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STMicroelectronics STM6719TZWB6F
- Part No.:
- STM6719TZWB6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
STM6719TZWB6F.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,352
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Product details
Overview
STM6719TZWB6F from STMicroelectronics is a triple ultra-low-voltage supervisor IC with primary (VCC1), secondary (VCC2), and externally adjustable (RSTIN) supply monitoring, active-low open-drain RST output, manual reset (MR) input, and SOT23-6 package. It features factory-programmed VCC1 reset thresholds from 4.63 V to 1.58 V, VCC2 thresholds from 3.08 V to 0.79 V, 0.626 V internal reference for RSTIN, 13.2/210/900 ms typ power-up reset delay (trec), and 11 µA typical supply current at 3.6 V. It is used in battery-powered networking equipment requiring reliable multi-rail power sequencing and push-button recovery.
For engineers reviewing the STM6719TZWB6F datasheet, STM6719TZWB6F pinout, STM6719TZWB6F application, or STM6719TZWB6F equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in ST's official Doc ID 11469 Rev 8 specification and package mechanical data.
Technical Context
The device implements three independent voltage monitoring paths: VCC1 and VCC2 use factory-trimmed comparators with fixed thresholds, while RSTIN uses a high-impedance input referenced to a stable 0.626 V internal bandgap. All three comparators feed into a logic-controlled reset generator that asserts RST low when any monitored rail falls below its threshold or MR is pulled low.
RST remains asserted for a guaranteed minimum trec (13.2/210/900 ms typ) after all supplies recover and MR returns high. The open-drain RST output requires an external pull-up to VCC1 (e.g., 10 kΩ), and the IC guarantees correct RST state down to VCC1 or VCC2 ≥ 0.8 V - enabling robust operation during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | Factory-programmed 4.63 V to 1.58 V; sets primary supply fail point for microprocessor core or I/O rail monitoring. |
| VCC2 Threshold | Factory-programmed 3.08 V to 0.79 V; enables independent monitoring of auxiliary rails like memory or analog subsystems. |
| RSTIN Reference | 0.626 V internal reference; allows precise adjustment of third-rail reset threshold via external resistor divider. |
| Reset Delay (trec) | 13.2 / 210 / 900 ms (typ); ensures sufficient hold time for processor initialization and clock stabilization post-power-up. |
| Supply Current | 11 µA (typ) at VCC1 = VCC2 = 3.6 V; minimizes quiescent load in always-on battery-backed systems. |
| Operating Temp | –40 °C to +85 °C; supports industrial-grade deployment in embedded networking and portable equipment. |
| RST Output Type | Active-low open drain; compatible with bi-directional processor reset pins and flexible pull-up voltage selection. |
Pinout & Package
SOT23-6 (WB) package: 6-pin surface-mount, 1.3 mm × 2.9 mm footprint, 1.45 mm height, gull-wing leads, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Drives low when VCC1/VCC2/RSTIN fault or MR asserted; requires external pull-up to VCC1 for proper logic level. |
| 2 - VCC1 | Primary supply voltage input | Power source and reference for RST output, internal logic, and VCC1 monitor; must be ≥ 0.8 V for guaranteed RST validity. |
| 3 - VCC2 | Secondary supply voltage input | Enables dual-rail monitoring; supports independent threshold selection (3.08 V to 0.79 V) for auxiliary system supplies. |
| 4 - MR | Push-button manual reset input | Active-low input with 50 kΩ internal pull-up; debounced by design; connects to ground via momentary switch for system recovery. |
| 5 - VSS | Ground reference | Common return path for all internal circuits and external capacitor (if used on RSTIN or MR). |
| 6 - RSTIN | Adjustable reset comparator input | High-impedance node referenced to 0.626 V internal reference; sets third-rail threshold via external resistor divider network. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous VCC1, VCC2, and RSTIN supervision enables full-system power integrity coverage in compact SoC-based designs. |
| Factory-programmed thresholds | Eliminates external resistor networks for VCC1/VCC2, reducing BOM count and improving temperature stability vs. discrete solutions. |
| 0.626 V precision internal reference | Enables accurate sub-1 V rail monitoring (e.g., 1.0 V core, 0.9 V GPU) without external voltage references or trimming. |
| 11 µA typical supply current | Extends battery life in always-on applications such as remote sensors and IoT edge nodes where standby current is critical. |
| Guaranteed RST state ≥ 0.8 V | Ensures deterministic reset behavior during power ramp-up and brown-out, preventing spurious processor release. |
Applications
| Networking Equipment Power Sequencing | Battery-Powered Set-Top Box Recovery |
|---|---|
|
Use Scenario: Dual-rail DC/DC converter outputs (5 V and 3.3 V) powering Ethernet PHY and ARM-based media processor. IC Role / Device Role / Timing Role: Monitors both rails and asserts RST until both stabilize above thresholds; prevents boot failure due to asymmetric power-up timing. Use Value: Eliminates need for discrete RC timers and dual comparators, reducing board area by >40% and improving reset accuracy over temperature (±0.4% typical threshold drift). |
Use Scenario: Portable STB with Li-ion battery, 3.3 V main rail, and 1.2 V SoC core rail. IC Role / Device Role / Timing Role: Uses RSTIN to monitor 1.2 V core via resistor divider; triggers reset if core voltage sags during high-CPU-load discharge cycles. Use Value: Enables safe low-voltage shutdown before brown-out-induced corruption, with 0.626 V reference ensuring ±15 mV absolute accuracy at 1.2 V threshold. |
| Industrial Gateway Microcontroller Supervision | Wireless Access Point Multi-Rail Validation |
|
Use Scenario: Gateway using Cortex-M7 MCU with separate 3.3 V I/O, 1.8 V DDR, and 1.1 V core supplies. IC Role / Device Role / Timing Role: VCC1 monitors 3.3 V I/O rail; VCC2 monitors 1.8 V DDR; RSTIN monitors 1.1 V core via divider - all feeding single RST line. Use Value: Reduces supervisor count from three discrete ICs to one, cutting cost by 35% and simplifying layout while maintaining independent threshold control. |
Use Scenario: Dual-band Wi-Fi 6 AP with RF front-end (5 V), baseband (3.3 V), and CPU core (0.85 V). IC Role / Device Role / Timing Role: VCC1 = 5 V RF supply; VCC2 = 3.3 V baseband; RSTIN configured for 0.85 V core - all asserting common RST to prevent partial initialization. Use Value: Guarantees coordinated reset across heterogeneous power domains, avoiding RF lockup or MAC-layer hangs caused by out-of-sequence rail enable. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G18DBVR | Single-supply monitor (VDD only); no VCC2 or RSTIN inputs; fixed 1.8 V threshold; push-pull RST output. | Lacks dual/adjustable rail support; suitable only for single-rail systems needing basic reset assertion. | Select only if monitoring one rail and requiring push-pull output without manual reset delay capability. |
| MAX6816EUT+T | Single-channel push-button debouncer with no voltage monitoring; provides clean MR signal only. | No supply supervision function; cannot replace STM6719's core voltage-monitoring capability. | Use only as companion device for MR signal conditioning - not as functional replacement. |
Compared with TPS3808G18DBVR and MAX6816EUT+T, STM6719TZWB6F uniquely integrates triple-rail monitoring, factory-programmable thresholds, and open-drain RST in one SOT23-6 package - making it irreplaceable for compact multi-supply systems requiring coordinated reset and push-button recovery.
Availability
STM6719TZWB6F is available at Aetrix Electronics and suitable for networking equipment, battery-powered set-top boxes, industrial gateways, and wireless access points requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for STM6719TZWB6F 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and analog devices for industrial, automotive, and consumer markets.
STM67xx is ST's ultra-low-power supervisor product line targeting space-constrained, battery-sensitive applications such as portable networking gear and embedded edge devices - emphasizing minimal quiescent current, guaranteed reset behavior at low VCC, and flexible multi-rail monitoring.
FAQ
What is the function of the RSTIN pin on STM6719TZWB6F?
RSTIN is a high-impedance input referenced to an internal 0.626 V bandgap voltage. When the voltage at RSTIN falls below this reference - set by an external resistor divider across the monitored rail - the RST output is driven low. This enables precise supervision of sub-1 V supplies like modern SoC cores without external references or trimming components.
Does STM6719TZWB6F support delayed manual reset (MRC)?
No. STM6719TZWB6F does not include an MRC pin. That feature is exclusive to the STM6777/78/79/80 variants. STM6719TZWB6F provides only the standard MR input with immediate assertion of RST upon button press, followed by the selected trec delay after MR release.
What pull-up resistor value is recommended for the open-drain RST output?
A 10 kΩ pull-up resistor to VCC1 is specified in the datasheet as sufficient for most applications. This value ensures fast rise time while limiting current draw during RST assertion. For systems with long PCB traces or high capacitive loading, values between 4.7 kΩ and 22 kΩ may be evaluated empirically.
Can STM6719TZWB6F monitor a 1.0 V supply using RSTIN?
Yes. With the 0.626 V internal reference, a 1.0 V rail can be monitored by configuring an R1/R2 resistor divider such that VRSTIN = 0.626 V when VIN = 1.0 V - e.g., R1 = 600 Ω, R2 = 1000 Ω. The datasheet confirms RSTIN functionality across STM6719/20/79/80 and specifies ±15 mV reference accuracy over temperature.
STM6719TZWB6F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.313V, 3.075V, Adj
- 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:
- SOT-23-6
STM6719TZWB6F FAQ
1.How can I place an order for STM6719TZWB6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM6719TZWB6F 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 STM6719TZWB6F reliable?
The price and inventory of STM6719TZWB6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM6719TZWB6F is usually 5 days.
3.What payment methods are accepted for STM6719TZWB6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM6719TZWB6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM6719TZWB6F?
STM6719TZWB6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM6719TZWB6F 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 STM6719TZWB6F?
For technical support, including STM6719TZWB6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM6719TZWB6F requirements.
6.How does Aetrix verify that STM6719TZWB6F is sourced from the original manufacturer or authorized distributors?
All STM6719TZWB6F 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 STM6719TZWB6F meets industry standards.
7.What is the process for return or replacement of STM6719TZWB6F?
All STM6719TZWB6F units undergo pre-shipment inspection (PSI). If there is an issue with STM6719TZWB6F, 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 STM6719TZWB6F part is unused and in its original packaging.
Return procedure for STM6719TZWB6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM6719TZWB6F Tags
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MIC826SYMT-TR
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