STMicroelectronics STM6717SJWY6F

Overview

STM6717SJWY6F from STMicroelectronics is a dual ultra-low-voltage supervisor IC with push-button reset, monitoring primary supply (VCC1) and secondary supply (VCC2), featuring factory-programmed reset thresholds of 4.63 V and 3.08 V respectively, open-drain active-low RST output, and guaranteed reset state down to VCC1 ≥ 0.8 V - used in set-top boxes and portable battery-powered systems.

For engineers reviewing the STM6717SJWY6F datasheet, STM6717SJWY6F pinout, STM6717SJWY6F application, or STM6717SJWY6F equivalent, key selection criteria include dual-supply monitoring capability, manual reset input with internal 50 kΩ pull-up, SOT23-5 package compatibility, and industrial-grade temperature operation from –40 °C to 85 °C.

Technical Context

This supervisor implements independent voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds (4.63 V and 3.08 V), and combines their outputs with MR assertion via wired-OR logic to drive the open-drain RST pin. The device guarantees valid reset assertion even when only one supply exceeds 0.8 V.

Reset delay time (trec) is fixed at 13.2 ms (typ), and the MR input includes internal 50 kΩ pull-up to VCC1, supporting direct connection to momentary switches or TTL/CMOS logic without external biasing. No MRC or RSTIN functionality is present in this variant.

Key Specifications

Pinout & Package

SOT23-5 (WY) package: 5-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 STM6717SJWY6F, TPS3808G18DBVR reduces integration by omitting VCC2 monitoring and open-drain flexibility, while MAX6816EUT+T provides no voltage supervision at all - making STM6717SJWY6F uniquely suited for compact dual-rail systems requiring guaranteed low-VCC reset behavior.

Availability

STM6717SJWY6F is available at Aetrix Electronics and suitable for set-top box manufacturing, portable medical instrumentation, and industrial gateway development requiring stable component supply and long-term industrial-grade availability.

Supply support for STM6717SJWY6F 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 analog, microcontroller, power, and sensing solutions for industrial, automotive, and consumer markets.

The STM67xx family targets ultra-low-power, dual-supply supervision in space- and energy-constrained applications such as STBs, portable electronics, and networking equipment - emphasizing factory-trimmed accuracy and guaranteed operation down to 0.8 V.

FAQ

What is the function of the MR pin, and does it require an external pull-up?

The MR pin is an active-low push-button reset input with an internal 50 kΩ pull-up resistor to VCC1. It requires no external pull-up and can be directly connected to a momentary switch tied to VSS. Driving MR low asserts RST immediately, and RST remains low for 13.2 ms after MR returns high - providing hardware-level reset debouncing without additional components.

Can STM6717SJWY6F monitor a 1.8 V supply?

No - STM6717SJWY6F has factory-programmed thresholds of 4.63 V on VCC1 and 3.08 V on VCC2. It cannot monitor 1.8 V directly. For lower thresholds, consider STM6719/6720 variants with RSTIN pin (0.626 V internal reference) enabling adjustable monitoring via external resistor divider, or alternate supervisors like TPS3808G12.

Is the RST output compatible with a microcontroller that expects an active-high reset signal?

STM6717SJWY6F provides only active-low RST (open-drain). To interface with an active-high reset input, add an external inverter (e.g., 74LVC1G04) or use a pull-up to a higher voltage rail followed by an N-channel MOSFET level shifter. Do not connect directly - the open-drain RST cannot drive high without external biasing.

Does this device support delayed manual reset (MRC) functionality?

No - STM6717SJWY6F is a SOT23-5 variant without MRC pin. Delayed manual reset is exclusive to STM6777/6778/6779/6780 series (SOT23-6 packages). For delay capability, select STM6777SJWY6F (same package, adds MRC pin and 6 µs–4 s programmable delay via external capacitor).