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Renesas 71342LA55PFI
- Part No.:
- 71342LA55PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342LA55PFI.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,897
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Product details
Overview
IDT71342LA55PFI from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 55 ns max read cycle time, supporting independent asynchronous access from left and right ports, and featuring 2 V data retention in battery backup mode. It is used in real-time interprocessor communication systems requiring concurrent memory access without software arbitration.
For engineers reviewing the IDT71342LA55PFI datasheet, IDT71342LA55PFI pinout, IDT71342LA55PFI application, or IDT71342LA55PFI equivalent, key selection criteria include dual-port timing isolation, hardware semaphore flag contention resolution, 55 ns SRAM access latency, and industrial temperature support (–40°C to +85°C) with 5 V ±10% supply.
Technical Context
The IDT71342LA55PFI implements fully asynchronous dual-port operation: each port has dedicated address (A0L–A11L / A0R–A11R), data (I/O0L–I/O7L / I/O0R–I/O7R), and control lines (CEL/CER, OEL/OER, R/WL/R/WR). Semaphore logic resides in a separate 8-location address space (A0–A2 only) accessed via SEM pin low, with flags active-low and write-locked per side after zero-write.
It uses CMOS process technology to achieve 700 mW typical active power and 1 mW typical standby power. Battery backup mode enables 2 V data retention with ≤1500 µA ICCDR, verified under VCC = 2 V, TA = +25°C. The device supports TTL-compatible signaling and requires no external arbitration logic for interprocessor synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4K × 8 bits (4096 words × 8-bit wide), split across two independent ports |
| Access Time | 55 ns max tRC - defines minimum cycle time for reliable read operations on either port |
| Supply Voltage | 5.0 V ±10% - single-rail TTL-compatible operation; no level-shifting required |
| Operating Temp | –40°C to +85°C - qualified for industrial environments without derating |
| Data Retention | 2 V min VDR - enables battery-backed operation during main power loss |
| Standby Current | 1 mW typ (1 µA @ 5 V) - ultra-low ISB3 full-standby mode with CMOS-level inputs |
| Semaphore Count | 8 independent binary flags - each accessible via A0–A2, controlled by SEM pin assertion |
Pinout & Package
Package: 64-pin TQFP (PNG64), 14 mm × 14 mm × 1.4 mm body, 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; no effect on semaphore space |
| 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; high-impedance when OEL = VIH or CEL = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; isolated from left port; no bus contention risk |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; controls power-down entry when high |
| OEL / OER | Output enable (left/right) | Active-low enables output drivers; overrides R/W state for read-only control |
| R/WL / R/WR | Read/write control (left/right) | Active-low write; high = read; determines direction when CE and OE are asserted |
| SEM | Semaphore select | Active-low enables semaphore address space (A0–A2); disables SRAM access when asserted |
| SEML / SEMR | Semaphore flag status outputs | Open-drain, active-low outputs indicating current token ownership per side |
| VCC / GND | Power / ground | All VCC pins must be connected; all GND pins tied to common ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port architecture | Enables simultaneous, independent reads/writes from left and right ports without timing coupling or arbitration delay |
| Hardware semaphore logic block | Eight dedicated, write-locked binary flags resolve interprocessor contention deterministically-no software polling or wait states required |
| Battery backup data retention | Operates down to 2 V with ≤1500 µA retention current, preserving contents during main power interruption |
| Ultra-low standby power | 1 mW typical (ISB3) with CMOS-level inputs held at rail extremes-ideal for power-gated subsystems |
| TTL-compatible interface | Direct connection to 5 V microcontrollers and FPGAs without level translation or external pull-ups |
Applications
| Industrial PLC Dual-CPU Coordination | Avionics Data Crossfeed Buffer |
|---|---|
Use Scenario: Two independent CPUs in a safety-critical programmable logic controller share I/O mapping tables and configuration registers. IC Role / Device Role / Timing Role: IDT71342LA55PFI serves as shared memory with hardware semaphore arbitration, enabling lock-free resource allocation between control and monitoring cores. Use Value: Eliminates software mutex overhead and guarantees deterministic <55 ns inter-core memory access, meeting IEC 61508 SIL-3 timing constraints. | Use Scenario: Flight management system (FMS) and auto-flight computer exchange sensor fusion results and navigation waypoints in real time. IC Role / Device Role / Timing Role: IDT71342LA55PFI acts as a dual-access buffer with atomic semaphore handshaking, ensuring coherent data transfer without CPU stalls. Use Value: Prevents race conditions during concurrent read/write of GPS/INS data packets, maintaining ARINC 653 partition timing integrity. |
| Medical Imaging Real-Time Pipeline | Test Equipment Pattern Memory |
Use Scenario: MRI signal processor and reconstruction engine concurrently access raw k-space data and calibration coefficients. IC Role / Device Role / Timing Role: IDT71342LA55PFI provides synchronized dual-port SRAM storage with hardware-enforced mutual exclusion on critical buffers. Use Value: Sustains >100 MB/s sustained bandwidth across both ports while guaranteeing atomic flag updates for pipeline stage coordination. | Use Scenario: Automated test equipment stores stimulus patterns and expected response vectors for parallel DUT evaluation. IC Role / Device Role / Timing Role: IDT71342LA55PFI functions as a pattern memory with semaphore-controlled access between pattern generator and comparator engines. Use Value: Enables sub-microsecond inter-engine synchronization, reducing test cycle time by eliminating software handshake latency. |
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 |
|---|---|---|---|
| CY7C1355BV33-55AXI | 3.3 V core, 55 ns access, 4K × 16 organization, no integrated semaphore logic | Requires external arbitration logic or FPGA-based semaphore emulation | Select when migrating to 3.3 V systems and implementing custom semaphore control in programmable logic |
| IDT71344LA55PFI | Same family, 8K × 8 organization, identical 55 ns timing and semaphore architecture | Provides double memory depth; pinout differs due to additional address pins (A12L/A12R) | Select when higher capacity is needed without changing timing or interface behavior-requires PCB layout revision |
Compared with CY7C1355BV33-55AXI, IDT71342LA55PFI delivers integrated hardware semaphores and 5 V compatibility, eliminating external logic; compared with IDT71344LA55PFI, it offers lower cost and footprint for 4K applications where extra depth is unnecessary.
Availability
IDT71342LA55PFI is available at Aetrix Electronics and suitable for industrial PLCs, avionics crossfeed systems, and medical imaging pipelines requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA55PFI 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.
IDT71342LA55PFI belongs to the IDT7134x dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems requiring hardware-synchronized shared memory.
FAQ
What is the maximum guaranteed access time for IDT71342LA55PFI?
IDT71342LA55PFI guarantees a maximum read cycle time (tRC) of 55 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 under worst-case voltage and temperature conditions specified in the datasheet.
Does IDT71342LA55PFI support true simultaneous read/write between ports?
Yes - IDT71342LA55PFI supports fully asynchronous, independent read and write operations on left and right ports. However, simultaneous write-to-same-address is not supported and may cause undefined data; the semaphore logic prevents such conflicts in shared-resource coordination but does not protect against concurrent writes to SRAM locations.
How does the semaphore logic in IDT71342LA55PFI resolve simultaneous flag requests?
IDT71342LA55PFI's semaphore logic guarantees deterministic resolution: if both ports attempt to write zero to the same flag simultaneously, exactly one port wins the token based on internal propagation delay asymmetry. No arbitration delay or software intervention is required - the winning side reads zero; the losing side reads one, confirming failure.
Can IDT71342LA55PFI retain data at 2 V while powered from 5 V?
No - IDT71342LA55PFI enters data retention mode only when VCC drops to ≤2 V. During normal 5 V operation, retention is irrelevant; the 2 V specification defines the minimum voltage at which stored data remains valid when main power fails and a backup battery takes over.
Is IDT71342LA55PFI pin-compatible with other speed grades in the 71342LA family?
No - IDT71342LA55PFI (55 ns) shares the same 64-pin TQFP package and pinout with IDT71342LA25PFI (25 ns) and IDT71342LA35PFI (35 ns), but not with PLCC-packaged variants like IDT71342LA55PF. Speed grade changes do not affect pin assignment, but thermal and signal integrity margins differ.
71342LA55PFI 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:
- 55ns
- Access Time:
- 55 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)
71342LA55PFI FAQ
1.How can I place an order for 71342LA55PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA55PFI 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 71342LA55PFI reliable?
The price and inventory of 71342LA55PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA55PFI is usually 5 days.
3.What payment methods are accepted for 71342LA55PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA55PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA55PFI?
71342LA55PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA55PFI 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 71342LA55PFI?
For technical support, including 71342LA55PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA55PFI requirements.
6.How does Aetrix verify that 71342LA55PFI is sourced from the original manufacturer or authorized distributors?
All 71342LA55PFI 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 71342LA55PFI meets industry standards.
7.What is the process for return or replacement of 71342LA55PFI?
All 71342LA55PFI units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA55PFI, 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 71342LA55PFI part is unused and in its original packaging.
Return procedure for 71342LA55PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA55PFI Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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