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Renesas X4043PZ
- Part No.:
- X4043PZ
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X4043PZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,192
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Product details
Overview
X4043PZ from Intersil is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 4kbit EEPROM with Block Lock™ protection. It features active-low RESET output, 4.5–4.75V VTRIP threshold, 400kHz I²C interface, and operates from 4.5V to 5.5V. Used in embedded microcontroller systems requiring reliable brownout detection and nonvolatile configuration storage.
For engineers reviewing the X4043PZ datasheet, X4043PZ pinout, X4043PZ application, or X4043PZ equivalent, this page delivers verified technical context, real-world use cases, pin-level design meaning, and validated alternative options for industrial control, medical instrumentation, and programmable logic systems.
Technical Context
The X4043PZ implements a dual-function reset architecture: power-on reset asserts RESET for ≥250ms after VCC stabilization, while low-VCC detection holds RESET active until VCC exceeds 4.5V for ≥200ms. Its watchdog timer monitors SDA/SCL activity and triggers reset if no valid I²C transaction occurs within 200ms, 600ms, or 1.4s - selectable via nonvolatile WD1/WD0 bits.
Internally, it integrates a 512 × 8-bit EEPROM array using Direct Write™ cells (1M write cycles, 100-year retention), organized into 16-byte pages with software-configurable block lock protection (BP2–BP0). The device uses a 2-wire I²C-compatible interface with open-drain SDA/SCL, requiring external pull-ups, and supports VTRIP reprogramming via high-voltage WP pin sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 4.5–4.75V - sets precise brownout detection point for 5V systems; factory-programmed and field-adjustable |
| Reset Output Polarity | Active-low open-drain - requires external pull-up; asserts during power-up, brownout, or watchdog timeout |
| EEPROM Capacity | 4kbit (512 × 8) - stores calibration data, firmware flags, or user configuration without external memory |
| I²C Interface Speed | 400kHz - enables fast parameter updates and status reads in real-time embedded control loops |
| Supply Voltage Range | 4.5V to 5.5V - matches standard 5V logic rails and ensures compatibility with legacy microcontrollers |
| Standby Current | <20µA (watchdog on) - minimizes quiescent draw in battery-backed or always-on monitoring circuits |
| Watchdog Timeout Options | 200ms / 600ms / 1.4s - configurable via nonvolatile WD1/WD0 bits; prevents runaway code without MCU intervention |
Pinout & Package
Package: 8-lead PDIP (Plastic Dual In-line Package), RoHS-compliant Pb-free plus anneal finish. Not recommended for new designs; superseded by MSOP/SOIC variants per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | NC | No internal connection - must be left unconnected; not usable as grounds or bypass points |
| 3 | RESET | Active-low open-drain reset output - drives system reset line; requires external pull-up resistor (typically 4.7kΩ) |
| 4 | VSS | Digital ground reference - connects to system 0V plane; must be low-impedance path to minimize noise coupling |
| 5 | SDA | Serial data bidirectional I²C line - open-drain; shares bus with other I²C slaves; requires pull-up |
| 6 | SCL | Serial clock input - driven by master MCU; timing-critical; must meet 400kHz setup/hold requirements |
| 7 | WP | Hardware write protect - HIGH disables all writes (EEPROM + control register); LOW enables programming |
| 8 | VCC | Positive supply input - powers all internal blocks; must be decoupled with 0.1µF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Programmable VTRIP | Factory-set at 4.5V but reprogrammable to custom thresholds (e.g., 4.62V) using 15–18V pulse on WP pin |
| Block Lock™ EEPROM Protection | Configurable via BP2–BP0 bits to lock 16–512 bytes or full array - prevents accidental overwrites during firmware updates |
| Self-timed EEPROM Writes | 5ms typical write cycle - eliminates need for MCU polling delay; ACK polling supported for synchronization |
| Power-Fail Immunity | RESET remains valid down to VCC = 1V - ensures clean shutdown and prevents partial writes during brownout |
| Low-Power Watchdog | Consumes <20µA standby current even with watchdog enabled - suitable for energy-sensitive remote sensors |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 5V rail in programmable logic controller; stores I/O configuration and fault logs in EEPROM. IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset, brownout reset, and watchdog supervision - ensures deterministic startup and safe fail-safe behavior. Use Value: Prevents corrupted configuration writes during power interruption; enables field-upgradable calibration constants without external memory. |
Use Scenario: Embedded in infusion pump MCU subsystem to supervise main 5V supply and log delivery parameters. IC Role / Device Role / Timing Role: Dual-role supervisor: resets MCU on undervoltage, and safeguards EEPROM-stored dose history against inadvertent overwrite. Use Value: Meets IEC 62304 safety requirements via guaranteed reset assertion below 4.5V and hardware write protection of critical therapy data. |
| Point-of-Sale Terminal | Smart Energy Meter |
Use Scenario: Secures boot integrity and stores merchant-specific settings (tax rates, receipt formats) in protected EEPROM. IC Role / Device Role / Timing Role: System-level supervisor enforcing secure boot sequence and tamper-resistant parameter storage. Use Value: Block Lock™ prevents malicious or accidental modification of financial configuration data; watchdog detects frozen UI threads. |
Use Scenario: Supervises metering SoC supply and retains tariff schedules, billing counters, and event logs across power cycles. IC Role / Device Role / Timing Role: High-reliability supervisor with 100-year EEPROM retention - maintains regulatory compliance data through 15+ year product lifetime. Use Value: Eliminates need for backup battery or FRAM; VTRIP precision ensures accurate brownout response under grid fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPU supervisor with EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| X4043M8Z-4.5A | Same core functionality, identical VTRIP (4.5–4.75V), but in 8-lead MSOP package - 3.0 × 3.0 mm footprint vs. PDIP's 9.27 × 6.35 mm | Designed for space-constrained PCBs; requires rework of land pattern and thermal relief; same pinout mapping | Select when board area is limited and reflow assembly is used; MSOP offers better thermal performance than PDIP |
| X4043S8Z-4.5A | Identical electrical specs and pinout, but in 8-lead SOIC package - industry-standard 150-mil width; RoHS-compliant Pb-free plus anneal | Drop-in replacement for through-hole PDIP in automated SMT lines; compatible with standard SOIC pick-and-place and reflow profiles | Preferred for new designs: eliminates manual insertion, improves yield, and aligns with modern manufacturing standards |
Compared with X4043PZ, X4043M8Z-4.5A reduces board area by >75% and improves thermal dissipation, while X4043S8Z-4.5A enables full SMT production with zero layout change - both retain identical reset timing, EEPROM behavior, and I²C protocol compatibility.
Availability
X4043PZ is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, and smart metering applications requiring stable component supply and long-term lifecycle support.
Supply support for X4043PZ 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 mixed-signal ICs for industrial, computing, and communications markets.
The X4043PZ belongs to Intersil's CPU Supervisor family, designed to consolidate reset, watchdog, voltage monitoring, and nonvolatile storage into a single chip - reducing BOM count and improving system reliability in resource-constrained embedded systems.
FAQ
What is the reset timeout duration for X4043PZ during power-on?
The X4043PZ asserts RESET for a minimum of 250ms after VCC stabilizes above the VTRIP threshold. This guarantees sufficient time for oscillator startup and MCU initialization before code execution begins. The exact duration is internally generated and does not require external components - a key advantage over discrete RC-based reset circuits.
Can the VTRIP voltage of X4043PZ be adjusted, and how is it done?
Yes, the VTRIP voltage of X4043PZ can be reprogrammed using a high-voltage (15–18V) pulse applied to the WP pin during an I²C command sequence. The procedure involves issuing specific slave address (A0h), byte address (01h), and data (00h) commands while holding VCC at the desired trip voltage. This allows field calibration to match system-specific supply tolerances.
Does X4043PZ support I²C multi-master bus configurations?
Yes, X4043PZ supports multi-master I²C buses because its SDA and SCL pins are fully compliant with I²C specification open-drain requirements. It responds only to its own slave address (1010xxx0 for EEPROM, 1011xxx0 for control register) and acknowledges correctly under arbitration - enabling shared bus use with other I²C peripherals without conflict.
What happens to the EEPROM contents of X4043PZ during a brownout event?
During a brownout (VCC < VTRIP), X4043PZ immediately terminates all I²C communication and disables EEPROM writes. Any in-progress write completes safely, but new writes are blocked until VCC recovers and stabilizes. This prevents partial or corrupted data writes - a critical feature for storing calibration or safety-critical parameters.
Is X4043PZ pin-compatible with X4045PZ, and what is the functional difference?
No, X4043PZ is not pin-compatible with X4045PZ. While both share identical pinout and package, X4043PZ provides active-low RESET output, whereas X4045PZ provides active-high RESET. The reset signal polarity is hardwired and cannot be changed - selecting the wrong variant will cause incorrect system reset behavior unless external inversion is added.
X4043PZ 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:
- 4.38V
- 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
X4043PZ FAQ
1.How can I place an order for X4043PZ through Aetrix?
Please submit a Request for Quotation (RFQ) for X4043PZ 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 X4043PZ reliable?
The price and inventory of X4043PZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X4043PZ is usually 5 days.
3.What payment methods are accepted for X4043PZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4043PZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4043PZ?
X4043PZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4043PZ 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 X4043PZ?
For technical support, including X4043PZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4043PZ requirements.
6.How does Aetrix verify that X4043PZ is sourced from the original manufacturer or authorized distributors?
All X4043PZ 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 X4043PZ meets industry standards.
7.What is the process for return or replacement of X4043PZ?
All X4043PZ units undergo pre-shipment inspection (PSI). If there is an issue with X4043PZ, 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 X4043PZ part is unused and in its original packaging.
Return procedure for X4043PZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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MIC826SYMT-TR
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