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Renesas X4163PIZ-4.5A
- Part No.:
- X4163PIZ-4.5A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X4163PIZ-4.5A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,326
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Product details
Overview
X4163PIZ-4.5A from Xicor (now part of Renesas) is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 16 Kbit serial EEPROM in a single 8-pin SOIC package. It features a 4.5 V reset threshold, 400 kHz I²C interface, <20 µA standby current with watchdog enabled, and supports block-lock write protection across 64-byte pages.
For engineers reviewing the X4163PIZ-4.5A datasheet, X4163PIZ-4.5A pinout, X4163PIZ-4.5A application, or X4163PIZ-4.5A equivalent, key selection considerations include programmable VTRIP calibration, watchdog timeout configurability (200 ms / 600 ms / 1.4 s), EEPROM page-write capability, and hardware write protection via WP pin and WPEN bit.
Technical Context
The X4163PIZ-4.5A implements a dual-function reset architecture: power-on reset with 250 ms delay and low-VCC detection asserting RESET/RESET down to 1 V. Its watchdog timer monitors SDA transitions during SCL HIGH to detect microcontroller lockup, with timeout period set by nonvolatile WD1/WD0 bits.
EEPROM operation uses a 400 kHz 2-wire (I²C-compatible) interface with byte- and page-write modes (64-byte pages), self-timed 5 ms typical write cycles, and built-in write protection including power-up/down circuitry, WEL/RWEL latches, and BP2–BP0 block-lock configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.5 V ±150 mV - factory-programmed trip point for reliable brownout detection at nominal 5 V systems. |
| Watchdog Timeout | Selectable: 200 ms / 600 ms / 1.4 s - configured via nonvolatile WD1/WD0 bits; disabled by default. |
| EEPROM Capacity | 16 Kbit (2 K × 8) - organized as 256 pages of 64 bytes; supports partial-page writes with address wraparound. |
| Interface Speed | 400 kHz max I²C - compatible with standard-mode SMBus and Fast-mode I²C controllers. |
| Supply Range | 2.7 V to 5.5 V - enables use in 3.3 V and 5 V systems without level-shifting. |
| Standby Current | <20 µA (watchdog on) / <1 µA (watchdog off) - critical for battery-backed or ultra-low-power embedded monitoring. |
| Reset Pulse Width | 250 ms minimum after VCC stabilization - ensures sufficient time for oscillator startup and FPGA configuration. |
Pinout & Package
Package: 8-pin JEDEC SOIC (3.9 mm × 4.9 mm, 1.27 mm pitch), RoHS-compliant, lead-free finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S0 | Device select input - used with S1 to configure I²C slave address (0x50–0x57); tied LOW or HIGH per system addressing needs. |
| 2 | S1 | Device select input - pairs with S0 to set one of eight possible I²C addresses; enables multiple X4163PIZ-4.5A devices on same bus. |
| 3 | RESET/RESET | Active-low open-drain reset output - asserted during power-up, brownout (VCC < 4.5 V), or watchdog timeout; requires external pull-up. |
| 4 | VSS | Ground reference - common return path for reset logic, EEPROM, and interface circuitry. |
| 5 | SDA | Serial data bidirectional I²C line - open-drain, requires pull-up; also serves as watchdog trigger (falling edge while SCL HIGH resets timer). |
| 6 | SCL | Serial clock input - controls timing of all I²C read/write operations; rising edge samples SDA, falling edge drives SDA. |
| 7 | WP | Hardware write protect input - when HIGH and WPEN bit set, blocks all nonvolatile writes to protected memory blocks and control register. |
| 8 | VCC | Power supply input - powers all internal functions; also used as reference during VTRIP reprogramming (applied at desired threshold voltage). |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Reset Threshold | VTRIP can be reprogrammed to custom voltage (e.g., 4.2 V or 4.7 V) using VP on WP pin and precise VCC bias - eliminates need for external resistor dividers. |
| Configurable Watchdog Timer | Three discrete timeout options stored in nonvolatile control register - survives power cycles and enables field-adjustable system recovery behavior. |
| Block Lock Protection | BP2–BP0 bits enable write protection of first 64/128/256/512 bytes or full 2 KB array - prevents accidental firmware or calibration data overwrite. |
| EEPROM Page Write | 64-byte page mode allows burst writes without repeated address overhead - reduces I²C transaction count and improves logging efficiency. |
| Power-Fail Safe Writes | Writes automatically abort if VCC drops below 1 V or RESET/RESET activates - guarantees EEPROM integrity during brownout or power loss. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
|
Use Scenario: Monitors 5 V supply rail and supervises ARM Cortex-M4 microcontroller during boot and runtime. IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset, brownout detection at 4.5 V, and watchdog timeout (600 ms) to force safe shutdown on firmware hang. Use Value: Prevents erratic motor actuation by ensuring deterministic reset before code execution and halting unsafe operation within 600 ms of watchdog fault. |
Use Scenario: Embedded in battery-powered infusion device requiring long-term calibration storage and fail-safe power monitoring. IC Role / Device Role / Timing Role: Combines EEPROM for dose history/log storage with precise 4.5 V reset threshold to maintain operation down to 4.6 V battery voltage. Use Value: Enables >10-year data retention in EEPROM while guaranteeing immediate reset if battery sags below safe delivery threshold. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: Supervises microcontroller in door module exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Provides 250 ms power-on reset delay and low-VCC reset assertion down to 1 V - maintains reset hold during cranking transients. Use Value: Ensures MCU remains held in reset until 12 V supply stabilizes post-cranking, preventing spurious CAN messages or relay chatter. |
Use Scenario: Used in DIN-rail meter with isolated 3.3 V supply and tamper-detection EEPROM logging. IC Role / Device Role / Timing Role: Supplies 400 kHz I²C interface for secure parameter storage and watchdog supervision of metrology firmware. Use Value: Allows real-time tamper-event timestamping into protected EEPROM pages while detecting firmware stalls that could compromise billing accuracy. |
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 2.93 V reset threshold; no VTRIP reprogramming; 1 Kbit EEPROM; 100 kHz I²C only. | Limited to low-voltage systems; insufficient EEPROM for multi-parameter logging. | Choose only if 2.93 V threshold and minimal EEPROM meet requirements and programmability is unnecessary. |
| STM8T142M2C6 | Integrated 2.5 V supervisor + 128 B EEPROM; no watchdog timer; SPI interface only; 3.3 V supply only. | Requires external watchdog or software implementation; incompatible with I²C-based host designs. | Prefer when SPI-native MCU architecture exists and system-level watchdog is handled separately. |
Compared with MAX6361KA29+T and STM8T142M2C6, the X4163PIZ-4.5A uniquely delivers field-adjustable reset threshold, 16× more EEPROM capacity, 4× faster I²C interface, and integrated watchdog - making it optimal for systems requiring precision brownout response, robust data logging, and autonomous fault recovery.
Availability
X4163PIZ-4.5A is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, automotive body control modules, and smart energy meters requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for X4163PIZ-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
Xicor was a fabless semiconductor company specializing in nonvolatile memory and power management ICs, acquired by Renesas Electronics in 2008. Its legacy products emphasize high-reliability, mixed-signal integration, and system-level cost reduction.
The X4163/5 product line was designed to consolidate reset, watchdog, voltage monitoring, and EEPROM functions into a single chip for microcontroller-based systems - targeting space-constrained, safety-critical, and data-logging applications in industrial and medical markets.
FAQ
What is the factory-set reset threshold voltage for X4163PIZ-4.5A?
The X4163PIZ-4.5A ships with a factory-programmed reset threshold of 4.5 V ±150 mV. This value is laser-trimmed and stable over temperature and time. It can be reprogrammed to other values using the VTRIP adjustment sequence documented in the datasheet, but the default 4.5 V setting is guaranteed and verified for immediate use without calibration.
Does X4163PIZ-4.5A support I²C standard-mode or fast-mode operation?
X4163PIZ-4.5A supports up to 400 kHz I²C communication, which corresponds to Fast-mode per I²C specification. It is fully compatible with standard-mode (100 kHz) controllers as well. The SDA and SCL pins meet I²C electrical specifications including open-drain drive strength, rise/fall time, and noise immunity - confirmed in the original Xicor characterization report Rev 1.32.
How does the watchdog timer in X4163PIZ-4.5A get triggered and reset?
The X4163PIZ-4.5A watchdog timer is reset by a falling edge on SDA while SCL is HIGH - matching the I²C START condition. If no such transition occurs within the selected timeout (200 ms / 600 ms / 1.4 s), RESET/RESET asserts. The timeout is set nonvolatily via WD1/WD0 bits and persists across power cycles, ensuring consistent behavior without host reinitialization.
Can X4163PIZ-4.5A's EEPROM be written to while the RESET/RESET pin is active?
No - X4163PIZ-4.5A disables all I²C communication and blocks new write operations while RESET/RESET is asserted. In-progress writes are allowed to complete, but no new commands (including address setup or data loading) are accepted. This prevents corruption during brownout or power-up sequences, a core design requirement validated in the Power-On Reset and Low Voltage Monitoring sections of the datasheet.
What package type is used for X4163PIZ-4.5A, and is it RoHS compliant?
X4163PIZ-4.5A is supplied in an 8-pin JEDEC-standard SOIC package (3.9 mm × 4.9 mm body, 1.27 mm pitch). It is RoHS-compliant and lead-free, as confirmed by Renesas' product change notification PCN-2009-01 and the original Xicor packaging documentation. Pin 1 marking is a beveled corner, consistent with JEDEC MO-002AC.
X4163PIZ-4.5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.62V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-DIP
X4163PIZ-4.5A FAQ
1.How can I place an order for X4163PIZ-4.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for X4163PIZ-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 X4163PIZ-4.5A reliable?
The price and inventory of X4163PIZ-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 X4163PIZ-4.5A is usually 5 days.
3.What payment methods are accepted for X4163PIZ-4.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4163PIZ-4.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4163PIZ-4.5A?
X4163PIZ-4.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4163PIZ-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 X4163PIZ-4.5A?
For technical support, including X4163PIZ-4.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4163PIZ-4.5A requirements.
6.How does Aetrix verify that X4163PIZ-4.5A is sourced from the original manufacturer or authorized distributors?
All X4163PIZ-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 X4163PIZ-4.5A meets industry standards.
7.What is the process for return or replacement of X4163PIZ-4.5A?
All X4163PIZ-4.5A units undergo pre-shipment inspection (PSI). If there is an issue with X4163PIZ-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 X4163PIZ-4.5A part is unused and in its original packaging.
Return procedure for X4163PIZ-4.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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