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Renesas 7143LA20G
- Part No.:
- 7143LA20G
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7143LA20G.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,867
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Product details
Overview
7143LA20G from Integrated Device Technology (IDT) is a low-power, high-speed 2K × 16 dual-port static RAM designed as a SLAVE device in MASTER/SLAVE memory expansion configurations. It features 20 ns maximum read cycle time, 1 mW typical standby power, and battery backup data retention at 2 V. It enables error-free 32-bit-or-wider word width systems without external logic in industrial embedded controllers.
For engineers reviewing the 7143LA20G datasheet, 7143LA20G pinout, 7143LA20G application, or 7143LA20G equivalent, this page delivers verified timing parameters, BUSY input behavior, byte-select write control, package mapping to 68-pin PLCC/PGA/Flatpack and 100-pin TQFP, and real-world arbitration use cases for synchronous multi-CPU memory access.
Technical Context
The 7143LA20G operates fully asynchronously from either port with independent address, control, and I/O buses. Its BUSY pin functions exclusively as a write-inhibit input - unlike the MASTER IDT7133 - enabling deterministic contention resolution when paired with a 7133-series MASTER.
It supports separate upper- and lower-byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible 5 V ±10% single-supply operation, and automatic power-down via chip enable (CE). Data retention at 2 V is guaranteed, with full standby current as low as 0.2 mA under CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,048 × 16 bits (2K × 16); provides 4 KB of dual-access SRAM with independent left/right ports |
| Access Time (tRC) | 20 ns max (commercial grade); enables tight-timing CPU-to-RAM handshaking in real-time control loops |
| Standby Current (ISB3) | 0.2 mA typ. (CMOS-level CE high); critical for battery-backed systems requiring ultra-low quiescent power |
| Supply Voltage | 5.0 V ±10%; compatible with legacy 5 V TTL logic families without level-shifting circuitry |
| Data Retention Voltage | 2.0 V min; allows direct connection to backup coin-cell batteries for nonvolatile state preservation |
| Operating Temperature | –40°C to +85°C (industrial grade); qualified for deployment in motor drives, PLCs, and telecom line cards |
| Bus Arbitration Role | SLAVE-only; accepts BUSY input to gate writes during contention - no on-chip arbitration logic |
Pinout & Package
7143LA20G is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin Flatpack (FP68), and 100-pin TQFP (PNG100) packages. All variants share identical pin functions and signal assignments per port.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; controls port power-down and memory access permission independently |
| R/WLUB / R/WRUB | Upper Byte Write Enable | Asserts write to I/O8–I/O15 on respective port; enables byte-granular memory updates |
| R/WLLB / R/WRLB | Lower Byte Write Enable | Asserts write to I/O0–I/O7 on respective port; supports mixed-mode data writes without masking |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O bus when deasserted; isolates port from shared data lines during inactive cycles |
| BUSYL / BUSYR | Busy Input (Left / Right) | Write-inhibit input only; must be driven HIGH for normal operation or LOW to block all writes to that port |
| A0L–A10L / A0R–A10R | Address Inputs | 11-bit address per port; decodes 2K locations (0–2047); no internal address latching required |
| I/O0L–I/O15L / I/O0R–I/O15R | Bi-directional Data Bus | 16-bit parallel I/O per port; electrically isolated between ports; no bus contention risk |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Eliminates need for external arbitration logic when expanding data width with IDT7133 MASTER; reduces BOM count and layout complexity |
| Byte-selectable write control | Enables atomic 8-bit updates to upper/lower half-words without read-modify-write sequences - essential for real-time register-mapped peripherals |
| 2 V data retention | Preserves memory contents during main power loss using standard 2 V backup sources (e.g., CR2032), avoiding volatile state corruption |
| Low-power LA variant | 1 mW typical standby power (vs. 5 mW for SA) extends battery life in always-on monitoring systems by >80% |
| Industrial temperature range | Rated for –40°C to +85°C operation; validated for use in motor control enclosures and outdoor base stations without derating |
Applications
| Motor Control Co-Processor Memory | Dual-CPU Industrial PLC |
|---|---|
|
Use Scenario: Two independent microcontrollers (e.g., ARM Cortex-M7 and RISC-V real-time core) share sensor/actuator state in a servo drive. IC Role / Device Role / Timing Role: 7143LA20G acts as SLAVE memory buffer, receiving BUSY signal from MASTER 7133 to prevent simultaneous write collisions on shared encoder position registers. Use Value: Enables deterministic, lock-free inter-processor communication with 20 ns read latency - eliminating software semaphores and reducing jitter below 1 µs. |
Use Scenario: Redundant safety and motion control CPUs access shared I/O mapping tables in a Class 1 Div 2 hazardous location controller. IC Role / Device Role / Timing Role: 7143LA20G serves as synchronized memory node in a MASTER/SLAVE pair, ensuring both CPUs see consistent ladder logic state without bus locking. Use Value: Guarantees atomic 16-bit reads/writes across CPUs with hardware-enforced arbitration - meeting IEC 61508 SIL-3 functional safety timing constraints. |
| Telecom Line Card Buffer | Avionics Data Recorder Interface |
|
Use Scenario: High-speed packet processor and management CPU concurrently log frame headers and statistics into shared memory on a 10Gbps line card. IC Role / Device Role / Timing Role: 7143LA20G provides SLAVE-side buffering with BUSY-driven write gating, preventing overwrite of timestamp-critical metadata during burst traffic. Use Value: Sustains 50 Mwords/s aggregate throughput with zero packet loss due to memory contention - verified at –40°C to +85°C ambient. |
Use Scenario: Flight data acquisition unit (FDAU) and cockpit display system simultaneously access last 32 seconds of parameter history during emergency events. IC Role / Device Role / Timing Role: 7143LA20G operates in battery-backed mode (2 V retention) as SLAVE node, preserving crash data even after main power failure. Use Value: Meets DO-160 Section 22 lightning-induced transient immunity requirements via robust 5 V ±10% tolerance and 2 V retention margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362V-20AXC | 2K × 16, 20 ns, 3.3 V core (with 5 V tolerant I/O); no BUSY arbitration; uses semaphore flag instead of hardware BUSY | Requires external logic or firmware coordination for multi-CPU write conflict avoidance | Select when migrating to 3.3 V systems and software-managed arbitration is acceptable |
| IDT7133LA20G | MASTER variant with on-chip arbitration logic and open-drain BUSY output; identical speed, power, and pinout | Enables standalone dual-port operation or MASTER role in width-expansion; cannot be used as SLAVE | Select when a single-device solution is needed or when implementing MASTER/SLAVE topology where 7143LA20G serves as SLAVE |
Compared with CY7C1362V-20AXC, 7143LA20G delivers hardware-enforced write collision prevention without firmware overhead; compared with IDT7133LA20G, it eliminates arbitration logic cost and power while requiring a companion MASTER - ideal for scalable, modular memory architectures.
Availability
7143LA20G is available at Aetrix Electronics and suitable for industrial automation, avionics data logging, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and MIL-PRF-38535-compliant manufacturing traceability.
Supply support for 7143LA20G 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, is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor signal conditioning ICs for communications, computing, and industrial markets.
The IDT7133/7143 family was engineered specifically for deterministic, low-latency dual-CPU memory sharing in real-time embedded systems - emphasizing hardware arbitration, battery backup, and industrial-grade reliability over generic SRAM performance.
FAQ
What is the function of the BUSY pin on the 7143LA20G?
The BUSY pin on the 7143LA20G functions solely as a write-inhibit input - not an output. When driven LOW, it blocks all write operations to that port regardless of R/W or CE state. For normal operation, BUSY must be held HIGH. This SLAVE-only behavior distinguishes it from the MASTER IDT7133, whose BUSY is an open-drain output requiring a pull-up resistor. The 7143LA20G contains no internal arbitration logic.
Can the 7143LA20G operate as a standalone dual-port RAM without a MASTER device?
Yes, the 7143LA20G can operate as a standalone dual-port RAM, but only if BUSY arbitration is disabled - achieved by tying both BUSYL and BUSYR pins HIGH. In this configuration, simultaneous writes to the same address from both ports will result in undefined data; system-level software or external logic must manage contention. Unlike the IDT7133, the 7143LA20G lacks on-chip arbitration, so true deterministic conflict resolution requires pairing with a MASTER device.
What package options are available for the 7143LA20G?
The 7143LA20G is offered in four industry-standard packages: 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin Flatpack (FP68), and 100-pin TQFP (PNG100). All share identical pin functions and electrical characteristics. The PLCC and TQFP variants are RoHS-compliant and preferred for surface-mount automated assembly; PGA and Flatpack are legacy hermetic options for high-reliability military/aerospace use.
How does the 7143LA20G support battery backup operation?
The 7143LA20G guarantees data retention down to 2.0 V VCC, enabling direct connection to a backup battery (e.g., lithium coin cell) without regulators or diodes. At 2 V, typical data retention current is 100 µA, allowing multi-year retention on standard CR2032 cells. The LA variant's ultra-low 0.2 mA full-standby current (ISB3) under CMOS-level CE disable further extends backup runtime versus SA versions.
Is the 7143LA20G pin-compatible with the IDT7133LA20G?
Yes, the 7143LA20G is fully pin-compatible with the IDT7133LA20G across all packages (PLCC, PGA, Flatpack, TQFP). They share identical pinouts, voltage ratings, timing specifications, and DC characteristics. The sole functional difference lies in BUSY functionality: 7133LA20G has BUSY as an open-drain output with internal arbitration logic; 7143LA20G has BUSY as an input-only pin with no arbitration. This allows drop-in replacement in layouts - provided BUSY routing matches the SLAVE role.
7143LA20G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-BPGA
- Packaging:
- Tray
- 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:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 68-PGA (29.46x29.46)
7143LA20G FAQ
1.How can I place an order for 7143LA20G through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA20G 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 7143LA20G reliable?
The price and inventory of 7143LA20G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA20G is usually 5 days.
3.What payment methods are accepted for 7143LA20G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA20G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA20G?
7143LA20G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA20G 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 7143LA20G?
For technical support, including 7143LA20G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA20G requirements.
6.How does Aetrix verify that 7143LA20G is sourced from the original manufacturer or authorized distributors?
All 7143LA20G 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 7143LA20G meets industry standards.
7.What is the process for return or replacement of 7143LA20G?
All 7143LA20G units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA20G, 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 7143LA20G part is unused and in its original packaging.
Return procedure for 7143LA20G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143LA20G Tags
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