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Renesas X4043PIZ-2.7A
- Part No.:
- X4043PIZ-2.7A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X4043PIZ-2.7A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,904
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Product details
Overview
X4043PIZ-2.7A 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 operates from 2.7V to 5.5V, asserts active-low RESET down to VCC = 1V, supports 400kHz I²C interface, and delivers <1µA standby current with watchdog disabled - used in industrial microcontroller systems requiring reliable brownout recovery and nonvolatile configuration storage.
For engineers reviewing the X4043PIZ-2.7A datasheet, X4043PIZ-2.7A pinout, X4043PIZ-2.7A application, or X4043PIZ-2.7A equivalent, key selection criteria include its -40°C to +85°C temperature range, 2.85–3.0V reset threshold, 8-pin PDIP package, EEPROM endurance (1M cycles), and programmable VTRIP capability for precision voltage monitoring.
Technical Context
The X4043PIZ-2.7A implements a dual-function reset architecture: power-on reset with 250ms timeout and low-VCC detection with 200ms hysteresis, both driving the open-drain RESET pin. Its watchdog timer monitors SDA/SCL activity and offers three timeout options (200ms/600ms/1.4s) via nonvolatile WD1/WD0 bits.
EEPROM operation uses a 2-wire I²C-compatible interface with slave address 0xA0 (array) or 0xB0 (control register), supports 16-byte page writes with self-timed 5ms typical write cycle, and enforces write protection via hardware WP pin and software-configurable BP2–BP0 block lock bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 5.5V - supports single-supply operation across 3.3V and 5V logic domains without level shifting. |
| Reset Threshold (VTRIP) | 2.85V to 3.0V - factory-programmed for 3V systems; reprogrammable to ±0.1V precision using VP on WP pin. |
| RESET Assertion Validity | Down to VCC = 1V - ensures deterministic reset behavior during deep brownout or battery sag conditions. |
| Standby Current | <1µA with watchdog OFF - enables ultra-low-power operation in battery-backed or energy-harvesting applications. |
| I²C Interface Speed | 400kHz - compatible with standard-mode Fast-mode I²C buses; no external clock required. |
| EEPROM Endurance | 1,000,000 write cycles - guarantees long-term reliability for firmware parameter logging or calibration data storage. |
| EEPROM Data Retention | 100 years - maintains stored configuration across product lifetime without refresh. |
Pinout & Package
Package: 8-pin PDIP (Plastic Dual In-line Package), RoHS-compliant, through-hole mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | NC | No internal connection - must remain unconnected; no pull-up/down or routing required. |
| 3 | RESET | Active-low open-drain reset output - requires external pull-up resistor; asserts during power-up, brownout, or watchdog timeout. |
| 4 | VSS | Ground reference - common return path for all internal circuits and I²C bus termination. |
| 5 | SDA | Serial Data bidirectional I/O - open-drain interface; shares bus with other I²C devices; requires pull-up resistor. |
| 6 | SCL | Serial Clock input - synchronous timing signal generated by master MCU; defines I²C bit rate and sampling edge. |
| 7 | WP | Hardware write protect - HIGH disables all EEPROM and control register writes; LOW enables software-controlled protection. |
| 8 | VCC | Supply voltage input - powers all internal blocks including reset generator, watchdog, and EEPROM array. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable VTRIP | Factory-set at 2.85–3.0V; user-adjustable via high-voltage programming sequence on WP pin for ±0.1V tuning. |
| Block Lock™ EEPROM Protection | Eight configurable protection zones (none, 16–128 bytes, upper 1/4 to full array) controlled by nonvolatile BP2–BP0 bits. |
| Watchdog Timer Flexibility | Three selectable timeouts (200ms/600ms/1.4s) set via nonvolatile WD1/WD0 bits; disable option retained after power cycle. |
| Power-Fail Immunity | RESET remains asserted until VCC rises above VTRIP for 200ms - prevents spurious restarts during marginal supply recovery. |
| Direct Write™ EEPROM Cell | Guarantees 1M write cycles and 100-year data retention without wear leveling or external management. |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
Use Scenario: Microcontroller-based programmable logic controller operating in factory environments with fluctuating 3.3V rail. IC Role / Device Role / Timing Role: CPU supervisor providing brownout reset, watchdog supervision of firmware execution, and EEPROM storage of I/O configuration and fault logs. Use Value: Prevents erratic operation during line sags; enables field-updatable calibration data with 1M-cycle endurance; eliminates need for discrete reset IC + EEPROM. | Use Scenario: Portable ultrasound unit powered by Li-ion battery with voltage decay from 4.2V to 3.0V during discharge. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET when battery drops below 2.85V, while storing patient settings and calibration offsets in protected EEPROM. Use Value: Ensures safe shutdown before critical subsystem failure; retains clinical data across 100+ charge cycles without corruption. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: ANSI C12.20-compliant meter exposed to wide ambient temperatures (-40°C to +85°C) and conducted EMI. IC Role / Device Role / Timing Role: Supervisory IC monitoring 3.3V supply, detecting undervoltage events, and storing tariff schedules and tamper logs in EEPROM. Use Value: Meets stringent reset timing requirements under cold-start conditions; provides secure, lockable memory for regulatory audit trails. | Use Scenario: CAN-connected BCM managing door locks, lighting, and window controls in 12V automotive electrical system. IC Role / Device Role / Timing Role: Reset generator ensuring MCU initialization only after stable 3.3V LDO output; EEPROM stores user preferences and diagnostic trouble codes. Use Value: Guarantees robust startup after ignition cycling; enables recall of seat/mirror positions even after battery disconnect. |
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 |
|---|---|---|---|
| MAX6361LKA29+T | Fixed 2.93V reset threshold; no VTRIP programmability; 1kbit EEPROM; 2.7–5.5V supply. | Lacks field-adjustable trip point; smaller EEPROM limits configuration storage depth. | Select when precise 2.93V reset is sufficient and EEPROM capacity >1kbit is unnecessary. |
| STM8T142M2U6 | Integrated 8-bit MCU core; 2.5–5.5V; 2kbit EEPROM; fixed 2.9V reset; no watchdog timer. | Requires firmware development; no standalone watchdog supervision; lower EEPROM endurance (100k cycles). | Choose only if embedded processing capability is needed alongside supervision - not a drop-in replacement. |
Compared with MAX6361LKA29+T and STM8T142M2U6, the X4043PIZ-2.7A uniquely combines field-programmable VTRIP, 4kbit EEPROM with Block Lock™, and independent watchdog - making it optimal for systems requiring adaptive voltage monitoring and robust nonvolatile storage without MCU overhead.
Availability
X4043PIZ-2.7A is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and smart metering applications requiring stable component supply, extended temperature support (-40°C to +85°C), and long-lifecycle availability.
Supply support for X4043PIZ-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
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 X4043/X4045 family was designed to consolidate power supervision, watchdog safety, and nonvolatile memory into a single IC - reducing board space and improving system reliability in resource-constrained microcontroller applications.
FAQ
What is the reset output type and drive capability of the X4043PIZ-2.7A?
The X4043PIZ-2.7A features an active-low open-drain RESET output on Pin 3. It requires an external pull-up resistor to VCC and can sink ≥2mA at VCC = 3.3V with VOL ≤ 0.4V. This configuration allows wired-OR connection with other reset sources and compatibility with both 3.3V and 5V logic families.
Can the reset threshold voltage of the X4043PIZ-2.7A be changed after soldering?
Yes - the X4043PIZ-2.7A supports in-system VTRIP reprogramming using a 15–18V pulse applied to the WP pin while executing a defined I²C sequence. This allows field calibration to ±0.1V without removing the device, enabling compensation for board-level voltage tolerances or aging effects.
Does the X4043PIZ-2.7A support I²C multi-master arbitration?
No - the X4043PIZ-2.7A operates exclusively as an I²C slave device and does not implement multi-master arbitration logic. It responds only to its assigned slave addresses (0xA0 for EEPROM, 0xB0 for control register) and relies on the master MCU to manage bus contention.
How is EEPROM write protection implemented on the X4043PIZ-2.7A?
The X4043PIZ-2.7A implements dual-layer EEPROM protection: hardware-level via the WP pin (HIGH disables all writes), and software-level via three nonvolatile BP2–BP0 bits that configure eight distinct lock zones - from 16 bytes to full 4kbit array - each independently enforceable without WP assertion.
What is the maximum watchdog timeout period supported by the X4043PIZ-2.7A?
The X4043PIZ-2.7A supports a maximum watchdog timeout period of 1.4 seconds, selected by setting WD1=0 and WD0=0 in the control register. This value is nonvolatile and persists across power cycles unless explicitly rewritten - providing fail-safe supervision for slow-executing firmware tasks.
X4043PIZ-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
X4043PIZ-2.7A FAQ
1.How can I place an order for X4043PIZ-2.7A through Aetrix?
Please submit a Request for Quotation (RFQ) for X4043PIZ-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 X4043PIZ-2.7A reliable?
The price and inventory of X4043PIZ-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 X4043PIZ-2.7A is usually 5 days.
3.What payment methods are accepted for X4043PIZ-2.7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4043PIZ-2.7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4043PIZ-2.7A?
X4043PIZ-2.7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4043PIZ-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 X4043PIZ-2.7A?
For technical support, including X4043PIZ-2.7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4043PIZ-2.7A requirements.
6.How does Aetrix verify that X4043PIZ-2.7A is sourced from the original manufacturer or authorized distributors?
All X4043PIZ-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 X4043PIZ-2.7A meets industry standards.
7.What is the process for return or replacement of X4043PIZ-2.7A?
All X4043PIZ-2.7A units undergo pre-shipment inspection (PSI). If there is an issue with X4043PIZ-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 X4043PIZ-2.7A part is unused and in its original packaging.
Return procedure for X4043PIZ-2.7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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