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Renesas 7143LA25JI
- Part No.:
- 7143LA25JI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7143LA25JI.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,239
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Product details
Overview
7143LA25JI from IDT is a 2K × 16-bit high-speed dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting independent asynchronous access on left and right ports with 25 ns max read cycle time, 2V data retention, and industrial temperature range (–40°C to +85°C) - used in real-time embedded control and military-grade avionics interprocessor communication.
For engineers reviewing the 7143LA25JI datasheet, 7143LA25JI pinout, 7143LA25JI application, or 7143LA25JI equivalent, this page delivers verified timing parameters, BUSY-input-controlled arbitration behavior, low-power standby current (1 µA typ.), 68-pin PLCC package mapping, and direct functional alternatives for width-expansion memory designs.
Technical Context
The 7143LA25JI operates as a SLAVE dual-port SRAM with dedicated BUSY input (not output), enabling hardware arbitration when paired with IDT7133 MASTER devices. It lacks on-chip arbitration logic and does not assert BUSY - instead, it gates write operations upon BUSY assertion from the MASTER.
It supports fully asynchronous dual-port operation with separate byte-level write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible 5V ±10% supply, and battery backup mode with 2V VCC sustaining data retention. Its 2K × 16 organization provides 4,096 words of 16-bit storage per port.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16-bit (4,096 words × 16 bits) - supports 32-bit+ bus width expansion via MASTER/SLAVE topology |
| Access Time (tRC) | 25 ns (max) - guarantees full-speed read cycle at 40 MHz clock-equivalent operation |
| Supply Voltage | 5.0 V ±10% - single-rail TTL-compatible interface; no level-shifting required |
| Standby Current | 1 µA (typ) - enables ultra-low-power battery-backed retention mode at 2V VCC |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Package | 68-pin PLCC (PLG68) - surface-mount compatible with standard reflow profiles |
| Data Retention | 2V minimum VCC - maintains stored data during main power loss using backup battery |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC, package code PLG68), body size ≈ 0.95 in × 0.95 in × 0.17 in. Both VCC and GND pins require connection to ensure reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable controlling port access; drives port into low-power standby when HIGH |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Controls write to I/O8–I/O15; allows independent byte writes without affecting lower byte |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Controls write to I/O0–I/O7; enables granular 8-bit updates per port |
| OEL / OER | Output Enable (L/R) | Tri-states I/O drivers when HIGH; permits shared bus usage without contention |
| BUSYL / BUSYR | Busy Input (L/R) | SLAVE-only function: asserts write-inhibit when driven LOW by MASTER's open-drain BUSY output |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit address bus per port - selects one of 2K (2048) memory locations |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (L/R) | 16-bit bidirectional data path per port; supports simultaneous read/write across ports |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY input architecture | Eliminates need for external arbitration logic when expanding data width beyond 16 bits |
| Independent byte write control | Enables atomic 8-bit updates per port without disturbing adjacent bytes - critical for multi-processor flag registers |
| 2V data retention | Preserves memory contents during brown-out or main power failure using backup battery |
| Low active power (1050 mW typ) | Reduces thermal load in dense embedded systems while maintaining 25 ns performance |
| TTL-compatible signaling | Interoperates directly with legacy 5V microcontrollers, FPGAs, and ASICs without level shifters |
Applications
| Real-Time Avionics Bus Interface | Military Radar Signal Processing Buffer |
|---|---|
Use Scenario: Dual-CPU systems exchanging telemetry and command packets via shared memory with deterministic latency. IC Role / Device Role / Timing Role: SLAVE dual-port RAM synchronizing data transfer between flight control and navigation processors using MASTER/SLAVE arbitration. Use Value: 25 ns access time ensures sub-microsecond interprocessor handshaking; BUSY input prevents corrupted writes during concurrent access. |
Use Scenario: High-throughput radar front-end buffering where ADC samples and DSP results share memory under hard real-time deadlines. IC Role / Device Role / Timing Role: Width-expanded 32-bit memory subsystem using multiple 7143LA25JI SLAVEs coordinated by one IDT7133 MASTER. Use Value: Independent port arbitration eliminates software locks; 2V retention preserves last valid frame during power interruption. |
| Industrial PLC Dual-Core Communication Hub | Secure Military Crypto Module Shared Memory |
Use Scenario: Redundant safety controller and main logic controller sharing status flags and I/O images in deterministic cyclic execution. IC Role / Device Role / Timing Role: SLAVE device in dual-port configuration enabling lock-free memory access between safety-certified and non-certified cores. Use Value: Byte-level write enables allow atomic update of individual status bits; industrial temp rating ensures reliability in factory-floor enclosures. |
Use Scenario: Tamper-resilient cryptographic engine requiring isolated but synchronized key and ciphertext exchange between encryption and authentication units. IC Role / Device Role / Timing Role: Battery-backed SLAVE RAM storing ephemeral keys with hardware-enforced write gating via BUSY signal. Use Value: 1 µA standby current extends battery life; 2V retention sustains key integrity during physical intrusion attempts that cut main power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA25JI | Higher active power (1150 mW typ vs. 1050 mW), no battery backup support - lacks 2V data retention capability | Suitable only for mains-powered systems where battery backup is unnecessary | Select when lowest standby current is not required and system has stable 5V supply |
| CY7C1362BV25 | 3.3V core, 5V-tolerant I/O; 25 ns access, but uses different arbitration model (no native MASTER/SLAVE BUSY routing) | Requires external logic or firmware coordination for multi-chip width expansion | Choose for mixed-voltage systems needing 3.3V compatibility, accepting added design complexity |
Compared with IDT7143SA25JI and CY7C1362BV25, the 7143LA25JI uniquely delivers industrial-temp-rated 2V data retention and native SLAVE arbitration - making it irreplaceable in battery-backed, width-expanded dual-processor architectures without external glue logic.
Availability
7143LA25JI is available at Aetrix Electronics and suitable for real-time avionics bus interfaces, military radar signal processing buffers, and industrial PLC dual-core communication hubs requiring stable component supply across extended product lifecycles.
Supply support for 7143LA25JI 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
IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics.
The IDT7143 family was designed specifically for high-reliability dual-processor shared-memory systems requiring hardware arbitration, battery backup, and industrial/military temperature operation - with the LA variant optimized for ultra-low standby power.
FAQ
What is the role of BUSY pins on the 7143LA25JI?
The 7143LA25JI features BUSYL and BUSYR as inputs-not outputs-enabling it to function exclusively as a SLAVE in MASTER/SLAVE configurations. When the MASTER (IDT7133) asserts BUSY, the 7143LA25JI internally gates write operations to prevent data corruption. This eliminates need for external arbitration logic in width-expanded memory systems.
Does the 7143LA25JI support battery backup operation?
Yes, the 7143LA25JI supports battery backup with guaranteed data retention down to VCC = 2.0 V. In retention mode, typical current draw is 100 µA (max 4000 µA over military temp range), allowing long-term storage of critical state data during main power loss - a key feature distinguishing LA from SA variants.
Can the 7143LA25JI operate independently without a MASTER device?
Yes, the 7143LA25JI can operate as a standalone dual-port SRAM. Its BUSY pins may be tied HIGH to disable write-inhibit functionality, enabling full asynchronous read/write on both ports. However, concurrent access to the same address will cause undefined data - hardware arbitration requires pairing with an IDT7133 MASTER.
What is the significance of "25" in the 7143LA25JI part number?
The "25" in 7143LA25JI specifies the maximum read cycle time: 25 ns. This defines the speed grade and correlates directly to tRC, tAA, tACE, and other AC timing parameters. It also indicates qualification for industrial temperature range (–40°C to +85°C), unlike commercial-only "20" variants.
Which package types are available for the 7143LA25JI?
The 7143LA25JI is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), designated PLG68. While the IDT7143 family also offers 68-pin ceramic PGA, flatpack, and 100-pin TQFP variants, the "JI" suffix specifically denotes the PLCC version - confirmed by IDT documentation and distributor listings.
7143LA25JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-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:
- 2K x 16
- 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:
- 68-PLCC (24.21x24.21)
7143LA25JI FAQ
1.How can I place an order for 7143LA25JI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA25JI 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 7143LA25JI reliable?
The price and inventory of 7143LA25JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA25JI is usually 5 days.
3.What payment methods are accepted for 7143LA25JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA25JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA25JI?
7143LA25JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA25JI 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 7143LA25JI?
For technical support, including 7143LA25JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA25JI requirements.
6.How does Aetrix verify that 7143LA25JI is sourced from the original manufacturer or authorized distributors?
All 7143LA25JI 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 7143LA25JI meets industry standards.
7.What is the process for return or replacement of 7143LA25JI?
All 7143LA25JI units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA25JI, 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 7143LA25JI part is unused and in its original packaging.
Return procedure for 7143LA25JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143LA25JI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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