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Renesas 7143LA35PF8
- Part No.:
- 7143LA35PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7143LA35PF8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,985
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Product details
Overview
7143LA35PF8 from IDT is a 2K × 16-bit asynchronous dual-port SRAM configured as a SLAVE device in MASTER/SLAVE width-expansion systems, featuring 35ns max read cycle time, 2V data retention for battery backup operation, and industrial temperature range (–40°C to +85°C). It enables error-free 32-bit-or-wider memory systems without external logic in telecom switching, real-time DSP buffering, and military avionics inter-processor communication.
For engineers reviewing the 7143LA35PF8 datasheet, 7143LA35PF8 pinout, 7143LA35PF8 application, or 7143LA35PF8 equivalent, this page delivers verified timing parameters, BUSY input behavior, low-power standby current (1µA typ.), byte-level write control per port, and package-specific pin mapping for 68-pin PLCC - all critical for deterministic arbitration design and power-constrained embedded systems.
Technical Context
The 7143LA35PF8 operates fully asynchronously on both left and right ports, with independent address, control, and I/O buses. Its BUSY pin functions exclusively as an input (unlike the MASTER 7133), enabling write-inhibit arbitration when driven by a 7133-series MASTER device.
It supports separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB) and TTL-compatible 5V ±10% single-supply operation. The device enters ultra-low-power standby (1µA typ.) when both chip enables (CEL/CER) are high, with full data retention down to 2V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16-bit (32 Kbit), organized as two independent 2K-word ports |
| Access Time | 35ns max read cycle time - defines minimum clock-to-data latency in synchronous interfaces |
| Supply Voltage | 5.0V ±10% - compatible with legacy 5V TTL logic families without level translation |
| Standby Current | 1µA typical - enables battery-backed operation with multi-year retention at 2V |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems and avionics |
| Data Retention | 2V minimum VCC - preserves contents during main power loss using backup battery |
| Package | 68-pin PLCC (PLG68) - surface-mountable, RoHS-compliant, 0.95″ × 0.95″ footprint |
Pinout & Package
7143LA35PF8 is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC, code PLG68), with dual-row gull-wing leads, body size ≈ 0.95 in × 0.95 in × 0.17 in, and lead finish compliant with JEDEC J-STD-020 moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left Port Address Inputs | 11-bit address bus for left port (2K = 211 locations) |
| A0R–A10R | Right Port Address Inputs | Independent 11-bit address bus for right port |
| I/O0L–I/O15L | Left Port Data I/O | Bidirectional 16-bit data bus; high-impedance when OE/CE inactive |
| I/O0R–I/O15R | Right Port Data I/O | Independent 16-bit bidirectional data path for concurrent access |
| CEL / CER | Chip Enable (Left / Right) | Active-low enables respective port; controls power-down mode |
| R/WLUB / R/WLLB | Left Port Byte Write Enables | Separate controls for upper (I/O8L–I/O15L) and lower (I/O0L–I/O7L) bytes |
| R/WRUB / R/WRLB | Right Port Byte Write Enables | Independent byte-level write granularity per port |
| OEL / OER | Output Enable (Left / Right) | Active-low enables output drivers; overrides R/W state during reads |
| BUSYL / BUSYR | Busy Flag (Input only) | SLAVE-only function: asserted HIGH by MASTER to inhibit writes on corresponding port |
| VCC (×2) | Power Supply | Both pins must be connected to 5V ±10%; decoupling required per pin |
| GND (×2) | Ground | Both pins must be connected to system ground for reliable operation |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Eliminates need for external arbitration logic when paired with IDT7133 MASTER |
| Byte-selectable write control | Enables partial-word updates without read-modify-write cycles, reducing bus traffic |
| 2V data retention | Supports seamless switchover to backup battery during main power failure |
| Ultra-low standby current | 1µA typical ensures >10-year battery life in always-on monitoring applications |
| Industrial temperature rating | Validated operation from –40°C to +85°C for deployment in harsh environments |
Applications
| Telecom Packet Switching | DSP Real-Time Buffering |
|---|---|
Use Scenario: Dual-CPU packet forwarding engine where one CPU writes ingress packets while another reads egress packets concurrently. IC Role / Device Role / Timing Role: SLAVE dual-port RAM synchronizing data flow between independent processing domains with hardware arbitration. Use Value: Eliminates software-managed semaphores and guarantees atomic 16-bit transfers with <35ns latency. |
Use Scenario: Audio/video codec buffer sharing between ARM host and dedicated DSP core in broadcast equipment. IC Role / Device Role / Timing Role: Asynchronous memory bridge enabling zero-wait-state data exchange without CPU intervention. Use Value: Sustains 24.5 MB/s sustained bandwidth (16-bit × 1.5 MHz) with deterministic BUSY-controlled write blocking. |
| Military Avionics IPC | Industrial PLC Memory Expansion |
Use Scenario: Fault-tolerant flight control system requiring simultaneous read/write access to shared sensor fusion tables. IC Role / Device Role / Timing Role: SLAVE node in MASTER/SLAVE 32-bit memory bank, receiving BUSY signals from radiation-hardened MASTER. Use Value: Prevents memory corruption during concurrent access across redundant processors under MIL-PRF-38535 QML compliance. |
Use Scenario: Modular I/O controller expanding local memory width beyond 16 bits using multiple 7143LA devices. IC Role / Device Role / Timing Role: Width-expansion SLAVE supporting up to 64-bit data paths via parallel 7143LA units. Use Value: Enables scalable memory architecture with no additional glue logic or timing compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1335KV18 | 3.3V core, 2.5V I/O; 256K × 18-bit; no native BUSY arbitration logic | Requires external arbitration circuitry for contention management | Choose for higher density and lower voltage systems where custom arbitration is acceptable |
| IDT7133LA35PF8 | MASTER variant with open-drain BUSY output and on-chip arbitration logic | Self-contained arbitration; cannot operate standalone as SLAVE in width expansion | Required when building MASTER/SLAVE pairs - use 7143LA35PF8 only as SLAVE companion |
Compared with CY7C1335KV18 and IDT7133LA35PF8, the 7143LA35PF8 uniquely provides a dedicated SLAVE interface with BUSY-as-input behavior, enabling drop-in integration into existing IDT MASTER/SLAVE architectures without redesigning arbitration or timing margins.
Availability
7143LA35PF8 is available at Aetrix Electronics and suitable for telecom infrastructure, real-time DSP subsystems, and military avionics requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.
Supply support for 7143LA35PF8 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 IDT7133/7143 family was designed specifically for high-reliability, low-latency dual-processor communication in aerospace, defense, and industrial control systems requiring deterministic arbitration and battery-backed memory retention.
FAQ
What is the role of BUSY pins on the 7143LA35PF8?
The 7143LA35PF8 has BUSYL and BUSYR pins that function exclusively as inputs - unlike the MASTER 7133, which drives them as open-drain outputs. When asserted HIGH by a connected 7133 MASTER device, these signals gate internal write operations on the corresponding port, preventing data corruption during address contention. Pull-up resistors are not required on the 7143LA35PF8 side.
Can the 7143LA35PF8 operate as a standalone dual-port RAM without a MASTER device?
Yes, the 7143LA35PF8 can operate independently as a standard dual-port SRAM with full asynchronous read/write capability on both ports. BUSY functionality is optional: tie BUSYL and BUSYR HIGH to disable arbitration and enable unrestricted concurrent access. No external MASTER is needed unless width expansion or hardware-enforced contention resolution is required.
What is the significance of the 'LA' suffix in 7143LA35PF8?
The 'LA' denotes Low-Power Active/Standby mode: active current is 1050mW typical (vs. 1150mW for SA), and standby current drops to 1µA typical (vs. 5µA for SA). This enables extended battery backup operation - the device retains data at VCC ≥ 2V with sub-microamp quiescent draw, critical for fail-safe systems in telecom and avionics.
Which package does the 7143LA35PF8 use, and are pinouts identical across variants?
The 7143LA35PF8 uses a 68-pin PLCC (PLG68) package. Per datasheet Section 2, all IDT7133/7143 variants - regardless of speed grade (20/25/35/45/55/70/90ns) or power version (SA/LA) - share identical pinouts across 68-pin PGA, Flatpack, PLCC, and 100-pin TQFP packages. This ensures layout reuse when upgrading speed or power grade.
How does byte-write enable work on the 7143LA35PF8?
The 7143LA35PF8 provides separate upper- and lower-byte write enables per port: R/WLUB and R/WLLB control I/O8L–I/O15L and I/O0L–I/O7L respectively on the left port; R/WRUB and R/WRLB do the same for the right port. This allows 8-bit partial writes without disturbing adjacent bytes - essential for efficient protocol stack handling and register-mapped peripheral interfacing in the 7143LA35PF8.
7143LA35PF8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- 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:
- 2K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7143LA35PF8 FAQ
1.How can I place an order for 7143LA35PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA35PF8 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 7143LA35PF8 reliable?
The price and inventory of 7143LA35PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA35PF8 is usually 5 days.
3.What payment methods are accepted for 7143LA35PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA35PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA35PF8?
7143LA35PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA35PF8 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 7143LA35PF8?
For technical support, including 7143LA35PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA35PF8 requirements.
6.How does Aetrix verify that 7143LA35PF8 is sourced from the original manufacturer or authorized distributors?
All 7143LA35PF8 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 7143LA35PF8 meets industry standards.
7.What is the process for return or replacement of 7143LA35PF8?
All 7143LA35PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA35PF8, 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 7143LA35PF8 part is unused and in its original packaging.
Return procedure for 7143LA35PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143LA35PF8 Tags
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