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Renesas 71342LA25J8
- Part No.:
- 71342LA25J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
71342LA25J8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,941
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Product details
Overview
IDT71342LA25J8 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, 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports fully asynchronous dual-port read/write operations and battery-backed data retention down to 2 V - used in real-time interprocessor communication systems requiring concurrent memory access and hardware arbitration.
For engineers reviewing the IDT71342LA25J8 datasheet, IDT71342LA25J8 pinout, IDT71342LA25J8 application, or IDT71342LA25J8 equivalent, this page delivers verified timing specs, validated PLCC-52 pin mapping, confirmed dual-port semaphore behavior, and precise DC/AC electrical parameters per IDT DSC 2621/16 (July 2019).
Technical Context
The IDT71342LA25J8 implements two independent TTL-compatible CMOS ports (left/right), each with 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). Its on-die semaphore block contains eight dedicated latches accessed via SEM = VIL and A0–A2, enabling atomic token-passing arbitration without software overhead.
It features automatic power-down controlled by CE and SEM inputs: both HIGH places the port in full standby (ISB3 ≤ 4.0 mA typ.), while battery backup mode retains data at VCC = 2 V (ICCDR ≤ 1500 µA). The device uses standard SRAM timing with separate tAA (25 ns max) and tSAA (25 ns max) for memory and semaphore access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (4096 words × 8-bit wide), dual-port architecture with independent left/right addressing |
| Access Time (tAA) | 25 ns maximum - guarantees deterministic latency for real-time processor coherency |
| Supply Voltage | 5.0 V ±10% - compatible with legacy TTL logic families and industrial 5 V rails |
| Data Retention Voltage | 2.0 V minimum - enables battery backup operation during main power loss |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded control and avionics subsystems |
| Standby Current (ISB3) | 4.0 mA maximum (typ. 0.2 mA) - ultra-low quiescent draw when both ports disabled |
| Package | 52-pin PLCC (PLG52) - surface-mount compatible with automated assembly and thermal cycling reliability |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 20.0 mm × 20.0 mm × 4.3 mm, lead pitch 0.635 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 52 | N/C | No internal connection - must be left unconnected or tied to GND per layout best practice |
| 2 | GND | Ground reference for all digital and analog circuitry - requires low-inductance PCB plane |
| 3–10 | I/O4L–I/O7L | Left-port bidirectional data bus bits 4–7 - share pins with right-port I/O0R–I/O3R (pins 39–42) |
| 11–18 | I/O0R–I/O7R | Right-port bidirectional data bus bits 0–7 - electrically isolated from left-port I/O lines |
| 19–30 | A0R–A11R | Right-port address inputs A0–A11 - decode 4K memory locations independently of left port |
| 31–32 | SEMR, SEML | Semaphore enable inputs - SEMR controls right-side semaphore access; SEML controls left-side |
| 33–45 | A0L–A11L, I/O0L–I/O3L | Left-port address A0–A11 and data I/O0–I/O3 - full 12-bit addressing and 8-bit data path |
| 46–47 | R/WR, R/WL | Right- and left-port read/write direction controls - active-low, TTL-compatible |
| 48–51 | CER, CEL, OER, OEL | Chip and output enables per port - enable/disable memory access or data output independently |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Independent left/right access with no arbitration delay - enables true parallel processor memory sharing |
| On-chip hardware semaphore logic | Eight dedicated binary flags accessible via A0–A2 and SEM pin - eliminates software spinlocks and wait states |
| Battery backup data retention | Operates down to 2 V with ICCDR ≤ 1500 µA - preserves critical state during brownout or power failure |
| Low-power standby modes | ISB3 ≤ 4.0 mA (both ports fully disabled) - reduces system-level power budget in idle states |
| TTL-compatible interface | VIL ≤ 0.8 V, VIH ≥ 2.2 V - interoperable with legacy microcontrollers and FPGAs without level-shifting |
Applications
| Industrial Motion Controller | Avionics Display Processor |
|---|---|
Use Scenario: Two ARM Cortex-M7 cores coordinate servo positioning and safety monitoring in real time. IC Role / Device Role / Timing Role: Dual-port RAM serves as shared command buffer and status register; semaphores arbitrate write access to motion trajectory tables. Use Value: Eliminates CPU polling delays - 25 ns tAA ensures sub-microsecond inter-core synchronization for <100 µs jitter-critical motion profiles. |
Use Scenario: Primary flight display (PFD) and navigation display (ND) processors exchange sensor fusion data and overlay commands. IC Role / Device Role / Timing Role: IDT71342LA25J8 provides non-blocking memory access between dissimilar processors; semaphore flags manage shared graphics buffer ownership. Use Value: Prevents display flicker or frame drops - hardware token passing avoids software lock contention during 60 Hz refresh cycles. |
| Medical Imaging Data Buffer | Telecom Baseband Processor |
Use Scenario: FPGA-accelerated image reconstruction engine and ARM host CPU exchange DICOM frames and metadata. IC Role / Device Role / Timing Role: Acts as zero-copy DMA staging buffer; left port interfaces to AXI4-Stream, right port to AHB bus. Use Value: Sustains 1.2 GB/s throughput - 4K × 8 organization and 25 ns access support real-time CT/MRI pipeline buffering without external arbitration logic. |
Use Scenario: Dual-DSP architecture in 4G/LTE baseband processes uplink/downlink channel estimation concurrently. IC Role / Device Role / Timing Role: Shared memory for FFT coefficient tables and channel state information; semaphores coordinate adaptive modulation updates. Use Value: Enables sub-frame scheduling - 25 ns tAA and atomic flag writes meet 3GPP TS 36.213 slot timing constraints for <1 ms TTI processing. |
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 |
|---|---|---|---|
| CY7C024AV-25AXC | 25 ns access, 4K × 8, but no integrated semaphore logic - requires external arbitration or software protocol | Suitable only where interprocessor coordination is handled in firmware or external logic | Select if system already implements software semaphores and cost reduction outweighs hardware arbitration benefit |
| IDT71322LA25JG | Same family, 2K × 16 organization, 25 ns, PLCC-52 - half memory depth but double data width | Better fit for 16-bit bus architectures (e.g., older DSPs); incompatible address/data mapping for 4K × 8 migration | Choose when migrating legacy 16-bit designs or when wider word access reduces bus cycles |
Compared with CY7C024AV-25AXC and IDT71322LA25JG, the IDT71342LA25J8 uniquely delivers 4K × 8 capacity with on-die semaphore logic in PLCC-52 - eliminating external arbitration components and enabling deterministic inter-core synchronization without firmware overhead.
Availability
IDT71342LA25J8 is available at Aetrix Electronics and suitable for industrial motion controllers, avionics displays, medical imaging buffers, telecom baseband processors, and real-time embedded systems requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA25J8 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 product line targets real-time multi-processor systems requiring deterministic memory coherency and hardware-assisted resource arbitration - optimized for industrial, aerospace, and medical applications demanding reliability and low-latency inter-core communication.
FAQ
What is the guaranteed maximum access time for IDT71342LA25J8?
IDT71342LA25J8 has a guaranteed maximum address access time (tAA) of 25 ns over the full industrial temperature range (–40°C to +85°C) and supply voltage (4.5 V to 5.5 V), as specified in Table 09a of the official IDT DSC 2621/16 datasheet. This value applies to both memory and semaphore address access (tSAA = 25 ns max).
Does IDT71342LA25J8 support battery backup operation?
Yes, IDT71342LA25J8 supports battery backup data retention at VCC = 2.0 V minimum, with typical retention current (ICCDR) of 100 µA and maximum of 1500 µA. This capability is exclusive to LA-grade devices and is documented in Table 07 of the IDT71342LA datasheet.
How many semaphore flags does IDT71342LA25J8 provide, and how are they accessed?
IDT71342LA25J8 provides eight independent binary semaphore flags, accessed exclusively via A0–A2 address lines when SEM = VIL. Only I/O0 is used for writing; reads return the flag state across all eight I/O pins. This dedicated address space is physically separate from the 4K × 8 memory array.
What package type is used for IDT71342LA25J8?
IDT71342LA25J8 is packaged in a 52-pin Plastic Leaded Chip Carrier (PLCC), designated PLG52 per IDT documentation. Pin configuration matches Figure 2721 drw 02a, with dimensions approximately 20.0 mm × 20.0 mm × 4.3 mm and 0.635 mm lead pitch.
Is IDT71342LA25J8 compatible with TTL-level signaling?
Yes, IDT71342LA25J8 is fully TTL-compatible: input high voltage (VIH) is specified ≥ 2.2 V, input low voltage (VIL) ≤ 0.8 V, and output drive meets TTL sink/source requirements (VOL ≤ 0.4 V at 6 mA, VOH ≥ 2.4 V at –4 mA), per Tables 04 and 05 in the datasheet.
71342LA25J8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- 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:
- 52-PLCC (19.13x19.13)
71342LA25J8 FAQ
1.How can I place an order for 71342LA25J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA25J8 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 71342LA25J8 reliable?
The price and inventory of 71342LA25J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA25J8 is usually 5 days.
3.What payment methods are accepted for 71342LA25J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA25J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA25J8?
71342LA25J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA25J8 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 71342LA25J8?
For technical support, including 71342LA25J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA25J8 requirements.
6.How does Aetrix verify that 71342LA25J8 is sourced from the original manufacturer or authorized distributors?
All 71342LA25J8 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 71342LA25J8 meets industry standards.
7.What is the process for return or replacement of 71342LA25J8?
All 71342LA25J8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA25J8, 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 71342LA25J8 part is unused and in its original packaging.
Return procedure for 71342LA25J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA25J8 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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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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