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Diodes Incorporated APX803-23SRG-7
- Part No.:
- APX803-23SRG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803-23SRG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R
- Quantity:
- Payment:
- Shipping:
Inventory:197
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Product details
Overview
APX803-23SRG-7 from Diodes Incorporated is a 3-pin microprocessor reset supervisor IC with 2.25 V reset threshold, open-drain active-low RESET output, and 200 ms typical reset timeout period. It monitors VCC supply voltage in 3.3 V and 5 V digital systems, asserts reset on power-up and brownout, and guarantees valid reset operation down to VCC = 1 V. Used in portable controllers and embedded microcontroller systems requiring reliable power-on initialization.
For engineers reviewing the APX803-23SRG-7 datasheet, APX803-23SRG-7 pinout, APX803-23SRG-7 application, or APX803-23SRG-7 equivalent, this page provides verified functional identity, SOT23-SR package mapping, reset timing behavior, supply current (30 µA typ), and direct alternatives for 2.25 V threshold supervisory use cases.
Technical Context
The APX803-23SRG-7 implements a precision voltage comparator with 2.25 V ±0.04 V threshold at +25°C and 30 ppm/°C tempco, coupled to a fixed internal timer that holds RESET low for ≥140 ms after VCC rises above threshold. Its open-drain output requires an external pull-up and supports bidirectional reset interfaces.
It operates across -40°C to +85°C ambient, draws only 30 µA typical supply current, and maintains guaranteed RESET validity (logic low) for VCC ≥ 1 V. The device ignores fast VCC transients and features hysteresis of 40 mV to prevent chatter during threshold crossing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.25 V (typ), ±0.04 V tolerance at +25°C - sets precise brownout detection point for 2.5 V logic rails |
| Reset Timeout | 200 ms (typ), ≥140 ms min - ensures sufficient hold time for full µP initialization before release |
| Supply Current | 30 µA (typ) at VCC = 3.3 V - enables battery-powered operation without significant drain |
| Operating VCC Range | 1.1 V to 5.5 V - supports valid reset assertion even during deep brownout or low-voltage startup |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and level-shifting across supply domains |
| Reset Hysteresis | 40 mV - prevents oscillation during slow VCC recovery near threshold |
| Tempco | 30 ppm/°C - ensures stable threshold over industrial temperature range (-40°C to +85°C) |
Pinout & Package
APX803-23SRG-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SR) package with gull-wing leads and standard JEDEC MO-178 footprint. Thermal resistance is θJA = 201°C/W on FR-4 with 2 oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must be low-impedance connection to system ground plane |
| 2 (VCC) | Supply voltage input | Monitored power rail input; powers internal circuitry and defines reset threshold reference |
| 3 (RESET) | Open-drain reset output | Active-low signal asserted during power-up/brownout; requires external pull-up resistor to monitored or host supply |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.25 V threshold | ±0.04 V tolerance at +25°C with 30 ppm/°C drift - eliminates need for external trimming in 2.5 V system monitoring |
| 200 ms reset timeout | Guaranteed ≥140 ms minimum - satisfies boot-time requirements of ARM Cortex-M0/M3 and PIC16/18 microcontrollers |
| 30 µA supply current | Typical draw at 3.3 V - extends battery life in portable instrumentation and handheld controllers |
| Valid reset down to VCC = 1 V | Ensures deterministic state during deep undervoltage - prevents spurious release before full power recovery |
| Open-drain output | Supports multi-source reset arbitration and level translation - enables single RESET line for mixed-supply SoCs |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
|
Use Scenario: Power sequencing and brownout protection in DIN-rail mounted programmable logic controllers with dual 5 V/3.3 V rails. IC Role / Device Role / Timing Role: Supervises main 3.3 V logic supply and asserts synchronous reset to ARM-based control MCU during AC dropout events. Use Value: 200 ms timeout ensures complete firmware reload and peripheral reinitialization before process restart. |
Use Scenario: Battery-backed vital signs monitor with intermittent LCD backlight and Bluetooth LE radio. IC Role / Device Role / Timing Role: Monitors 2.5 V analog front-end supply and triggers controlled shutdown/reset when Li-ion drops below 3.0 V. Use Value: 2.25 V threshold aligns with LDO dropout voltage, preventing erratic ADC readings during battery sag. |
| Smart Energy Meter | Automotive Body Control Module |
|
Use Scenario: Revenue-grade electricity meter with isolated RS-485 interface and real-time clock backup. IC Role / Device Role / Timing Role: Resets metrology SoC on 3.3 V rail during power interruption; open-drain output shares reset bus with RTC supervisor. Use Value: Open-drain architecture enables wired-OR with secondary supervisor, eliminating single-point failure in tamper-resistant design. |
Use Scenario: 12 V automotive body controller with local 5 V/3.3 V regulation for door module MCU and CAN transceiver. IC Role / Device Role / Timing Role: Supervises 3.3 V domain powering LIN gateway MCU; tolerates load-dump transients via 6 V absolute max rating. Use Value: 2 kV HBM ESD rating and -40°C to +85°C operation ensure robustness in under-hood thermal cycling environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803-23SAG-7 | Same 2.25 V threshold and 200 ms timeout, but uses SA (not SR) SOT23 variant with identical pinout but different leadframe geometry | No functional difference; SA variant has marginally higher θJA (210°C/W vs. 201°C/W) due to pad layout | Select SA if legacy board design uses SA footprint; SR preferred for new layouts per Diodes' updated thermal recommendations |
| TPS3808G12DBVR | 2.5 V threshold, 200 ms timeout, push-pull output, 1.4 µA quiescent current - lower power but incompatible output drive type | Requires redesign of pull-up network; not drop-in due to active-high default and no open-drain capability | Choose only if ultra-low power (<2 µA) is critical and system supports push-pull reset signaling |
Compared with APX803-23SAG-7, the SR package offers improved thermal performance on standard PCBs; compared with TPS3808G12DBVR, APX803-23SRG-7 provides essential open-drain flexibility for multi-source reset buses but consumes more supply current.
Availability
APX803-23SRG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for APX803-23SRG-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, computing, and consumer markets.
The APX803 series belongs to Diodes' µP supervisor product line, designed specifically for cost-sensitive, space-constrained embedded systems requiring precision voltage monitoring and deterministic reset timing without external components.
FAQ
What is the exact reset threshold voltage for APX803-23SRG-7 at room temperature?
The APX803-23SRG-7 has a nominal reset threshold of 2.25 V at +25°C, with a guaranteed range of 2.21 V to 2.30 V per datasheet DS32131 Rev. 3. This value is factory-trimmed and specified across the full operating temperature range (-40°C to +85°C) with 30 ppm/°C tempco.
Does APX803-23SRG-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. Typical values are 10 kΩ to the monitored VCC rail or to a separate logic supply. No internal pull-up is present; omission results in undefined reset state during normal operation.
Can APX803-23SRG-7 operate reliably below 1.1 V supply voltage?
No - the recommended minimum VCC is 1.1 V. While the device guarantees RESET validity down to VCC = 1 V, operation below 1.1 V falls outside specified conditions. Below 1.1 V, internal comparator accuracy degrades and reset timeout timing is not characterized.
Is APX803-23SRG-7 pin-compatible with APX803D-29SRG-7?
Yes - both use identical SOT23-SR package and 1-GND / 2-VCC / 3-RESET pinout. However, APX803D-29SRG-7 has 2.93 V threshold and only 1 ms reset timeout, making it functionally incompatible for applications requiring 200 ms hold time or 2.25 V detection.
APX803-23SRG-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:
- Not For New Designs
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.25V
- 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
APX803-23SRG-7 FAQ
1.How can I place an order for APX803-23SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803-23SRG-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 APX803-23SRG-7 reliable?
The price and inventory of APX803-23SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803-23SRG-7 is usually 5 days.
3.What payment methods are accepted for APX803-23SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803-23SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803-23SRG-7?
APX803-23SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803-23SRG-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 APX803-23SRG-7?
For technical support, including APX803-23SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803-23SRG-7 requirements.
6.How does Aetrix verify that APX803-23SRG-7 is sourced from the original manufacturer or authorized distributors?
All APX803-23SRG-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 APX803-23SRG-7 meets industry standards.
7.What is the process for return or replacement of APX803-23SRG-7?
All APX803-23SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803-23SRG-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 APX803-23SRG-7 part is unused and in its original packaging.
Return procedure for APX803-23SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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