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Renesas 7143LA25PFI8
- Part No.:
- 7143LA25PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7143LA25PFI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,808
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Product details
Overview
7143LA25PFI8 from IDT (now Renesas) is a 2K × 16-bit asynchronous dual-port SRAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting independent left/right port access with 25ns max read cycle time, 1mW typical standby power, and industrial temperature range (–40°C to +85°C), used in real-time embedded control and FPGA co-processor interfaces.
For engineers reviewing the 7143LA25PFI8 datasheet, 7143LA25PFI8 pinout, 7143LA25PFI8 application, or 7143LA25PFI8 equivalent, this page delivers verified timing specs, BUSY-input arbitration behavior, byte-level write control, battery backup data retention at 2V, and 68-pin PLCC package mapping - all confirmed for the exact 7143LA25PFI8 variant.
Technical Context
The 7143LA25PFI8 operates as a SLAVE dual-port RAM with BUSY input (not output), enabling hardware arbitration when paired with IDT7133 MASTER devices. It supports fully asynchronous, independent read/write on left (L) and right (R) ports using separate CE, R/W, OE, address, and I/O buses.
Its low-power LA variant achieves 1mW typical standby current via CMOS design and features battery backup data retention at VCC = 2V. Unlike the MASTER IDT7133, it lacks on-chip arbitration logic and BUSY output - BUSY is strictly an input used to gate writes during contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 16-bit (32,768 bits), dual-port, asynchronous static RAM |
| Max Read Cycle Time (tRC) | 25 ns - defines minimum time between successive reads on same port |
| Standby Current (ISB1) | 1 mA typ. - ultra-low power consumption when both ports disabled (CE high) |
| Data Retention Voltage | 2.0 V - retains stored data during brown-out or battery backup mode |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems |
| Supply Voltage | 4.5 V to 5.5 V - single 5V ±10% TTL-compatible supply |
| I/O Interface | Separate upper/lower byte write enables (R/WLUB/R/WLLB & R/WRUB/R/WRLB) - enables precise byte masking |
Pinout & Package
7143LA25PFI8 is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), with identical pinout to IDT7133/7143 family. Both VCC and GND pins must be connected for reliable operation; BUSY pins are inputs (not outputs) on this SLAVE device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; disables I/O drivers and reduces current to ISB1/ISB2 levels when high |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Controls write to I/O8–I/O15; allows byte-selective writes without external logic |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Controls write to I/O0–I/O7; enables independent 8-bit updates per port |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O bus when high; required for bus sharing in multi-device systems |
| BUSYL / BUSYR | Busy Input (Left / Right) | Write-inhibit signal - forces high-impedance I/O and blocks write cycles during contention |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit address bus per port; supports full 2K-word addressing independently |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (L/R) | 16-bit bidirectional data bus per port; no internal direction control - managed by R/W and OE |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY input architecture | Eliminates need for external arbitration logic when paired with IDT7133 MASTER; prevents write collisions during simultaneous access |
| Byte-selectable write control | Independent upper/lower byte enables per port reduce bus contention and simplify partial-word updates in DSP/FPGA interfaces |
| 2V data retention | Preserves memory contents during main power loss - critical for fault-tolerant control systems and nonvolatile buffer applications |
| Industrial temperature support | Validated operation from –40°C to +85°C ensures reliability in motor drives, PLCs, and outdoor communications equipment |
| Low-power LA design | 1mW typical standby current enables always-on memory in battery-backed instrumentation and portable test gear |
Applications
| Real-Time Motion Control | FPGA Co-Processor Buffer |
|---|---|
Use Scenario: Synchronized servo axis coordination in CNC machines where motion controller and FPGA share position/velocity data with zero-latency access. IC Role / Device Role / Timing Role: SLAVE dual-port RAM provides FPGA-side write access and controller-side read access to shared trajectory buffers; BUSY input prevents overwrites during update windows. Use Value: 25ns tRC enables sub-microsecond data exchange; byte-write enables allow incremental updates to individual axis registers without full-word overhead. |
Use Scenario: High-throughput data staging between FPGA fabric and ARM-based host processor in software-defined radio (SDR) baseband processing. IC Role / Device Role / Timing Role: Acts as SLAVE in MASTER/SLAVE pair with IDT7133, buffering IQ samples; BUSY input synchronizes FPGA writes with host reads to avoid corruption. Use Value: 1mW standby power extends battery life in portable SDR units; 2V retention preserves last known state during hot-swap events. |
| Redundant PLC Memory Module | Avionics Data Logger |
Use Scenario: Dual-CPU programmable logic controller requiring lock-step memory consistency between primary and backup execution units. IC Role / Device Role / Timing Role: 7143LA25PFI8 serves as shared memory SLAVE; MASTER arbitrates access, while SLAVE enforces write inhibition via BUSY to ensure deterministic failover. Use Value: Industrial temp rating ensures operation in cabinet environments up to 85°C; identical pinout allows drop-in replacement of legacy 7143SA variants. |
Use Scenario: Flight data recorder capturing sensor telemetry across multiple aircraft subsystems with guaranteed nonvolatile storage during power interruption. IC Role / Device Role / Timing Role: SLAVE RAM stores timestamped sensor packets; battery-backed 2V retention maintains integrity during engine start-up transients or emergency power loss. Use Value: 68-pin PLCC package supports ruggedized PCB mounting; low ISB3 (0.2 mA typ.) minimizes parasitic drain on backup coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA25PFI8 | SA variant: higher active power (1150 mW typ. vs. 1050 mW), no 2V data retention, commercial/industrial temp only | Suitable for cost-sensitive, non-battery-backed systems where power budget allows higher standby draw | Select when 2V retention is unnecessary and faster tRC margin is needed under worst-case voltage/temp |
| CY7C1362BV33-25ZXC | 3.3V core, 2.5V I/O, 25ns tRC, 100-pin TQFP; no BUSY arbitration, uses semaphore register instead | Requires firmware-managed arbitration; better suited for SoC-based designs with integrated CPU cores | Choose for modern 3.3V systems needing smaller footprint and lower voltage compliance - not pin-compatible |
Compared with IDT7143SA25PFI8 and CY7C1362BV33-25ZXC, the 7143LA25PFI8 uniquely delivers industrial-temp-rated, hardware-arbitrated dual-port operation with battery backup - making it irreplaceable in legacy real-time control systems requiring deterministic BUSY-input contention resolution and 2V retention.
Availability
7143LA25PFI8 is available at Aetrix Electronics and suitable for real-time motion control, FPGA co-processor buffering, redundant PLC modules, avionics data logging, and industrial HMI applications requiring stable component supply and long-term lifecycle support.
Supply support for 7143LA25PFI8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in high-performance memory, timing, and interface solutions for communications, computing, and industrial markets.
The IDT7143 family was designed specifically for hardware-arbitrated dual-port memory expansion in deterministic real-time systems - enabling seamless 32-bit+ word width scaling using MASTER/SLAVE topology without external logic.
FAQ
What is the function of BUSY pins on the 7143LA25PFI8?
The BUSYL and BUSYR pins on the 7143LA25PFI8 are dedicated inputs - not outputs - used exclusively to inhibit write operations during port contention. When asserted low by a MASTER IDT7133, they force the corresponding port's I/O into high-impedance and block writes until de-asserted. This behavior is fundamental to the SLAVE role and differs from the MASTER's open-drain BUSY output.
Does the 7143LA25PFI8 support battery backup operation?
Yes, the 7143LA25PFI8 supports battery backup data retention at VCC = 2.0 V, preserving stored memory contents during main power loss. This feature is intrinsic to the LA (low-power) variant and is validated per datasheet Table 8 (tCDR = 0 ns, VDR = 2.0 V). The 7143LA25PFI8 draws ≤4000 µA in retention mode at industrial temperature.
Can the 7143LA25PFI8 operate as a standalone dual-port RAM without a MASTER device?
Yes, the 7143LA25PFI8 can operate standalone with both BUSY pins tied HIGH (via pull-up resistors), disabling arbitration and enabling independent read/write on both ports. However, simultaneous writes to the same address will cause undefined data - unlike MASTER/SLAVE configurations where hardware arbitration prevents corruption. Standalone use is appropriate only in non-contention scenarios.
What package type does the 7143LA25PFI8 use, and are there pin-compatible alternatives?
The 7143LA25PFI8 uses a 68-pin Plastic Leaded Chip Carrier (PLCC) package, identical to other IDT7133/7143 variants including 7133LA25PFI8 and 7143SA25PFI8. Pin compatibility is confirmed across the family per datasheet Section "Pin Configurations" - enabling direct substitution within the same package footprint, provided thermal and power requirements are met.
How does the 7143LA25PFI8 differ from the IDT7133LA25PFI8 in system implementation?
The 7143LA25PFI8 is a SLAVE device with BUSY inputs and no on-chip arbitration logic, while the IDT7133LA25PFI8 is a MASTER with BUSY outputs and built-in port arbitration. In a 32-bit system, one IDT7133LA25PFI8 controls arbitration and drives BUSY signals to multiple 7143LA25PFI8 SLAVE devices - eliminating "busy lock-out" and enabling scalable, deterministic memory expansion without external gates.
7143LA25PFI8 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:
- 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:
- 100-TQFP (14x14)
7143LA25PFI8 FAQ
1.How can I place an order for 7143LA25PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA25PFI8 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 7143LA25PFI8 reliable?
The price and inventory of 7143LA25PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA25PFI8 is usually 5 days.
3.What payment methods are accepted for 7143LA25PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA25PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA25PFI8?
7143LA25PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA25PFI8 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 7143LA25PFI8?
For technical support, including 7143LA25PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA25PFI8 requirements.
6.How does Aetrix verify that 7143LA25PFI8 is sourced from the original manufacturer or authorized distributors?
All 7143LA25PFI8 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 7143LA25PFI8 meets industry standards.
7.What is the process for return or replacement of 7143LA25PFI8?
All 7143LA25PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA25PFI8, 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 7143LA25PFI8 part is unused and in its original packaging.
Return procedure for 7143LA25PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143LA25PFI8 Tags
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