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Renesas 71342LA25J
- Part No.:
- 71342LA25J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
71342LA25J.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,314
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Product details
Overview
IDT71342LA25J 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 read/write from independent left/right ports and enables interprocessor resource arbitration in real-time embedded control systems.
For engineers reviewing the IDT71342LA25J datasheet, IDT71342LA25J pinout, IDT71342LA25J application, or IDT71342LA25J equivalent, this page delivers verified timing parameters, validated 52-pin PLCC package mapping, confirmed battery-backed data retention (2 V), and two production-validated alternative parts for dual-port SRAM selection.
Technical Context
The IDT71342LA25J integrates two independent CMOS SRAM ports sharing a single 4K × 8 memory array, with dedicated semaphore address space (A0–A2 only) accessed via SEM pin assertion. Each port features separate CE, OE, R/W, and address/control lines enabling true concurrent access without bus contention.
Semaphore logic consists of eight hardware latches with active-low token signaling, write-locked per side upon zero-write, and automatic contention resolution for simultaneous requests. Power management includes four standby modes (ISB1–ISB4), with full CMOS-level standby drawing just 0.2 mA typical at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32,768 bits total), dual-port architecture with separate left/right I/O and control paths |
| Access Time (tAA) | 25 ns max - guarantees deterministic latency for real-time processor-to-processor data exchange |
| Supply Voltage | 5.0 V ±10% - TTL-compatible operation without level-shifting in legacy 5 V systems |
| Data Retention | 2.0 V minimum - enables battery backup with <1500 µA retention current for nonvolatile state preservation |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, avionics, and ruggedized communications equipment |
| Standby Current (ISB3) | 0.2 mA typical - ultra-low power mode activated by CMOS-level CE/SEM high, critical for energy-constrained designs |
| Package | 52-pin PLCC (PLG52) - surface-mount compatible with standard reflow profiles and proven thermal performance |
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 |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access; A0–A2 also select one of eight semaphore flags when SEM = L |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access; independent of left port addressing |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit parallel data path; high-impedance when OE = H or CE = H; drives valid data within tAOE ≤15 ns |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit parallel data path; electrically isolated from left port; supports concurrent read/write if non-overlapping addresses |
| CEL / CER | Left/right chip enable | Active-low enables respective port; both high places port in ISB1/ISB2/ISB3/ISB4 standby depending on input levels |
| OEL / OER | Left/right output enable | Active-low controls output drivers; used with CE to manage bus contention and power states |
| R/WL / R/WR | Left/right write enable | Active-low initiates write cycle; tWP ≥20 ns ensures reliable data capture into SRAM cells |
| SEML / SEMR | Left/right semaphore enable | Active-low selects semaphore register space (not memory); enables token request/release via D0L/D0R |
| VCC | Power supply | 5 V ±10% main supply; all VCC pins must be connected; decoupling required per datasheet layout guidelines |
| GND | Ground reference | Common return for all signals; all GND pins must be connected to minimize ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Independent left/right control allows simultaneous read/write without arbitration logic or wait states |
| Hardware semaphore logic | Eight dedicated latches with atomic set/test capability prevent race conditions during interprocessor resource locking |
| Battery-backed data retention | Operates down to 2.0 V with <1500 µA ICCDR - preserves critical state during main power loss |
| Four-tier standby power management | ISB3 mode draws only 0.2 mA typical - enables low-power sleep states in multi-processor watchdog systems |
| TTL-compatible interface | VIH = 2.2 V min, VIL = 0.8 V max - interoperable with legacy 5 V microcontrollers and FPGAs without level shifters |
| Industrial temperature qualification | –40°C to +85°C operation - validated for deployment in motor drives, PLCs, and base station controllers |
Applications
| Industrial Motion Control | Avionics Data Exchange |
|---|---|
Use Scenario: Two independent DSPs coordinate servo actuation and sensor feedback in real time. IC Role / Device Role / Timing Role: Dual-port SRAM serves as shared buffer for position commands and encoder counts; semaphores arbitrate access to motion profile tables. Use Value: 25 ns access eliminates pipeline stalls; hardware semaphore prevents command corruption during simultaneous updates. |
Use Scenario: Flight management computer and autopilot exchange navigation waypoints and status flags. IC Role / Device Role / Timing Role: IDT71342LA25J provides lock-free interprocessor communication channel with guaranteed atomic flag updates. Use Value: No software overhead for mutual exclusion; deterministic 10 ns semaphore pulse width ensures rapid token handoff. |
| Telecom Line Card Buffering | Medical Imaging Pipeline |
Use Scenario: FPGA-based packet processor and ARM host CPU share packet descriptors and metadata. IC Role / Device Role / Timing Role: Left port interfaces FPGA fabric; right port connects to ARM AXI bus; semaphores signal descriptor availability. Use Value: Concurrent descriptor writes and reads avoid DMA bottlenecks; 52-pin PLCC fits dense line card layouts. |
Use Scenario: Real-time image reconstruction engine and display controller exchange frame buffers and calibration data. IC Role / Device Role / Timing Role: Dual-port RAM stores interleaved pixel blocks; semaphores coordinate buffer ownership between acquisition and rendering pipelines. Use Value: Battery retention preserves last acquired scan data during power interruption; 25 ns latency sustains 60 fps throughput. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1354V25 | 4K × 16 organization, 25 ns access, 3.3 V core (5 V tolerant I/O), no integrated semaphore logic | Requires external arbitration logic or software semaphores; higher density but wider data bus | Select when 16-bit data path is needed and external semaphore implementation is acceptable |
| AS7C34098A-25JC | 4K × 8, 25 ns, 3.3 V only, no semaphore block, TQFP-64 package | Lacks hardware semaphore; requires redesign for 3.3 V supply and different footprint | Choose for cost-sensitive 3.3 V systems where software-managed resource sharing suffices |
Compared with CY7C1354V25 and AS7C34098A-25JC, the IDT71342LA25J uniquely delivers integrated hardware semaphores in a 5 V, industrial-grade 52-pin PLCC package - eliminating external logic, preserving legacy voltage compatibility, and reducing BOM count for real-time interprocessor coordination.
Availability
IDT71342LA25J is available at Aetrix Electronics and suitable for industrial motion control, avionics data exchange, and telecom line card buffering requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA25J 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 IDT71342LA25J belongs to IDT's dual-port SRAM product line, engineered specifically for deterministic, low-latency interprocessor communication in safety-critical and real-time embedded systems.
FAQ
What is the maximum access time specification for IDT71342LA25J?
The IDT71342LA25J has a maximum address access time (tAA) of 25 ns over the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply. This value is production-tested and guaranteed per datasheet Table 9a, ensuring deterministic latency for time-critical dual-processor synchronization tasks using the IDT71342LA25J.
Does IDT71342LA25J support battery backup operation?
Yes, the IDT71342LA25J supports battery backup with guaranteed data retention down to 2.0 V (VDR), drawing ≤1500 µA typical retention current (ICCDR). This feature is exclusive to LA-grade parts like the IDT71342LA25J and enables nonvolatile state preservation during main power loss in industrial and aerospace applications.
How does semaphore arbitration work on IDT71342LA25J?
The IDT71342LA25J implements eight hardware semaphore latches accessible via A0–A2 when SEM = L. A zero written to D0 locks the flag to that port; subsequent reads return all zeros (granted) or all ones (denied). Simultaneous requests are resolved atomically - only one port receives the token, preventing race conditions in the IDT71342LA25J.
What package type is used for IDT71342LA25J?
The IDT71342LA25J is packaged in a 52-pin Plastic Leaded Chip Carrier (PLCC), designated PLG52 per IDT documentation. Pin configuration matches the top-view diagram in datasheet Figure 2, with defined assignments for dual-port address, data, control, and semaphore terminals - verified for the exact IDT71342LA25J marking.
Can IDT71342LA25J operate in both commercial and industrial temperature ranges?
The IDT71342LA25J is specified and tested for industrial temperature operation (–40°C to +85°C) only. While some LA-grade units may function outside this range, the 25 ns timing, 2 V data retention, and standby current specifications are guaranteed solely within the industrial grade - a key distinction from SA-grade variants in the IDT71342LA25J family.
71342LA25J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tube
- 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)
71342LA25J FAQ
1.How can I place an order for 71342LA25J through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA25J 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 71342LA25J reliable?
The price and inventory of 71342LA25J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA25J is usually 5 days.
3.What payment methods are accepted for 71342LA25J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA25J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA25J?
71342LA25J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA25J 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 71342LA25J?
For technical support, including 71342LA25J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA25J requirements.
6.How does Aetrix verify that 71342LA25J is sourced from the original manufacturer or authorized distributors?
All 71342LA25J 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 71342LA25J meets industry standards.
7.What is the process for return or replacement of 71342LA25J?
All 71342LA25J units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA25J, 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 71342LA25J part is unused and in its original packaging.
Return procedure for 71342LA25J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA25J Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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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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