Analog Devices Inc./Maxim Integrated MAX6719UTRVD1+T

Overview

MAX6719UTRVD1+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds of 4.625V (VTH1) and 3.075V (VTH2), 1.1ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in multivoltage telecom power systems for reliable brownout detection and system reset initiation.

For engineers reviewing the MAX6719UTRVD1+T datasheet, MAX6719UTRVD1+T pinout, MAX6719UTRVD1+T application, or MAX6719UTRVD1+T equivalent, key selection factors include its dual-supply monitoring capability with externally adjustable third-voltage input, push-pull RST output, manual reset input with internal 50kΩ pullup, and immunity to short VCC transients in battery-operated and industrial embedded designs.

Technical Context

The MAX6719UTRVD1+T implements independent voltage comparators for VCC1 (1.58–4.63V range) and VCC2 (0.79–3.08V range), plus an adjustable RSTIN input referenced to a 626.5mV internal bandgap reference. Its reset logic asserts active-low RST when any monitored voltage falls below threshold and holds for a fixed 1.1ms (min) timeout after recovery.

This device integrates a manual reset input (MR) with 200ns MR-to-reset delay and 1µs minimum pulse width, operates over –40°C to +85°C, and draws only 14µA typical supply current at 3.6V - enabling low-power supervision in portable equipment without compromising noise immunity or timing accuracy.

Key Specifications

Pinout & Package

MAX6719UTRVD1+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, lead-free (+T suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX6720UTRVD1+T and TPS3808G12DBVR, the MAX6719UTRVD1+T uniquely delivers push-pull RST for direct µP interface, factory-trimmed dual thresholds matching standard rails, and RSTIN-based third-voltage monitoring - making it the only option supporting true triple-supply supervision in a 6-pin SOT23 without external components.

Availability

MAX6719UTRVD1+T is available at Aetrix Electronics and suitable for telecom power management, industrial PLC I/O modules, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for MAX6719UTRVD1+T 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.

The MAX6715–MAX6729 family was designed specifically for space-constrained, multivoltage embedded systems requiring precise, low-power, and glitch-immune microprocessor supervision - with emphasis on SOT23 integration and factory-trimmed accuracy.

FAQ

What is the exact reset timeout period for MAX6719UTRVD1+T?

The MAX6719UTRVD1+T has a minimum reset timeout period of 1.1ms, as indicated by the "D1" suffix in its part number. This value is guaranteed over the full –40°C to +85°C operating temperature range and applies after all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds or after MR returns high. Typical timeout is 1.65ms, with maximum 2.2ms under worst-case conditions.

Does MAX6719UTRVD1+T support monitoring a negative voltage?

Yes - the RSTIN input of MAX6719UTRVD1+T can monitor negative supplies when used with an appropriate resistor-divider network, as documented in Figure 3b of the datasheet. The internal 626.5mV reference remains valid, and PFO (if present) would invert logic accordingly; however, MAX6719UTRVD1+T does not include PFI/PFO functionality - that feature is reserved for MAX6728/MAX6729 variants.

What is the function of the MR pin on MAX6719UTRVD1+T?

The MR (Manual Reset) pin on MAX6719UTRVD1+T is an active-low input with an internal 50kΩ pullup to VCC1. Pulling MR low forces an immediate reset assertion on the RST output for the full 1.1ms timeout period, regardless of supply voltage status. It accepts TTL/CMOS logic levels and requires a minimum 1µs pulse width; debouncing is unnecessary due to built-in 100ns glitch rejection.

Can MAX6719UTRVD1+T supervise a 1.2V core supply?

No - MAX6719UTRVD1+T is factory-trimmed for VCC1 = 4.625V and VCC2 = 3.075V thresholds and does not support user-adjustable thresholds for VCC1/VCC2. To supervise a 1.2V rail, use the RSTIN pin with an external resistor-divider: set R1/R2 so RSTIN = 626.5mV when the 1.2V rail reaches its undervoltage limit (e.g., 1.08V), yielding a trip point of 1.08V × (R2/(R1+R2)) = 626.5mV.

Is MAX6719UTRVD1+T pin-compatible with other MAX67xx devices in SOT23-6?

MAX6719UTRVD1+T shares the same 6-pin SOT23-6 pinout with MAX6715–MAX6722 and MAX6723–MAX6724, but functional differences exist: MAX6719UTRVD1+T includes RSTIN and push-pull RST, whereas MAX6715/MAX6716 lack RSTIN, and MAX6720 has open-drain RST. Pin compatibility does not imply functional interchangeability - verify reset type, voltage thresholds, and feature set before substitution.