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Diodes Incorporated APX803S00-46SA-7
- Part No.:
- APX803S00-46SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S00-46SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,850
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Product details
Overview
APX803S00-46SA-7 from Diodes Incorporated is a 3-pin SOT23 open-drain microprocessor reset supervisor IC designed for precise 4.63V supply monitoring in embedded systems. It asserts an active-low RESET signal during power-up, brownout, or voltage sag below its factory-trimmed threshold (4.56–4.70V), holds reset for ≥1ms after VCC recovers, and guarantees valid output down to VCC = 1V. Used in portable controllers and battery-powered instrumentation requiring low-current supervision.
For engineers reviewing the APX803S00-46SA-7 datasheet, APX803S00-46SA-7 pinout, APX803S00-46SA-7 application, or APX803S00-46SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.07V), 1.7ms typical timeout, 10µA supply current, open-drain drive capability (1.2mA sink @ 0.3V), and guaranteed operation across –40°C to +85°C.
Technical Context
The APX803S00-46SA-7 implements a precision bandgap-based voltage comparator with internal hysteresis to reject fast VCC transients, coupled to a monostable timer that initiates on VCC crossing above the 4.63V threshold. Its open-drain output requires an external pull-up resistor and supports bidirectional reset interfaces with µCs like the Motorola 68HC11.
It operates over VCC = 1.0V to 5.5V, delivers guaranteed logic-low RESET down to VCC = 1V, and exhibits ≤30 ppm/°C temperature coefficient on the reset threshold. The device draws only 10µA typical supply current at 25°C and remains functional across full industrial temperature range without external calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (min 4.56V, max 4.70V) - precisely monitors 5V rail with ±1.5% tolerance at 25°C |
| Reset Timeout | 1.7ms typical (1–3.3ms min–max) - ensures sufficient hold time for µP initialization after power recovery |
| Supply Current | 10µA typical - enables multi-year battery life in portable equipment |
| Output Type | Open-drain active-low - allows wired-OR reset bus and level-shifting across supply domains |
| VCC Operating Range | 1.0V to 5.5V - guarantees reset validity even during deep brownout conditions |
| Reset Valid Down To | VCC = 1V - maintains defined logic state while core circuitry remains inactive |
| Tempco | ≤30 ppm/°C - ensures <±20mV drift over –40°C to +85°C, critical for stable system boot |
Pinout & Package
APX803S00-46SA-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SA package) with 2.9mm × 1.3mm footprint and 0.95mm height. Thermal resistance θJA = 232°C/W enables operation in compact, unventilated enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and timer; must be low-impedance connection to system ground plane |
| 2 (VCC) | Supply input | Monitored power rail input; powers internal circuitry and defines reset detection threshold |
| 3 (RESET) | Open-drain output | Active-low reset signal; requires external pull-up resistor (typically 10–100kΩ) to target logic rail |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | Factory-trimmed ±0.07V tolerance ensures accurate 5V rail supervision without external resistors |
| 1.7ms reset timeout | Guaranteed minimum 1ms hold time prevents premature µP release during marginal power recovery |
| 10µA supply current | Enables integration into always-on subsystems without compromising battery runtime |
| Valid reset down to VCC = 1V | Eliminates undefined reset states during deep undervoltage, improving boot reliability |
| Open-drain output stage | Supports shared reset buses, mixed-voltage systems, and bidirectional µP reset pins |
Applications
| Industrial Controllers | Portable Data Loggers |
|---|---|
|
Use Scenario: PLC I/O modules powered from 5V DC-DC converters subject to load-induced sags. IC Role / Device Role / Timing Role: Monitors 5V rail and asserts RESET if voltage drops below 4.63V, holding for ≥1ms after recovery to prevent firmware corruption. Use Value: Prevents spurious reboots during transient load steps, ensuring deterministic control loop execution. |
Use Scenario: Battery-powered environmental sensor nodes operating on Li-ion cells with aging-related voltage droop. IC Role / Device Role / Timing Role: Supervises regulated 5V supply derived from buck converter; triggers controlled shutdown before brownout resets MCU mid-measurement. Use Value: Extends usable battery life by enabling graceful data save before power loss, avoiding flash corruption. |
| Medical Diagnostic Handhelds | Smart Energy Meters |
|
Use Scenario: Handheld ultrasound units with dual 3.3V/5V rails where 5V supplies analog front-end and display drivers. IC Role / Device Role / Timing Role: Dedicated 5V rail supervisor with open-drain output pulled up to 3.3V logic domain for µC reset interface. Use Value: Enables safe power sequencing across voltage domains and eliminates risk of analog circuit latch-up during power transitions. |
Use Scenario: DIN-rail mounted meters with isolated 5V auxiliary supply powering metrology ASIC and communication interface. IC Role / Device Role / Timing Role: Provides fail-safe reset assertion during AC line dips or transformer saturation events affecting 5V rail stability. Use Value: Maintains meter timekeeping integrity and prevents erroneous kWh accumulation during brief supply disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S-46SA-7 | Push-pull (not open-drain) RESET output; same 4.63V threshold and 1.7ms timeout | Requires no external pull-up; incompatible with wired-OR reset buses or level-shifting | Select when driving single-load µP reset pin directly and board space prohibits pull-up resistor |
| MAX809SEUR+T | 4.63V threshold, push-pull output, 240ms timeout (not 1.7ms); 1.6µA supply current | Longer reset hold time suits slower µPs; lower current benefits ultra-low-power designs | Select when extended reset duration is required and open-drain functionality is unnecessary |
Compared with APX809S-46SA-7 and MAX809SEUR+T, the APX803S00-46SA-7 uniquely combines 1.7ms timeout, open-drain flexibility, and 10µA consumption-making it optimal for space-constrained, multi-rail, or battery-critical systems needing fast, configurable reset assertion.
Availability
APX803S00-46SA-7 is available at Aetrix Electronics and suitable for industrial controllers, portable data loggers, and smart energy meters requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for APX803S00-46SA-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, cost-optimized components for industrial, computing, and consumer markets.
The APX803S series belongs to Diodes' supervisory IC product line, engineered specifically for robust, low-power microprocessor reset functions in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for APX803S00-46SA-7?
The APX803S00-46SA-7 has a factory-trimmed reset threshold of 4.63V, with guaranteed limits of 4.56V (minimum) and 4.70V (maximum) at +25°C. This specification is validated per DS39161 Rev. 2–2, Table 1, and remains stable across temperature with ≤30 ppm/°C drift.
Does APX803S00-46SA-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain active-low and requires an external pull-up resistor to a logic rail (e.g., 3.3V or 5V). Typical values range from 10kΩ to 100kΩ, selected based on rise-time requirements and bus loading. No internal pull-up exists.
Can APX803S00-46SA-7 supervise a 3.3V supply?
No - the APX803S00-46SA-7 is configured for 4.63V threshold and is intended for 5V rail supervision. For 3.3V systems, Diodes offers APX803S00-31SA-7 (3.08V threshold) or APX803S00-29SA-7 (2.93V threshold), both with identical timing and package.
What is the maximum sink current capability of the RESET output?
The RESET output can sink up to 1.2mA while maintaining VOL ≤ 0.3V at VCC = VTH − 0.2V, and up to 3.5mA with VOL ≤ 0.4V under same conditions. Absolute maximum rating is 20mA, but sustained operation above 5mA is not recommended per datasheet derating guidelines.
APX803S00-46SA-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803S00-46SA-7 FAQ
1.How can I place an order for APX803S00-46SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S00-46SA-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 APX803S00-46SA-7 reliable?
The price and inventory of APX803S00-46SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803S00-46SA-7 is usually 5 days.
3.What payment methods are accepted for APX803S00-46SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S00-46SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S00-46SA-7?
APX803S00-46SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S00-46SA-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 APX803S00-46SA-7?
For technical support, including APX803S00-46SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S00-46SA-7 requirements.
6.How does Aetrix verify that APX803S00-46SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803S00-46SA-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 APX803S00-46SA-7 meets industry standards.
7.What is the process for return or replacement of APX803S00-46SA-7?
All APX803S00-46SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S00-46SA-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 APX803S00-46SA-7 part is unused and in its original packaging.
Return procedure for APX803S00-46SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803S00-46SA-7 Tags
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