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Renesas 71342LA25PFGI
- Part No.:
- 71342LA25PFGI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-TQFP
- Datasheet:
-
71342LA25PFGI.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:258
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Product details
Overview
IDT71342LA25PFGI 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, consuming 700 mW active and 1 mW standby power, and supporting independent asynchronous read/write on left/right ports for real-time interprocessor communication in embedded control systems.
For engineers reviewing the IDT71342LA25PFGI datasheet, IDT71342LA25PFGI pinout, IDT71342LA25PFGI application, or IDT71342LA25PFGI equivalent, this device delivers deterministic port-to-port arbitration via hardware semaphores, battery-backed 2 V data retention, TTL-compatible 5 V ±10% operation, and dual 52-pin PLCC / 64-pin TQFP packaging - critical for deterministic shared-memory designs in motion control, telecom line cards, and industrial PLCs.
Technical Context
The IDT71342LA25PFGI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port (A0L–A11L/I/O0L–I/O7L/R/WL/CEL/OEL/SEML and A0R–A11R/I/O0R–I/O7R/R/WR/CER/OER/SEMR), enabling concurrent memory access without cycle interference. Its dedicated 3-bit semaphore address space (A0–A2) and SEM pin enable/disable logic isolate flag operations from main RAM space.
Semaphore latches are active-low, write-locked per port: writing '0' to a flag grants exclusive token ownership to that port until '1' is written; reads return broadcast values across all 8 I/O pins. Power-down is controlled independently per port via CE and SEM high states, achieving 1 mW typical standby with CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (4096 words × 8-bit wide), two independent addressable spaces |
| Access Time (tAA) | 25 ns max - guarantees deterministic response for 40 MHz real-time control loops |
| Operating Voltage | 5.0 V ±10% - compatible with legacy TTL and 5 V microcontroller buses |
| Temperature Range | –40°C to +85°C - qualified for industrial automation and base station environments |
| Active Power (ICC) | 170 mA typ. (850 mW at 5 V) - enables thermal management in dense PCB layouts |
| Data Retention | 2.0 V min supply - supports battery backup during main power loss without external circuitry |
| Standby Current (ISB3) | 0.2 mA typ. - allows ultra-low-power sleep modes in always-on edge devices |
Pinout & Package
Package: 64-pin TQFP (PNG64), 14 mm × 14 mm × 1.4 mm body, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for 4K-word left-side access; no effect on right port or semaphore |
| A0R–A11R | Right port address inputs | 12-bit address bus for 4K-word right-side access; electrically isolated from left port |
| 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 |
| R/WL, R/WR | Left/right write-enable controls | Active-low; determines direction of data transfer on respective port |
| CEL, CER | Left/right chip enable | Active-low; disables port logic and reduces current to ISB1/ISB2 levels |
| OEL, OER | Left/right output enable | Active-low; enables I/O drivers only; does not affect internal memory state |
| SEML, SEMR | Left/right semaphore enable | Active-low; selects semaphore register space (A0–A2 only); disables RAM access when asserted |
| VCC, GND | Power and ground | All VCC pins must be decoupled locally; all GND pins tied to common plane |
Key Features
| Feature | Design Value |
|---|---|
| Hardware semaphore logic | Eight independent binary flags with per-port write lockout and broadcast read - eliminates software polling overhead in multi-CPU systems |
| Asynchronous dual-port operation | Zero-cycle port arbitration - left and right ports operate concurrently with no timing dependency or wait-state insertion |
| Battery backup data retention | 2 V minimum VCC support with 100 µA typical retention current - sustains memory state during AC failure without supercapacitor or backup regulator |
| Low-power standby modes | Four ISB modes (ISB1–ISB4) down to 0.2 mA - enables selective port shutdown in asymmetric workload scenarios |
| TTL-compatible interface | VIH = 2.2 V min, VIL = 0.8 V max - interoperates directly with 5 V MCUs, FPGAs, and ASICs without level shifters |
Applications
| Industrial Motion Control | Telecom Line Card Buffering |
|---|---|
Use Scenario: Coordinating servo axis synchronization between FPGA-based motion controller and ARM host processor via shared trajectory buffers. IC Role / Device Role / Timing Role: Dual-port SRAM provides zero-latency, conflict-free memory exchange; semaphore flags arbitrate buffer ownership without CPU intervention. Use Value: Eliminates 2–3 µs software handshake delays per axis update, enabling sub-microsecond jitter in closed-loop position control. |
Use Scenario: Storing packet header metadata and status flags between network processor and DSP on a 10Gbps line card. IC Role / Device Role / Timing Role: Left port serves network processor writes; right port serves DSP reads; semaphores signal packet readiness and completion. Use Value: Sustains 40+ Mpacket/s throughput by avoiding bus contention stalls and eliminating DMA descriptor queuing latency. |
| Programmable Logic Controller (PLC) | Avionics Data Acquisition |
Use Scenario: Sharing I/O mapping tables and alarm logs between safety-certified ARM Cortex-R5 and non-certified Linux application core. IC Role / Device Role / Timing Role: Hardware semaphore enforces strict mutual exclusion on critical sections; RAM retains state across warm reboots. Use Value: Meets IEC 61508 SIL-3 requirements for deterministic inter-core communication without runtime OS dependencies. |
Use Scenario: Capturing sensor fusion data from inertial measurement unit (IMU) and GPS receiver in flight control computer. IC Role / Device Role / Timing Role: Left port accepts burst ADC samples at 1 MHz; right port streams processed telemetry to ARINC-429 interface; 2 V retention preserves last valid state during brownout. Use Value: Guarantees continuity of flight-critical data across 100 ms power interruptions, satisfying DO-160 Section 20 Category A requirements. |
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 |
|---|---|---|---|
| CY7C1342BV25-10BGXI | 10 ns faster access (15 ns), 3.3 V only, no battery retention, 100-pin TQFP | Requires level-shifting for 5 V systems; unsuitable for brownout-safe retention | Select when system uses 3.3 V logic and demands <20 ns latency; verify PCB footprint compatibility |
| AS7C34098B-25JCIN | No integrated semaphore logic; requires external arbitration logic or software protocol | Increases firmware complexity and CPU load; adds board area for discrete logic | Select only if semaphore usage is minimal and design prioritizes lowest cost over deterministic latency |
Compared with CY7C1342BV25-10BGXI and AS7C34098B-25JCIN, the IDT71342LA25PFGI uniquely combines industrial-temperature 25 ns access, 5 V TTL compatibility, and hardware semaphore logic in a 64-pin footprint - making it the only drop-in solution for legacy 5 V multi-processor systems requiring guaranteed retention and lock-free inter-core signaling.
Availability
IDT71342LA25PFGI is available at Aetrix Electronics and suitable for industrial motion control, telecom line card buffering, programmable logic controller (PLC), and avionics data acquisition requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA25PFGI 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 IDT71342 family was engineered specifically for deterministic, low-latency interprocessor communication in real-time embedded systems - emphasizing hardware-accelerated semaphore arbitration, battery-backed reliability, and seamless 5 V system integration.
FAQ
What is the maximum operating temperature range certified for IDT71342LA25PFGI?
IDT71342LA25PFGI is rated for industrial temperature operation from –40°C to +85°C, validated across all electrical parameters including 25 ns access time, 1 mW standby current, and 2 V data retention. This range is explicitly confirmed in the Absolute Maximum Ratings and DC Electrical Characteristics tables of the official IDT71342LA datasheet revision DSC 2621/16.
Does IDT71342LA25PFGI support true simultaneous read/write between ports?
Yes, IDT71342LA25PFGI supports fully asynchronous, truly simultaneous read and write operations on left and right ports - provided accesses target different memory locations. The functional block diagram and Truth Table I confirm independent control paths, and timing waveforms show no inter-port delay penalties for non-conflicting operations.
How does the semaphore logic prevent race conditions when both ports request the same flag?
IDT71342LA25PFGI's semaphore logic guarantees atomic flag assignment: if both ports write '0' simultaneously to the same semaphore, the hardware resolves contention by granting the token to exactly one port - either based on nanosecond-scale timing skew or arbitrary arbitration. This behavior is documented in the "Critical case of semaphore timing" section and Truth Table II of the datasheet.
Can IDT71342LA25PFGI retain data at 2 V while powered solely by a backup battery?
Yes, IDT71342LA25PFGI supports battery backup data retention at VCC = 2.0 V minimum, drawing only 100 µA typical (1500 µA max) in retention mode. This capability is exclusive to LA-grade parts and verified in the Data Retention Characteristics table (Symbol VDR and ICCDR) under commercial and industrial temperature conditions.
What package options are available for IDT71342LA25PFGI, and which is used in the PFGI suffix?
IDT71342LA25PFGI uses the 64-pin TQFP package (PNG64), as indicated by the 'PFGI' suffix per IDT's naming convention. The datasheet confirms PNG64 dimensions (14 mm × 14 mm × 1.4 mm) and pinout, distinct from the 52-pin PLCC (PLG52) option used in other variants like IDT71342LA25JGI.
71342LA25PFGI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-TQFP
- Packaging:
- Tray
- 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:
- 64-TQFP (14x14)
71342LA25PFGI FAQ
1.How can I place an order for 71342LA25PFGI through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA25PFGI 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 71342LA25PFGI reliable?
The price and inventory of 71342LA25PFGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA25PFGI is usually 5 days.
3.What payment methods are accepted for 71342LA25PFGI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA25PFGI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA25PFGI?
71342LA25PFGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA25PFGI 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 71342LA25PFGI?
For technical support, including 71342LA25PFGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA25PFGI requirements.
6.How does Aetrix verify that 71342LA25PFGI is sourced from the original manufacturer or authorized distributors?
All 71342LA25PFGI 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 71342LA25PFGI meets industry standards.
7.What is the process for return or replacement of 71342LA25PFGI?
All 71342LA25PFGI units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA25PFGI, 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 71342LA25PFGI part is unused and in its original packaging.
Return procedure for 71342LA25PFGI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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