STMicroelectronics STM6719SVWB6F

Overview

STM6719SVWB6F from STMicroelectronics is a dual ultra-low voltage supervisor IC with push-button reset and adjustable tertiary supply monitoring via RSTIN pin. It monitors VCC1 (factory-trimmed threshold: 1.58–4.63 V), VCC2 (0.79–3.08 V), and an externally adjustable rail via 0.626 V internal reference. Features open-drain active-low RST output, manual reset (MR), and operates from –40 °C to +85 °C in SOT23-6 package - used in battery-powered networking and portable embedded systems.

For engineers reviewing the STM6719SVWB6F datasheet, STM6719SVWB6F pinout, STM6719SVWB6F application, or STM6719SVWB6F equivalent, key selection criteria include dual-supply monitoring tolerance, RSTIN-based third-rail adaptability, guaranteed RST state down to 0.8 V supply, and compatibility with noisy reset button interfaces requiring no external debounce.

Technical Context

The device implements three independent voltage comparators: one for VCC1 (primary), one for VCC2 (secondary), and one for RSTIN referenced to a precision 0.626 V internal bandgap. Reset assertion occurs if any monitored voltage falls below its threshold or MR is pulled low.

Reset deassertion requires all monitored supplies to exceed their thresholds *and* MR to return high, followed by a fixed delay (trec = 13.2 ms / 210 ms / 900 ms typ). The open-drain RST output requires an external pull-up to VCC1 and remains valid when VCC1 ≥ 0.8 V.

Key Specifications

Pinout & Package

SOT23-6 (WB) package: 6-pin surface-mount, 1.3 mm × 2.9 mm footprint, 1.45 mm height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply supervisor applications.

Compared with TPS3808G18DBVR and MAX6816EUT+T, STM6719SVWB6F uniquely integrates dual fixed-threshold monitoring, adjustable third-rail sensing, and guaranteed low-VCC reset validity - enabling compact, robust power sequencing in multi-rail embedded systems without supplemental ICs.

Availability

STM6719SVWB6F is available at Aetrix Electronics and suitable for set-top box power sequencing, portable medical monitors, industrial Ethernet gateways, and smart home hub controllers requiring stable component supply across extended temperature and multi-rail voltage conditions.

Supply support for STM6719SVWB6F 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 components for industrial, automotive, and consumer markets.

The STM67xx series is part of ST's ultra-low-power supervisor product line, engineered specifically for reliable power-on reset and brown-out detection in battery-constrained and multi-rail embedded systems where precision, low IQ, and small footprint are critical.

FAQ

What is the function of the RSTIN pin on STM6719SVWB6F?

RSTIN is a high-impedance input that connects to an external resistor divider to monitor a third supply rail. Internally referenced to a stable 0.626 V bandgap voltage, it enables precise reset assertion when the divided rail voltage drops below this threshold - supporting sub-1 V core supplies common in modern SoCs and FPGAs.

Can STM6719SVWB6F operate with only VCC1 applied?

Yes - the device functions with only VCC1 powered (≥ 0.8 V). VCC2 and RSTIN are optional monitoring inputs. When unused, VCC2 should be left unconnected or tied to VSS; RSTIN must be either connected to the rail being monitored or pulled to VSS via a 100 kΩ resistor to avoid floating node issues.

Is an external pull-up resistor required for the RST output?

Yes - because STM6719SVWB6F features an open-drain RST output, an external pull-up resistor to VCC1 is mandatory. A 10 kΩ resistor is recommended per datasheet guidance; values between 4.7 kΩ and 100 kΩ are acceptable depending on bus capacitance and rise-time requirements.

How does the manual reset (MR) pin behave during power-up?

MR has an internal 50 kΩ pull-up to VCC1, ensuring it defaults high when unasserted. During power-up, RST remains asserted until both VCC1 and VCC2 (if used) exceed their thresholds *and* MR is high for the full trec delay - preventing premature release even if MR floats or glitches early in ramp-up.