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Renesas X4163PI-4.5A
- Part No.:
- X4163PI-4.5A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X4163PI-4.5A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,002
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Product details
Overview
X4163PI-4.5A from Xicor (now 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 factory-set 4.5 V reset threshold, 400 kHz I²C interface, <1 µA standby current with watchdog disabled, and 64-byte page write capability for nonvolatile storage.
For engineers reviewing the X4163PI-4.5A datasheet, X4163PI-4.5A pinout, X4163PI-4.5A application, or X4163PI-4.5A equivalent, key selection criteria include programmable VTRIP adjustment, block-lock EEPROM protection, watchdog timeout configurability, and compatibility with 2.7–5.5 V systems requiring robust brownout and firmware crash recovery.
Technical Context
The X4163PI-4.5A implements a dual-function reset architecture: power-on reset asserts RESET/RESET for 250 ms after VCC stabilization, while low-VCC detection holds RESET/RESET active until VCC exceeds 4.5 V and remains stable for 200 ms. The watchdog timer monitors SDA transitions during SCL HIGH and supports three timeout periods (200 ms, 600 ms, 1.4 s) via nonvolatile WD1/WD0 bits.
Its I²C-compatible 2-wire interface operates at up to 400 kHz, uses open-drain SDA/SCL with external pull-ups, and includes hardware write protection via WP pin and WPEN bit. EEPROM block lock is configurable across five granularity levels (none, first 64 B, 128 B, 256 B, 512 B, or full 2 KB array), and all nonvolatile writes are self-timed with typical 5 ms duration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.5 V nominal; factory-programmed trip point ensures deterministic system reset at defined supply margin |
| Watchdog Timeout | Selectable 200 ms / 600 ms / 1.4 s; prevents runaway code by forcing reset if SDA fails to toggle during SCL HIGH |
| EEPROM Capacity | 16 Kbit (2 KB × 8); stores calibration data, configuration, or firmware state without external memory |
| I²C Interface Speed | 400 kHz maximum; enables fast parameter updates and logging in resource-constrained microcontroller systems |
| Supply Voltage Range | 2.7 V to 5.5 V; supports operation across 3.3 V and 5 V logic domains without level shifting |
| Standby Current | <1 µA with watchdog disabled; minimizes battery drain in always-on monitoring applications |
| Reset Pulse Width | 250 ms minimum after power-up; guarantees sufficient time for oscillator stabilization and FPGA configuration |
Pinout & Package
Package: 8-lead JEDEC SOIC (3.9 mm × 4.9 mm, 1.27 mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SOIC) | S0 | Device select input; sets LSB of I²C slave address (A0 = 0 when S0 = LOW) |
| 2 (SOIC) | S1 | Device select input; sets MSB of I²C slave address (A1 = 0 when S1 = LOW) |
| 3 (SOIC) | RESET/RESET | Active-low/open-drain reset output; asserted during power-up, brownout, or watchdog timeout |
| 4 (SOIC) | VSS | Ground reference; must be connected to system common ground plane |
| 5 (SOIC) | SDA | Serial data line; bidirectional, open-drain I²C bus interface requiring external pull-up resistor |
| 6 (SOIC) | SCL | Serial clock input; master-generated timing signal for I²C read/write operations |
| 7 (SOIC) | WP | Write protect input; enables hardware lock of EEPROM blocks when WP = HIGH and WPEN = 1 |
| 8 (SOIC) | VCC | Positive supply input; powers all internal circuits including reset generator, watchdog, and EEPROM |
Key Features
| Feature | Design Value |
|---|---|
| Programmable VTRIP | Factory-set to 4.5 V but reprogrammable to custom thresholds using VP on WP pin and controlled VCC sequence |
| Block Lock Protection | Five selectable EEPROM protection granularities (none, 64 B, 128 B, 256 B, 512 B, or full 2 KB) via nonvolatile BP2–BP0 bits |
| Self-Timed EEPROM Writes | 5 ms typical internal write cycle; eliminates need for host MCU to manage timing or polling overhead |
| Power-Up Reset Timing | 250 ms guaranteed reset assertion; ensures reliable initialization of microcontrollers and FPGAs |
| Low-Voltage Detection Down to 1 V | RESET/RESET remains active until VCC ≥ 4.5 V + 200 ms stability; prevents erratic operation during brownout recovery |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
|
Use Scenario: Monitors 5 V supply rail and detects undervoltage events during motor actuation or sensor sampling. IC Role / Device Role / Timing Role: CPU supervisor providing brownout reset and watchdog supervision to prevent firmware lockup during critical delivery sequences. Use Value: Ensures deterministic restart and preserves infusion history in EEPROM even during brief AC dropout or battery sag. |
Use Scenario: Maintains calibrated dosing parameters and fault logs across power cycles in Class II medical equipment. IC Role / Device Role / Timing Role: Integrated reset + EEPROM storing calibration coefficients and usage counters with hardware write lock. Use Value: Eliminates external reset IC and serial EEPROM, reducing BOM count and board area while meeting IEC 60601-1 safety requirements. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: Supervises 3.3 V microcontroller supply in door module exposed to load dump and cold crank conditions. IC Role / Device Role / Timing Role: Dual-threshold reset generator (4.5 V trip) combined with watchdog to recover from CAN bus interrupt storms. Use Value: Prevents spurious resets during transient overvoltage while ensuring fail-safe shutdown below safe operating voltage. |
Use Scenario: Logs tamper events, metering intervals, and firmware version in utility-grade electricity meters with 10+ year data retention. IC Role / Device Role / Timing Role: Nonvolatile memory + reset supervisor enabling secure, long-term data storage with power-fail write abort protection. Use Value: Guarantees EEPROM write completion before VCC drops below 1 V, preserving billing integrity during grid instability. |
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 programming; 1 Kbit EEPROM; 100 kHz I²C only | Limited to low-voltage microcontrollers; insufficient EEPROM for complex configuration storage | Choose when cost sensitivity outweighs programmability and memory size needs |
| STM8S105K4T6C | MCU with embedded 2 KB EEPROM and software-configurable reset/watchdog; requires firmware development | Demands full firmware integration; lacks dedicated hardware reset timing precision and brownout hysteresis | Prefer when system already uses STM8 and firmware resources allow custom supervision logic |
Compared with MAX6361KA29+T and STM8S105K4T6C, the X4163PI-4.5A delivers guaranteed 4.5 V reset accuracy, field-adjustable trip voltage, and larger EEPROM-enabling drop-in replacement in legacy designs without MCU code changes or layout revision.
Availability
X4163PI-4.4.5A is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, automotive body control modules, smart energy meters, and embedded telemetry gateways requiring stable component supply and long-lifecycle support.
Supply support for X4163PI-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 reliability, low-power design, and system integration.
The X4163/5 product line was designed to consolidate reset, watchdog, voltage monitoring, and EEPROM functions into one die-targeting cost-sensitive, space-constrained embedded systems where board real estate and BOM simplification are critical.
FAQ
What is the factory-programmed reset threshold voltage for the X4163PI-4.5A?
The X4163PI-4.5A is shipped with a factory-set VTRIP of 4.5 V nominal. This threshold is laser-trimmed during production and remains stable over temperature and time unless reprogrammed using the documented VP-assisted procedure. The device guarantees reset assertion when VCC falls below this value and release only after VCC exceeds it for 200 ms.
Can the watchdog timeout period of the X4163PI-4.5A be changed after soldering to the PCB?
Yes, the watchdog timeout period of the X4163PI-4.5A can be reconfigured in-system via its I²C interface. The WD1 and WD0 bits in the nonvolatile control register (address FFFFh) determine the timeout: 200 ms, 600 ms, 1.4 s, or disabled. Writing requires a three-step sequence (WEL → RWEL → data) and persists across power cycles.
Does the X4163PI-4.5A support standard I²C addressing without external jumpers?
Yes, the X4163PI-4.5A uses standard 7-bit I²C addressing with base identifier '1010' and two device-select bits (S0, S1). With both S0 and S1 tied LOW, the slave address is 0xA0 (write) / 0xA1 (read). No external jumpers or resistors are needed for basic operation-only pull-up resistors on SDA and SCL are required per I²C specification.
How does the X4163PI-4.5A protect EEPROM contents during power failure?
The X4163PI-4.5A protects EEPROM during power failure through multiple mechanisms: (1) RESET/RESET activation below 1 V halts all bus activity; (2) in-progress writes complete before reset assertion; (3) WEL latch disables writes when VCC is unstable; and (4) Block Lock bits prevent accidental overwrites. These ensure data integrity even during abrupt brownout events.
Is the X4163PI-4.5A pin-compatible with other devices in the X4163/X4165 family?
Yes, the X4163PI-4.5A shares identical pinout and electrical characteristics with all X4163 variants (e.g., X4163PI-2.6A, X4163PI-3.0A) and the X4165 series in SOIC and TSSOP packages. Differences are limited to factory-programmed VTRIP values and RESET/RESET polarity (X4163 = active-low, X4165 = active-high), requiring no PCB change for voltage-threshold swaps.
X4163PI-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
X4163PI-4.5A FAQ
1.How can I place an order for X4163PI-4.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for X4163PI-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 X4163PI-4.5A reliable?
The price and inventory of X4163PI-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 X4163PI-4.5A is usually 5 days.
3.What payment methods are accepted for X4163PI-4.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4163PI-4.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4163PI-4.5A?
X4163PI-4.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4163PI-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 X4163PI-4.5A?
For technical support, including X4163PI-4.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4163PI-4.5A requirements.
6.How does Aetrix verify that X4163PI-4.5A is sourced from the original manufacturer or authorized distributors?
All X4163PI-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 X4163PI-4.5A meets industry standards.
7.What is the process for return or replacement of X4163PI-4.5A?
All X4163PI-4.5A units undergo pre-shipment inspection (PSI). If there is an issue with X4163PI-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 X4163PI-4.5A part is unused and in its original packaging.
Return procedure for X4163PI-4.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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