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Renesas X4043PZ-2.7
- Part No.:
- X4043PZ-2.7
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X4043PZ-2.7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,618
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Product details
Overview
X4043PZ-2.7 from Intersil is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 4kbit serial 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 <20µA standby current with watchdog enabled - used in embedded microcontroller systems requiring reliable brownout recovery and nonvolatile configuration storage.
For engineers reviewing the X4043PZ-2.7 datasheet, X4043PZ-2.7 pinout, X4043PZ-2.7 application, or X4043PZ-2.7 equivalent, key selection considerations include its 2.85–3.0V reset threshold range, 8-pin PDIP package, 200ms reset timeout, EEPROM page-write capability, and programmable VTRIP voltage for precision supply monitoring in space-constrained industrial controllers.
Technical Context
The X4043PZ-2.7 implements a dual-function reset architecture: power-on reset holds RESET active for 250ms after VCC stabilization, while low-VCC detection asserts RESET when VCC drops below 2.85–3.0V and sustains it until VCC exceeds VTRIP 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 control register bits WD1/WD0.
Internally, the device integrates a 512 × 8-bit EEPROM array using Direct Write™ technology (1M write cycles, 100-year data retention), block-lock protection controlled by BP2–BP0 bits, and a 2-wire I²C-compatible interface with open-drain SDA/SCL, active-low open-drain RESET output, and hardware WP pin for full-array write inhibition.
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 3.0V nominal systems; reprogrammable to ±0.1V precision via high-voltage WP sequence. |
| Reset Timeout (tPURST) | 250ms (power-on), 200ms (brownout recovery) - ensures stable oscillator startup and FPGA configuration before processor release. |
| EEPROM Capacity | 4kbits (512 × 8) - organized as 16-byte pages; enables firmware versioning, calibration data, and device ID storage in compact footprint. |
| I²C Interface Speed | 400kHz - compatible with standard Fast-mode I²C buses; supports byte and page writes with self-timed 5ms typical write cycle. |
| Standby Current | <20µA (watchdog on), <1µA (watchdog off) - extends battery life in always-on monitoring nodes and portable instrumentation. |
| Watchdog Timeout Options | 200ms / 600ms / 1.4s - configurable via nonvolatile WD1/WD0 bits; prevents runaway code without software intervention. |
Pinout & Package
Package: 8-pin PDIP (Plastic Dual In-line Package), RoHS-compliant, Pb-free plus anneal finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | NC | No internal connection - must be left unconnected; not bonded or functional. |
| 3 | RESET | Active-low open-drain reset output - requires external pull-up; asserts during power-up, brownout, or watchdog timeout. |
| 4 | VSS | Ground reference - common return path for all internal circuits and I²C bus. |
| 5 | SDA | Serial Data bidirectional I²C line - open-drain, requires external pull-up; carries address, command, and data. |
| 6 | SCL | Serial Clock input - master-generated clock synchronizing all I²C transfers; edge-triggered timing. |
| 7 | WP | Hardware write protect - HIGH disables all EEPROM and control register writes; LOW enables programming sequences. |
| 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; adjustable ±0.1V via 15–18V pulse on WP pin - eliminates need for external resistor dividers in precision supply monitoring. |
| Block Lock™ EEPROM Protection | Eight protection modes (0 to 128 bytes, 1/4 to full array) controlled by nonvolatile BP2–BP0 bits - prevents accidental overwrites of critical calibration or boot code. |
| Direct Write™ EEPROM Cell | 1,000,000 write cycles minimum, 100-year data retention - enables field-updatable parameters in industrial PLCs and medical devices. |
| Power-Fail Immunity | RESET remains valid down to VCC = 1V - guarantees clean shutdown and prevents partial EEPROM writes during catastrophic brownout. |
| Watchdog Independence | Monitors SDA/SCL transitions only - immune to software hangs that freeze I²C peripherals but leave bus idle. |
Applications
| Industrial PLC Controller | Medical Sensor Module |
|---|---|
Use Scenario: Compact programmable logic controller operating from 3.3V rail with real-time fault logging and firmware update capability. IC Role / Device Role / Timing Role: CPU supervisor providing brownout reset, watchdog safety net, and EEPROM storage for ladder logic versions and calibration offsets. Use Value: Eliminates discrete reset IC + external EEPROM, reducing BOM count by two components while ensuring deterministic reset behavior during mains dips. |
Use Scenario: Portable blood glucose meter requiring tamper-proof calibration storage and fail-safe power sequencing. IC Role / Device Role / Timing Role: System-level supervisor asserting RESET during battery voltage sag and preserving sensor offset data in EEPROM across 10,000+ measurement cycles. Use Value: Block Lock™ prevents unauthorized recalibration; 1V reset validity ensures EEPROM write completion even during final battery discharge. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: DIN-rail mounted electricity meter with time-of-use tariff storage and tamper-detection event logging. IC Role / Device Role / Timing Role: Supervisory hub managing power-on initialization, detecting undervoltage events, and storing billing data in protected EEPROM sectors. Use Value: Programmable VTRIP aligns precisely with 3.3V LDO dropout threshold; 200ms brownout hold-off prevents spurious resets during transient grid fluctuations. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting powered from vehicle 12V system via 3.3V regulator. IC Role / Device Role / Timing Role: Reset manager asserting RESET during cold-crank voltage drop (<6V) and safeguarding EEPROM-stored user preferences against corruption. Use Value: Active-low open-drain RESET interfaces directly with MCU's dedicated reset pin; WP pin hardwired to ground enables field updates without hardware modification. |
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 |
|---|---|---|---|
| MAX6361KA29+T | Fixed 2.93V reset threshold; no VTRIP programmability; 1kbit EEPROM; SOIC-8 only | Lacks field-adjustable trip point and smaller memory - suitable for cost-sensitive designs where threshold tolerance ±2% is acceptable | Select when board layout already uses SOIC-8 and precise VTRIP tuning is unnecessary |
| STM8T142M2U6 | Integrated 8-bit MCU core; 2k EEPROM; 2.9V fixed reset; TSSOP-20 package | Replaces standalone supervisor with programmable microcontroller - adds firmware-based watchdog logic and custom reset sequencing | Choose when system requires autonomous fault response beyond hardware reset assertion |
Compared with MAX6361KA29+T and STM8T142M2U6, the X4043PZ-2.7 uniquely combines field-programmable VTRIP, 4kbit EEPROM with granular block lock, and PDIP packaging - making it optimal for legacy industrial designs requiring mechanical compatibility and precision supply margining.
Availability
X4043PZ-2.7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical sensor modules, smart energy meters, automotive body control units, and embedded instrumentation requiring stable component supply with long-term lifecycle support.
Supply support for X4043PZ-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 ICs for industrial, communications, and computing markets.
The X4043/X4045 family was designed to consolidate power supervision, watchdog safety, and nonvolatile storage into a single IC - targeting cost-sensitive, space-constrained embedded systems needing high reliability without software overhead.
FAQ
What is the reset behavior of the X4043PZ-2.7 during power-up and brownout conditions?
The X4043PZ-2.7 asserts active-low RESET for 250ms after power-up to allow VCC and oscillator stabilization. During brownout, it holds RESET active whenever VCC falls below its 2.85–3.0V threshold and maintains assertion until VCC rises above VTRIP for 200ms. RESET remains valid down to VCC = 1V, preventing partial EEPROM writes during deep undervoltage events. This behavior is fully hardware-implemented and requires no MCU intervention.
Can the reset threshold voltage (VTRIP) of the X4043PZ-2.7 be adjusted, and how is it done?
Yes, the X4043PZ-2.7 supports field programming of VTRIP using a 15–18V pulse applied to the WP pin while issuing specific I²C commands (slave address A0h, byte address 01h). The procedure allows adjustment within ±0.1V of the factory 2.85–3.0V setting. A separate reset sequence (address 03h) is required before lowering VTRIP. This capability enables precise alignment with system LDO dropout thresholds without external components.
How does the watchdog timer in the X4043PZ-2.7 operate, and what timeout options are available?
The X4043PZ-2.7 watchdog monitors SDA and SCL pin transitions - a valid I²C start/stop sequence resets the timer. Timeout is set via nonvolatile WD1/WD0 bits to 200ms, 600ms, or 1.4s; "disabled" is the factory default. Unlike software-based watchdogs, this hardware timer remains active even if the MCU freezes mid-transaction, providing independent failure detection without firmware dependency.
What EEPROM protection mechanisms does the X4043PZ-2.7 provide, and how are they configured?
The X4043PZ-2.7 implements three-tiered EEPROM protection: hardware WP pin (global disable), power-fail lock (automatic write abort below VTRIP), and Block Lock™ via BP2–BP0 bits. These bits configure eight protection modes - from 16-byte pages to full-array lock - stored nonvolatily in the control register. Configuration requires a three-step I²C write sequence (WEL → RWEL → data) and persists across power cycles.
Is the X4043PZ-2.7 pin-compatible with other members of the X4043/X4045 family, and what package options exist?
The X4043PZ-2.7 uses an 8-pin PDIP package and shares identical pinout and function mapping with all X4043/X4045 variants (SOIC-8, MSOP-8, PDIP-8). However, it is not pin-compatible with X4045-series parts due to active-high RESET output versus X4043's active-low RESET. For direct replacement in existing PDIP layouts, X4043PZ-2.7A is the recommended ordering variant per Intersil's documentation.
X4043PZ-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
X4043PZ-2.7 FAQ
1.How can I place an order for X4043PZ-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X4043PZ-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 X4043PZ-2.7 reliable?
The price and inventory of X4043PZ-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 X4043PZ-2.7 is usually 5 days.
3.What payment methods are accepted for X4043PZ-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4043PZ-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4043PZ-2.7?
X4043PZ-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4043PZ-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 X4043PZ-2.7?
For technical support, including X4043PZ-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4043PZ-2.7 requirements.
6.How does Aetrix verify that X4043PZ-2.7 is sourced from the original manufacturer or authorized distributors?
All X4043PZ-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 X4043PZ-2.7 meets industry standards.
7.What is the process for return or replacement of X4043PZ-2.7?
All X4043PZ-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X4043PZ-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 X4043PZ-2.7 part is unused and in its original packaging.
Return procedure for X4043PZ-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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