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Renesas 7143LA90GB
- Part No.:
- 7143LA90GB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7143LA90GB.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,754
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Product details
Overview
7143LA90GB from IDT is a high-speed 2K × 16 dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting independent asynchronous read/write access on left and right ports with 90ns max read cycle time, 2V data retention, and industrial temperature range (–40°C to +85°C) - used in real-time DSP co-processing and military-grade avionics bus arbitration.
For engineers reviewing the 7143LA90GB datasheet, 7143LA90GB pinout, 7143LA90GB application, or 7143LA90GB equivalent, this page delivers verified timing parameters, BUSY-input-controlled write inhibition logic, low-power standby current (1µA typ.), and package-specific pin mapping for 68-pin PLCC, PGA, and flatpack footprints.
Technical Context
The 7143LA90GB operates as a SLAVE dual-port SRAM with dedicated BUSY input (not output), enabling hardware-controlled write blocking during address contention with a MASTER IDT7133 device. It lacks on-chip arbitration logic and relies entirely on external BUSY assertion from the MASTER.
Its dual 11-bit address buses (A0L–A10L / A0R–A10R), separate byte-level write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), and TTL-compatible 5V ±10% supply support fully asynchronous, non-contention memory access - with tBDD = 40ns (max) defining BUSY-disable-to-valid-data delay in port-to-port write-read scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total), organized as two independent 11-bit address spaces |
| Read Cycle Time | 90ns maximum - defines minimum interval between successive reads on same port |
| Standby Current | 1µA typical - enables battery-backed data retention at 2V VCC with ultra-low quiescent power |
| Operating Voltage | 5.0V ±10% - single-supply TTL compatibility with no level-shifting required |
| Temperature Range | –40°C to +85°C - qualified for industrial embedded control and ruggedized communications |
| BUSY Function | Input-only pin - gates internal write operations when asserted HIGH by MASTER IDT7133 |
| Data Retention | 2V minimum VCC - preserves stored data during main power loss without external backup circuitry |
Pinout & Package
7143LA90GB is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), and 68-pin flatpack (FP68) packages - all with identical pinouts per datasheet revision Jun.16.21. Both VCC and GND pins require dual connection for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable controlling port-specific power-down; CE HIGH places port in 1µA standby |
| R/WLUB / R/WRUB | Upper Byte Write Enable | Controls write access to I/O8–I/O15 on respective port; independent of lower-byte control |
| R/WLLB / R/WRLB | Lower Byte Write Enable | Controls write access to I/O0–I/O7 on respective port; enables granular 8-bit writes |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O drivers when HIGH; allows shared bus operation without external buffers |
| BUSYL / BUSYR | BUSY Input (Left / Right) | SLAVE-only function: HIGH inhibits write cycles; requires pull-up if unused |
| A0L–A10L / A0R–A10R | Address Inputs | 11-bit address buses per port - supports full 2K-word addressing independently |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (16-bit bidirectional) | True dual-port data paths - no multiplexing; simultaneous read/write on different ports allowed |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Eliminates need for external arbitration logic when paired with IDT7133 MASTER - simplifies 32-bit+ width expansion |
| Byte-selectable write control | Independent upper/lower byte enables per port allow partial-word writes without read-modify-write overhead |
| 2V data retention | Preserves memory contents during brown-out or battery-backup mode without volatile refresh |
| Ultra-low standby current | 1µA typical draw enables multi-year battery life in always-on monitoring systems |
| Industrial temperature qualification | Validated operation from –40°C to +85°C ensures reliability in engine control units and base station radios |
Applications
| Real-Time DSP Co-Processing | Military Avionics Bus Arbitration |
|---|---|
Use Scenario: Two independent processors (e.g., radar signal processor and flight controller) share memory via dual-port interface with deterministic latency. IC Role / Device Role / Timing Role: SLAVE 7143LA90GB receives BUSY signal from MASTER IDT7133 to prevent concurrent writes to same address - enforcing atomic memory updates. Use Value: Eliminates software locks and polling; guarantees data coherency under worst-case 90ns read cycle timing. | Use Scenario: Redundant mission computers exchange telemetry and command data across MIL-STD-1553 or ARINC-429 bridges. IC Role / Device Role / Timing Role: 7143LA90GB serves as shared buffer with BUSY-driven write blocking - ensuring deterministic response within 40ns tBDD window. Use Value: Meets DO-254 Level A timing constraints for airborne systems; avoids "busy lock-out" via MASTER/SLAVE topology. |
| Industrial PLC Memory Expansion | Telecom Line Card Buffering |
Use Scenario: Programmable logic controller expands local memory width beyond 16 bits using multiple dual-port RAMs in parallel. IC Role / Device Role / Timing Role: 7143LA90GB acts as width-expansion SLAVE, synchronizing writes with MASTER's BUSY assertion to maintain data integrity. Use Value: Enables seamless 32-bit or 64-bit word access without FPGA glue logic or timing-critical external arbitration. | Use Scenario: High-speed TDM switch fabric buffers voice/data packets between line interface and switching matrix. IC Role / Device Role / Timing Role: Dual-port architecture allows simultaneous packet ingress (right port) and egress (left port) with zero-cycle conflict resolution. Use Value: Sustains 11.1 MB/s throughput (90ns cycle × 16-bit width) with guaranteed 2V retention during power failover. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-90JC | 90ns access, 2K × 16, but lacks dedicated BUSY-input SLAVE mode; uses semaphore-based arbitration | Requires external logic or firmware for contention resolution; not drop-in compatible with IDT7133/7143 MASTER/SLAVE topology | Select only if redesigning arbitration scheme; incompatible with existing IDT BUSY routing. |
| AS7C3256B-90JCN | 256K × 16, 90ns, CMOS, but single-port only - no native dual-port or BUSY logic | Cannot replace 7143LA90GB without adding FPGA-based dual-port wrapper and arbitration state machine | Use only for greenfield designs where memory density outweighs real-time coherency requirements. |
Compared with CY7C133-90JC and AS7C3256B-90JCN, the 7143LA90GB uniquely delivers hardware-enforced write blocking via dedicated BUSY input - enabling deterministic, zero-software-overhead memory sharing in safety-critical dual-CPU systems.
Availability
7143LA90GB is available at Aetrix Electronics and suitable for real-time DSP co-processing, military avionics bus arbitration, and industrial PLC memory expansion requiring stable component supply across extended product lifecycles.
Supply support for 7143LA90GB 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 - acquired by Renesas in 2019.
The IDT7143 product line was designed specifically for MASTER/SLAVE dual-port SRAM expansion in high-reliability embedded systems - prioritizing hardware arbitration, low-power retention, and industrial/military temperature resilience.
FAQ
What is the role of BUSY pins on the 7143LA90GB?
The BUSY pins (BUSYL and BUSYR) on the 7143LA90GB function exclusively as inputs - unlike the MASTER IDT7133, which drives BUSY as an open-drain output. When asserted HIGH by the MASTER, they inhibit write operations on the corresponding port. This SLAVE-only behavior eliminates arbitration conflicts in width-expanded systems and is fundamental to the IDT MASTER/SLAVE architecture. The 7143LA90GB does not generate BUSY signals.
Does the 7143LA90GB support battery backup operation?
Yes, the 7143LA90GB supports battery backup operation with guaranteed data retention at VCC ≥ 2.0V - a key feature of the LA (low-power) variant. In retention mode, standby current is typically 100µA (max) across commercial and industrial grades. This enables use in systems requiring persistent memory during main power loss, such as avionics black boxes or industrial UPS-buffered controllers.
Can the 7143LA90GB be used as a standalone dual-port RAM without a MASTER device?
Yes, the 7143LA90GB can operate as a standalone dual-port SRAM without a MASTER IDT7133 - but with critical limitations: BUSY pins must be tied HIGH (to enable writes) or LOW (to disable writes), and hardware arbitration for address contention must be implemented externally or avoided via software coordination. Its SLAVE design means it lacks internal arbitration logic, making autonomous contention resolution impossible.
What package options are available for the 7143LA90GB?
The 7143LA90GB is offered in three 68-pin packages: PLCC (PLG68), ceramic PGA (GU68), and flatpack (FP68) - all with identical pinouts per datasheet Figure 2746 drw 02c. Each requires dual VCC and dual GND connections. The 100-pin TQFP variant (PNG100) is documented for the 7133/7143 family but is not specified for the 7143LA90GB speed grade in available资料.
How does the 7143LA90GB differ from the 7133LA90GB?
The 7143LA90GB is the SLAVE device: it accepts BUSY as an input to gate writes and contains no arbitration logic. The 7133LA90GB is the MASTER: it drives BUSY as an open-drain output, includes on-chip arbitration logic, and provides priority resolution during address contention. They are pin-compatible but functionally asymmetric - intended for complementary use in width-expanded systems, not interchangeably.
7143LA90GB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-BPGA
- 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:
- 90ns
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 68-PGA (29.46x29.46)
7143LA90GB FAQ
1.How can I place an order for 7143LA90GB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA90GB 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 7143LA90GB reliable?
The price and inventory of 7143LA90GB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA90GB is usually 5 days.
3.What payment methods are accepted for 7143LA90GB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA90GB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA90GB?
7143LA90GB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA90GB 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 7143LA90GB?
For technical support, including 7143LA90GB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA90GB requirements.
6.How does Aetrix verify that 7143LA90GB is sourced from the original manufacturer or authorized distributors?
All 7143LA90GB 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 7143LA90GB meets industry standards.
7.What is the process for return or replacement of 7143LA90GB?
All 7143LA90GB units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA90GB, 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 7143LA90GB part is unused and in its original packaging.
Return procedure for 7143LA90GB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143LA90GB 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
Microchip Technology
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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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