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Renesas X5163S8IZ
- Part No.:
- X5163S8IZ
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5163S8IZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,057
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Product details
Overview
X5163S8IZ 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 during power-up (valid down to VCC = 1V), monitors VCC against a factory-set 4.5–4.75V trip point (reprogrammable), and provides selectable watchdog timeout periods (200ms/600ms/1.4s). It serves as a system-level reliability manager in industrial microcontroller applications requiring brownout protection and nonvolatile configuration storage.
For engineers reviewing the X5163S8IZ datasheet, X5163S8IZ pinout, X5163S8IZ application, or X5163S8IZ equivalent, this device delivers verified low-voltage reset assertion, SPI EEPROM with Block Lock™ protection, reprogrammable VTRIP, volatile watchdog/reset flag detection, and 2MHz SPI interface compliance - all critical for embedded system boot integrity and field-programmable configuration retention.
Technical Context
The X5163S8IZ implements a dual-function CS/WDI pin that enables SPI communication and resets the watchdog timer on each HIGH-to-LOW transition. Its internal voltage reference circuitry supports precise VTRIP detection with 20mV hysteresis and allows in-circuit reprogramming of the reset threshold using external VP pulses on SCK/SI pins.
It integrates four independent functional blocks: a power-on reset generator releasing RESET after 200ms stabilization, a watchdog timer with nonvolatile WD0/WD1 bit selection, a low-VCC comparator asserting RESET below VTRIP, and a 2K × 8 EEPROM array supporting 32-byte page writes and self-timed 5ms typical write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - powers the device across standard 5V logic rails with margin for ripple and drop. |
| VTRIP Threshold | 4.5V to 4.75V - factory-programmed reset trip point optimized for 5V systems; reprogrammable via VP sequence. |
| Watchdog Timeout | 200ms / 600ms / 1.4s - selectable via nonvolatile WD0/WD1 bits; prevents runaway code without software intervention. |
| EEPROM Size | 16Kbit (2K × 8) - stores firmware parameters, calibration data, or serial numbers with 100k write cycles and 100-year retention. |
| SPI Interface | 2MHz max clock, modes 0,0 & 1,1 - compatible with standard microcontroller SPI peripherals without custom timing logic. |
| Standby Current | <1µA (WDT off) / <50µA (WDT on) at 5.5V - enables battery-backed operation in always-on monitoring systems. |
| RESET Valid Down To | VCC = 1V - ensures deterministic reset assertion even during deep brownout or slow power ramp-up. |
Pinout & Package
Package: 8-lead SOIC (RoHS-compliant, MDP0027 footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select / Watchdog Input | Enables SPI mode when LOW; restarts watchdog timer on each HIGH→LOW edge; requires pulse for post-power-up initialization. |
| 2: SO | Serial Output | Push-pull data output; shifts out EEPROM or status register contents on SCK falling edge; high-impedance when CS HIGH. |
| 3: WP | Write Protect | Hardware lock for Status Register writes when WPEN=1; disables inadvertent changes to watchdog or block-lock settings. |
| 4: VSS | Ground | Reference return path for all internal analog and digital circuits; must be low-impedance for stable reset timing. |
| 5: SI | Serial Input | Latches instruction, address, and data bits on SCK rising edge; MSB-first protocol required for all commands. |
| 6: SCK | Serial Clock | Controls SPI timing; rising edge latches input, falling edge outputs data; used with VP for VTRIP programming. |
| 7: RESET/RESET | Active-Low Reset Output | Open-drain output asserted during power-up, brownout, or watchdog timeout; holds active for 200ms after VCC stabilizes above VTRIP. |
| 8: VCC | Supply Voltage | Primary power input; powers all internal blocks including EEPROM, reset generator, and watchdog; supports VTRIP programming voltage injection. |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Allows field adjustment of reset threshold between 1.7V–5.0V using VP pulses on SCK/SI - eliminates need for BOM changes when fine-tuning brownout behavior. |
| Volatile Reset/Watchdog Flag | A single-bit status register flag distinguishes whether RESET was triggered by low VCC or watchdog timeout - enables targeted firmware recovery paths. |
| Block Lock™ EEPROM Protection | Nonvolatile BL0/BL1 bits let users protect 0%, 25%, 50%, or 100% of EEPROM array - prevents accidental overwrites of critical calibration or security data. |
| In-Circuit Programmable ROM Mode | WP pin + WPEN bit combination locks Status Register writes permanently until hardware WP state changes - supports secure manufacturing provisioning. |
| Self-Timed EEPROM Writes | 5ms typical write cycle with no external timing control needed - simplifies firmware design and guarantees completion before next instruction. |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
|
Use Scenario: Microcontroller-based programmable logic controller operating in factory environments with fluctuating 5V rail stability. IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset, brownout detection at 4.5V, and watchdog supervision; EEPROM stores I/O configuration and firmware revision. Use Value: Prevents erratic operation during line sags; enables field-updatable calibration tables without external memory; reduces board space versus discrete reset + EEPROM solution. |
Use Scenario: Portable ultrasound unit requiring guaranteed boot integrity and tamper-resistant storage of sensor calibration coefficients. IC Role / Device Role / Timing Role: System-level reliability manager asserting RESET at VCC < 4.5V and logging fault events in protected EEPROM sectors. Use Value: Ensures safe shutdown during battery depletion; preserves regulatory-critical calibration data across 100k+ write cycles; satisfies IEC 62304 data retention requirements. |
| Smart Energy Meter | Automotive Body Control Module |
|
Use Scenario: ANSI C12.20-compliant electricity meter exposed to wide temperature (-40°C to +85°C) and voltage transients. IC Role / Device Role / Timing Role: Supervisory IC monitoring 5V supply, detecting undervoltage faults, and storing tariff schedules and metering logs in EEPROM. Use Value: Guarantees accurate energy measurement during grid instability; supports 100-year data retention for audit trails; eliminates separate reset IC and serial flash. |
Use Scenario: CAN-connected BCM managing door locks, lighting, and diagnostics in passenger vehicles with 12V-to-5V DC/DC conversion. IC Role / Device Role / Timing Role: Power supervisor ensuring MCU reset during cold-crank conditions; EEPROM stores vehicle-specific configuration and fault history. Use Value: Maintains functional safety during engine start (VCC dip); enables dealership reprogramming of feature sets; meets AEC-Q100 Grade 3 thermal 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 |
|---|---|---|---|
| MAX6369KA22+T | Fixed 2.2V reset threshold; no VTRIP reprogramming; 16Kbit EEPROM; same 8-SOIC package. | Lacks field-adjustable trip point - suitable only where fixed 2.2V brownout detection suffices. | Select when VTRIP flexibility is unnecessary and lower-cost sourcing is prioritized over configurability. |
| STM6315SW33DX | 3.3V fixed reset; no EEPROM; includes manual reset input; 8-SOIC; higher quiescent current (2.5µA standby). | Requires external EEPROM for configuration storage; adds PCB routing for manual reset button. | Choose when system already uses external SPI flash and only basic reset/watchdog functionality is needed. |
Compared with X5163S8IZ, MAX6369KA22+T offers cost savings but forfeits VTRIP programmability, while STM6315SW33DX reduces integration by omitting EEPROM - making X5163S8IZ uniquely suited for compact, field-configurable embedded systems needing both supervisory logic and persistent storage in one die.
Availability
X5163S8IZ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic devices, smart energy meters, automotive body control modules, and portable instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for X5163S8IZ 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) designs high-performance analog and power management ICs focused on reliability, precision, and system integration for industrial, computing, and communications markets.
The X5163 series targets embedded systems requiring consolidated power supervision and nonvolatile memory - reducing bill-of-materials count while enhancing boot-time robustness and field-serviceability through reprogrammable thresholds and protected EEPROM.
FAQ
What is the factory-programmed VTRIP voltage for X5163S8IZ?
The X5163S8IZ is factory-programmed with a VTRIP range of 4.5V to 4.75V, optimized for 5V systems. This threshold is reprogrammable in-circuit using VP pulses applied to SCK and SI pins while holding CS/WDI and WP HIGH - enabling field calibration without replacing the X5163S8IZ.
Does X5163S8IZ support both active-low and active-high reset outputs?
No, X5163S8IZ provides only an active-low RESET/RESET output (open-drain). The X5165 variant in the same family offers active-high reset, but the X5163S8IZ part number specifically denotes the active-low version - confirmed by its ordering suffix "X5163" and datasheet pin description for pin 7.
How does the watchdog timer in X5163S8IZ get reset during normal operation?
The watchdog timer in X5163S8IZ is reset exclusively by a HIGH-to-LOW transition on the CS/WDI pin. This dual-role pin must be toggled within the selected timeout period (200ms/600ms/1.4s) to prevent RESET assertion. Software must issue this pulse regularly - no automatic clearing occurs on SPI activity alone.
Can the EEPROM in X5163S8IZ be written to while the watchdog timer is enabled?
Yes, the EEPROM in X5163S8IZ remains fully accessible for read/write operations regardless of watchdog enable state. The two functions operate independently: EEPROM access uses SPI commands (READ/WRITE/WRSR), while watchdog supervision relies solely on CS/WDI transitions - allowing concurrent configuration updates and system monitoring.
What is the minimum VCC level at which X5163S8IZ guarantees RESET assertion?
X5163S8IZ guarantees RESET assertion down to VCC = 1V, as specified in the datasheet's "Reset signal valid to VCC = 1V" feature. This ensures deterministic reset behavior even during severe brownout or slow power-ramp conditions, a key reliability attribute distinguishing X5163S8IZ from supervisors with higher minimum VCC requirements.
X5163S8IZ 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:
- 4.38V
- 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 FAQ
1.How can I place an order for X5163S8IZ through Aetrix?
Please submit a Request for Quotation (RFQ) for X5163S8IZ 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 reliable?
The price and inventory of X5163S8IZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5163S8IZ is usually 5 days.
3.What payment methods are accepted for X5163S8IZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5163S8IZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5163S8IZ?
X5163S8IZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5163S8IZ 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?
For technical support, including X5163S8IZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5163S8IZ requirements.
6.How does Aetrix verify that X5163S8IZ is sourced from the original manufacturer or authorized distributors?
All X5163S8IZ 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 meets industry standards.
7.What is the process for return or replacement of X5163S8IZ?
All X5163S8IZ units undergo pre-shipment inspection (PSI). If there is an issue with X5163S8IZ, 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 part is unused and in its original packaging.
Return procedure for X5163S8IZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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