My Inquiry
My Account
Diodes Incorporated APX803-46SAG-7
- Part No.:
- APX803-46SAG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803-46SAG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803-46SAG-7 from Diodes Incorporated is a 3-pin microprocessor reset supervisor IC with 4.63V reset threshold, open-drain active-low RESET output, 200ms typical reset timeout, 30µA typical supply current, and guaranteed operation down to VCC = 1V. It monitors 5V power rails in embedded controllers and portable systems to prevent erroneous microprocessor startup during brownout or power-up transients.
For engineers reviewing the APX803-46SAG-7 datasheet, APX803-46SAG-7 pinout, APX803-46SAG-7 application, or APX803-46SAG-7 equivalent, this page delivers verified electrical parameters, SOT23 package mapping, functional pin roles, real-world use cases, and validated alternative parts for industrial and battery-powered designs.
Technical Context
The APX803-46SAG-7 implements a precision voltage comparator with 4.63V ±0.07V threshold (2.93V hysteresis), internal timing circuitry generating a fixed 140–280ms reset pulse after VCC recovery, and an open-drain N-channel output stage capable of sinking ≥1.2mA at VCC ≥ VTH − 0.2V. Its design ignores fast VCC transients and guarantees valid logic state down to 1V supply.
It operates across −40°C to +85°C ambient, draws ≤40µA max supply current, and features thermal resistance θJA = 201°C/W in SOT23. The device requires no external components and interfaces directly with bidirectional µP reset pins via a single pull-up resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.56V min / 4.63V typ / 4.70V max - ensures reliable reset assertion before 5V rail collapse |
| Reset Timeout | 140ms min / 200ms typ / 280ms max - holds µP in reset long enough for stable clock and supply settling |
| Supply Current | 30µA typ / 40µA max - enables multi-year battery life in portable monitoring devices |
| VCC Operating Range | 1.1V to 5.5V - supports valid reset signaling even during deep brownout down to 1V |
| Output Type | Open-drain active-low - allows wired-OR reset bus sharing and level-shifting across supply domains |
| Reset Hysteresis | 40mV - prevents chatter during slow VCC recovery near threshold |
| ESD Rating | 2kV HBM - provides robust handling in manual assembly and field service environments |
Pinout & Package
SOT23-3 (SA package) surface-mount package with 2.4mm × 1.3mm footprint, 0.95mm height, and RoHS-compliant "Green" molding compound (Br/Cl <900ppm, Sb <1000ppm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return for internal comparator and output driver |
| 2 | VCC | Monitored power supply input; powers internal circuitry and defines reset threshold reference |
| 3 | RESET | Open-drain active-low output; sinks current to assert reset on connected µP or logic |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | ±0.07V tolerance over temperature ensures consistent reset point across −40°C to +85°C |
| Fixed 200ms reset timeout | Guarantees sufficient hold time for 5V system clocks and memory initialization before release |
| No external components required | Reduces BOM count and PCB area vs. discrete RC-based reset circuits |
| Valid reset down to VCC = 1V | Prevents undefined µP behavior during deep undervoltage conditions where core logic fails |
| Open-drain output with 1.2mA sink capability | Enables flexible pull-up to any logic rail (3.3V, 5V, or mixed-voltage systems) |
Applications
| Industrial PLC Controllers | Portable Data Loggers |
|---|---|
Use Scenario: Power cycling in remote sensor nodes powered by Li-ion batteries with variable discharge profiles. IC Role / Device Role / Timing Role: Monitors 5V DC-DC output and asserts reset if voltage drops below 4.63V during battery sag or cold-temperature derating. Use Value: Prevents firmware corruption during brownout by holding µC in reset until regulated 5V rail stabilizes above threshold for ≥140ms. |
Use Scenario: Intermittent GPS+cellular telemetry units operating on primary alkaline cells. IC Role / Device Role / Timing Role: Supervises main 5V supply derived from boost converter; triggers reset on load-induced voltage dip during RF transmission burst. Use Value: Ensures clean boot after power interruption without requiring external capacitor timing network or calibration. |
| Medical Diagnostic Handhelds | Smart Energy Meters |
Use Scenario: Battery-backed clinical analyzers performing rapid electrochemical assays. IC Role / Device Role / Timing Role: Provides deterministic reset initiation when main 5V rail falls below 4.63V due to high-current sensor activation. Use Value: Eliminates risk of partial register writes or corrupted ADC calibration sequences during transient undervoltage. |
Use Scenario: DIN-rail mounted meters with isolated 5V auxiliary supply powering metrology SoC. IC Role / Device Role / Timing Role: Resets metering processor upon AC line dropout or surge-induced DC rail collapse. Use Value: Guarantees restart only after stable 5V rail recovery, avoiding spurious energy accumulation errors during reset window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809-46SA-7 | Push-pull (not open-drain) RESET output; same 4.63V threshold and 200ms timeout | Requires no external pull-up; incompatible with wired-OR reset buses or level-shifting | Select when driving single-load µP with dedicated reset line and no shared bus requirement |
| MAX809SEUR+T | 4.63V threshold, 140ms min timeout, push-pull output, 2.5µA max ICC | Lower quiescent current but lacks open-drain flexibility; not drop-in compatible due to different pinout (VCC/RESET/GND vs. GND/VCC/RESET) | Choose for ultra-low-power applications where reset bus sharing is unnecessary and pinout redesign is acceptable |
Compared with APX809-46SA-7 and MAX809SEUR+T, the APX803-46SAG-7 uniquely supports multi-device reset coordination via open-drain topology while maintaining identical threshold accuracy and timeout stability across temperature - critical for systems with mixed-supply µPs or legacy controller interfaces.
Availability
APX803-46SAG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable data loggers, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for APX803-46SAG-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial and consumer markets.
The APX803 series belongs to Diodes' supervisory IC product line, designed specifically for cost-sensitive, space-constrained microprocessor reset applications in battery-powered and embedded control systems.
FAQ
What is the exact reset threshold voltage for APX803-46SAG-7?
The APX803-46SAG-7 has a guaranteed reset threshold of 4.56V minimum, 4.63V typical, and 4.70V maximum at +25°C, with ±30ppm/°C tempco and 40mV hysteresis. This ensures precise 5V rail monitoring across industrial temperature ranges without calibration.
Can APX803-46SAG-7 drive multiple microcontrollers on a shared reset bus?
Yes - its open-drain active-low RESET output allows direct wired-OR connection with other open-drain reset sources (e.g., watchdog timers or other supervisors). A single pull-up resistor to the target logic rail enables coordinated reset assertion across multiple devices.
Does APX803-46SAG-7 remain functional when VCC drops below 1.1V?
No - the device guarantees valid RESET output only down to VCC = 1V. Below 1V, the internal circuitry ceases to sink current, and RESET becomes high-impedance. This aligns with typical µP shutdown behavior, as most processors are nonfunctional below 1V.
Is APX803-46SAG-7 pin-compatible with APX803-46SRG-7?
Yes - both use the same SOT23-3 footprint and identical pinout (GND/VCC/RESET), differing only in package variant (SA vs. SR) and marking code. SA and SR variants share identical electrical specifications and thermal performance per Diodes' package outline documentation.
APX803-46SAG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain or Open Collector
- 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
APX803-46SAG-7 FAQ
1.How can I place an order for APX803-46SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803-46SAG-7 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 APX803-46SAG-7 reliable?
The price and inventory of APX803-46SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803-46SAG-7 is usually 5 days.
3.What payment methods are accepted for APX803-46SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803-46SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803-46SAG-7?
APX803-46SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803-46SAG-7 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 APX803-46SAG-7?
For technical support, including APX803-46SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803-46SAG-7 requirements.
6.How does Aetrix verify that APX803-46SAG-7 is sourced from the original manufacturer or authorized distributors?
All APX803-46SAG-7 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 APX803-46SAG-7 meets industry standards.
7.What is the process for return or replacement of APX803-46SAG-7?
All APX803-46SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803-46SAG-7, 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 APX803-46SAG-7 part is unused and in its original packaging.
Return procedure for APX803-46SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803-46SAG-7 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
