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

Renesas X5163S8-4.5A

Name: X5163S8-4.5A
Brand: Renesas
SKU: X5163S8-4.5A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: X5163S8-4.5A

Manufacturer:: Renesas

Category:: Supervisors

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

Datasheet:: X5163S8-4.5A.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8SOIC

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Product details

Overview

X5163S8-4.5A from Intersil 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 asserts active-low RESET at VCC ≥ 1V, provides selectable watchdog timeout (200/600 ms/1.4 s), supports 2.7–5.5V operation, and features reprogrammable 4.5–4.75V reset threshold for industrial microcontroller systems requiring reliable brownout protection and nonvolatile configuration storage.

For engineers reviewing the X5163S8-4.5A datasheet, X5163S8-4.5A pinout, X5163S8-4.5A application, or X5163S8-4.5A equivalent, this device delivers verified low-voltage reset assertion down to 1V, SPI EEPROM with Block Lock™ protection, and factory-programmed 4.5V trip point-critical for embedded systems where deterministic power sequencing and firmware recovery are mandatory.

Technical Context

The X5163S8-4.5A implements a dual-function CS/WDI pin that serves as both chip select and watchdog input, with a HIGH-to-LOW transition required to restart the watchdog timer. Its reset logic combines power-on reset (active at 1V, released after 200ms above VTRIP) and low-VCC detection with hysteresis of 20mV.

Internally, it integrates a 4K × 4 + 8K × 4 EEPROM array organized as 2048 × 8 bits, supporting 32-byte page writes with 5ms typical write cycle time. The Status Register includes volatile WIP and FLAG bits plus nonvolatile WD0/WD1, BL0/BL1, WPEN, and FLB bits-all programmable via WRSR instruction under Write Enable Latch (WEL) control.

Key Specifications

Parameter	Value and Actual Design Meaning
V_TRIP	4.5–4.75V factory-set threshold; ensures system reset before microcontroller enters undefined state during 5V rail collapse
Watchdog Timeout	Selectable 200 ms (WD1=1, WD0=0); enables fast fault response in real-time control loops
EEPROM Capacity	16 Kbits (2048 × 8); stores bootloader parameters, calibration data, or device identity without external memory
Supply Range	2.7–5.5V; supports mixed-voltage designs and battery-backed operation down to 2.7V
Standby Current	<1 µA with watchdog disabled; extends battery life in always-on monitoring nodes
SPI Interface	2 MHz max clock rate, modes 0,0 and 1,1; interoperates with ARM Cortex-M, PIC, and MSP430 SPI peripherals
Reset Valid Voltage	1V minimum; guarantees reset assertion even during deep brownout or cold-start conditions

Pinout & Package

Package: 8-lead SOIC (MDP0027), RoHS-compliant, surface-mount.

Pin	Circuit Role	Design Meaning
1	CS/WDI	Chip select input / watchdog trigger; falling edge resets watchdog timer and enables SPI communication
2	SO	Serial output; push-pull driver for SPI read data, compatible with 3.3V/5V logic levels
3	WP	Write protect input; controls in-circuit programmable ROM mode when WPEN bit is set
4	VSS	Ground reference; must be connected to system common ground for stable reset timing and EEPROM integrity
5	SI	Serial input; latches SPI opcodes, addresses, and data on rising SCK edge (MSB-first)
6	SCK	Serial clock; controls timing for all SPI transactions; rising edge samples SI, falling edge drives SO
7	RESET/RESET	Active-low open-drain reset output; asserted during power-up, brownout, or watchdog timeout
8	VCC	Supply voltage input; powers internal reset generator, watchdog, and EEPROM; range 2.7–5.5V

Key Features

Feature	Design Value
Reprogrammable V_TRIP	Factory-set to 4.5V but adjustable via VP programming sequence to fine-tune for board-level voltage tolerances
Block Lock™ Protection	Configurable 0%, 25%, 50%, or 100% EEPROM write lock via nonvolatile BL0/BL1 bits-prevents accidental firmware corruption
Volatile Reset Flag	FLAG bit distinguishes watchdog-induced reset from low-VCC reset, enabling targeted recovery routines in firmware
Self-timed EEPROM Writes	5ms typical write cycle with automatic internal timing eliminates need for external delay management in host code
Power-up Reset at 1V	Guarantees reset signal validity during ultra-slow power ramp-up, critical for energy-harvesting and capacitor-powered systems

Applications

Industrial PLC I/O Module	Medical Infusion Pump Controller
Use Scenario: Monitors 5V system rail and supervises ARM Cortex-M4 MCU during power transitions and runtime faults. IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset, brownout detection, and watchdog timeout with EEPROM-stored calibration coefficients. Use Value: Prevents erratic actuator behavior during undervoltage by asserting RESET/RESET before MCU executes invalid instructions; stores sensor offsets in protected EEPROM blocks.	Use Scenario: Ensures fail-safe shutdown and recovery in battery-operated infusion pumps with strict safety certification requirements. IC Role / Device Role / Timing Role: Dual-role supervisor: generates guaranteed reset at 1V during battery depletion and logs fault events to EEPROM for post-mortem analysis. Use Value: Meets IEC 62304 Class C software safety requirements by providing deterministic reset timing and tamper-resistant event logging.
Smart Energy Meter	Automotive Body Control Module (BCM)
Use Scenario: Supervises metering SoC during AC line fluctuations and stores tariff tables and billing data in EEPROM. IC Role / Device Role / Timing Role: Voltage supervisor with 4.5V V_TRIP and 200ms watchdog timeout, interfacing via SPI to TI MSP430F67xx metrology MCU. Use Value: Eliminates need for discrete reset IC + external EEPROM, reducing BOM count and PCB area while meeting ANSI C12.20 accuracy standards.	Use Scenario: Manages power sequencing and fault recovery for LIN-connected door module MCU in 12V automotive systems. IC Role / Device Role / Timing Role: Supervisor with brownout detection at 4.5V and EEPROM storage for seat position memory and error codes. Use Value: Supports ISO 16750-2 pulse test compliance by maintaining valid RESET/RESET assertion down to 1V during load-dump transients.

Industrial PLC I/O Module

Medical Infusion Pump Controller

Use Scenario: Monitors 5V system rail and supervises ARM Cortex-M4 MCU during power transitions and runtime faults.

IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset, brownout detection, and watchdog timeout with EEPROM-stored calibration coefficients.

Use Value: Prevents erratic actuator behavior during undervoltage by asserting RESET/RESET before MCU executes invalid instructions; stores sensor offsets in protected EEPROM blocks.

Use Scenario: Ensures fail-safe shutdown and recovery in battery-operated infusion pumps with strict safety certification requirements.

IC Role / Device Role / Timing Role: Dual-role supervisor: generates guaranteed reset at 1V during battery depletion and logs fault events to EEPROM for post-mortem analysis.

Use Value: Meets IEC 62304 Class C software safety requirements by providing deterministic reset timing and tamper-resistant event logging.

Smart Energy Meter

Automotive Body Control Module (BCM)

Use Scenario: Supervises metering SoC during AC line fluctuations and stores tariff tables and billing data in EEPROM.

IC Role / Device Role / Timing Role: Voltage supervisor with 4.5V V_TRIP and 200ms watchdog timeout, interfacing via SPI to TI MSP430F67xx metrology MCU.

Use Value: Eliminates need for discrete reset IC + external EEPROM, reducing BOM count and PCB area while meeting ANSI C12.20 accuracy standards.

Use Scenario: Manages power sequencing and fault recovery for LIN-connected door module MCU in 12V automotive systems.

IC Role / Device Role / Timing Role: Supervisor with brownout detection at 4.5V and EEPROM storage for seat position memory and error codes.

Use Value: Supports ISO 16750-2 pulse test compliance by maintaining valid RESET/RESET assertion down to 1V during load-dump transients.

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
MAX6369KA29+T	Fixed 2.93V reset threshold; no VTRIP reprogramming; 16Kbit EEPROM with 10ms write cycle	Lacks adjustable trip point-unsuitable where 4.5V precision is required for 5V rail margining	Choose only if fixed low-threshold reset suffices and VTRIP tuning is unnecessary
STM6823RWY6F	3.08V reset threshold; no integrated EEPROM; requires external serial flash for configuration storage	Increases BOM count and layout complexity due to separate memory component	Select when EEPROM integration is not needed and cost-per-function favors discrete solutions

Compared with MAX6369KA29+T and STM6823RWY6F, the X5163S8-4.5A uniquely combines factory-trimmed 4.5V reset, field-adjustable VTRIP, and protected 16Kbit EEPROM in one SOIC-8 package-enabling single-component power supervision and nonvolatile storage for space-constrained industrial controllers.

Availability

X5163S8-4.5A is available at Aetrix Electronics and suitable for industrial automation, medical device, smart meter, and automotive body electronics applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for X5163S8-4.5A 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 (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 X5163S8-4.5A belongs to Intersil's CPU Supervisor family, designed to consolidate reset, watchdog, voltage monitoring, and nonvolatile memory functions into a single IC for microcontroller-based systems demanding high reliability and minimal board space.

FAQ

What is the factory-programmed reset threshold voltage for X5163S8-4.5A?

The X5163S8-4.5A is factory-programmed with a nominal V_TRIP of 4.5V, specified over 4.5–4.75V at 0°C to 70°C. This threshold is reprogrammable using the VP programming sequence described in the FN8128 datasheet, allowing field adjustment for board-specific voltage tolerances. The X5163S8-4.5A maintains this setting across temperature and supply variations without recalibration.

Does X5163S8-4.5A support both active-low and active-high reset outputs?

No, the X5163S8-4.5A provides only an active-low RESET/RESET output (open-drain). It is part of the X5163 series, which is designated for active-low reset functionality; the X5165 variant offers active-high reset. The X5163S8-4.5A pinout, datasheet specifications, and ordering information confirm RESET/RESET as active-low only.

Can the watchdog timeout period of X5163S8-4.5A be changed after soldering?

Yes, the watchdog timeout period of X5163S8-4.5A is controlled by nonvolatile WD0 and WD1 bits in the Status Register, programmable via the WRSR instruction. Once written, the timeout remains fixed across power cycles. The X5163S8-4.5A supports 200 ms, 600 ms, 1.4 s, or disabled states-configurable in-system without hardware modification.

What EEPROM protection mechanisms does X5163S8-4.5A provide?

The X5163S8-4.5A implements three-tiered EEPROM protection: (1) Power-up/power-down write inhibit circuitry, (2) Block Lock™ protection configurable for 0%, 25%, 50%, or 100% of the 16Kbit array via BL0/BL1 bits, and (3) In-circuit programmable ROM mode enabled by WPEN bit and WP pin. These features prevent accidental writes during power transitions or firmware updates, ensuring data integrity in the X5163S8-4.5A.

Is X5163S8-4.5A compatible with 3.3V microcontrollers?

Yes, the X5163S8-4.5A operates across 2.7–5.5V and supports 3.3V logic levels: its SI, SO, SCK, and CS/WDI pins meet VIH(min) = 0.7×VCC and VIL(max) = 0.3×VCC thresholds. The SO output is push-pull and drives 3.3V-compatible levels, while RESET/RESET open-drain output works with 3.3V pull-up. The X5163S8-4.5A has been validated for interoperability with 3.3V SPI masters including STM32 and NXP LPC families.

X5163S8-4.5A Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.63V

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

X5163S8-4.5A FAQ

1.How can I place an order for X5163S8-4.5A through Aetrix?

Please submit a Request for Quotation (RFQ) for X5163S8-4.5A 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 X5163S8-4.5A reliable?

The price and inventory of X5163S8-4.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5163S8-4.5A is usually 5 days.

3.What payment methods are accepted for X5163S8-4.5A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5163S8-4.5A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for X5163S8-4.5A?

X5163S8-4.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your X5163S8-4.5A 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 X5163S8-4.5A?

For technical support, including X5163S8-4.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5163S8-4.5A requirements.

6.How does Aetrix verify that X5163S8-4.5A is sourced from the original manufacturer or authorized distributors?

All X5163S8-4.5A 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 X5163S8-4.5A meets industry standards.

7.What is the process for return or replacement of X5163S8-4.5A?

All X5163S8-4.5A units undergo pre-shipment inspection (PSI). If there is an issue with X5163S8-4.5A, 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 X5163S8-4.5A part is unused and in its original packaging.

Return procedure for X5163S8-4.5A:

1.Submit a request within 90 days.

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

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