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Renesas 7143LA55PF8
- Part No.:
- 7143LA55PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7143LA55PF8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,330
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Product details
Overview
7143LA55PF8 from IDT is a low-power, 2K × 16-bit dual-port static RAM designed as a SLAVE device in MASTER/SLAVE memory expansion systems. It features 55 ns maximum read cycle time, 1 µA typical standby current, and operates across industrial temperature range (–40°C to +85°C) with single 5V ±10% supply. It enables error-free 32-bit-or-wider memory systems without external logic.
For engineers reviewing the 7143LA55PF8 datasheet, 7143LA55PF8 pinout, 7143LA55PF8 application, or 7143LA55PF8 equivalent, key selection criteria include its SLAVE-only BUSY input behavior, byte-selectable write control per port, battery backup data retention at 2V, TTL-compatible I/O, and compatibility with IDT7133 MASTER devices for width expansion.
Technical Context
The 7143LA55PF8 implements fully asynchronous dual-port operation with independent left/right address, control, and 16-bit bidirectional I/O buses. Its BUSY pin functions exclusively as a write-inhibit input - unlike the MASTER IDT7133 - enabling deterministic arbitration when paired with a 7133 device.
It supports separate upper- and lower-byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), open-drain-compatible output enables (OEL/OER), and automatic power-down via chip enable (CEL/CER). The LA variant delivers 1050 mW typical active power and 1 mW standby power, with guaranteed 2V data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 Kbit total, organized as 2048 words × 16 bits) |
| Access Time | 55 ns max read cycle time - defines minimum clock period for synchronous interface or maximum bus speed in asynchronous systems |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL logic families and legacy 5V system rails |
| Standby Current | 1 µA typical - enables ultra-low-power battery backup mode with 2V VCC retention |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and control applications |
| Package | 68-pin PLCC (PLG68) - surface-mount, leaded package with 0.95″ × 0.95″ footprint and 0.17″ height |
| Bus Interface | Fully asynchronous dual-port - permits independent, non-blocking reads/writes on left and right ports |
Pinout & Package
7143LA55PF8 is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), designated PLG68. The package is RoHS-compliant, surface-mountable, and features dual rows of gull-wing leads with body dimensions approximately 0.95 in × 0.95 in × 0.17 in.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left Port Address Inputs | 11-bit address bus for left port (2048 locations); must be stable before CE or OE assertion |
| A0R–A10R | Right Port Address Inputs | 11-bit address bus for right port; fully independent timing from left port |
| I/O0L–I/O15L | Left Port Data I/O | 16-bit bidirectional data bus; direction controlled by R/WLUB/R/WLLB and OEL |
| I/O0R–I/O15R | Right Port Data I/O | 16-bit bidirectional data bus; isolated electrically and timing-wise from left port |
| CEL / CER | Chip Enable (Left / Right) | Active-low enables respective port; high = standby mode (1 µA typical) |
| R/WLUB / R/WLLB | Left Upper/Lower Byte Write Enable | Independent byte-level write control - enables partial-word writes without read-modify-write |
| R/WRUB / R/WRLB | Right Upper/Lower Byte Write Enable | Same function as left-side equivalents; supports mixed-width transactions per port |
| OEL / OER | Output Enable (Left / Right) | Active-low enables output drivers; high = high-impedance tri-state |
| BUSYL / BUSYR | Busy Input (Left / Right) | SLAVE-only function: asserted HIGH by MASTER to inhibit writes during contention |
| VCC (×2) | Power Supply | Both pins must be connected to 5V ±10%; decoupling required at each pin |
| GND (×2) | Ground | Both pins must be connected to system ground; low-inductance return path critical |
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 | Enables 8-bit or 16-bit writes per port without data corruption or bus turnaround delays |
| 2V data retention | Preserves memory contents during main power loss using backup battery - critical for real-time control state preservation |
| Industrial temperature rating | Validated operation from –40°C to +85°C - suitable for factory automation, motor drives, and outdoor infrastructure |
| Low-power LA variant | 1050 mW typical active power and 1 µA standby current - reduces thermal load and extends battery life |
Applications
| Industrial Motion Control | Avionics Data Buffering |
|---|---|
Use Scenario: Real-time servo loop coordination between two independent microcontrollers sharing position and velocity data. IC Role / Device Role / Timing Role: SLAVE dual-port RAM synchronizing motion commands and feedback across CPU boundaries with hardware arbitration. Use Value: Eliminates software polling or semaphores; 55 ns access ensures sub-microsecond inter-processor communication latency. |
Use Scenario: Buffered telemetry exchange between flight management computer (FMC) and inertial reference unit (IRU) in DO-254-certified systems. IC Role / Device Role / Timing Role: Asynchronous data bridge with deterministic BUSY-controlled write inhibition during concurrent access. Use Value: Prevents data corruption during simultaneous read/write; 2V retention preserves last-known safe state during brownout. |
| Medical Imaging Subsystem | Test & Measurement Equipment |
Use Scenario: High-speed image frame buffering between acquisition FPGA and display processor in ultrasound systems. IC Role / Device Role / Timing Role: Dual-port memory enabling continuous capture while rendering prior frames - no FIFO bottlenecks. Use Value: 2K × 16 organization matches 16-bit pixel pipelines; 55 ns access sustains >18 MHz pixel clock throughput. |
Use Scenario: Shared memory between pattern generator and digitizer in automated test equipment (ATE) for synchronized stimulus/response capture. IC Role / Device Role / Timing Role: SLAVE device receiving trigger-aligned waveform data from MASTER-controlled acquisition engine. Use Value: Byte-selectable writes allow efficient storage of mixed-precision test vectors; industrial temp rating ensures lab-to-factory deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA55PF8 | SA variant: higher active power (1150 mW typ.), no 2V data retention, same 55 ns speed and pinout | Suitable where battery backup is unnecessary and thermal budget allows higher dissipation | Select SA if industrial temp and speed match but backup retention is not required; verify PCB thermal design. |
| CY7C1362BV33-55AXI | 3.3V core, 55 ns, 2K × 16, but uses different arbitration (semaphore-based), not BUSY-input SLAVE architecture | Requires external logic or firmware coordination; incompatible with IDT7133/7143 MASTER/SLAVE expansion | Choose only for green-field 3.3V designs; not drop-in for existing IDT-based width-expansion layouts. |
Compared with IDT7143SA55PF8, the 7143LA55PF8 trades higher active power for essential 2V data retention and lower standby current - critical for battery-backed systems. Versus CY7C1362BV33-55AXI, it offers native hardware arbitration but requires 5V operation and strict adherence to IDT's MASTER/SLAVE topology.
Availability
7143LA55PF8 is available at Aetrix Electronics and suitable for industrial motion control, avionics data buffering, and medical imaging subsystems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for 7143LA55PF8 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 product line delivers SLAVE-configured dual-port SRAMs optimized for width-expansion architectures with hardware BUSY arbitration - targeting high-reliability industrial, aerospace, and medical systems.
FAQ
What is the role of the BUSY pins on the 7143LA55PF8?
The BUSY pins (BUSYL and BUSYR) on the 7143LA55PF8 function exclusively as inputs - unlike the MASTER IDT7133 - and serve as hardware write-inhibit signals. When asserted HIGH by a connected IDT7133 MASTER device during address contention, they block write operations on the corresponding port. This eliminates race conditions in multi-CPU systems and removes the need for software arbitration protocols. The 7143LA55PF8 does not drive BUSY outputs.
Can the 7143LA55PF8 operate without a MASTER device like the IDT7133?
Yes, the 7143LA55PF8 can operate as a standalone dual-port SRAM without a MASTER device. In this configuration, BUSYL and BUSYR must be tied HIGH (e.g., via pull-up resistors) to enable normal write functionality on both ports. However, hardware arbitration during simultaneous access to the same address is disabled - contention resolution becomes the responsibility of external logic or firmware.
Does the 7143LA55PF8 support battery backup, and what voltage is required?
Yes, the 7143LA55PF8 supports battery backup data retention at 2.0 V minimum (VDR = 2.0 V), as specified in Table 8 of the datasheet. At this voltage, it retains stored data with typical current consumption of 100 µA (max 4000 µA over military temp range). This feature is exclusive to LA variants and is not available in the SA series.
What is the difference between the 7143LA55PF8 and the 7143LA55PGI?
The 7143LA55PF8 uses a 68-pin PLCC (PLG68) package, while the 7143LA55PGI uses a 68-pin ceramic PGA (GU68). Both share identical electrical specifications, timing, and pinout, but differ in mechanical construction: PLCC is plastic, surface-mount, and cost-optimized; PGA is ceramic, through-hole compatible, and rated for higher reliability in harsh environments including military applications.
Is the 7143LA55PF8 pin-compatible with the IDT7133LA55PF8?
Yes, the 7143LA55PF8 is fully pin-compatible with the IDT7133LA55PF8 - same 68-pin PLCC footprint, identical signal assignments, and matching DC/AC electrical characteristics. However, functional differences exist: the 7133LA55PF8 is a MASTER with BUSY output and on-chip arbitration logic, while the 7143LA55PF8 is a SLAVE with BUSY input only and no internal arbitration. They are complementary, not interchangeable.
7143LA55PF8 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:
- 55ns
- Access Time:
- 55 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)
7143LA55PF8 FAQ
1.How can I place an order for 7143LA55PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA55PF8 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 7143LA55PF8 reliable?
The price and inventory of 7143LA55PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA55PF8 is usually 5 days.
3.What payment methods are accepted for 7143LA55PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA55PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA55PF8?
7143LA55PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA55PF8 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 7143LA55PF8?
For technical support, including 7143LA55PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA55PF8 requirements.
6.How does Aetrix verify that 7143LA55PF8 is sourced from the original manufacturer or authorized distributors?
All 7143LA55PF8 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 7143LA55PF8 meets industry standards.
7.What is the process for return or replacement of 7143LA55PF8?
All 7143LA55PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA55PF8, 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 7143LA55PF8 part is unused and in its original packaging.
Return procedure for 7143LA55PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143LA55PF8 Tags
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M24C02-WMN6TP
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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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