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onsemi CAT1163WI-30
- Part No.:
- CAT1163WI-30
- Manufacturer:
- onsemi
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CAT1163WI-30.pdf
- Description:
- CAT1163 - SUPERVISORY CIRCUIT WI
- Quantity:
- Payment:
- Shipping:
Inventory:566
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Product details
Overview
CAT1163WI-30 from Catalyst Semiconductor is a supervisory IC integrating 16 Kb I²C EEPROM, precision reset controller with 3.00 V to 3.15 V threshold, watchdog timer (1.6 s timeout), and manual reset capability in an 8-pin SOIC package. It operates from 2.7 V to 6.0 V, supports 400 kHz I²C bus, and delivers hardware write protection via WP pin and VCC lockout for industrial microcontroller systems requiring reliable power-up sequencing and data integrity.
For engineers reviewing the CAT1163WI-30 datasheet, pinout, applications, or equivalent options, key selection criteria include its dual active-high/active-low reset outputs, 16-byte page write buffer, 1,000,000 program/erase cycles, 100-year data retention, and compatibility with 3V systems requiring brownout immunity and watchdog supervision.
Technical Context
The CAT1163WI-30 implements a precision voltage monitor with hysteresis (15 mV) and 200 ms power-up reset timeout (tPURST), ensuring stable microcontroller initialization across industrial temperature (–40°C to +85°C). Its watchdog logic monitors both WDI pin transitions and SDA activity, triggering reset if either remains static beyond 1.6 seconds.
EEPROM operation uses standard I²C protocol with slave address prefix 1010, supports byte and 16-byte page writes, and enforces hardware write protection when WP = VCC or VCC falls below 3.00 V. Reset outputs are open-drain, requiring external pull-up/pull-down resistors, and remain valid down to VCC = 1.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00 V to 3.15 V - precisely matches 3V system supply rails and ensures deterministic brownout detection without false triggers. |
| Watchdog Timeout | 1.6 s - provides sufficient margin for firmware recovery while preventing indefinite hang states in embedded control loops. |
| I²C Speed | 400 kHz - enables high-throughput configuration storage and telemetry logging without bus contention in real-time systems. |
| EEPROM Endurance | 1,000,000 cycles - supports frequent calibration updates or event logging in industrial monitoring applications. |
| Data Retention | 100 years - guarantees long-term validity of stored device parameters, calibration coefficients, or security keys without refresh. |
| Supply Range | 2.7 V to 6.0 V - allows direct integration into mixed-voltage designs including 3.3 V and 5 V domains without level-shifting. |
| Package | 8-pin SOIC (W) - surface-mount footprint compatible with automated PCB assembly and industrial thermal cycling requirements. |
Pinout & Package
8-pin SOIC (W) package per JEDEC MS-012, 150 mil width, NiPdAu lead finish, tape-and-reel packaging (GT3: 3,000 units/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: WDI | Watchdog Timer Input | Edge-triggered input; absence of transition >1.6 s forces system reset-used for software heartbeat monitoring. |
| 2: RESET | Active-High Reset Output/Input | Open-drain output; also accepts manual reset edge (low-to-high); requires external pull-down resistor. |
| 3: WP | Write Protect Control | High = full EEPROM read-only mode; low or floating = normal read/write-enables field-safe firmware update locks. |
| 4: GND | Ground Reference | Primary return path for reset outputs, I²C interface, and internal supervisor circuitry. |
| 5: SDA | I²C Bidirectional Data Line | Open-drain I/O; carries EEPROM data, addresses, and ACK/NACK; also serves as secondary watchdog input. |
| 6: SCL | I²C Clock Input | Master-generated clock synchronizing all EEPROM reads/writes and status polling operations. |
| 7: RESET | Active-Low Reset Output/Input | Open-drain output; also accepts manual reset edge (high-to-low); requires external pull-up resistor. |
| 8: VCC | Power Supply Input | 2.7–6.0 V supply; powers EEPROM, reset comparator, and watchdog; enables VCC-sense write protection below 3.00 V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual reset polarity outputs | Simultaneous active-high and active-low open-drain signals simplify interfacing to diverse MCU reset inputs without level translation. |
| VCC lockout write protection | Automatically disables EEPROM writes during power-up ramp and brownout-prevents corruption when supply is unstable. |
| 16-byte page write buffer | Reduces I²C transaction count by up to 16× versus byte writes-critical for minimizing bus occupancy in time-critical systems. |
| Manual reset debouncing | Internal 200 ms timeout on RESET/RESET pins eliminates switch bounce effects-no external RC filtering required. |
| Glitch-immune reset detection | 100 ns pulse rejection on reset inputs prevents spurious resets from EMI or noise transients on control lines. |
Applications
| Industrial PLC Controller | Medical Diagnostic Sensor Module |
|---|---|
|
Use Scenario: Power management and firmware recovery in programmable logic controllers operating in factory-floor environments with fluctuating 3.3 V supplies. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset, watchdog supervision, and nonvolatile parameter storage for runtime configuration. Use Value: Ensures deterministic boot sequence and automatic recovery from software hangs-reducing unplanned downtime in mission-critical automation. |
Use Scenario: Calibration data retention and safe power sequencing in portable ultrasound sensor modules powered from Li-ion batteries. IC Role / Device Role / Timing Role: Precision reset controller with 3.00–3.15 V threshold and 100-year EEPROM retention for critical calibration coefficients. Use Value: Guarantees traceable sensor accuracy over product lifetime without recalibration-even after extended storage or battery depletion events. |
| Smart Energy Meter | Automotive Body Control Module (BCM) |
|
Use Scenario: Tamper-resistant metering data logging and secure boot validation in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Hardware-enforced write protection (WP pin + VCC lockout) and I²C EEPROM for revenue-grade energy registers. Use Value: Prevents unauthorized firmware modification or EEPROM corruption during power interruptions-meeting ANSI/IEC tamper-evidence requirements. |
Use Scenario: Microcontroller supervision and configuration storage in 12 V automotive subsystems with wide-input DC-DC converters stepping to 3.3 V. IC Role / Device Role / Timing Role: Dual-reset-output supervisor with 1.6 s watchdog and industrial-temp SOIC package for under-hood reliability. Use Value: Maintains functional safety during cold-crank voltage dips and engine-run transients-ensuring BCM stays synchronized with CAN network timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822MUT+T | Single active-low reset only; no integrated EEPROM; 2.93 V threshold; 1.6 s watchdog; SOT23-6 package. | Lacks memory function-requires external EEPROM; smaller footprint but no data storage capability. | Select when only reset supervision is needed and board space is constrained; not suitable for integrated memory use cases. |
| STM8T142M2U6 | 32-bit ARM-based supervisor with 2 Kbytes EEPROM; 2.9 V threshold; 1.6 s watchdog; TSSOP-20 package. | Higher integration (MCU core + ADC + timers) but larger package and higher BOM cost; different programming model. | Choose for advanced diagnostics or firmware-controlled reset logic; avoid if simple, low-cost, drop-in supervision suffices. |
Compared with MAX6822MUT+T and STM8T142M2U6, CAT1163WI-30 uniquely combines 16 Kb I²C EEPROM, dual-polarity reset, and precise 3.00–3.15 V threshold in a compact SOIC-8-making it optimal for cost-sensitive, space-constrained 3V systems needing self-contained memory and supervision.
Availability
CAT1163WI-30 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic sensor modules, smart energy meters, automotive body control modules, and embedded telemetry loggers requiring stable component supply with guaranteed long-term availability.
Supply support for CAT1163WI-30 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
Catalyst Semiconductor was a fabless analog and mixed-signal IC designer specializing in power management, memory, and supervisory solutions before acquisition by ON Semiconductor in 2010.
The CAT1163 product line was engineered for microcontroller-based systems needing integrated memory, reset supervision, and watchdog functionality-targeting industrial, medical, and metering applications where reliability and long-term data integrity are critical.
FAQ
What is the exact reset threshold voltage range for CAT1163WI-30?
The CAT1163WI-30 has a factory-trimmed reset threshold range of 3.00 V to 3.15 V, specifically designed for 3V nominal systems. This range ensures robust brownout detection without false triggering during normal 3.3V rail tolerances. The hysteresis is 15 mV, and reset becomes inactive 200 ms after VCC exceeds the upper threshold. This specification is confirmed in the "RESET CIRCUIT CHARACTERISTICS" table on page 4 of the CAT1163 datasheet (Doc. No. 3003 Rev. E).
Does CAT1163WI-30 support both active-high and active-low reset outputs simultaneously?
Yes, CAT1163WI-30 provides two independent open-drain reset outputs: pin 2 (RESET, active-high) and pin 7 (RESET, active-low). Both are asserted simultaneously during power-up, brownout, or watchdog timeout. Each requires its own external pull-up (for pin 7) or pull-down (for pin 2) resistor. This dual-polarity design eliminates level-shifting components when interfacing with MCUs that accept either reset polarity, as documented in the "PIN FUNCTIONS" section on page 2 of the datasheet.
How does the watchdog timer function in CAT1163WI-30, and can it be disabled?
The CAT1163WI-30 watchdog timer triggers a reset after 1.6 seconds of inactivity on either the WDI pin or the SDA line. It cannot be permanently disabled in hardware-only temporarily cleared by any edge transition. The timer remains suspended while any reset output is asserted. There is no register or pin to disable the watchdog; its presence is inherent to the device architecture, as described in the "Watchdog Timer" section on page 5 of the datasheet.
What EEPROM write protection mechanisms are implemented in CAT1163WI-30?
CAT1163WI-30 implements two hardware write protection mechanisms: (1) the WP pin-if tied to VCC, the entire 16 Kb EEPROM becomes read-only; (2) VCC lockout-if VCC drops below 3.00 V during power-down or hasn't yet reached 3.00 V during power-up, all write attempts are ignored and no ACK is returned. Both features operate independently and are detailed in the "Hardware Data Protection" section on page 6 of the datasheet.
Is CAT1163WI-30 RoHS-compliant and what is its lead finish?
Yes, CAT1163WI-30 is RoHS-compliant (lead-free and halogen-free) with a NiPdAu lead finish, as specified in the ordering information footnote (3) on page 13 of the datasheet. The "G" suffix in CAT1163WI-30-GT3 explicitly denotes the NiPdAu finish, which is offered only on green packages. This finish improves solderability and wire-bond reliability compared to standard matte-tin finishes.
CAT1163WI-30 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- 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:
- 3V, 3.15V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High/Active Low
- Reset Timeout:
- 130ms Minimum
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
CAT1163WI-30 FAQ
1.How can I place an order for CAT1163WI-30 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAT1163WI-30 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 CAT1163WI-30 reliable?
The price and inventory of CAT1163WI-30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAT1163WI-30 is usually 5 days.
3.What payment methods are accepted for CAT1163WI-30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAT1163WI-30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAT1163WI-30?
CAT1163WI-30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAT1163WI-30 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 CAT1163WI-30?
For technical support, including CAT1163WI-30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAT1163WI-30 requirements.
6.How does Aetrix verify that CAT1163WI-30 is sourced from the original manufacturer or authorized distributors?
All CAT1163WI-30 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 CAT1163WI-30 meets industry standards.
7.What is the process for return or replacement of CAT1163WI-30?
All CAT1163WI-30 units undergo pre-shipment inspection (PSI). If there is an issue with CAT1163WI-30, 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 CAT1163WI-30 part is unused and in its original packaging.
Return procedure for CAT1163WI-30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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