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onsemi CAT809VTBI-GT3
- Part No.:
- CAT809VTBI-GT3
- Manufacturer:
- onsemi
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
CAT809VTBI-GT3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,840
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Product details
Overview
CAT809VTBI-GT3 from onsemi is a 3-pin SOT-23 push-pull active-low microprocessor supervisory IC monitoring +2.5 V power supplies at −5% threshold (2.32 V), with 140–460 ms reset timeout, 6 µA supply current, and guaranteed reset validity down to VCC = 1.0 V - used in embedded control systems for reliable power-on reset sequencing.
For engineers reviewing the CAT809VTBI-GT3 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, industrial-temperature operation (−40°C to +85°C), SOT-23 package mapping, and direct MAX809-compatible replacement guidance without inference or generic claims.
Technical Context
The CAT809VTBI-GT3 implements a precision bandgap voltage reference and digital delay circuit to assert RESET low when VCC drops below 2.32 V (Z threshold), holding it low for ≥140 ms after VCC recovers above threshold. Its push-pull output drives logic-level loads directly without external pull-up resistors.
It features transient immunity against ≤4 µs, 100 mV VCC dips and maintains valid RESET state down to 1.0 V VCC via internal biasing - enabling robust brownout detection in battery-backed or low-voltage microcontroller systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32 V ±30 mV (Z suffix); precise for +2.5 V rail monitoring at −5% tolerance |
| Reset Timeout | 140–460 ms; ensures sufficient hold time for CPU initialization before release |
| Supply Current | 6 µA typical; enables ultra-low-power operation in always-on supervisory roles |
| Operating Temp | −40°C to +85°C; validated for industrial-grade embedded equipment deployment |
| VCC Range | 1.2–5.5 V; supports wide input range while maintaining reset assertion integrity |
| Output Type | Push-pull active-low; eliminates need for external pull-up and interfaces directly with CMOS inputs |
| Reset Validity | Down to VCC = 1.0 V; guarantees known RESET state during deep brownout or power collapse |
Pinout & Package
Supplied in compact 3-pin SOT-23 package (Case 527AG), 1.4 mm × 2.9 mm footprint, Pb-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal voltage reference and output stage |
| 2 | RESET | Active-low push-pull output; sinks ≥1.2 mA, sources ≥500 µA, valid down to VCC = 1.0 V |
| 3 | VCC | Monitored power supply input; also powers internal circuitry and output driver |
Key Features
| Feature | Design Value |
|---|---|
| Precision Z-threshold (2.32 V) | Enables accurate supervision of +2.5 V rails with ±30 mV tolerance over full temperature range |
| 140 ms minimum reset timeout | Guarantees sufficient reset hold time for ARM Cortex-M or PIC microcontrollers to complete boot initialization |
| 6 µA quiescent current | Minimizes standby power draw in battery-powered IoT nodes and portable instrumentation |
| VCC = 1.0 V reset validity | Ensures deterministic reset behavior during severe undervoltage events without external pull-down |
| Transient immunity (≤4 µs, 100 mV) | Rejects switching noise from DC-DC converters or motor drivers without false triggering |
Applications
| Industrial PLC Controllers | Smart Energy Meters |
|---|---|
Use Scenario: Power-up sequencing in DIN-rail mounted programmable logic controllers exposed to wide ambient temperature swings and line transients. IC Role / Device Role / Timing Role: Supervises 2.5 V FPGA configuration rail and asserts synchronous reset to prevent metastability during cold start. Use Value: 140–460 ms timeout accommodates slow-ramping isolated DC-DC outputs; 2.32 V threshold matches LDO dropout margin. |
Use Scenario: Tamper-resistant metering units requiring fail-safe reset under battery backup and AC mains brownouts. IC Role / Device Role / Timing Role: Monitors auxiliary 2.5 V RTC/sensor rail and holds MCU in reset until stable, even during 100 ms grid sags. Use Value: Valid RESET down to VCC = 1.0 V ensures deterministic behavior during transition to battery-only operation. |
| Medical Diagnostic Handhelds | Wireless Baseband Modules |
Use Scenario: Portable ultrasound or glucose analyzers powered by single-cell Li-ion with variable discharge profile. IC Role / Device Role / Timing Role: Resets application processor when battery voltage falls below 2.32 V, preventing corrupted memory writes during shutdown. Use Value: 6 µA supply current extends usable battery life between calibrations; SOT-23 footprint saves PCB area in tight enclosures. |
Use Scenario: LTE/5G small cell baseband processors subject to high-frequency supply ripple from RF power amplifiers. IC Role / Device Role / Timing Role: Provides clean, glitch-free reset signal immune to 4 µs/100 mV transients on 2.5 V core supply. Use Value: Push-pull output drives high-capacitance reset bus directly; no external components required for noise margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | Same 2.32 V threshold, 140 ms timeout, SOT-23-3, but higher 15 µA supply current and −40°C to +125°C rating | Valid for extended-temperature automotive modules where CAT809VTBI-GT3's +85°C limit is insufficient | Select MAX809TRD3-T only if operating above +85°C is required; otherwise CAT809VTBI-GT3 offers lower quiescent current |
| TPS3808G01DBVR | Adjustable threshold (0.4–5.8 V) via external resistor divider; 350 ms fixed timeout; 1.8 µA typical ICC; SOT-23-6 | Requires additional passives and board space; suited for multi-rail systems needing custom trip points | Choose TPS3808G01DBVR only when non-standard thresholds or dual-supply monitoring are needed; CAT809VTBI-GT3 is simpler and smaller for fixed 2.32 V use |
Compared with MAX809TRD3-T and TPS3808G01DBVR, the CAT809VTBI-GT3 delivers optimal balance of ultra-low ICC (6 µA), industrial-temperature reliability, and zero-component simplicity for fixed +2.5 V supervision - making it preferred for cost-sensitive, space-constrained embedded designs where extended temp or adjustability are unnecessary.
Availability
CAT809VTBI-GT3 is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy meters, medical handheld diagnostics, and wireless baseband modules requiring stable component supply across long production lifecycles.
Supply support for CAT809VTBI-GT3 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
onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The CAT809VTBI-GT3 belongs to onsemi's microprocessor supervisory IC product line, engineered specifically for reliable, low-power reset generation in industrial and embedded systems operating across −40°C to +85°C.
FAQ
What is the exact reset threshold voltage of CAT809VTBI-GT3 and how is it specified?
The CAT809VTBI-GT3 has a nominal reset threshold of 2.32 V (Z suffix), with guaranteed tolerance of ±30 mV over the full industrial temperature range (−40°C to +85°C). This value is factory-trimmed using onsemi's floating-gate Analog EEPROM technology and is explicitly defined in Table 4 of the official datasheet under "Z Threshold" conditions.
Does CAT809VTBI-GT3 require an external pull-up resistor on its RESET pin?
No - CAT809VTBI-GT3 features a push-pull active-low RESET output, meaning it actively drives both HIGH and LOW states internally. Unlike open-drain variants (e.g., CAT803), CAT809VTBI-GT3 requires no external pull-up resistor and interfaces directly with standard CMOS inputs.
What is the minimum VCC voltage at which CAT809VTBI-GT3 guarantees valid RESET output state?
CAT809VTBI-GT3 guarantees valid RESET output behavior down to VCC = 1.0 V, as confirmed in the "Valid RESET with VCC Under 1.0 V" section (page 7) and Electrical Characteristics table (page 4). Below 1.0 V, a 10 kΩ pull-down is recommended - but the device itself remains functional and deterministic to 1.0 V.
Is CAT809VTBI-GT3 a direct replacement for MAX809 in industrial applications?
Yes - the datasheet explicitly states CAT809VTBI-GT3 is a direct replacement for MAX809 in applications operating over the industrial temperature range (−40°C to +85°C), matching pinout, threshold, timing, and output drive characteristics. It replaces MAX809ZTRG+ and equivalent Z-threshold variants.
What package type and marking code does CAT809VTBI-GT3 use?
CAT809VTBI-GT3 is supplied in the 3-pin SOT-23 package (Case 527AG) with Pb-free/Halide-free finish. Its top-side marking is "VLA", as documented in Table 5 of the datasheet, and it ships in 3000-piece tape-and-reel format (GT3).
CAT809VTBI-GT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.6V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
CAT809VTBI-GT3 FAQ
1.How can I place an order for CAT809VTBI-GT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAT809VTBI-GT3 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 CAT809VTBI-GT3 reliable?
The price and inventory of CAT809VTBI-GT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAT809VTBI-GT3 is usually 5 days.
3.What payment methods are accepted for CAT809VTBI-GT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAT809VTBI-GT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAT809VTBI-GT3?
CAT809VTBI-GT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAT809VTBI-GT3 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 CAT809VTBI-GT3?
For technical support, including CAT809VTBI-GT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAT809VTBI-GT3 requirements.
6.How does Aetrix verify that CAT809VTBI-GT3 is sourced from the original manufacturer or authorized distributors?
All CAT809VTBI-GT3 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 CAT809VTBI-GT3 meets industry standards.
7.What is the process for return or replacement of CAT809VTBI-GT3?
All CAT809VTBI-GT3 units undergo pre-shipment inspection (PSI). If there is an issue with CAT809VTBI-GT3, 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 CAT809VTBI-GT3 part is unused and in its original packaging.
Return procedure for CAT809VTBI-GT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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