit data bus; D0 only used for semaphore write, all bits reflect flag state on read |
| SEML / SEMR | Semaphore Flag Outputs | Active-low open-drain outputs indicating flag ownership status per port |
| SEM | Semaphore Select | Active-low chip select for semaphore register space; must be VIL to access A0–A2 semaphore addresses |
| VCC / GND | Power Supply | All VCC pins must be connected to 5V ±10%; all GND pins tied to common ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port architecture | Enables concurrent, independent read/write operations on left and right ports with no arbitration delay or cycle penalty |
| Hardware semaphore logic block | Eight dedicated binary flags with deterministic conflict resolution - eliminates software spinlocks and guarantees atomic token acquisition |
| Battery backup data retention | Operates down to 2.0 V VCC with ≤1500 µA retention current, preserving memory contents during main power loss |
| TTL-compatible 5V interface | Direct connection to legacy microcontrollers and FPGAs without level shifters or external biasing |
| Ultra-low standby power | 1 mW typical (ISB3) when both ports disabled via CE and SEM HIGH, reducing system idle power in always-on equipment |
Applications
| Industrial PLC Memory Coherency | Avionics Dual-Processor Data Exchange |
|---|---|
Use Scenario: Two independent CPUs share sensor data buffers and control command queues in a safety-critical programmable logic controller. IC Role / Device Role / Timing Role: IDT71342LA25JGI8 serves as shared memory with hardware-enforced mutual exclusion via semaphore flags, ensuring deterministic response under worst-case interrupt latency. Use Value: Eliminates software-based polling loops and reduces inter-CPU synchronization overhead by >90%, enabling sub-10 µs resource handoff between ladder logic and motion control engines. |
Use Scenario: Flight management computer (FMC) and autopilot controller exchange navigation waypoints and flight plan updates in real time. IC Role / Device Role / Timing Role: IDT71342LA25JGI8 provides dual-port SRAM with guaranteed 25 ns port-to-port write-read delay (tDDD = 30 ns), supporting lock-free data transfer without CPU stalling. Use Value: Enables deterministic 40 MHz dual-port bandwidth and 2V data retention during transient brownouts - meeting DO-254 Level A hardware assurance requirements. |
| Telecom Line Card Buffering | Medical Imaging Real-Time Frame Store |
Use Scenario: High-speed packet processor and network interface controller share packet descriptors and metadata in a 10G Ethernet line card. IC Role / Device Role / Timing Role: IDT71342LA25JGI8 acts as low-latency descriptor ring buffer with hardware semaphore coordination, preventing descriptor corruption during concurrent DMA and CPU access. Use Value: Sustains 40 Mwords/s aggregate throughput with zero-cycle arbitration, reducing packet drop rate by 3 orders of magnitude versus software-mutex implementations. |
Use Scenario: MRI subsystem uses two processors: one acquires raw k-space data, the other performs real-time FFT reconstruction. IC Role / Device Role / Timing Role: IDT71342LA25JGI8 functions as dual-port frame buffer with battery-backed retention, allowing seamless acquisition continuation during brief power interruptions. Use Value: Guarantees uninterrupted 25 ns memory access for 16-bit pixel streams at 120 MB/s, while retaining critical calibration tables at 2V during AC mains failure. |
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, 3.3V core (requires level translation for 5V systems) | Larger word width suits wider bus architectures but lacks native 5V TTL compatibility | Choose when migrating to 3.3V systems or requiring 16-bit data path; not drop-in for 5V TTL designs. |
| AS7C34098A-25JC | 4K × 8, 25 ns, no integrated semaphore logic - requires external arbitration logic or software protocol | Lower cost but increases PCB area and firmware complexity for interprocessor sync | Prefer only if semaphore functionality is implemented externally or unnecessary for the application. |
Compared with CY7C1354V25 and AS7C34098A-25JC, the IDT71342LA25JGI8 uniquely combines 5V TTL compatibility, on-die semaphore arbitration, and industrial temperature support in a single 52-pin PLCC package - eliminating level shifters, external logic, and qualification risk in legacy-reliant systems.
Availability
IDT71342LA25JGI8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data concentrators, and telecom line cards requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA25JGI8 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 high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
IDT71342LA25JGI8 belongs to IDT's legacy dual-port SRAM family designed specifically for deterministic, low-latency interprocessor communication in real-time embedded systems where hardware arbitration replaces software mutexes.
FAQ
What is the maximum operating temperature range for IDT71342LA25JGI8?
IDT71342LA25JGI8 is rated for industrial temperature operation from –40°C to +85°C, verified per manufacturer specifications and qualified for use in harsh environments such as factory automation controllers and outdoor telecom base stations. This range applies to all electrical parameters including 25 ns access time and 2V data retention capability.
Does IDT71342LA25JGI8 support battery backup operation?
Yes, IDT71342LA25JGI8 supports battery backup with guaranteed data retention at VCC ≥ 2.0 V, consuming ≤1500 µA in retention mode. This feature is exclusive to LA-grade devices and enables nonvolatile memory preservation during main power loss - critical for medical and aerospace applications requiring state recovery after interruption.
How many semaphore flags does IDT71342LA25JGI8 provide, and how are they accessed?
IDT71342LA25JGI8 provides eight independent binary semaphore flags, accessed exclusively via A0–A2 address lines when SEM = VIL. Only I/O0 is used for writing; all eight I/O lines reflect the flag state on read. Each flag supports atomic set-and-test sequences with deterministic conflict resolution between left and right ports.
What package type is used for IDT71342LA25JGI8?
IDT71342LA25JGI8 is packaged in a 52-pin PLCC (PLG52) with dimensions 20.0 mm × 20.0 mm × 4.3 mm. This surface-mount package features gull-wing leads compatible with standard reflow profiles and is RoHS-compliant. Pinout matches the functional diagram in the official IDT datasheet DSC2621/16.
Can both ports of IDT71342LA25JGI8 perform simultaneous read/write operations?
Yes, IDT71342LA25JGI8 supports fully asynchronous concurrent access: one port may read while the other writes, or both may read/write independently - provided they target different memory locations. Simultaneous write to the same address is undefined; semaphore logic prevents conflicts only in the dedicated 8-flag space, not main memory.
71342LA25JGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
71342LA25JGI8 FAQ
1.How can I place an order for 71342LA25JGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA25JGI8 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 71342LA25JGI8 reliable?
The price and inventory of 71342LA25JGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA25JGI8 is usually 5 days.
3.What payment methods are accepted for 71342LA25JGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA25JGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA25JGI8?
71342LA25JGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA25JGI8 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 71342LA25JGI8?
For technical support, including 71342LA25JGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA25JGI8 requirements.
6.How does Aetrix verify that 71342LA25JGI8 is sourced from the original manufacturer or authorized distributors?
All 71342LA25JGI8 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 71342LA25JGI8 meets industry standards.
7.What is the process for return or replacement of 71342LA25JGI8?
All 71342LA25JGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA25JGI8, 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 71342LA25JGI8 part is unused and in its original packaging.
Return procedure for 71342LA25JGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA25JGI8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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