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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Renesas X5163S8IZ-2.7

Name: X5163S8IZ-2.7
Brand: Renesas
SKU: X5163S8IZ-2.7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: X5163S8IZ-2.7

Manufacturer:: Renesas

Category:: Supervisors

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: X5163S8IZ-2.7.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8SOIC

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Product details

Overview

X5163S8IZ-2.7 from Intersil (now Renesas) is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 16Kbit SPI EEPROM in an 8-lead SOIC package. It operates from 2.7V to 5.5V, features a factory-programmed 2.55V–2.7V VTRIP threshold, supports –40°C to +85°C industrial temperature range, and delivers active reset assertion down to VCC = 1V - used in embedded microcontroller systems requiring reliable boot sequencing and brownout protection.

For engineers reviewing the X5163S8IZ-2.7 datasheet, X5163S8IZ-2.7 pinout, X5163S8IZ-2.7 application, or X5163S8IZ-2.7 equivalent, this page provides verified functional identity, validated pin-level circuit roles, confirmed VTRIP and watchdog timing values, real-world use scenarios for industrial controllers and battery-powered edge devices, and two technically documented alternative parts with explicit differences in reset polarity and trip voltage.

Technical Context

The X5163S8IZ-2.7 implements a dual-function reset architecture: power-on reset activates at VCC ≥ 1V and holds RESET/RESET active for 100–280ms until VCC exceeds its 2.55V–2.7V trip point and stabilizes for 200ms; low-voltage detection asserts RESET/RESET when VCC falls below that same threshold and releases only after VCC recovers and remains stable for 200ms. Its watchdog timer uses nonvolatile WD0/WD1 bits to select fixed timeout intervals of 200ms, 600ms, or 1.4s - independent of power cycling.

Internally, it combines a 4K × 4-bit EEPROM array with Block Lock™ protection (configurable to lock 0%, 25%, 50%, or 100% of memory), SPI interface compliant with modes 0,0 and 1,1, and a programmable VTRIP circuit capable of reprogramming to custom thresholds between 1.7V and 5.0V using external VP pulses on SCK/SI - though the X5163S8IZ-2.7 ships with factory-set 2.55V–2.7V trip.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	2.7V to 5.5V - supports single-supply operation across wide industrial rail voltages including 3.3V and 5V systems.
VTRIP Threshold	2.55V to 2.7V - factory-programmed low-voltage detection window optimized for 3.3V systems with margin against brownout.
Watchdog Timeout	Selectable 200ms / 600ms / 1.4s - nonvolatile configuration enables deterministic fail-safe response without software overhead.
EEPROM Size	16Kbit (2K × 8) - sufficient for firmware versioning, calibration data, and device-specific configuration storage.
Standby Current	<20µA at 3.6V with WDT enabled - enables long-term operation in battery-backed or energy-constrained applications.
SPI Speed	2MHz max - compatible with standard microcontroller SPI peripherals without requiring clock divider adjustments.
Reset Output Type	Active-low open-drain RESET - allows wired-OR configuration with other system reset sources and flexible pull-up selection.

Pinout & Package

Package: 8-lead SOIC (RoHS-compliant, MDP0027 footprint), surface-mount, -40°C to +85°C operating range.

Pin/Terminal	Circuit Role	Design Meaning
1: CS/WDI	Chip Select Input / Watchdog Input	Enables SPI communication when LOW; toggling HIGH→LOW resets watchdog timer - dual-role pin reduces board routing count.
2: SO	Serial Output	Push-pull data output synchronized to SCK falling edge - eliminates need for external pull-up during read operations.
3: WP	Write Protect Control	Hardware-enabled lock for Status Register writes when WPEN bit = 1 - prevents accidental corruption of watchdog or block-lock settings.
4: VSS	Ground Reference	Primary return path for all internal circuits; must be connected to system ground plane for stable reset timing and EEPROM reliability.
5: SI	Serial Input	Latches instruction, address, and data on SCK rising edge - MSB-first protocol ensures compatibility with ARM, PIC, and STM32 SPI peripherals.
6: SCK	Serial Clock	Master-generated clock controlling all SPI timing; also serves as programming voltage input during VTRIP reconfiguration sequences.
7: RESET/RESET	Reset Output	Open-drain active-low signal asserted during power-up, brownout, or watchdog timeout - requires external pull-up resistor (typically 4.7kΩ).
8: VCC	Supply Voltage Input	Power source for all internal blocks; supplies voltage reference for VTRIP comparator and powers EEPROM write circuitry.

Key Features

Feature	Design Value
Reprogrammable VTRIP	Factory-set to 2.55–2.7V but supports field adjustment to any value between 1.7V and 5.0V using VP pulses - enables precise matching to system-specific brownout margins.
Block Lock™ EEPROM Protection	Nonvolatile BL0/BL1 bits allow locking 0%, 25%, 50%, or 100% of 16Kbit array - protects critical calibration or security keys from overwrite while permitting runtime updates to user data sections.
Volatile Reset Source Flag	Flag bit in Status Register distinguishes watchdog timeout vs. low-voltage reset - enables firmware to initiate appropriate recovery (e.g., watchdog reset triggers diagnostics; brownout triggers graceful shutdown).
Self-timed EEPROM Writes	5ms typical write cycle time per 32-byte page - eliminates need for software polling or fixed delay loops; WIP bit indicates completion status.
Low-Voltage Valid Reset	RESET/RESET remains functional down to VCC = 1V - guarantees safe processor halt even during deep brownout or battery depletion conditions.

Applications

Industrial PLC Controller	Medical Sensor Node
Use Scenario: Programmable logic controller executing cyclic control tasks in factory automation environments with fluctuating 24VDC-derived 3.3V rails. IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset synchronization, brownout detection at 2.55V, and watchdog timeout monitoring of main MCU execution loop. Use Value: Prevents erratic behavior during line sags by asserting RESET/RESET before VCC drops below 2.55V, and forces controlled reboot if firmware hangs - improving system MTBF by eliminating silent failures.	Use Scenario: Portable patient monitor collecting ECG/SpO₂ data via ultra-low-power MCU powered by coin-cell battery. IC Role / Device Role / Timing Role: Supervisor ensuring clean boot at startup, detecting battery depletion below 2.7V, and storing last-valid calibration coefficients in protected EEPROM sectors. Use Value: Enables <20µA standby current with watchdog enabled - extends battery life beyond 12 months; Block Lock™ preserves factory calibration data across 100,000+ write cycles.
Smart Energy Meter	Automotive Body Control Module
Use Scenario: Revenue-grade electricity meter operating from split-phase AC with isolated DC-DC converter supplying 3.3V to metrology SoC. IC Role / Device Role / Timing Role: Voltage supervisor monitoring 3.3V rail integrity, triggering hardware reset on undervoltage, and logging fault timestamps in EEPROM during grid disturbances. Use Value: Guarantees accurate metering resumes only after stable 3.3V rail is confirmed for ≥200ms - preventing corrupted register reads during transient dips.	Use Scenario: CAN-connected BCM managing door locks, lighting, and HVAC in passenger vehicles with 12V battery input and LDO-regulated 3.3V domain. IC Role / Device Role / Timing Role: Supervisor detecting battery voltage sag during cold cranking (<9V), asserting RESET/RESET to halt non-critical functions, and preserving EEPROM-stored configuration across restarts. Use Value: Maintains functional safety by halting actuator commands during brownout; EEPROM retains user preferences (e.g., mirror position) with 100-year data retention.

Industrial PLC Controller

Medical Sensor Node

Use Scenario: Programmable logic controller executing cyclic control tasks in factory automation environments with fluctuating 24VDC-derived 3.3V rails.

IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset synchronization, brownout detection at 2.55V, and watchdog timeout monitoring of main MCU execution loop.

Use Value: Prevents erratic behavior during line sags by asserting RESET/RESET before VCC drops below 2.55V, and forces controlled reboot if firmware hangs - improving system MTBF by eliminating silent failures.

Use Scenario: Portable patient monitor collecting ECG/SpO₂ data via ultra-low-power MCU powered by coin-cell battery.

IC Role / Device Role / Timing Role: Supervisor ensuring clean boot at startup, detecting battery depletion below 2.7V, and storing last-valid calibration coefficients in protected EEPROM sectors.

Use Value: Enables <20µA standby current with watchdog enabled - extends battery life beyond 12 months; Block Lock™ preserves factory calibration data across 100,000+ write cycles.

Smart Energy Meter

Automotive Body Control Module

Use Scenario: Revenue-grade electricity meter operating from split-phase AC with isolated DC-DC converter supplying 3.3V to metrology SoC.

IC Role / Device Role / Timing Role: Voltage supervisor monitoring 3.3V rail integrity, triggering hardware reset on undervoltage, and logging fault timestamps in EEPROM during grid disturbances.

Use Value: Guarantees accurate metering resumes only after stable 3.3V rail is confirmed for ≥200ms - preventing corrupted register reads during transient dips.

Use Scenario: CAN-connected BCM managing door locks, lighting, and HVAC in passenger vehicles with 12V battery input and LDO-regulated 3.3V domain.

IC Role / Device Role / Timing Role: Supervisor detecting battery voltage sag during cold cranking (<9V), asserting RESET/RESET to halt non-critical functions, and preserving EEPROM-stored configuration across restarts.

Use Value: Maintains functional safety by halting actuator commands during brownout; EEPROM retains user preferences (e.g., mirror position) with 100-year data retention.

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 reprogramming; 16Kbit EEPROM; active-low reset; same 8-SOIC package.	Designed for 3.3V systems requiring tighter 2.93V trip - less margin than X5163S8IZ-2.7's 2.55–2.7V window for brownout tolerance.	Select when exact 2.93V detection is required and VTRIP adjustability is unnecessary; verify compatibility with existing PCB layout due to identical pinout.
STM6315DWB6F	2.63V reset threshold; no integrated EEPROM; includes manual reset input; 8-SOIC package; watchdog timeout not user-selectable.	Supervisor-only function - requires external EEPROM for configuration storage; manual reset adds flexibility but increases BOM count.	Choose when EEPROM integration is not needed and manual reset capability is prioritized; confirm system-level EEPROM solution meets endurance and retention requirements.

Compared with MAX6361KA29+T and STM6315DWB6F, the X5163S8IZ-2.7 uniquely combines factory-trimmed brownout margin (2.55–2.7V), field-reprogrammable VTRIP, and integrated Block Lock™ EEPROM - enabling both robust power failure response and secure, long-term parameter storage in a single chip.

Availability

X5163S8IZ-2.7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, smart energy meters, and automotive body control modules requiring stable component supply with guaranteed long-term availability.

Supply support for X5163S8IZ-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 (acquired by Renesas Electronics in 2017) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, precision analog, and timing applications.

The X5163 family was designed to consolidate power supervision, watchdog safety, and nonvolatile storage into one IC for resource-constrained microcontroller systems - targeting industrial, medical, and automotive applications demanding reliability and board-space efficiency.

FAQ

What is the factory-programmed VTRIP voltage range for X5163S8IZ-2.7?

The X5163S8IZ-2.7 is factory-programmed with a VTRIP range of 2.55V to 2.7V, optimized for 3.3V supply rails with brownout margin. This threshold is guaranteed over the full –40°C to +85°C temperature range and does not require field calibration. The device retains the ability to reprogram VTRIP to other values between 1.7V and 5.0V using the VP pulse sequence, though most users operate it at the factory setting. X5163S8IZ-2.7 maintains this specification across its entire qualified lifetime.

Does X5163S8IZ-2.7 support both active-low and active-high reset outputs?

No, X5163S8IZ-2.7 provides only an active-low open-drain RESET/RESET output. The "X5163" suffix denotes active-low reset; the "X5165" variant (e.g., X5165S8IZ-2.7) provides active-high reset. Pin 7 (RESET/RESET) on X5163S8IZ-2.7 sinks current when asserted and requires an external pull-up resistor. This design enables wired-OR connection with other reset sources in complex systems. X5163S8IZ-2.7 does not support active-high output without external inversion circuitry.

How is the watchdog timeout period configured on X5163S8IZ-2.7?

The watchdog timeout on X5163S8IZ-2.7 is set via two nonvolatile bits (WD0 and WD1) in the Status Register, programmed using the WRSR instruction. These bits select fixed intervals: 00 = 1.4s, 01 = 600ms, 10 = 200ms, 11 = disabled. Once written, the setting persists across power cycles and cannot be altered unless the WP pin is HIGH and WPEN = 0. X5163S8IZ-2.7 does not support dynamic timeout adjustment during runtime - configuration occurs once during initialization or manufacturing.

What EEPROM protection mechanisms does X5163S8IZ-2.7 provide?

X5163S8IZ-2.7 implements three-tiered EEPROM protection: (1) Power-up/power-down write inhibit circuitry prevents spurious writes during supply transients; (2) Block Lock™ using BL0/BL1 bits to protect 0%, 25%, 50%, or 100% of the 16Kbit array; and (3) In-Circuit Programmable ROM mode activated by WP pin LOW + WPEN bit HIGH, which disables all Status Register writes. X5163S8IZ-2.7 ensures these protections remain effective across temperature and voltage extremes per its qualified operating conditions.

Can X5163S8IZ-2.7 operate reliably at VCC = 1V?

Yes, X5163S8IZ-2.7 guarantees RESET/RESET assertion down to VCC = 1V, ensuring the microcontroller remains held in reset during deep brownout or battery depletion. While active functions (EEPROM read/write, SPI communication) require ≥2.7V, the reset generator circuitry remains fully operational at 1V - a key differentiator for safety-critical applications. This behavior is validated across the full –40°C to +85°C range and is specified in the Absolute Maximum Ratings and Operating Specifications tables of the FN8128 datasheet. X5163S8IZ-2.7 meets this requirement without derating.

X5163S8IZ-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:: 2.63V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 100ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

X5163S8IZ-2.7 FAQ

1.How can I place an order for X5163S8IZ-2.7 through Aetrix?

Please submit a Request for Quotation (RFQ) for X5163S8IZ-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 X5163S8IZ-2.7 reliable?

The price and inventory of X5163S8IZ-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 X5163S8IZ-2.7 is usually 5 days.

3.What payment methods are accepted for X5163S8IZ-2.7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5163S8IZ-2.7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for X5163S8IZ-2.7?

X5163S8IZ-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your X5163S8IZ-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 X5163S8IZ-2.7?

For technical support, including X5163S8IZ-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5163S8IZ-2.7 requirements.

6.How does Aetrix verify that X5163S8IZ-2.7 is sourced from the original manufacturer or authorized distributors?

All X5163S8IZ-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 X5163S8IZ-2.7 meets industry standards.

7.What is the process for return or replacement of X5163S8IZ-2.7?

All X5163S8IZ-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X5163S8IZ-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 X5163S8IZ-2.7 part is unused and in its original packaging.

Return procedure for X5163S8IZ-2.7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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