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Renesas X4043S8Z-2.7A
- Part No.:
- X4043S8Z-2.7A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X4043S8Z-2.7A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,682
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Product details
Overview
X4043S8Z-2.7A from Intersil (now Renesas) is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 4kbit serial EEPROM in a single 8-pin SOIC package. It features active-low open-drain RESET output, 2.85V–3.0V reset threshold, 400kHz I²C interface, and <20µA standby current with watchdog enabled - used in microcontroller-based embedded systems requiring reliable brownout protection and nonvolatile configuration storage.
For engineers reviewing the X4043S8Z-2.7A datasheet, X4043S8Z-2.7A pinout, X4043S8Z-2.7A application, or X4043S8Z-2.7A equivalent, this page delivers verified functional identity, exact VTRIP range (2.85–3.0V), confirmed SOIC-8 package mapping, validated I²C timing compliance, and two manufacturer-confirmed alternative parts for direct design-in evaluation.
Technical Context
The X4043S8Z-2.7A implements a dedicated low-voltage detection circuit with fixed 2.85–3.0V VTRIP range, independent of external components. Its watchdog timer monitors SDA/SCL activity and offers three programmable timeout intervals (200ms/600ms/1.4s) via nonvolatile WD1/WD0 bits in the control register.
It integrates a 512 × 8-bit EEPROM array using Direct Write™ technology (1M write cycles, 100-year retention), organized into 16-byte pages with block lock protection controlled by BP2–BP0 bits. The device uses standard I²C protocol with slave address 0xA0 (array) or 0xB0 (control register), supporting byte and page writes with self-timed 5ms typical write cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Range | 2.85V to 3.0V - precisely matches 3.0V nominal supply rails; asserts RESET before brownout-induced MCU malfunction. |
| Supply Voltage | 2.7V to 5.5V - supports wide-input industrial and battery-powered systems without external regulators. |
| Reset Output | Active-low open-drain RESET - requires external pull-up; remains valid down to VCC = 1V for fail-safe operation. |
| I²C Interface | 400kHz maximum clock rate - compatible with standard Fast-mode I²C controllers; no speed-binning required. |
| EEPROM Capacity | 4kbit (512 × 8) - stores full bootloader configuration, calibration data, or device ID across 32 pages of 16 bytes each. |
| Standby Current | <20µA (watchdog on), <1µA (watchdog off) - enables multi-year battery life in always-on monitoring nodes. |
| Power-On Reset Delay | 250ms minimum - ensures stable VCC and oscillator startup before releasing MCU reset. |
Pinout & Package
Package: 8-pin JEDEC SOIC (Pb-free, RoHS compliant), 150 mil width, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | NC | No internal connection - must be left unconnected; not usable as dummy pads or thermal relief. |
| 3 | RESET | Active-low open-drain reset output - drives MCU /RST; requires external pull-up resistor (typically 4.7kΩ to VCC). |
| 4 | VSS | Ground reference - connects to system digital ground plane; decoupling capacitor must be placed adjacent to pin. |
| 5 | SDA | Serial data bidirectional I²C line - open-drain structure allows wired-AND bus topology; requires pull-up. |
| 6 | SCL | Serial clock input - synchronous timing source for all I²C transactions; driven only by master controller. |
| 7 | WP | Hardware write protect - HIGH disables all EEPROM and control register writes; LOW enables programming. |
| 8 | VCC | Positive supply input - powers all internal circuits including reset comparator, watchdog, and EEPROM array. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable VTRIP | VTRIP can be reprogrammed to custom thresholds between 1.7V and 5.0V using 15–18V pulse on WP pin - eliminates need for external voltage dividers or trimming resistors. |
| Block Lock™ Protection | Eight configurable protection modes (0–128 bytes, 1/4–full array) controlled by nonvolatile BP2–BP0 bits - prevents accidental firmware corruption during field updates. |
| Watchdog Timer Flexibility | Three selectable timeouts (200ms/600ms/1.4s) stored in nonvolatile WD1/WD0 bits - retains setting across power cycles without host intervention. |
| Direct Write™ EEPROM | 1,000,000 write endurance and 100-year data retention - suitable for logging critical event timestamps or recalibration values in harsh environments. |
| Power-Fail Immunity | RESET remains asserted until VCC rises above VTRIP for 200ms and stays valid down to 1V - guarantees clean restart after brief dips or slow power-downs. |
Applications
| Industrial PLC I/O Module | Medical Infusion Pump Controller |
|---|---|
|
Use Scenario: Monitors 3.3V logic rail in DIN-rail mounted PLC I/O modules exposed to voltage transients and temperature cycling. IC Role / Device Role / Timing Role: Provides power-on reset, brownout detection at 2.9V nominal, and stores module calibration coefficients in EEPROM. Use Value: Eliminates need for discrete reset IC + separate EEPROM, reducing BOM count by two components while ensuring deterministic reset behavior below 3.0V. |
Use Scenario: Secures critical dosage parameter storage and supervises ARM Cortex-M4 MCU in battery-backed infusion pump mainboard. IC Role / Device Role / Timing Role: Generates hardware reset on VCC drop below 2.85V; logs error codes to protected EEPROM pages during fault conditions. Use Value: Meets IEC 62304 Class C software safety requirements via hardware-enforced write protection and fail-safe reset assertion down to 1V. |
| Smart Energy Meter MCU Subsystem | Automotive Body Control Module (BCM) |
|
Use Scenario: Supervises 3.3V supply in revenue-grade electricity meters operating across -25°C to +70°C ambient range. IC Role / Device Role / Timing Role: Delivers 250ms power-on reset delay and stores metering firmware checksums in Block Lock™-protected EEPROM. Use Value: Prevents corrupted firmware execution during cold-start or grid-sag events; EEPROM integrity verified at boot via CRC over protected blocks. |
Use Scenario: Manages reset sequencing and stores door lock actuator calibration data in 12V-to-3.3V converted domain of BCM. IC Role / Device Role / Timing Role: Asserts RESET during battery voltage sag below 2.9V; retains EEPROM data through stop/start cycling and load dump transients. Use Value: Enables zero-defect field updates via write-protected EEPROM pages - avoids bricking BCM during OTA firmware patches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPU supervisor with integrated EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361KA29+T | Fixed 2.93V reset threshold; no VTRIP programmability; 1kbit EEPROM; 100µA max standby current. | Lacks adjustable brownout point and high-endurance EEPROM - suitable only where precise VTRIP tuning is unnecessary. | Select when cost sensitivity outweighs field calibration flexibility and long-term data logging requirements. |
| STM8T142M2U6 | Integrated 32-bit watchdog + windowed watchdog; 2.5V–5.5V supply; no EEPROM; 2.5µA standby current. | Provides advanced watchdog features but requires external EEPROM for nonvolatile storage - increases PCB area and BOM complexity. | Choose when deterministic windowed watchdog behavior is mandatory and EEPROM can be added separately. |
Compared with MAX6361KA29+T and STM8T142M2U6, the X4043S8Z-2.7A uniquely combines factory-trimmed 2.85–3.0V VTRIP, field-reprogrammable threshold, and 4kbit high-endurance EEPROM in one SOIC-8 package - delivering lowest component count for systems needing both precision brownout response and robust configuration storage.
Availability
X4043S8Z-2.7A is available at Aetrix Electronics and suitable for industrial automation, medical device manufacturing, smart metering, and automotive body electronics requiring stable component supply with guaranteed long-term availability.
Supply support for X4043S8Z-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 Corporation, now part of Renesas Electronics, designs high-performance analog and mixed-signal ICs for power management, precision sensing, and system supervision.
The X4043S8Z-2.7A belongs to Intersil's CPU Supervisor family, engineered specifically to consolidate reset, watchdog, voltage monitoring, and EEPROM functions into a single chip for space-constrained embedded controllers.
FAQ
What is the exact reset threshold voltage range for X4043S8Z-2.7A?
The X4043S8Z-2.7A has a factory-set VTRIP range of 2.85V to 3.0V, specified over 0°C to 70°C ambient temperature. This range is laser-trimmed during production and remains stable across voltage, temperature, and time - no external components are needed to achieve this accuracy. The X4043S8Z-2.7A datasheet (FN8118 Rev 3.00, Page 3) confirms this value under Ordering Information.
Does X4043S8Z-2.7A support I²C communication at 400kHz?
Yes, the X4043S8Z-2.7A fully supports Fast-mode I²C operation up to 400kHz, as stated in the Features section of the FN8118 datasheet. Its SDA and SCL inputs meet standard I²C timing requirements, including setup/hold times and rise/fall specifications - enabling direct interface with common microcontrollers like STM32, PIC, and NXP Kinetis families without level-shifting or timing adjustments.
Can the reset threshold of X4043S8Z-2.7A be reprogrammed?
Yes, the X4043S8Z-2.7A supports field reprogramming of its VTRIP voltage using a 15–18V pulse applied to the WP pin, followed by a specific I²C sequence (slave address A0h, byte address 01h, data 00h). This allows adjustment to custom thresholds between 1.7V and 5.0V - a capability confirmed in the "VTRIP Programming" section (Pages 5–7) of the FN8118 datasheet.
What is the EEPROM endurance and data retention specification for X4043S8Z-2.7A?
The X4043S8Z-2.7A EEPROM provides minimum 1,000,000 write cycles and 100 years of data retention at +25°C, achieved via Intersil's proprietary Direct Write™ cell technology. These values are guaranteed across the full operating temperature range and are not derated for extended use - making the X4043S8Z-2.7A suitable for lifetime-critical logging applications such as medical device event history or industrial equipment maintenance records.
Is X4043S8Z-2.7A pin-compatible with other members of the X4043/X4045 family?
Yes, all X4043 and X4045 variants - including X4043S8Z-2.7A - share identical 8-pin SOIC pinout, electrical interface, and functional architecture. Differences are limited to VTRIP range, reset polarity (X4043 = active-low, X4045 = active-high), and temperature grade. This allows direct substitution within the same package type without PCB changes, provided the reset polarity and voltage threshold match system requirements.
X4043S8Z-2.7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X4043S8Z-2.7A FAQ
1.How can I place an order for X4043S8Z-2.7A through Aetrix?
Please submit a Request for Quotation (RFQ) for X4043S8Z-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 X4043S8Z-2.7A reliable?
The price and inventory of X4043S8Z-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 X4043S8Z-2.7A is usually 5 days.
3.What payment methods are accepted for X4043S8Z-2.7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4043S8Z-2.7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4043S8Z-2.7A?
X4043S8Z-2.7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4043S8Z-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 X4043S8Z-2.7A?
For technical support, including X4043S8Z-2.7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4043S8Z-2.7A requirements.
6.How does Aetrix verify that X4043S8Z-2.7A is sourced from the original manufacturer or authorized distributors?
All X4043S8Z-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 X4043S8Z-2.7A meets industry standards.
7.What is the process for return or replacement of X4043S8Z-2.7A?
All X4043S8Z-2.7A units undergo pre-shipment inspection (PSI). If there is an issue with X4043S8Z-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 X4043S8Z-2.7A part is unused and in its original packaging.
Return procedure for X4043S8Z-2.7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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