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Renesas X4043PIZ-2.7
- Part No.:
- X4043PIZ-2.7
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X4043PIZ-2.7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,914
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Product details
Overview
X4043PIZ-2.7 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. It is used in embedded microcontroller systems requiring reliable brownout detection and nonvolatile configuration storage.
For engineers reviewing the X4043PIZ-2.7 datasheet, X4043PIZ-2.7 pinout, X4043PIZ-2.7 application, or X4043PIZ-2.7 equivalent, key selection criteria include its -40°C to +85°C industrial temperature range, 2.85–3.0V reset threshold, 8-pin PDIP package, EEPROM block-lock granularity (16–128 bytes), and programmable VTRIP capability for precision voltage monitoring.
Technical Context
The X4043PIZ-2.7 implements a dual-function reset architecture: power-on reset with 250ms delay and low-VCC detection with 200ms hysteresis, both driving the open-drain RESET output. Its watchdog timer monitors SDA/SCL activity and offers three timeout options (200ms/600ms/1.4s) set via nonvolatile WD1/WD0 bits in the control register.
It embeds a 512 × 8-bit EEPROM array using Direct Write™ technology (1M write cycles, 100-year retention), accessed via standard I²C protocol with slave address 0xA0 (array) or 0xB0 (control register). Block Lock™ protection is controlled by BP2–BP0 bits, enabling selective write lock of 16-byte to full-array segments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 5.5V - supports single-supply operation across wide industrial rail voltages. |
| Reset Threshold (VTRIP) | 2.85V to 3.0V - factory-programmed trip point for reliable brownout detection at 3V systems. |
| RESET Output | Active-low, open-drain - requires external pull-up; remains valid down to VCC = 1V for fail-safe assertion. |
| EEPROM Capacity | 4kbit (512 × 8) - sufficient for bootloader flags, calibration data, or device configuration in resource-constrained MCUs. |
| I²C Interface | 400kHz max - compatible with standard Fast-mode I²C buses without clock stretching overhead. |
| Standby Current | <1µA (watchdog OFF) - enables ultra-low-power operation in battery-backed or energy-harvesting systems. |
| Watchdog Timeout | Selectable: 200ms / 600ms / 1.4s - configurable via nonvolatile control register for diverse MCU recovery timing needs. |
Pinout & Package
Package: 8-pin PDIP (Plastic Dual In-line Package), RoHS-compliant, through-hole mountable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 NC | No internal connection | Unused pins; must be left floating or tied to GND per layout best practice. |
| 3 RESET | Active-low reset output | Open-drain signal asserted during power-up, brownout, or watchdog timeout; requires external pull-up resistor. |
| 4 VSS | Ground reference | Primary return path for all internal circuits; connect directly to system ground plane. |
| 5 SDA | Serial data I/O | Bidirectional I²C data line with open-drain output; shared bus line requiring pull-up. |
| 6 SCL | Serial clock input | Master-generated clock controlling all I²C read/write timing; no internal pull-up. |
| 7 WP | Write protect input | High-level logic disables all writes (EEPROM + control register); tie to VSS when unused. |
| 8 VCC | Power supply input | Primary supply for all functions; decoupling capacitor (0.1µF) required adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable VTRIP | Factory-set 2.85–3.0V threshold can be reprogrammed to custom voltage (1.7V–5.5V) using VP on WP pin - enables precise brownout tuning without external components. |
| Block Lock™ Protection | Eight configurable lock modes (0–128 bytes or full array) controlled by nonvolatile BP2–BP0 bits - prevents accidental firmware corruption during field updates. |
| Self-timed EEPROM Writes | 5ms typical write cycle with automatic internal timing - eliminates need for host-side write-delay polling or timeout management. |
| Power-Up/Down Write Protection | Automatic disable of all writes when VCC < VTRIP or during power transitions - guarantees data integrity during supply instability. |
| Watchdog Timer Independence | Monitors SDA/SCL state transitions (not software commands) - detects frozen I²C bus or MCU lockup even if firmware halts communication. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Real-time control system subject to voltage sags during motor switching or EMI events. IC Role / Device Role / Timing Role: CPU supervisor providing brownout reset and watchdog supervision for ARM Cortex-M4 MCU. Use Value: Prevents erratic MCU behavior during 2.9V dips by asserting RESET within 10µs of VCC crossing 2.85V threshold. | Use Scenario: Battery-powered infusion device requiring tamper-proof calibration storage and safety-critical reset assurance. IC Role / Device Role / Timing Role: Nonvolatile configuration manager and fail-safe reset generator for safety-certified MCU. Use Value: Stores pump calibration constants in protected EEPROM blocks and guarantees reset assertion down to 1V during battery depletion. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: 12V-to-3.3V powered module exposed to load-dump transients and cold-crank undervoltage. IC Role / Device Role / Timing Role: Voltage supervisor and watchdog co-processor for CAN-enabled microcontroller. Use Value: Maintains functional safety by holding RESET active until VCC stabilizes >200ms above 2.85V after cold-crank recovery. | Use Scenario: Revenue-grade meter operating on supercapacitor backup during AC mains failure. IC Role / Device Role / Timing Role: Low-power supervisor preserving critical metering registers during brownout. Use Value: Draws only 0.8µA in watchdog-OFF standby mode, extending supercapacitor hold-up time by >15% versus alternatives. |
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 |
|---|---|---|---|
| MAX6373US29+T | Fixed 2.93V reset threshold; no VTRIP programming; 1kbit EEPROM; 100µA standby current. | Lacks field-adjustable trip point and high endurance EEPROM - suitable only for fixed-threshold designs with minimal nonvolatile storage needs. | Select when design requires guaranteed drop-in replacement with no firmware changes and lower cost is prioritized over flexibility. |
| STM8T142M2U6 | Integrated 2.5kbit EEPROM; 2.85V reset; 1.5µA standby; but no I²C interface - uses dedicated reset pin and SPI for memory access. | Requires separate SPI bus and additional GPIO; not pin-compatible; lacks Block Lock™ granularity - increases PCB routing complexity. | Choose when MCU already has SPI bandwidth available and board space constraints favor integrated solution over discrete supervisor + memory. |
Compared with MAX6373US29+T and STM8T142M2U6, the X4043PIZ-2.7 uniquely combines field-programmable VTRIP, 4kbit EEPROM with byte-level block locking, and sub-1µA watchdog-OFF current in an industry-standard 8-pin PDIP - making it optimal for upgradeable, safety-critical, and ultra-low-power embedded systems.
Availability
X4043PIZ-2.7 is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, automotive body electronics, and smart metering applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole packaging.
Supply support for X4043PIZ-2.7 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 solutions for industrial, computing, and communications markets.
The X4043/X4045 family was designed to consolidate power supervision, watchdog, and nonvolatile memory functions into a single IC - reducing BOM count and improving system reliability in microcontroller-based control systems.
FAQ
What is the reset threshold voltage for X4043PIZ-2.7?
The X4043PIZ-2.7 is factory-programmed with a nominal reset threshold (VTRIP) of 2.85V to 3.0V, optimized for 3V systems. This value is verified per the ordering information table in FN8118 Rev 3.00, which explicitly lists X4043PIZ-2.7A as having VTRIP range 2.85–3.0V. The threshold is reprogrammable using the VP pulse method described on pages 5–7 of the datasheet, allowing field adjustment for tighter tolerances.
Does X4043PIZ-2.7 support I²C communication at 400kHz?
Yes, X4043PIZ-2.7 supports Fast-mode I²C up to 400kHz, as confirmed in the FEATURES section (page 1) and SERIAL INTERFACE section (page 10) of FN8118 Rev 3.00. It uses standard I²C protocol with slave address 0xA0 for EEPROM access and 0xB0 for control register access, and includes built-in acknowledge polling to manage write-cycle timing.
What is the EEPROM endurance and data retention for X4043PIZ-2.7?
The X4043PIZ-2.7 EEPROM provides minimum endurance of 1,000,000 write cycles and minimum data retention of 100 years, enabled by Intersil's proprietary Direct Write™ cell technology. These specifications are stated on page 4 of FN8118 Rev 3.00 under "The memory portion of the device" and confirmed in the FEATURES list on page 1.
Can the watchdog timeout period be changed on X4043PIZ-2.7?
Yes, the watchdog timeout period on X4043PIZ-2.7 is user-selectable via nonvolatile WD1/WD0 bits in the control register (address 1FFh). Three options are supported: 200ms, 600ms, or 1.4s - with factory default set to disabled (WD1=WD0=1). Configuration requires a three-step write sequence involving WEL and RWEL latches, as detailed on pages 8–9 of FN8118 Rev 3.00.
Is X4043PIZ-2.7 pin-compatible with other packages in the X4043/X4045 family?
No - X4043PIZ-2.7 uses an 8-pin PDIP package with specific pinout (NC/NC/RESET/VSS/SDA/SCL/WP/VCC), while SOIC and MSOP variants share identical pin functions but differ in physical dimensions and thermal characteristics. The datasheet confirms pin compatibility *within* package types (e.g., all SOIC variants use same pin mapping), but PDIP is electrically identical yet mechanically distinct from SOIC/MSOP - requiring separate PCB footprints.
X4043PIZ-2.7 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:
- 2.62V
- 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-2.7 FAQ
1.How can I place an order for X4043PIZ-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X4043PIZ-2.7 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-2.7 reliable?
The price and inventory of X4043PIZ-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X4043PIZ-2.7 is usually 5 days.
3.What payment methods are accepted for X4043PIZ-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4043PIZ-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4043PIZ-2.7?
X4043PIZ-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4043PIZ-2.7 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-2.7?
For technical support, including X4043PIZ-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4043PIZ-2.7 requirements.
6.How does Aetrix verify that X4043PIZ-2.7 is sourced from the original manufacturer or authorized distributors?
All X4043PIZ-2.7 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-2.7 meets industry standards.
7.What is the process for return or replacement of X4043PIZ-2.7?
All X4043PIZ-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X4043PIZ-2.7, 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-2.7 part is unused and in its original packaging.
Return procedure for X4043PIZ-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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