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Renesas X5043P-4.5A
- Part No.:
- X5043P-4.5A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X5043P-4.5A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,250
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Product details
Overview
X5043P-4.5A from Intersil is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 4K-bit SPI EEPROM in an 8-lead PDIP package. It provides active-low RESET output, 4.5V–4.75V VTRIP threshold, and operates across 0°C to 70°C. Used in desktop computers and network servers for reliable microcontroller boot sequencing and critical data retention.
For engineers reviewing the X5043P-4.5A datasheet, X5043P-4.5A pinout, X5043P-4.5A application, or X5043P-4.5A equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in FN8126 Rev 3.00 and Intersil's official ordering information.
Technical Context
The X5043P-4.5A implements a dual-function supervisory architecture: a precision low-voltage detector with factory-trimmed 4.63V ±2.5% VTRIP and a nonvolatile-programmable watchdog timer with four selectable timeout intervals (200ms/600ms/1.4s/disabled). Its internal power-on reset circuit asserts RESET for ≥200ms after VCC exceeds VTRIP.
It embeds a 512 × 8-bit SPI EEPROM with Block Lock™ protection, Direct Write™ memory cells (1M write cycles, 100-year data retention), and supports 3.3MHz clock rate with 16-byte page writes. The device uses CS/WDI as combined chip select and watchdog input, and WP as hardware write protect.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 4.63V ±2.5% - sets precise brownout detection point for 4.5–5.5V systems |
| RESET Polarity | Active-low open-drain - requires external pull-up; valid down to VCC = 1V |
| Watchdog Timeout | Selectable: 200ms / 600ms / 1.4s / disabled - configured via nonvolatile WD0/WD1 bits |
| EEPROM Capacity | 4Kbits (512 × 8) - organized as one block; supports 16-byte page writes with 5ms typical cycle time |
| SPI Clock Rate | Up to 3.3MHz - compatible with standard microcontroller SPI peripherals without timing margin violation |
| Standby Current | <10µA (WDT off) or <50µA (WDT on) at VCC = 5.5V - enables battery-backed operation |
| Operating Temp | 0°C to +70°C - qualified for commercial-grade embedded systems and computing equipment |
| Package | 8-lead PDIP (Pb-free) - through-hole mounting; RoHS-compliant with matte tin termination |
Pinout & Package
8-lead PDIP (Plastic Dual In-line Package), Pb-free, RoHS-compliant. Pin 1 marked by notch or dot; pin numbering counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select Input / Watchdog Input | Active-low enable for SPI interface; falling edge resets watchdog timer; high-to-low transition required before any command |
| 2: WP | Write Protect Input | Hardware lock: LOW disables all nonvolatile writes (EEPROM & status register); overrides software WREN |
| 3: SO | Serial Output | Push-pull data output; shifts out read data on SCK falling edge; high-impedance when CS = HIGH |
| 4: VSS | Ground | Reference return path for all internal circuits and I/O; must be connected to system ground plane |
| 5: VCC | Supply Voltage | 4.5V–5.5V operating range; powers reset generator, watchdog, EEPROM, and logic; feeds VTRIP comparator |
| 6: SCK | Serial Clock Input | Controls SPI timing; latches SI data on rising edge; clocks SO data on falling edge; static-compatible |
| 7: SI | Serial Input | Accepts opcodes, addresses, and write data; sampled on SCK rising edge; MSB-first protocol |
| 8: RESET | Reset Output | Active-low open-drain output; asserted during power-up, brownout (VCC < VTRIP), or watchdog timeout |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Voltage threshold adjustable via SPI command sequence using VP = 15–18V on WP pin - enables field calibration to ±10mV |
| Block Lock™ Protection | Nonvolatile BL0/BL1 bits allow selective write-protection of 0%, 25%, 50%, or 100% of EEPROM array - prevents accidental firmware/data corruption |
| Direct Write™ EEPROM | 1 million write cycles endurance and 100-year data retention - eliminates need for wear-leveling firmware in host MCU |
| Dual Reset Sources | Single RESET pin responds to both power supply faults (VCC < VTRIP) and software hangs (watchdog timeout) - reduces BOM count vs discrete solutions |
| Low-Power Standby | <10µA current draw with watchdog disabled - suitable for always-on monitoring in battery-powered instrumentation |
| Hardware + Software Write Protection | Combines WP pin (hardware disable) with WREN instruction and status register lock - multi-layer defense against unintended writes |
Applications
| Desktop Computer BIOS Storage | Industrial PLC Configuration Backup |
|---|---|
|
Use Scenario: Storing BIOS configuration, boot parameters, and hardware calibration data in x86-based motherboards. IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset synchronization and nonvolatile storage for firmware-critical settings. Use Value: Ensures deterministic boot behavior after cold start or brownout; retains settings across 10+ years without backup battery. |
Use Scenario: Preserving I/O mapping, PID tuning constants, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Supervisory watchdog and EEPROM for runtime parameter persistence and fail-safe restart recovery. Use Value: Prevents process interruption during voltage sags; enables automatic restoration of operational state after power loss. |
| Network Server Management Controller | Rack-Mounted Power Supply Monitoring |
|
Use Scenario: Supporting IPMI-compliant Baseboard Management Controllers (BMC) in 1U/2U server chassis. IC Role / Device Role / Timing Role: Dual-role device: generates reset signal for BMC initialization and stores sensor calibration tables. Use Value: Eliminates separate reset IC and serial EEPROM; reduces PCB area by ~30% versus discrete implementation. |
Use Scenario: Monitoring input/output voltages and thermal sensors in telecom-grade AC/DC power supplies. IC Role / Device Role / Timing Role: Voltage supervisor detecting undervoltage conditions and logging fault events to EEPROM. Use Value: Provides traceable failure history for predictive maintenance; supports 1M-cycle logging without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPU supervisor with integrated EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361KA29+T | Fixed 2.93V VTRIP; no reprogrammable threshold; 2K-bit EEPROM; only 200ms/600ms watchdog options | Lacks VTRIP adjustability and 1.4s timeout; lower EEPROM density limits config storage depth | Choose when fixed 2.93V brownout point suffices and design space constraints favor smaller SOIC-8 footprint |
| STM802LSD-46F | 4.63V VTRIP (±2.5%); no integrated EEPROM; standalone reset + watchdog IC; push-pull RESET output | Requires external SPI EEPROM for data storage; higher component count and layout complexity | Prefer when EEPROM size >4Kbit needed or when strict separation of supervisory and memory functions is mandated |
Compared with MAX6361KA29+T and STM802LSD-46F, the X5043P-4.5A uniquely combines field-adjustable VTRIP, full 4K-bit EEPROM, and three watchdog timeout options in a single PDIP package - delivering higher integration, longer data retention, and greater system-level flexibility for cost-sensitive commercial computing designs.
Availability
X5043P-4.5A is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial PLCs requiring stable component supply, long-term data integrity, and deterministic power-on reset behavior.
Supply support for X5043P-4.5A 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
Intersil (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for industrial, computing, and communications markets.
The X5043/X5045 family was designed to replace discrete reset + watchdog + EEPROM solutions in cost-sensitive, space-constrained embedded systems - prioritizing integration, reliability, and field-programmable voltage thresholds.
FAQ
What is the exact VTRIP voltage specification for X5043P-4.5A?
The X5043P-4.5A has a factory-set VTRIP of 4.63V ±2.5%, corresponding to a guaranteed range of 4.50V to 4.75V. This threshold is laser-trimmed and remains stable over temperature and time. It is reprogrammable to custom values using the VP programming sequence described in FN8126 Rev 3.00, Page 6.
Does X5043P-4.5A support both active-low and active-high RESET outputs?
No - the X5043P-4.5A provides only an active-low RESET output (open-drain). The datasheet distinguishes X5043 (active-low) from X5045 (active-high); X5043P-4.5A is explicitly an X5043-series part. An external pull-up resistor is required for proper logic-level translation.
How many write cycles can the EEPROM in X5043P-4.5A endure?
The EEPROM in X5043P-4.5A guarantees a minimum of 1,000,000 write cycles per memory location, enabled by Intersil's proprietary Direct Write™ cell technology. This exceeds the 100,000-cycle spec of earlier generations and supports frequent logging or configuration updates in long-lifecycle products.
Can the watchdog timeout interval be changed dynamically during system operation?
Yes - the watchdog timeout interval in X5043P-4.5A is controlled by nonvolatile WD0/WD1 bits in the status register, which can be rewritten via the WRSR instruction. Once set, the interval persists across power cycles and does not require reconfiguration at boot.
What package type is used for X5043P-4.5A, and is it RoHS-compliant?
X5043P-4.5A is supplied in an 8-lead PDIP (Plastic Dual In-line Package) with Pb-free matte tin plating, fully compliant with RoHS Directive 2011/65/EU. The "P" in the part number denotes PDIP, and the "Z" suffix in related variants confirms Pb-free plus anneal construction.
X5043P-4.5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.62V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
X5043P-4.5A FAQ
1.How can I place an order for X5043P-4.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for X5043P-4.5A 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 X5043P-4.5A reliable?
The price and inventory of X5043P-4.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5043P-4.5A is usually 5 days.
3.What payment methods are accepted for X5043P-4.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5043P-4.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5043P-4.5A?
X5043P-4.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5043P-4.5A 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 X5043P-4.5A?
For technical support, including X5043P-4.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5043P-4.5A requirements.
6.How does Aetrix verify that X5043P-4.5A is sourced from the original manufacturer or authorized distributors?
All X5043P-4.5A 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 X5043P-4.5A meets industry standards.
7.What is the process for return or replacement of X5043P-4.5A?
All X5043P-4.5A units undergo pre-shipment inspection (PSI). If there is an issue with X5043P-4.5A, 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 X5043P-4.5A part is unused and in its original packaging.
Return procedure for X5043P-4.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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