My Inquiry
My Account
Diodes Incorporated APX803-46SRG-7
- Part No.:
- APX803-46SRG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803-46SRG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R
- Quantity:
- Payment:
- Shipping:
Inventory:3,153
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803-46SRG-7 from Diodes Incorporated is a 3-pin microprocessor reset supervisor IC with 4.63V reset threshold, open-drain active-low RESET output, and 200ms typical reset timeout period. It monitors 5V power supplies in embedded microcontroller systems, asserting reset during power-up, brownout, or supply glitches to ensure deterministic startup in industrial controllers and portable instrumentation.
For engineers reviewing the APX803-46SRG-7 datasheet, APX803-46SRG-7 pinout, APX803-46SRG-7 application, or APX803-46SRG-7 equivalent, key selection criteria include reset threshold accuracy (±0.07V), guaranteed operation down to VCC = 1V, low 30µA supply current, and SOT23-SR package compatibility with space-constrained PCB layouts.
Technical Context
The APX803-46SRG-7 implements a precision voltage comparator with 40mV hysteresis and internal timing circuitry to generate a fixed-duration reset pulse after VCC rises above 4.63V. Its open-drain output interfaces directly with bidirectional µP reset pins using a single external pull-up resistor.
Designed for operation across -40°C to +85°C ambient, it guarantees valid reset assertion for VCC ≥ 1V and ignores fast transients on VCC via built-in noise immunity. The device requires no external components and draws only 30µA typical supply current at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (typical), ±0.07V tolerance - ensures reliable detection of 5V supply brownout before µP malfunctions |
| Reset Timeout | 200ms (typical) - provides sufficient hold time for full µP initialization and peripheral stabilization |
| Supply Current | 30µA (typical) - enables use in battery-powered equipment with multi-year standby life |
| Operating Voltage Range | 1.1V to 5.5V - supports valid reset assertion even during deep brownout down to 1V VCC |
| Output Type | Open-drain active-low - allows wired-OR reset bus configuration and level-shifting across supply domains |
| Temperature Range | -40°C to +85°C - qualified for industrial ambient conditions without derating |
| Hysteresis | 40mV - prevents reset chatter during slow VCC recovery near threshold |
Pinout & Package
APX803-46SRG-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SR) package with gull-wing leads, optimized for automated placement and reflow soldering on high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal comparator and output driver; must connect to system ground plane for noise immunity |
| 2 (VCC) | Supply Input | Monitored power rail input; powers internal circuitry and defines reset detection threshold reference |
| 3 (RESET) | Open-Drain Output | Active-low reset signal; requires external pull-up to monitored or target supply; sinks up to 3.5mA |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | Guaranteed ±0.07V tolerance over temperature ensures consistent 5V supply monitoring without calibration |
| 200ms reset timeout | Fixed delay meets µP reset timing requirements for full clock stabilization and register initialization |
| Open-drain output stage | Enables shared reset bus architecture and voltage-level translation between disparate supply domains |
| 1V minimum VCC operation | Maintains valid reset state during deep brownout, preventing premature µP release before supply recovery |
| No external components | Reduces BOM count and layout area; eliminates trimming resistors or capacitors required by discrete solutions |
Applications
| Industrial PLC Controllers | Portable Medical Instruments |
|---|---|
Use Scenario: Power sequencing and brownout protection in programmable logic controller CPU modules operating from unregulated 5V rails. IC Role / Device Role / Timing Role: Supervises main 5V supply and asserts reset to ARM Cortex-M7 core until stable clock and memory initialization complete. Use Value: Prevents firmware corruption during factory floor voltage sags by holding reset for 200ms after VCC exceeds 4.63V. | Use Scenario: Battery-backed handheld diagnostic devices requiring ultra-low quiescent current during sleep mode. IC Role / Device Role / Timing Role: Monitors 5V DC-DC output powering ADC and display controller; resets system on battery voltage drop below safe operating level. Use Value: 30µA supply current extends battery life by >2 years in standby; open-drain output interfaces cleanly with 3.3V logic MCU. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Reset supervision for microcontrollers in non-safety-critical body electronics exposed to load-dump transients. IC Role / Device Role / Timing Role: Detects 5V supply collapse during alternator regulation failure and holds reset until stable post-transient recovery. Use Value: 40mV hysteresis prevents false resets during transient spikes; guaranteed operation to -40°C supports under-hood deployment. | Use Scenario: Power monitoring in DIN-rail mounted electricity meters with isolated 5V auxiliary supply. IC Role / Device Role / Timing Role: Provides clean reset to metering SoC during AC mains interruption or transformer dropout events. Use Value: Valid reset assertion down to VCC = 1V ensures deterministic behavior during slow decay of bulk capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803-46SAG-7 | SOT23-SA package (different pinout: GND-VCC-RESET vs. GND-VCC-RESET in SR); identical electrical specs | Requires PCB footprint revision; SA variant uses different pad layout per Diodes package outline | Select SA only when redesigning board layout to match SA thermal pad geometry |
| TPS3808G33DBVR | 3.3V threshold, 200ms timeout, push-pull output, higher 12µA max ICC | Not suitable for 5V monitoring; requires level-shifting for bidirectional reset buses | Choose only if system uses 3.3V supply and push-pull drive is preferred over open-drain flexibility |
Compared with APX803-46SAG-7, the SR variant offers identical reset performance but requires verification of SOT23-SR land pattern; versus TPS3808G33DBVR, APX803-46SRG-7 provides correct 4.63V threshold for 5V systems and open-drain compatibility with legacy µP reset architectures.
Availability
APX803-46SRG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical instruments, and smart energy meters requiring stable component supply with long-term lifecycle support.
Supply support for APX803-46SRG-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 requiring precision voltage monitoring and robust noise immunity.
FAQ
What is the exact reset threshold voltage for APX803-46SRG-7?
The APX803-46SRG-7 has a nominal reset threshold of 4.63V, with guaranteed limits of 4.56V (min) and 4.70V (max) across -40°C to +85°C ambient temperature. This value is laser-trimmed during production and specified in the Electrical Characteristics table of DS32131 Rev. 3-3.
Does APX803-46SRG-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain active-low and must be pulled up externally to a valid logic-high voltage (typically the same VCC being monitored or a separate logic supply). A standard 10kΩ resistor to 5V is recommended for most µP interfaces per the Typical Applications Circuit in the datasheet.
Can APX803-46SRG-7 operate reliably below 1.1V VCC?
No - while the RESET output remains valid down to VCC = 1V, the Absolute Maximum Ratings specify a minimum operating VCC of 1.1V. Operation below 1.1V violates recommended conditions and may result in undefined comparator behavior or incomplete internal biasing.
Is APX803-46SRG-7 pin-compatible with APX803D-29SRG-7?
No - although both use the SOT23-SR package and share identical pinout (GND-VCC-RESET), they differ in reset threshold (4.63V vs. 2.93V) and timeout duration (200ms vs. 1ms). Substituting one for the other will cause incorrect reset timing or failure to detect supply faults.
APX803-46SRG-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:
- SOT23R
APX803-46SRG-7 FAQ
1.How can I place an order for APX803-46SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803-46SRG-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 APX803-46SRG-7 reliable?
The price and inventory of APX803-46SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803-46SRG-7 is usually 5 days.
3.What payment methods are accepted for APX803-46SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803-46SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803-46SRG-7?
APX803-46SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803-46SRG-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 APX803-46SRG-7?
For technical support, including APX803-46SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803-46SRG-7 requirements.
6.How does Aetrix verify that APX803-46SRG-7 is sourced from the original manufacturer or authorized distributors?
All APX803-46SRG-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 APX803-46SRG-7 meets industry standards.
7.What is the process for return or replacement of APX803-46SRG-7?
All APX803-46SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803-46SRG-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 APX803-46SRG-7 part is unused and in its original packaging.
Return procedure for APX803-46SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803-46SRG-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…
