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Diodes Incorporated APX812-26UG-7
- Part No.:
- APX812-26UG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
APX812-26UG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:2,722
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Product details
Overview
APX812-26UG-7 from Diodes Incorporated is a 4-pin microprocessor supervisor IC with manual reset input and active-high push-pull RESET output, designed for precise 2.63 V supply monitoring in industrial systems. It features a fixed 200 ms power-on reset timeout, operates across –40°C to +85°C, consumes only 40 µA typical supply current, and is housed in a RoHS-compliant SOT143 package. It is used in embedded controllers to prevent erroneous microprocessor startup during brownout or power-up transients.
For engineers reviewing the APX812-26UG-7 datasheet, APX812-26UG-7 pinout, APX812-26UG-7 application, or APX812-26UG-7 equivalent, key selection criteria include reset threshold accuracy (±0.04 V), MR input timing compatibility, push-pull drive capability (800 µA high-level source), and guaranteed RESET validity down to VCC = 1.0 V.
Technical Context
The APX812-26UG-7 implements a precision bandgap-based voltage reference comparator with hysteresis-free threshold detection at 2.63 V ±0.04 V, coupled to a monolithic RC timer generating a fixed 200 ms (min 140 ms, max 280 ms) reset assertion period after VCC recovery. Its manual reset input (MR) is active-low and asynchronous, with sub-100 ns pulse width immunity.
It uses a push-pull output stage that actively drives RESET high (VOH ≥ 0.8×VCC at 150 µA) and low (VOL ≤ 0.4 V at 3.2 mA), eliminating external pull-up resistors in most applications. The device remains functional over full industrial temperature range and maintains reset assertion for ≥240 ms after VCC rises above threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±0.04 V - ensures reliable reset assertion before 2.5 V logic rails fall out of spec |
| Reset Timeout | 200 ms (typical), 140–280 ms (min/max) - guarantees sufficient processor initialization time |
| Supply Current | 40 µA (typical at 25°C) - enables long battery life in portable equipment |
| Operating Temp | –40°C to +85°C - supports deployment in uncontrolled industrial environments |
| Output Type | Push-pull, active-high RESET - eliminates need for external pull-up and reduces BOM count |
| VCC Range | 1.1 V to 5.5 V - allows use with 1.8 V, 2.5 V, 3.3 V, and 5 V systems |
| MR Input Logic | Active-low, TTL/CMOS compatible - interfaces directly with pushbutton or FPGA GPIO |
Pinout & Package
APX812-26UG-7 is packaged in a lead-free, green-compliant SOT143 (4-pin, 1.4 mm × 2.5 mm) surface-mount package with exposed pad thermal performance (θJA = 240°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Top View) | MR (Manual Reset) | Asynchronous active-low input; forces RESET high regardless of VCC level when asserted |
| 2 | VCC | Power supply input; powers internal reference, timer, and output driver |
| 3 | GND | Ground reference for all internal circuitry and output stage |
| 4 | RESET | Active-high push-pull output; drives high to VCC (≥0.8×VCC) or low to ≤0.4 V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63 V threshold | ±0.04 V tolerance ensures deterministic reset at 3.3 V system brownout (≤79% nominal) |
| Fixed 200 ms timeout | Guaranteed minimum 140 ms hold time prevents premature MCU release during slow-rising supplies |
| Push-pull active-high output | Eliminates external pull-up resistor and avoids floating state during VCC ramp-up/down |
| MR input with noise immunity | Supports >100 ns minimum pulse width; rejects EMI-induced glitches on manual reset line |
| Low 40 µA quiescent current | Enables integration into always-on subsystems without compromising battery runtime |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
Use Scenario: Power sequencing in modular I/O modules where 3.3 V logic rails must stabilize before firmware execution. IC Role / Device Role / Timing Role: Monitors 3.3 V supply and asserts active-high RESET until voltage exceeds 2.63 V and holds for 200 ms. Use Value: Prevents watchdog timeout and firmware crash during cold-start or field-replaceable module insertion. |
Use Scenario: Battery-powered ultrasound probe with dual-voltage (1.8 V core, 3.3 V analog) regulation. IC Role / Device Role / Timing Role: Supervises 3.3 V analog supply and provides manual reset via tactile switch for field recalibration. Use Value: Ensures analog front-end resets cleanly before ADC sampling begins, avoiding baseline drift. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: 12 V-to-3.3 V DC-DC output supervision in junction box electronics subject to load-dump transients. IC Role / Device Role / Timing Role: Detects brownout on regulated 3.3 V rail and asserts RESET to halt CAN communication during voltage sag. Use Value: Maintains CAN node integrity by preventing partial register writes during unstable power conditions. |
Use Scenario: Tamper-resistant meter with backup supercapacitor and real-time clock requiring clean power-up sequence. IC Role / Device Role / Timing Role: Monitors main 3.3 V supply and triggers hardware reset if voltage drops below 2.63 V during capacitor discharge. Use Value: Guarantees RTC and metrology engine initialize synchronously, preserving time-stamped energy logs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3T | 2.63 V threshold, active-low open-drain RESET, 140 ms timeout, SOT23-3 | Requires external pull-up; incompatible with active-high MCU reset inputs | Select only if legacy board uses open-drain topology and can accommodate inverted reset logic |
| TPS3808G12DBVR | 2.63 V threshold, active-high push-pull RESET, 200 ms timeout, SOT23-6 | Larger footprint, higher quiescent current (1.3 µA vs. 40 µA), supports adjustable delay | Prefer for designs needing programmable timeout or tighter temp drift (<±0.5% over –40°C to +125°C) |
Compared with MAX809TRD3T and TPS3808G12DBVR, APX812-26UG-7 offers identical threshold and timeout while delivering lowest quiescent current in SOT143 footprint-critical for space-constrained, battery-sensitive applications where active-high reset is required.
Availability
APX812-26UG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for APX812-26UG-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 automotive markets.
The APX812-26UG-7 belongs to Diodes' microprocessor supervisor product line, engineered specifically for deterministic power-on reset generation and brownout protection in resource-constrained embedded systems operating across harsh environmental conditions.
FAQ
What is the minimum VCC required for APX812-26UG-7 to assert a valid RESET output?
The APX812-26UG-7 guarantees RESET output validity (VOH ≥ 0.8×VCC) for VCC > 1.0 V. Below 1.0 V, the output enters high-impedance state; a 100 kΩ pull-up to VCC is recommended to maintain defined logic high during deep brownout.
Does APX812-26UG-7 require an external capacitor for reset timing?
No. The 200 ms reset timeout is generated by an internal monolithic RC timer-no external capacitor or resistor is needed. This simplifies layout, improves reliability, and eliminates timing drift due to component tolerances or temperature effects.
How does the manual reset (MR) input interact with power-on reset behavior?
The MR input is fully asynchronous and overrides all voltage-monitoring functions: asserting MR low forces RESET high immediately, independent of VCC level or threshold crossing. Release of MR initiates the 200 ms timeout, even if VCC is already above 2.63 V.
Can APX812-26UG-7 be used in automotive applications per AEC-Q100?
No. While it operates across –40°C to +85°C, APX812-26UG-7 is not AEC-Q100 qualified. For automotive-grade equivalents, consider Diodes' AEC-Q100 qualified APX809 series or TI's TLV809 family with Grade 1 or Grade 2 qualification.
APX812-26UG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143
APX812-26UG-7 FAQ
1.How can I place an order for APX812-26UG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX812-26UG-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 APX812-26UG-7 reliable?
The price and inventory of APX812-26UG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX812-26UG-7 is usually 5 days.
3.What payment methods are accepted for APX812-26UG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX812-26UG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX812-26UG-7?
APX812-26UG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX812-26UG-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 APX812-26UG-7?
For technical support, including APX812-26UG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX812-26UG-7 requirements.
6.How does Aetrix verify that APX812-26UG-7 is sourced from the original manufacturer or authorized distributors?
All APX812-26UG-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 APX812-26UG-7 meets industry standards.
7.What is the process for return or replacement of APX812-26UG-7?
All APX812-26UG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX812-26UG-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 APX812-26UG-7 part is unused and in its original packaging.
Return procedure for APX812-26UG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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