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Renesas X5043S8Z-2.7
- Part No.:
- X5043S8Z-2.7
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5043S8Z-2.7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,568
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Product details
Overview
X5043S8Z-2.7 from Intersil (now Renesas) is a CPU supervisor IC integrating power-on reset, watchdog timer, supply voltage supervision, and 4Kbit SPI EEPROM in a single 8-pin SOIC package. It provides 2.85V–3.0V reset threshold, 200ms reset timeout, and operates across 2.7V–5.5V VCC with <10µA standby current (watchdog off). It serves as system-level fault monitor and nonvolatile configuration storage in microcontroller-based embedded systems.
For engineers reviewing the X5043S8Z-2.7 datasheet, X5043S8Z-2.7 pinout, X5043S8Z-2.7 application, or X5043S8Z-2.7 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in FN8126 Rev 3.00 and official ordering data for X5043S8Z-2.7.
Technical Context
The X5043S8Z-2.7 implements a dual-function CS/WDI pin that serves both chip select and watchdog input, requiring periodic toggling to prevent reset assertion. Its reset output is active-low open-drain, asserted when VCC drops below 2.85V (±2.5%) or watchdog timeout occurs, and held active for 200ms after VCC recovery.
Internally, it combines a 512 × 8-bit SPI EEPROM with Block Lock™ protection (configurable 0%, 25%, 50%, or 100% array lock), Direct Write™ memory cells (1M write cycles, 100-year retention), and a nonvolatile status register controlling watchdog timeout (200ms/600ms/1.4s/disabled) and memory protection level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 2.85V ±2.5% - triggers reset during brownout; reprogrammable via VP=15–18V sequence |
| VCC Range | 2.7V–5.5V - supports wide-input industrial and battery-powered systems without external regulators |
| EEPROM Size | 4Kbits (512 × 8) - stores critical calibration, serial ID, or firmware config without external memory |
| SPI Clock Rate | 3.3MHz max - enables fast configuration reads/writes compatible with mid-speed MCU SPI peripherals |
| Standby Current | <10µA (WDT off) - extends battery life in always-on monitoring applications |
| Reset Timeout | 200ms nominal - ensures stable power and oscillator startup before processor release |
| Watchdog Options | 200ms / 600ms / 1.4s / disabled - selectable via nonvolatile status register bits WD1/WD0 |
Pinout & Package
Package: 8-lead SOIC (Pb-free, RoHS compliant), 0°C to +70°C operating temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select Input / Watchdog Input | Active-low enable for SPI interface; falling edge resets watchdog timer; must toggle within timeout period |
| 2: WP | Write Protect Input | Low = disables all nonvolatile writes (EEPROM & status register); overrides WREN latch when asserted |
| 3: SO | Serial Output | Push-pull output; data shifted out on SCK falling edge; high-impedance when CS high |
| 4: VSS | Ground | Reference return path for all internal circuits and I/O pins |
| 5: VCC | Supply Voltage | 2.7V–5.5V input; powers reset generator, watchdog, EEPROM, and logic; feeds VTRIP comparator |
| 6: SCK | Serial Clock Input | Controls SPI timing; rising edge latches SI data; falling edge clocks SO data |
| 7: SI | Serial Input | Accepts opcodes, addresses, and write data; latched on SCK rising edge |
| 8: RESET/RESET | Active-Low Reset Output | Open-drain output asserted during power-up, brownout (VCC < 2.85V), or watchdog timeout; valid down to VCC = 1V |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Threshold adjustable to custom voltage (e.g., 2.9V) using 15–18V VP on WP pin - eliminates need for external resistor networks |
| Block Lock™ Protection | Nonvolatile BL0/BL1 bits allow selective write-protection of 0%, 25%, 50%, or 100% of EEPROM - prevents accidental firmware corruption |
| Direct Write™ Memory | 1 million write cycles and 100-year data retention - suitable for field-updatable calibration tables in industrial equipment |
| Integrated Watchdog Timer | Four selectable timeouts stored in nonvolatile status register - survives power cycles and maintains user-selected setting |
| Dual-Function CS/WDI Pin | Single pin handles both SPI enable and watchdog feed - reduces MCU GPIO count and simplifies PCB routing |
Applications
| Industrial Process Controller | Network Router |
|---|---|
|
Use Scenario: Monitors 3.3V supply rail and detects firmware hang in PLC main controller. IC Role / Device Role / Timing Role: Provides power-on reset, brownout detection at 2.85V, and 600ms watchdog timeout; stores device MAC address and calibration offsets in protected EEPROM. Use Value: Prevents erratic operation during voltage sags; eliminates need for discrete reset IC + external EEPROM - saves 25mm² board area. |
Use Scenario: Ensures reliable boot sequence and runtime supervision in enterprise-grade Ethernet switch. IC Role / Device Role / Timing Role: Generates 200ms power-up reset pulse; asserts reset if management MCU fails to toggle CS/WDI; retains port configuration in 4Kbit EEPROM. Use Value: Guarantees deterministic startup after power loss; enables field updates without risk of bricking due to partial EEPROM writes. |
| Medical Diagnostic Handheld | Smart Energy Meter |
|
Use Scenario: Supervises lithium-ion battery-backed 2.7V system and safeguards against firmware lockup during sensor acquisition. IC Role / Device Role / Timing Role: Active-low reset output tied to MCU reset pin; watchdog timeout set to 200ms; stores patient ID and last-measurement timestamp in block-locked EEPROM. Use Value: Meets IEC 62304 safety requirements for fail-safe reset behavior; low 10µA standby current extends battery life by >18 months. |
Use Scenario: Maintains tamper-proof metering constants and tariff schedules across frequent AC line interruptions. IC Role / Device Role / Timing Role: Detects VCC drop below 2.85V during brownouts; holds reset until stable; stores billing data in 100-year-retention EEPROM with full array lock enabled. Use Value: Eliminates data loss during grid instability; satisfies ANSI C12.22 encryption key storage integrity requirements. |
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 reprogramming; 1Kbit EEPROM; 2.7–5.5V VCC | Lacks adjustable trip point and larger EEPROM - unsuitable where fine-tuned brownout response or >1Kbit config storage is required | Select when cost sensitivity outweighs programmability needs and 1Kbit EEPROM suffices |
| STM802SWX6F | 2.63V fixed reset; no EEPROM; push-pull reset output; 2.7–5.5V VCC; no watchdog timer | Provides only reset supervision - requires external EEPROM and separate watchdog IC for full X5043S8Z-2.7 functionality | Choose only if system already includes SPI EEPROM and independent watchdog, and 2.63V trip matches design margin |
Compared with MAX6361KA29+T and STM802SWX6F, X5043S8Z-2.7 uniquely delivers reprogrammable VTRIP, 4Kbit EEPROM, and configurable watchdog in one SOIC-8 - reducing BOM count by up to three components while enabling field-adjustable brownout response.
Availability
X5043S8Z-2.7 is available at Aetrix Electronics and suitable for industrial process controllers, network routers, and smart energy meters requiring stable component supply, long-term EEPROM data retention, and field-programmable reset thresholds.
Supply support for X5043S8Z-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
Renesas Electronics (formerly Intersil) is a global semiconductor leader specializing in microcontrollers, analog, and power management solutions for industrial, automotive, and communications markets.
The X5043 family was designed to consolidate power supervision, watchdog, and nonvolatile storage into a single IC for space-constrained embedded systems - targeting reliability-critical applications where discrete solutions increase failure risk.
FAQ
What is the exact reset threshold voltage for X5043S8Z-2.7?
The X5043S8Z-2.7 has a factory-set VTRIP of 2.85V ±2.5%, meaning it asserts RESET/RESET when VCC falls below 2.78V (min) and releases it after VCC rises above 2.92V (max) for 200ms. This value is reprogrammable to custom voltages using the VP=15–18V sequence documented in FN8126 Rev 3.00, Page 6.
Does X5043S8Z-2.7 support both active-low and active-high reset outputs?
No - X5043S8Z-2.7 provides only an active-low open-drain RESET/RESET output. The datasheet confirms this in the Pin Descriptions section (Page 5): "RESET/RESET is an active low/HIGH, open drain output…" - but the "HIGH" variant applies only to the X5045 series. X5043S8Z-2.7 is strictly active-low, as confirmed by its part number suffix "-2.7" and ordering table entries.
How many write cycles does the EEPROM in X5043S8Z-2.7 support?
The EEPROM in X5043S8Z-2.7 supports a minimum of 1,000,000 write cycles, per FN8126 Rev 3.00, Page 8 ("minimum endurance of 1,000,000 cycles"). This exceeds standard EEPROM specs and is enabled by Intersil's proprietary Direct Write™ cell technology - making it suitable for frequently updated calibration or logging data.
Can the watchdog timer timeout be changed after initial programming of X5043S8Z-2.7?
Yes - the watchdog timeout is controlled by nonvolatile WD0/WD1 bits in the status register, which can be rewritten using the WRSR instruction. Once set, the timeout persists across power cycles and remains unchanged unless explicitly modified again via SPI command - enabling field-upgradable supervision behavior without hardware changes.
Is X5043S8Z-2.7 RoHS compliant and lead-free?
Yes - X5043S8Z-2.7 is Pb-Free Plus Anneal (RoHS compliant), as stated in the Ordering Information table (Page 3) and Notes section (Page 4). It uses 100% matte tin plate termination finish and meets IPC/JEDEC J-STD-020 reflow requirements for lead-free soldering processes.
X5043S8Z-2.7 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:
- 2.62V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X5043S8Z-2.7 FAQ
1.How can I place an order for X5043S8Z-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X5043S8Z-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 X5043S8Z-2.7 reliable?
The price and inventory of X5043S8Z-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 X5043S8Z-2.7 is usually 5 days.
3.What payment methods are accepted for X5043S8Z-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5043S8Z-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5043S8Z-2.7?
X5043S8Z-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5043S8Z-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 X5043S8Z-2.7?
For technical support, including X5043S8Z-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5043S8Z-2.7 requirements.
6.How does Aetrix verify that X5043S8Z-2.7 is sourced from the original manufacturer or authorized distributors?
All X5043S8Z-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 X5043S8Z-2.7 meets industry standards.
7.What is the process for return or replacement of X5043S8Z-2.7?
All X5043S8Z-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X5043S8Z-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 X5043S8Z-2.7 part is unused and in its original packaging.
Return procedure for X5043S8Z-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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