STMicroelectronics STM6717SVWY6F

Overview

STM6717SVWY6F from STMicroelectronics is a dual ultra-low-voltage supervisor IC with push-button reset and open-drain active-low RST output, monitoring VCC1 (factory-trimmed 4.63 V threshold) and VCC2 (3.08 V threshold), operating from –40 °C to +85 °C with 11 µA supply current at 3.6 V. It supports power-up reset delay of 13.2 ms (typ), manual reset via MR pin, and guarantees valid RST state when VCC1 or VCC2 ≥ 0.8 V - used in battery-powered STBs and portable communication systems.

For engineers reviewing the STM6717SVWY6F datasheet, STM6717SVWY6F pinout, STM6717SVWY6F application, or STM6717SVWY6F equivalent, key selection criteria include dual-supply monitoring thresholds, SOT23-5 open-drain RST compatibility with bi-directional processor reset pins, guaranteed reset assertion below 0.8 V supply, and absence of MRC/RSTIN pins - distinguishing it from STM677x/6719/6720 variants.

Technical Context

This supervisor implements independent voltage comparators for VCC1 and VCC2, each with factory-programmed thresholds (4.63 V and 3.08 V respectively), feeding into a logic-controlled reset generator with fixed 13.2 ms timeout (trec). The RST output is open-drain, requiring external pull-up to VCC1, and remains asserted low until both supplies exceed thresholds and MR returns high.

MR features an internal 50 kΩ pull-up to VCC1 and accepts TTL/CMOS or switch-driven inputs; no external debounce is needed. The device operates reliably across industrial temperature range and maintains reset integrity down to VCC = 0.8 V - critical for brown-out detection in low-power embedded systems without tertiary monitoring or delay-capable manual reset.

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 STM6717SVWY6F, STM6718SVWY6F offers push-pull convenience at identical monitoring specs, while TPS3808G18DBVR trades dual-rail functionality for lower current and longer delay - making STM6717SVWY6F optimal for cost-sensitive, space-constrained dual-supply applications needing open-drain flexibility.

Availability

STM6717SVWY6F is available at Aetrix Electronics and suitable for set-top boxes, portable medical monitors, and industrial Ethernet switches requiring stable component supply with guaranteed long-term availability and full traceability.

Supply support for STM6717SVWY6F 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The STM67xx family was designed specifically for ultra-low-power, dual-rail voltage supervision in space-constrained portable and networking equipment - emphasizing factory-trimmed accuracy, minimal external components, and guaranteed reset behavior down to 0.8 V.

FAQ

What is the function of the MR pin, and does it require 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 accepts direct connection to a momentary switch between MR and VSS, requiring no external pull-up. Driving MR low asserts RST immediately, and RST remains low for 13.2 ms after MR returns high. This integrated pull-up reduces BOM count and eliminates layout sensitivity to noise on long traces.

Can STM6717SVWY6F monitor a 2.5 V supply?

No - STM6717SVWY6F has factory-programmed thresholds of 4.63 V on VCC1 and 3.08 V on VCC2. It cannot monitor 2.5 V directly. For 2.5 V supervision, use STM6719/6720/6779/6780 variants with RSTIN pin and external resistor divider referencing the 0.626 V internal comparator, or select a different supervisor with adjustable or 2.5 V fixed threshold.

Is the RST output compatible with a processor having a bidirectional reset pin?

Yes - the open-drain RST output is explicitly designed for bidirectional processor reset interfaces. Connect RST directly to the processor's reset I/O pin using a 4.7 kΩ series resistor (per Figure 11 in datasheet) to prevent logic contention. No level-shifting or additional buffering is required, and the 0.8 V minimum valid VCC ensures reset integrity during brown-out transitions.

Does STM6717SVWY6F support delayed manual reset (MRC) or adjustable reset threshold (RSTIN)?

No - STM6717SVWY6F belongs to the base variant group (STM6717/18) and lacks both MRC and RSTIN pins. It provides only fixed dual-threshold monitoring and basic MR functionality. For delayed manual reset, choose STM6777/78/79/80; for adjustable third-rail monitoring, select STM6719/20/79/80 - both require SOT23-6 (WB) packaging and differ in pinout and feature set.