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Renesas X5043PIZ-2.7A
- Part No.:
- X5043PIZ-2.7A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X5043PIZ-2.7A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,874
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Product details
Overview
X5043PIZ-2.7A from Renesas (formerly Intersil) is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 4K-bit SPI EEPROM in a single 8-pin PDIP package. It provides 2.93V ±2.5% reset threshold, 200ms reset timeout, and supports 3.3MHz SPI communication - used for reliable microcontroller boot sequencing and nonvolatile configuration storage in industrial embedded systems.
For engineers reviewing the X5043PIZ-2.7A datasheet, X5043PIZ-2.7A pinout, X5043PIZ-2.7A application, or X5043PIZ-2.7A equivalent, key selection criteria include its -40°C to +85°C operating range, reprogrammable VTRIP, block-lock EEPROM protection, and dual-function CS/WDI pin for watchdog monitoring and SPI chip select.
Technical Context
The X5043PIZ-2.7A implements a dedicated low-voltage detection circuit with factory-trimmed 2.93V trip point (±2.5%), asserting active-low RESET until VCC exceeds VTRIP for 200ms. Its watchdog timer uses nonvolatile WD0/WD1 bits to select fixed timeout intervals: 200ms, 600ms, or 1.4s - defaulting to disabled at power-up.
EEPROM operation follows standard SPI protocol with MSB-first 8-bit instruction set (READ/WRITE/WREN/RDSR/WRSR), supporting 16-byte page writes and 5ms typical write cycle time. Block lock protection is controlled via BL0/BL1 bits, enabling selective write-protection of 0%, 25%, 50%, or 100% of the 512×8-bit array.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 2.93V ±2.5% - ensures system reset before microcontroller enters undefined state during brownout |
| Reset Timeout | 200ms nominal - guarantees stable VCC and oscillator startup before processor execution |
| SPI Clock Rate | 3.3MHz max - enables fast configuration read/write without requiring high-speed MCU peripherals |
| EEPROM Endurance | 1,000,000 write cycles - supports frequent calibration or runtime parameter updates over product lifetime |
| Standby Current | <10µA (WDT off) - extends battery life in always-on monitoring applications |
| Operating Temp | -40°C to +85°C - qualified for industrial environments including process control and network infrastructure |
| Package | 8-pin PDIP - compatible with through-hole prototyping and legacy industrial PCB assembly |
Pinout & Package
8-pin PDIP (Plastic Dual In-line Package), 0.3-inch body width, RoHS-compliant Pb-free plus anneal finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select / Watchdog Input | Dual-function pin: enables SPI communication when low; toggling resets watchdog timer |
| 2: WP | Write Protect Input | Active-high hardware lock: disables all nonvolatile writes when held high |
| 3: SO | Serial Output | Push-pull data output synchronized to SCK falling edge - no external pull-up required |
| 4: VSS | Ground | Reference return path for all internal circuits and I/O pins |
| 5: VCC | Supply Voltage | 2.7V–5.5V operation - powers supervisor logic, EEPROM, and reset driver |
| 6: SCK | Serial Clock Input | Controls timing of SPI data transfer; rising edge latches SI, falling edge clocks SO |
| 7: SI | Serial Input | Accepts opcodes, addresses, and write data on rising edge of SCK |
| 8: RESET | Active-Low Reset Output | Open-drain output asserted during power-up, brownout, or watchdog timeout - requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Allows field adjustment of reset threshold using 15–18V VP on WP pin - eliminates need for BOM change when fine-tuning brownout response |
| Block Lock™ EEPROM Protection | Configurable 25%/50%/100% memory write lock via nonvolatile BL0/BL1 bits - prevents accidental corruption of critical firmware or calibration data |
| Watchdog Timer with Nonvolatile Settings | WD0/WD1 bits retain timeout selection across power cycles - ensures consistent fail-safe behavior without MCU reinitialization |
| Direct Write™ EEPROM Cell | Guarantees 1M write cycles and 100-year data retention - suitable for long-lifecycle industrial deployments |
| Inadvertent Write Protection | Three-layer defense: WREN instruction latch, WP pin hardware disable, and status register lock - prevents spurious writes during noise or reset events |
Applications
| Industrial Process Control | Network Infrastructure Equipment |
|---|---|
Use Scenario: PLCs and remote I/O modules require deterministic boot and persistent parameter storage under fluctuating 24VDC supply conditions. IC Role / Device Role / Timing Role: X5043PIZ-2.7A monitors 3.3V logic rail, asserts RESET during brownout, and stores sensor calibration coefficients in protected EEPROM. Use Value: Prevents erratic operation during line sags; block-lock ensures calibration data survives repeated firmware updates. | Use Scenario: Routers and switches maintain configuration integrity across unexpected AC loss or hot-swap events. IC Role / Device Role / Timing Role: X5043PIZ-2.7A holds boot parameters in EEPROM and triggers hard reset if management CPU hangs - monitored via CS/WDI pin toggling. Use Value: Eliminates manual reboot after software lockup; 200ms reset timeout aligns with Ethernet PHY initialization timing. |
| Battery-Powered Monitoring Devices | Intelligent Instrumentation |
Use Scenario: Wireless sensor nodes operate from coin-cell batteries for multi-year deployments with infrequent wake-ups. IC Role / Device Role / Timing Role: X5043PIZ-2.7A provides ultra-low standby current (<10µA) while safeguarding device ID and calibration in EEPROM between transmissions. Use Value: Extends battery life by minimizing quiescent draw; reprogrammable VTRIP allows precise cutoff at end-of-battery voltage. | Use Scenario: Digital multimeters and oscilloscopes store user preferences, probe compensation settings, and self-test results. IC Role / Device Role / Timing Role: X5043PIZ-2.7A serves as secure configuration vault with hardware WP pin enabled during manufacturing test to prevent field corruption. Use Value: Ensures metrological traceability by locking critical settings; 1M endurance supports daily recalibration over 10+ years. |
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 reset threshold; no reprogrammable VTRIP; 1K-bit EEPROM; 1MHz SPI max | Lacks field-adjustable reset voltage and higher-density EEPROM - suitable only for cost-sensitive designs with static supply margins | Select when VTRIP tuning is unnecessary and 4K-bit storage is not required |
| MCP9800T-E/OT | Temperature sensor with I²C interface; no reset/watchdog/EEPROM functions - not functionally equivalent | Provides thermal monitoring only; cannot replace X5043PIZ-2.7A's core supervision functions | Not a valid alternative - excluded due to missing CPU supervisor functionality |
Compared with MAX6361KA29+T and MCP9800T-E/OT, the X5043PIZ-2.7A uniquely combines field-programmable reset voltage, 4K-bit block-locked EEPROM, and watchdog timer in one industrial-grade PDIP package - making it irreplaceable for applications demanding both configurability and long-term data integrity.
Availability
X5043PIZ-2.7A is available at Aetrix Electronics and suitable for industrial process control, network infrastructure equipment, and battery-powered monitoring devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for X5043PIZ-2.7A 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
Renesas Electronics Corporation acquired Intersil in 2017 and maintains full support for legacy Intersil analog and mixed-signal products including the X5043 family.
The X5043 product line was designed specifically for embedded systems requiring integrated power monitoring, fail-safe reset, and nonvolatile configuration storage - targeting industrial, communications, and computing applications where reliability and long-term data retention are critical.
FAQ
What is the factory-default VTRIP voltage for X5043PIZ-2.7A?
The X5043PIZ-2.7A ships with a factory-trimmed VTRIP of 2.93V ±2.5%, corresponding to the "-2.7A" suffix per the ordering table. This threshold is guaranteed over temperature and does not drift with aging. The value is stored in nonvolatile circuitry and remains stable unless explicitly reprogrammed using the VP-based procedure described in the datasheet.
Does X5043PIZ-2.7A support both active-low and active-high reset outputs?
No - the X5043PIZ-2.7A provides only an active-low RESET output (open-drain). The datasheet distinguishes X5043 (active-low) from X5045 (active-high) variants. X5043PIZ-2.7A is strictly an X5043-series part and does not offer configurable reset polarity. External inversion circuitry would be required for active-high signaling.
How is the watchdog timer enabled and configured on X5043PIZ-2.7A?
The watchdog timer on X5043PIZ-2.7A is enabled by programming nonvolatile WD0/WD1 bits in the status register using the WRSR instruction. Default state is disabled (WD1=WD0=1). Timeout intervals - 200ms, 600ms, or 1.4s - are selected by writing specific bit combinations. The timer is reset by toggling the CS/WDI pin from high to low before timeout expiration.
Can X5043PIZ-2.7A's EEPROM be written to while the watchdog is active?
Yes - EEPROM write operations are fully functional with the watchdog enabled. The X5043PIZ-2.7A decouples memory access from watchdog timing. However, during a write cycle, the WIP bit in the status register must be polled to avoid command collisions, and the CS/WDI pin must still be toggled within the selected timeout period to prevent reset assertion.
What is the maximum clock frequency supported by X5043PIZ-2.7A's SPI interface?
The X5043PIZ-2.7A supports a maximum SPI clock frequency of 3.3MHz across its full 2.7V–5.5V VCC range. This is specified in the AC Electrical Characteristics table (page 14 of FN8126 Rev 3.00) and applies regardless of operating temperature or package type. Exceeding this limit may cause read/write failures or status register misreads.
X5043PIZ-2.7A 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:
- 2.92V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
X5043PIZ-2.7A FAQ
1.How can I place an order for X5043PIZ-2.7A through Aetrix?
Please submit a Request for Quotation (RFQ) for X5043PIZ-2.7A 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 X5043PIZ-2.7A reliable?
The price and inventory of X5043PIZ-2.7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5043PIZ-2.7A is usually 5 days.
3.What payment methods are accepted for X5043PIZ-2.7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5043PIZ-2.7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5043PIZ-2.7A?
X5043PIZ-2.7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5043PIZ-2.7A 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 X5043PIZ-2.7A?
For technical support, including X5043PIZ-2.7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5043PIZ-2.7A requirements.
6.How does Aetrix verify that X5043PIZ-2.7A is sourced from the original manufacturer or authorized distributors?
All X5043PIZ-2.7A 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 X5043PIZ-2.7A meets industry standards.
7.What is the process for return or replacement of X5043PIZ-2.7A?
All X5043PIZ-2.7A units undergo pre-shipment inspection (PSI). If there is an issue with X5043PIZ-2.7A, 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 X5043PIZ-2.7A part is unused and in its original packaging.
Return procedure for X5043PIZ-2.7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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