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Renesas X4043PZ-4.5A
- Part No.:
- X4043PZ-4.5A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X4043PZ-4.5A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,712
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Product details
Overview
X4043PZ-4.5A 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 reset threshold, 400kHz I²C interface, <20µA standby current (watchdog on), and operates from 2.7V to 5.5V. It is used in microcontroller-based embedded systems requiring reliable power sequencing and nonvolatile configuration storage.
For engineers reviewing the X4043PZ-4.5A datasheet, X4043PZ-4.5A pinout, X4043PZ-4.5A application, or X4043PZ-4.5A equivalent, key selection considerations include its fixed 4.5V reset threshold, 8-pin PDIP package, EEPROM block-lock granularity, watchdog timeout options (200ms/600ms/1.4s), and compatibility with standard I²C bus timing.
Technical Context
The X4043PZ-4.5A implements a dedicated low-voltage detection circuit that asserts RESET when VCC drops below 4.5V and holds it active until VCC rises above 4.5V for 200ms. Its watchdog timer monitors SDA/SCL activity and triggers reset if no valid I²C transaction occurs within the selected timeout interval.
Internally, it combines a 512 × 8-bit EEPROM array using Direct Write™ cells (1M write cycles, 100-year retention) with nonvolatile control register bits for watchdog period and block lock configuration. The device uses an open-drain RESET output requiring external pull-up and supports software-controlled VTRIP reprogramming via high-voltage WP pin sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.5–4.75V - guarantees system reset before microcontroller enters undefined operation during brownout. |
| Supply Voltage Range | 2.7V to 5.5V - supports wide-input industrial and legacy 5V logic systems. |
| I²C Interface Speed | 400kHz - enables fast configuration reads/writes without compromising bus timing margins. |
| EEPROM Capacity | 4kbit (512 × 8) - stores calibration data, device ID, or firmware flags across multiple independent blocks. |
| Standby Current | <20µA (watchdog on) - minimizes quiescent power in battery-backed or energy-sensitive applications. |
| Power-On Reset Pulse | 250ms minimum - ensures stable clock and power rail settling before processor release. |
| Watchdog Timeout Options | 200ms / 600ms / 1.4s - selectable via nonvolatile control bits to match host firmware execution timing. |
Pinout & Package
Package: 8-pin PDIP (Plastic Dual In-line Package), RoHS-compliant, Pb-free plus anneal finish. Pin 1 and Pin 2 are NC (no internal connection); Pin 3 is active-low open-drain RESET output requiring external pull-up resistor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | NC | No internal connection - must be left unconnected or tied to ground per layout best practice. |
| 3 | RESET | Active-low open-drain reset output - asserts during power-up, brownout, or watchdog timeout; requires external pull-up to VCC. |
| 4 | VSS | Ground reference - serves as return path for all internal circuits and I²C bus termination. |
| 5 | SDA | Serial Data bidirectional I²C line - open-drain structure allows wire-OR with other slaves; requires external pull-up. |
| 6 | SCL | Serial Clock input - controls all I²C timing; driven only by master; no internal pull-up. |
| 7 | WP | Write Protect input - HIGH disables all writes including EEPROM and control register; LOW enables write operations. |
| 8 | VCC | Supply voltage input - powers all internal functions including reset comparator, watchdog, and EEPROM core. |
Key Features
| Feature | Design Value |
|---|---|
| Block Lock™ EEPROM Protection | Configurable lock of 0/16/32/64/128 bytes or 1/4/1/2/all array - prevents accidental overwrites of critical calibration or security data. |
| Reprogrammable VTRIP | Voltage threshold adjustable via high-voltage WP sequence - enables field tuning to match precise system rail tolerances. |
| Self-Timed EEPROM Writes | 5ms typical write cycle - eliminates need for external timing control; host can poll ACK to detect completion. |
| Power-Up/Down Write Protection | Automatic disable of writes when VCC < VTRIP - prevents corruption during power ramping or failure events. |
| Three Watchdog Timeout Settings | 200ms, 600ms, or 1.4s - nonvolatile selection allows matching to host firmware loop timing without runtime overhead. |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
Use Scenario: Microcontroller-based programmable logic controller monitoring sensors and driving relays in factory automation. IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset, brownout detection, and watchdog supervision; EEPROM stores I/O configuration and calibration offsets. Use Value: Prevents erratic behavior during line fluctuations and ensures deterministic startup; Block Lock™ protects stored calibration from firmware update errors. | Use Scenario: Portable ultrasound or ECG unit with battery backup and safety-critical boot integrity requirements. IC Role / Device Role / Timing Role: System-level supervisor asserting reset if main MCU hangs or supply dips below 4.5V; EEPROM retains patient-specific settings and device serial number. Use Value: Meets IEC 62304 safety requirements for reset reliability; 100-year EEPROM retention ensures lifetime data integrity without refresh. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: ANSI C12.20-compliant electricity meter operating across wide temperature and voltage ranges. IC Role / Device Role / Timing Role: Supervises 5V rail derived from AC-DC converter; EEPROM stores tariff tables and metering logs with write-protection against tampering. Use Value: Fixed 4.5V reset threshold aligns with utility-grade brownout immunity specs; Block Lock™ prevents unauthorized modification of billing parameters. | Use Scenario: CAN-connected BCM managing door locks, lighting, and window motors in passenger vehicles. IC Role / Device Role / Timing Role: Resets microcontroller during ignition cycling or load-dump transients; EEPROM stores user preferences (e.g., mirror position, seat memory). Use Value: 2.7–5.5V operation accommodates automotive battery swing (8V–16V with regulator); <20µA standby current extends battery life in sleep mode. |
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 functionality and electrical specs; 8-pin MSOP package instead of PDIP; RoHS-compliant Pb-free plus anneal finish. | Surface-mount assembly required; smaller footprint; higher thermal performance; not through-hole compatible. | Select when migrating to SMT production or space-constrained PCB layouts. |
| X4043S8Z-4.5A | Identical function and pinout; 8-pin SOIC package; same 4.5–4.75V VTRIP; RoHS-compliant Pb-free plus anneal finish. | Standard surface-mount option; widely available; compatible with automated pick-and-place; no lead bending required. | Select for new designs targeting mainstream SMT manufacturing and long-term supply stability. |
Compared with X4043PZ-4.5A, the X4043M8Z-4.5A and X4043S8Z-4.5A offer identical supervision logic, EEPROM architecture, and I²C interface but replace the legacy PDIP package with modern MSOP and SOIC footprints-enabling higher-density layouts, improved manufacturability, and continued availability beyond PDIP end-of-life.
Availability
X4043PZ-4.5A is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic devices, smart energy meters, automotive body control modules, and battery-powered instrumentation requiring stable component supply and long-lifecycle support.
Supply support for X4043PZ-4.5A 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 Corporation (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.
The X4043/X4045 product line was designed to consolidate power-on reset, watchdog, voltage monitoring, and EEPROM into a single die-reducing board area, BOM count, and system-level reliability risk in resource-constrained microcontroller applications.
FAQ
What is the reset behavior of the X4043PZ-4.5A during power-up?
The X4043PZ-4.5A asserts its active-low RESET output for a minimum of 250ms after VCC stabilizes above 4.5V. This ensures oscillator and power supply settling before releasing the microcontroller. The reset remains active until VCC exceeds the 4.5–4.75V trip point for 200ms, guaranteeing clean startup even under slow-ramp conditions. This behavior is hardwired and does not require configuration.
Can the X4043PZ-4.5A's reset threshold voltage be adjusted?
Yes, the X4043PZ-4.5A supports VTRIP reprogramming using a high-voltage pulse (15–18V) applied to the WP pin during an I²C command sequence. This allows fine-tuning the 4.5V nominal threshold to meet custom system tolerances. The procedure is documented in the FN8118 datasheet and does not affect EEPROM data integrity.
Does the X4043PZ-4.5A support I²C multi-master bus configurations?
Yes, the X4043PZ-4.5A fully complies with standard I²C protocol, including arbitration and clock stretching. Its open-drain SDA and SCL pins allow seamless integration into multi-master buses. However, the watchdog timer monitors SDA/SCL transitions globally - any master activity resets the timeout, so coexistence requires coordinated bus usage.
What EEPROM protection mechanisms does the X4043PZ-4.5A provide?
The X4043PZ-4.5A implements three layers: (1) hardware WP pin - HIGH disables all writes; (2) Block Lock™ - configurable lock of 16–512 bytes or full array via nonvolatile BP bits; (3) power-fail protection - automatic write disable when VCC falls below VTRIP. These prevent corruption during brownouts, firmware bugs, or physical tampering.
Is the X4043PZ-4.5A still in active production?
No - the X4043PZ-4.5A is marked "No longer available" in the official ordering table, with X4043M8Z-4.5A recommended as its direct replacement. Aetrix Electronics maintains legacy inventory and provides migration support, but new designs should use the MSOP or SOIC variants for guaranteed long-term supply and RoHS compliance.
X4043PZ-4.5A 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:
- 4.62V
- 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-4.5A FAQ
1.How can I place an order for X4043PZ-4.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for X4043PZ-4.5A 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-4.5A reliable?
The price and inventory of X4043PZ-4.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X4043PZ-4.5A is usually 5 days.
3.What payment methods are accepted for X4043PZ-4.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4043PZ-4.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4043PZ-4.5A?
X4043PZ-4.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4043PZ-4.5A 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-4.5A?
For technical support, including X4043PZ-4.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4043PZ-4.5A requirements.
6.How does Aetrix verify that X4043PZ-4.5A is sourced from the original manufacturer or authorized distributors?
All X4043PZ-4.5A 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-4.5A meets industry standards.
7.What is the process for return or replacement of X4043PZ-4.5A?
All X4043PZ-4.5A units undergo pre-shipment inspection (PSI). If there is an issue with X4043PZ-4.5A, 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-4.5A part is unused and in its original packaging.
Return procedure for X4043PZ-4.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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