STMicroelectronics STM6717TGWY6F

Overview

STM6717TGWY6F from STMicroelectronics is a dual ultra-low-voltage supervisor IC with push-button reset and fixed factory-programmed thresholds (VCC1 = 4.63 V, VCC2 = 3.08 V), open-drain active-low RST output, and guaranteed reset assertion down to VCC1/VCC2 ≥ 0.8 V. It monitors primary and secondary power rails in battery-powered embedded systems and delivers 13.2 ms / 210 ms / 900 ms selectable power-up reset delay.

For engineers reviewing the STM6717TGWY6F datasheet, STM6717TGWY6F pinout, STM6717TGWY6F application, or STM6717TGWY6F equivalent, this device supports precise dual-rail monitoring with manual reset immunity, low 11 µA supply current at 3.6 V, and SOT23-5 packaging for space-constrained industrial and portable designs.

Technical Context

The STM6717TGWY6F implements independent voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds (4.63 V and 3.08 V respectively), and combines their outputs with MR assertion via wired-OR logic to drive the open-drain RST pin. Its internal reference enables reliable reset generation even during brown-out conditions.

Reset assertion is sustained for trec (13.2/210/900 ms typ) after all monitored supplies exceed thresholds and MR returns high; RST remains valid with external 10 kΩ pull-up to VCC1, and the MR input includes a 50 kΩ internal pull-up for direct switch interfacing without external biasing.

Key Specifications

Pinout & Package

SOT23-5 (WY) package: 5-pin surface-mount, 1.3 mm × 2.9 mm footprint, 1.45 mm height, JEDEC MO-178 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G18DBVR and MAX6326UT29D3+, the STM6717TGWY6F uniquely integrates dual-rail monitoring, factory-trimmed thresholds, and MR functionality in a 5-pin SOT23-reducing solution size and eliminating calibration while supporting field serviceability and robust multi-rail sequencing.

Availability

STM6717TGWY6F is available at Aetrix Electronics and suitable for set-top box power sequencing, portable medical sensor nodes, industrial Ethernet gateways, and smart home hub controllers requiring stable component supply across extended product lifecycles.

Supply support for STM6717TGWY6F 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, and analog/mixed-signal devices for industrial, automotive, and consumer markets.

The STM67xx family targets ultra-low-power, dual-rail supervision in space-constrained portable and industrial systems-emphasizing factory-trimmed accuracy, minimal external components, and guaranteed operation down to 0.8 V supply.

FAQ

What is the function of the MR pin, and how should it be connected?

The MR pin is an active-low manual reset input with an integrated 50 kΩ pull-up resistor to VCC1. It should be connected directly to VSS via a normally open momentary switch-no external resistor or debounce circuitry is required. Driving MR low forces RST low immediately and holds it for trec after MR returns high, enabling field-initiated system recovery without firmware involvement.

Can STM6717TGWY6F monitor a 1.8 V supply as VCC2?

No. The STM6717TGWY6F has a fixed VCC2 threshold of 3.08 V, factory-programmed and not adjustable. It is designed to monitor rails near 3.3 V (e.g., I/O or memory supplies), not sub-2.5 V domains. For 1.8 V monitoring, a different supervisor such as the STM6315 (1.78 V threshold) or externally resistor-divided input would be required.

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

Yes-an external pull-up resistor is mandatory because RST is open-drain. A 10 kΩ resistor to VCC1 is specified in the datasheet and sufficient for most applications. This ensures proper logic-high level when RST is inactive and maintains compatibility with bi-directional processor reset pins when used with a 4.7 kΩ series resistor per Figure 11.

Does STM6717TGWY6F support operation below 0.8 V on VCC1 or VCC2?

No. The device guarantees correct RST output logic state only when VCC1 or VCC2 is ≥ 0.8 V. Below this, internal comparators and logic may become indeterminate. For systems requiring reset assertion down to 0 V, a pull-down resistor on the RST line is ineffective with open-drain configuration-this part is not intended for zero-voltage fail-safe operation.