STMicroelectronics STM6719TGWB6F

Overview

STM6719TGWB6F from STMicroelectronics is a dual-supply ultra-low-voltage supervisor IC with push-button reset, open-drain RST output, and adjustable third-supply monitoring via RSTIN pin. It monitors VCC1 (factory-trimmed threshold: 2.93 V) and VCC2 (factory-trimmed threshold: 1.58 V), guarantees RST state down to VCC ≥ 0.8 V, and delivers 13.2 ms/210 ms/900 ms selectable power-on reset delay - used in battery-powered networking equipment for reliable cold-start sequencing.

For engineers reviewing the STM6719TGWB6F datasheet, STM6719TGWB6F pinout, STM6719TGWB6F application, or STM6719TGWB6F equivalent, key selection criteria include dual fixed-threshold supply monitoring, open-drain RST compatibility with bi-directional processor reset pins, RSTIN-based tertiary voltage supervision, low 11 µA supply current, and SOT23-6 package footprint compatibility with space-constrained embedded designs.

Technical Context

The device implements three independent voltage comparators: one for VCC1 (4.63 V–1.58 V factory-programmed), one for VCC2 (3.08 V–0.79 V), and one for RSTIN referenced to a 0.626 V internal bandgap. Reset assertion occurs if any monitored voltage falls below its threshold or MR is pulled low.

Reset release is synchronized to trec delay (13.2/210/900 ms typ) after all supplies exceed thresholds and MR returns high. The open-drain RST output requires external pull-up to VCC1 and remains valid down to VCC1 ≥ 0.8 V, enabling robust reset signaling during brown-out conditions.

Key Specifications

Pinout & Package

SOT23-6 (WB) package: 6-pin surface-mount, 1.3 mm × 2.9 mm body, 0.95 mm pitch, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6816EUT+T and TPS3808G18DBVR, STM6719TGWB6F uniquely integrates dual fixed-threshold monitoring plus RSTIN-based third-supply supervision in a single SOT23-6 package - reducing BOM count and PCB area where multi-rail reliability is mandatory.

Availability

STM6719TGWB6F is available at Aetrix Electronics and suitable for industrial IoT gateways, portable medical monitors, home network routers, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for STM6719TGWB6F 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 products for industrial, automotive, and consumer markets.

STM67xx is ST's ultra-low-voltage supervisor product line targeting battery-powered and multi-rail embedded systems requiring precise, low-quiescent-current power monitoring and reset control.

FAQ

What is the factory-trimmed VCC1 reset threshold for STM6719TGWB6F?

The STM6719TGWB6F has a factory-trimmed VCC1 reset threshold of 2.93 V, with ±1.5% tolerance over temperature (–40 °C to +85 °C). This value is laser-trimmed during production and cannot be modified. It is specified in Table 6 (DC and AC characteristics) of the official datasheet (Doc ID 11469 Rev 8, page 19).

Can RSTIN be used to monitor a 1.2 V supply, and how is the resistor divider calculated?

Yes. With the 0.626 V internal reference, a 1.2 V rail is monitored using R1 and R2 such that V_RSTIN = 0.626 V = 1.2 V × R2/(R1 + R2). For example, R2 = 100 kΩ yields R1 ≈ 91.8 kΩ. Standard 1% resistors (e.g., 100 kΩ and 91 kΩ) achieve <0.5% error. Divider current should exceed 100 nA to avoid leakage-induced offset.

Is an external pull-up resistor required on the RST pin, and what value is recommended?

Yes - because STM6719TGWB6F features an open-drain RST output. A pull-up to VCC1 is mandatory. ST recommends 10 kΩ for most applications; values from 4.7 kΩ to 100 kΩ are acceptable depending on bus capacitance and rise-time requirements. Lower values improve noise immunity but increase static current.

Does STM6719TGWB6F support manual reset delay via capacitor, like the STM6779 series?

No. STM6719TGWB6F does not include the MRC (manual reset delay) pin. That feature is exclusive to the STM6777/78/79/80 variants. STM6719 provides only the standard MR input with immediate assertion and trec-delayed release - no external capacitor-based delay is possible on this part.