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Diodes Incorporated PT7A7613M8-13
- Part No.:
- PT7A7613M8-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PT7A7613M8-13.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,090
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Product details
Overview
PT7A7613M8-13 from Diodes Incorporated is a precision 3.08V active-low microprocessor (µP) supervisor IC in MSOP-8 package, designed for reliable power-up/power-down/brownout reset assertion, 1.25V power-fail detection, and 1.6s watchdog timeout monitoring in embedded systems with 3.3V supply rails. It guarantees RESET validity down to VCC = 1V and features debounced manual-reset input.
For engineers reviewing the PT7A7613M8-13 datasheet, PT7A7613M8-13 pinout, PT7A7613M8-13 application, or PT7A7613M8-13 equivalent, key selection considerations include its 3.08V reset threshold tolerance (±2%), 200ms reset pulse width, TTL/CMOS-compatible MR input, PFI/PFO low-battery signaling, and WDI/WDO watchdog interface - all validated for industrial temperature range (-40°C to +85°C).
Technical Context
This supervisor integrates a precision bandgap-based voltage monitor with 0.8% hysteresis, a 1.6s watchdog timer cleared on RESET assertion or WDI edge transitions, and independent power-fail comparator referenced to 1.25V. Its MR input includes internal 250µA pull-up and supports direct switch or logic-level triggering.
The device asserts active-low RESET during VCC ramp-up until 200ms after crossing 3.08V, holds RESET low during brownout (VCC < 3.018V), and maintains valid output down to VCC = 1V. WDO goes low on watchdog timeout or VCC undervoltage, while PFO sinks current when PFI falls below 1.25V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±2% - ensures deterministic reset release at 3.3V system rail with margin against noise and drift |
| Reset Pulse Width | 200ms typ - meets µP minimum reset hold-time requirements for reliable boot initialization |
| Watchdog Timeout | 1.6s typ - provides sufficient window to detect firmware lockup without false triggers during normal operation |
| Power-Fail Threshold | 1.25V ±25mV - enables accurate low-battery or backup-supply monitoring with external resistor divider |
| Supply Current | 10µA typ at 3.3V - minimizes quiescent load in battery-backed or energy-sensitive applications |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded control and portable equipment environments |
| VCC Validity Range | 1.0V to 5.5V - guarantees RESET functionality across wide input range including deep brownout recovery |
Pinout & Package
PT7A7613M8-13 uses an 8-pin MSOP package (3.0mm × 4.9mm, 0.65mm pitch) with exposed thermal pad per Diodes Inc. outline M8. Pin numbering follows standard MSOP top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Manual Reset Input | Active-low TTL/CMOS-compatible trigger with internal 250µA pull-up; initiates 200ms RESET pulse when pulled <0.6V |
| 2 (VCC) | Supply Voltage Input | Primary power rail connection (1.0–5.5V); powers all internal circuitry and defines reset threshold reference |
| 3 (GND) | Ground Reference | Common return path for all analog and digital functions; must be low-impedance for stable threshold accuracy |
| 4 (PFI) | Power-Fail Input | Analog input for external voltage divider; asserts PFO low when voltage drops below 1.25V |
| 5 (PFO) | Power-Fail Output | Open-drain output sinking current when PFI < 1.25V; used for battery-low interrupt or system shutdown signaling |
| 6 (WDI) | Watchdog Input | Edge-sensitive input; clears internal 1.6s timer on rising/falling transition; floating disables watchdog |
| 7 (RESET) | Reset Output | Active-low open-drain output; held low for ≥140ms during power-up, brownout, or MR assertion |
| 8 (WDO) | Watchdog Output | Open-drain output pulled low on watchdog timeout or VCC undervoltage; no minimum pulse width guarantee |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 3.08V ±2% - eliminates need for external trimming in 3.3V systems requiring tight supply-margin monitoring |
| Guaranteed RESET at VCC = 1V | Ensures fail-safe reset assertion even during severe brownout, preventing undefined µP state |
| Debounced MR input | 140ms minimum reset pulse width inherently filters mechanical switch bounce without external RC |
| Independent PFI/PFO comparator | 1.25V reference enables flexible low-battery or auxiliary supply monitoring via external resistor network |
| Watchdog with edge-triggered clear | WDI accepts >50ns pulses; timer resets on any transition - robust against noise and compatible with GPIO toggling |
Applications
| Industrial PLC Controller | Medical Portable Monitor |
|---|---|
|
Use Scenario: Real-time data acquisition and control logic execution in programmable logic controllers operating from 3.3V SMPS with backup coin cell. IC Role / Device Role / Timing Role: µP supervisor ensuring deterministic reset during mains dropout, brownout, or cold start; monitors main rail and battery health. Use Value: Prevents corrupted I/O states and firmware crashes by enforcing 200ms reset hold and detecting 1.25V battery depletion before critical failure. |
Use Scenario: Battery-powered vital-signs monitor with sleep/wake cycles and non-volatile memory retention. IC Role / Device Role / Timing Role: Supervisor providing brownout reset, low-battery warning (PFO), and watchdog supervision of ARM Cortex-M firmware. Use Value: Extends operational life by enabling graceful shutdown on battery depletion and recovering from software hangs via WDI-triggered watchdog reset. |
| Smart Energy Meter | IoT Edge Sensor Node |
|
Use Scenario: Revenue-grade electricity meter with metrology ASIC, RTC, and secure bootloader running from 3.3V isolated supply. IC Role / Device Role / Timing Role: Power integrity guardian asserting RESET during AC line sags and validating supply stability before secure boot. Use Value: Meets IEC 62053-21 reset timing requirements and prevents invalid energy measurements caused by marginal VCC conditions. |
Use Scenario: LoRaWAN sensor node powered by primary lithium battery with periodic wake-up and BLE configuration interface. IC Role / Device Role / Timing Role: Low-quiescent supervisor enabling ultra-low-power sleep mode while maintaining watchdog supervision and battery voltage alerting. Use Value: Achieves <15µA system sleep current with guaranteed 3.08V reset threshold accuracy and 1.25V PFI detection for end-of-life battery signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT31D3+ | 3.08V reset threshold, SOT23-5, no PFI/PFO, no watchdog | Lacks power-fail detection and watchdog; suitable only for basic reset-only use cases | Select when footprint constraint outweighs need for PFI/PFO and watchdog functionality |
| TPS3808G33DBVR | 3.3V reset threshold, SOT23-6, adjustable delay, no PFI/PFO, no watchdog | Higher threshold (3.3V vs 3.08V) reduces noise immunity margin; lacks integrated power-fail comparator | Prefer for designs requiring programmable reset delay but accepting reduced brownout sensitivity |
Compared with MAX6326UT31D3+ and TPS3808G33DBVR, PT7A7613M8-13 uniquely combines 3.08V precision reset, integrated 1.25V power-fail comparator, and 1.6s watchdog in a single MSOP-8 package - delivering full supervisory functionality without external components or threshold compromises.
Availability
PT7A7613M8-13 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical portable monitors, smart energy meters, and IoT edge sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PT7A7613M8-13 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 PT7A76xx family targets µP system reliability enhancement through integrated voltage monitoring, reset generation, power-fail detection, and watchdog supervision - optimized for cost-sensitive, space-constrained embedded applications.
FAQ
What is the minimum VCC required for PT7A7613M8-13 to assert a valid RESET signal?
The device guarantees RESET output validity down to VCC = 1.0V, with VOL ≤ 0.3V at ISINK = 100µA. Below 1.0V, RESET behavior is not specified, and internal circuitry may become unstable. This ensures fail-safe reset assertion during deep brownout events common in battery-backed systems.
Can the watchdog timer be disabled without removing the WDI connection?
Yes - leaving WDI unconnected (high-impedance) disables the watchdog timer, causing WDO to function solely as a low-line indicator that goes low only when VCC falls below the 3.08V reset threshold. No external pull-up/down is required, as the input is internally high-impedance when unused.
How does the PFI/PFO circuit operate when not used in the application?
When unused, PFI must be tied either to GND or VCC to prevent floating input; both configurations disable PFO assertion. Connecting PFI to GND forces PFO low continuously, while connecting to VCC keeps PFO high. Neither condition affects RESET or watchdog functionality.
Is PT7A7613M8-13 compatible with 1.8V microcontrollers?
No - although RESET is valid down to VCC = 1.0V, the device requires VCC ≥ 3.0V for guaranteed operation per recommended conditions (3.0–5.5V for PT7A76x3 variants). Driving MR or interpreting RESET with a 1.8V µP requires level-shifting due to VIH/VIL thresholds referenced to VCC.
PT7A7613M8-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
PT7A7613M8-13 FAQ
1.How can I place an order for PT7A7613M8-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7A7613M8-13 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 PT7A7613M8-13 reliable?
The price and inventory of PT7A7613M8-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7A7613M8-13 is usually 5 days.
3.What payment methods are accepted for PT7A7613M8-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7A7613M8-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7A7613M8-13?
PT7A7613M8-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7A7613M8-13 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 PT7A7613M8-13?
For technical support, including PT7A7613M8-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7A7613M8-13 requirements.
6.How does Aetrix verify that PT7A7613M8-13 is sourced from the original manufacturer or authorized distributors?
All PT7A7613M8-13 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 PT7A7613M8-13 meets industry standards.
7.What is the process for return or replacement of PT7A7613M8-13?
All PT7A7613M8-13 units undergo pre-shipment inspection (PSI). If there is an issue with PT7A7613M8-13, 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 PT7A7613M8-13 part is unused and in its original packaging.
Return procedure for PT7A7613M8-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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