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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Diodes Incorporated PT7A7515WE

Name: PT7A7515WE
Brand: Diodes Incorporated
SKU: PT7A7515WE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT7A7515WE

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: PT7A7515WE.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PT7A7515WE from Diodes Incorporated is a precision μP supervisor IC with 2.63V reset threshold, active-low RESET output, 200ms reset pulse width, and integrated watchdog timer (1.6s timeout). It monitors V_CC during power-up/down/brownout in microprocessor systems and provides low-voltage detection via PFI/PFO for battery or power-fail warning in embedded control applications.

For engineers reviewing the PT7A7515WE datasheet, PT7A7515WE pinout, PT7A7515WE application, or PT7A7515WE equivalent, key selection criteria include guaranteed RESET validity down to V_CC = 1.2V, TTL/CMOS-compatible manual reset input, 1.25V power-fail comparator threshold, watchdog timer interaction with MR, and SOIC-8W package compatibility with industrial PCB layouts.

Technical Context

This device implements a precision voltage monitor with ±1.5% reset threshold tolerance at 2.63V nominal, coupled with a 200ms monostable reset generator triggered by V_CC crossing, MR assertion, or brownout. Its internal 1.25V reference feeds both the reset comparator and independent PFI comparator.

The watchdog circuit uses a 1.6s timeout period with edge-sensitive WDI input; it clears automatically on RESET assertion or high-impedance WDI state. WDO output reflects watchdog timeout or low-V_CC, while RESET remains asserted for full 200ms after recovery - ensuring reliable μP initialization across supply transients.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.63V ±1.5% - ensures reliable reset assertion before microprocessor V_CC drops below functional minimum.
Reset Pulse Width	200ms typ. - guarantees sufficient duration for full μP initialization and register clearing.
Watchdog Timeout	1.6s typ. - provides robust software hang detection without excessive false triggers.
PFI Threshold	1.25V ±20mV - enables accurate low-battery or power-fail detection independent of V_CC.
Supply Current	30µA typ. at 3.0V - supports ultra-low-power operation in battery-backed systems.
V_CC Operating Range	2.7V to 5.5V - compatible with 3.0V and 3.3V logic domains and legacy 5V designs.
RESET Validity	Down to V_CC = 1.2V - maintains deterministic reset behavior during deep brownout conditions.

Pinout & Package

PT7A7515WE is housed in an 8-pin SOIC (W) package - 150mil wide, RoHS-compliant, lead-free, and halogen-free per Diodes Incorporated "Green" definition.

Pin/Terminal	Circuit Role	Design Meaning
1 (MR)	Manual Reset Input	Active-low TTL/CMOS-compatible trigger; internal 250µA pull-up enables switch or logic drive without external resistor.
2 (V_CC)	Power Supply	Primary supply rail (2.7–5.5V); powers all internal comparators, timers, and outputs.
3 (GND)	Ground Reference	Common return path for all analog and digital functions; must be low-impedance for noise immunity.
4 (PFI)	Power-Fail Input	Monitors external voltage against 1.25V reference; asserts PFO low when input falls below threshold.
5 (WDO)	Watchdog Output	Open-drain active-low signal indicating watchdog timeout or V_CC < reset threshold; no minimum pulse width.
6 (RESET)	Reset Output	Active-low push-pull output; guaranteed low (≤0.4V) for 200ms after V_CC rise or MR release.
7 (WDI)	Watchdog Input	Edge-sensitive input; toggling within 1.6s prevents timeout; floating or high-Z disables watchdog.
8 (PFO)	Power-Fail Output	Open-drain active-low output tied to PFI comparator; sinks current when PFI < 1.25V.

Key Features

Feature	Design Value
Precision reset threshold	2.63V with ±1.5% tolerance - eliminates need for external resistor divider calibration in 3.0V systems.
Guaranteed reset at low V_CC	RESET valid down to 1.2V - ensures fail-safe behavior during deep undervoltage events.
Debounced manual reset	140ms minimum pulse width on MR - suppresses mechanical switch bounce without external RC network.
Dual-function comparator	Shared 1.25V reference for both reset and PFI - improves tracking accuracy between supply monitoring and power-fail detection.
Watchdog timer integration	1.6s timeout with automatic clear on RESET - prevents spurious NMI interrupts during system reset sequences.

Applications

Industrial PLC Controller

Automotive Body Control Module

Use Scenario: Microcontroller supervises I/O expansion, CAN communication, and relay drivers in harsh electrical environments with frequent load-dump transients.

IC Role / Device Role / Timing Role: Primary reset supervisor asserting active-low RESET during V_CC brownout and providing 1.25V-referenced PFO for battery voltage monitoring.

Use Value: 200ms reset pulse ensures full firmware reload after transient-induced resets; 2.63V threshold aligns with 3.0V MCU V_DD min spec.

Use Scenario: Low-power microcontroller manages door locks, lighting, and window controls with backup battery support.

IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 12V-to-3.3V supply via V_CC, and detects backup battery depletion via PFI connected to battery divider.

Use Value: Guaranteed RESET operation down to 1.2V enables safe shutdown sequencing before backup power loss; 30µA quiescent current extends battery life.

Medical Infusion Pump

Smart Energy Meter

Use Scenario: Safety-critical MCU controls motor actuation and flow sensing; requires deterministic reset under line fluctuations and battery switchover.

IC Role / Device Role / Timing Role: Fault-tolerant supervisor with MR input for emergency hardware reset and WDI-driven watchdog to detect firmware hangs.

Use Value: Watchdog timeout (1.6s) and reset pulse (200ms) are independently configurable and electrically isolated - meeting IEC 62304 Class C timing requirements.

Use Scenario: Metering SoC operates from AC-derived 3.3V rail and supercapacitor backup; must log last-read data before power loss.

IC Role / Device Role / Timing Role: Power-fail detector using PFI/PFO to trigger early interrupt before V_CC crosses 2.63V reset threshold.

Use Value: 1.25V PFI threshold allows precise setting of power-fail warning point (e.g., 2.4V on 3.3V rail via 2:1 divider), enabling >100ms data save window.

Equivalent & Alternatives

The following parts are listed as comparable options for similar μP supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6326UT26D3+	2.63V reset threshold, no watchdog, SOT23-3 package, 1.6µA I_CC	Lacks WDI/WDO and PFI/PFO; only basic reset function	Select when minimal footprint and ultra-low power outweigh need for watchdog or power-fail warning.
TPS3808G33DBVR	3.3V reset threshold, adjustable delay, no PFI comparator, 1.6µA I_CC	Higher reset threshold; no dedicated power-fail detection path	Choose for 3.3V systems requiring programmable reset delay but not dual-threshold monitoring.

Compared with MAX6326UT26D3+ and TPS3808G33DBVR, PT7A7515WE uniquely integrates 2.63V precision reset, 1.25V PFI comparator, and 1.6s watchdog in one SOIC-8 - enabling compact, feature-complete supervision without external components or compromise on voltage thresholds.

Availability

PT7A7515WE is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned manufacturing traceability.

Supply support for PT7A7515WE 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, automotive, and computing markets.

The PT7A75xx family targets microprocessor system reliability - delivering integrated reset, watchdog, and power-fail monitoring in single-chip solutions optimized for space-constrained, safety-aware embedded designs.

FAQ

Can PT7A7515WE be used with a 3.3V microcontroller?

Yes. PT7A7515WE operates from 2.7V to 5.5V and features a 2.63V reset threshold - specifically designed to assert RESET before a 3.3V MCU drops below its 2.7V minimum operating voltage. Its RESET output is push-pull active-low and compatible with standard 3.3V logic inputs without level shifting.

How does the manual reset (MR) interact with the watchdog timer?

Asserting MR clears the watchdog timer and forces WDO high. During MR assertion, the watchdog is disabled and will not time out. Once MR is released, the timer restarts only if WDI is driven - floating or high-Z WDI keeps the watchdog inactive. This ensures no spurious WDO pulses during hardware-initiated resets.

What is the purpose of the PFI and PFO pins beyond power-fail detection?

PFI and PFO form a configurable voltage monitor: PFI accepts any external voltage (e.g., battery divider output), and PFO asserts low when that voltage falls below 1.25V. This enables low-battery warnings, brownout alerts for auxiliary rails, or custom threshold detection - independent of V_CC and without loading the monitored source.

Is PT7A7515WE qualified for automotive applications?

PT7A7515WE is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q100, Diodes Incorporated offers automotive-grade variants (e.g., PT7A7515WEXQ) with full qualification - contact Aetrix or Diodes for PPAP-ready versions and change-controlled automotive part numbers.

PT7A7515WE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

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 Low

Reset Timeout:: 160ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

PT7A7515WE FAQ

1.How can I place an order for PT7A7515WE through Aetrix?

Please submit a Request for Quotation (RFQ) for PT7A7515WE 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 PT7A7515WE reliable?

The price and inventory of PT7A7515WE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7A7515WE is usually 5 days.

3.What payment methods are accepted for PT7A7515WE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7A7515WE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PT7A7515WE?

PT7A7515WE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PT7A7515WE 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 PT7A7515WE?

For technical support, including PT7A7515WE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7A7515WE requirements.

6.How does Aetrix verify that PT7A7515WE is sourced from the original manufacturer or authorized distributors?

All PT7A7515WE 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 PT7A7515WE meets industry standards.

7.What is the process for return or replacement of PT7A7515WE?

All PT7A7515WE units undergo pre-shipment inspection (PSI). If there is an issue with PT7A7515WE, 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 PT7A7515WE part is unused and in its original packaging.

Return procedure for PT7A7515WE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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