Analog Devices Inc. LTC2919IMS-3.3#TRPBF

Overview

LTC2919IMS-3.3#TRPBF from Analog Devices is a triple-input precision voltage supervisor IC with two adjustable 0.5V-threshold inputs and a fixed -10% VCC UVLO for 3.3V supply monitoring. It delivers ±1.5% threshold accuracy over –40°C to +85°C, 50µA quiescent current, and open-drain RST/OUT1/OUT2 outputs. Used in automotive power sequencing and industrial core-I/O monitoring where reliable brownout detection and polarity-selectable fault coverage are required.

For engineers reviewing the LTC2919IMS-3.3#TRPBF datasheet, LTC2919IMS-3.3#TRPBF pinout, LTC2919IMS-3.3#TRPBF application, or LTC2919IMS-3.3#TRPBF equivalent, key selection factors include its 3.3V-specific VCC UVLO threshold (2.871–2.970V), SEL-configurable positive/negative polarity per input, internal 200ms reset timeout, and MSOP-10 package compatibility with space-constrained PCB layouts.

Technical Context

The LTC2919IMS-3.3#TRPBF implements dual independent comparator channels with user-selectable polarity via the three-state SEL pin, enabling simultaneous UV/OV monitoring of mixed-polarity supplies (e.g., +3.3V and –5V). Its third monitoring channel uses the VCC pin's accurate –10% UVLO (2.871V min, 2.970V max) to supervise the 3.3V supply itself.

Reset behavior is governed by a configurable timeout: internally fixed at 200ms (TMR = GND), externally programmable via capacitor (9ms/nF), or disabled for comparator-mode operation (TMR = VCC). Glitch filtering on ADJ inputs and propagation delay (50–800µs) prevent false triggering from transients without sacrificing threshold precision.

Key Specifications

Pinout & Package

10-Lead Plastic MSOP package with exposed thermal pad (pin 11 not present in MSOP; DFN variant only). Pin 1 = SEL, Pin 2 = VCC, Pin 3 = OUT1, Pin 4 = OUT2, Pin 5 = RST, Pin 6 = GND, Pin 7 = REF, Pin 8 = TMR, Pin 9 = ADJ2, Pin 10 = ADJ1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TPS3808G33DBVR and MAX6816EUT+T, the LTC2919IMS-3.3#TRPBF provides integrated dual adjustable monitoring, SEL-driven polarity configuration, and a 1V buffered reference - enabling complete multi-rail supervision in one MSOP-10 device without external timing or reference components.

Availability

LTC2919IMS-3.3#TRPBF is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and network infrastructure applications requiring stable component supply, AEC-Q100-compliant operation, and precise 3.3V supply supervision.

Supply support for LTC2919IMS-3.3#TRPBF 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2919IMS-3.3#TRPBF belongs to Analog Devices' precision voltage supervisor product line, engineered for high-accuracy, low-power system monitoring in harsh environments where reliability and timing determinism are critical.

FAQ

What is the exact VCC UVLO threshold range for LTC2919IMS-3.3#TRPBF?

The LTC2919IMS-3.3#TRPBF has a guaranteed VCC UVLO threshold range of 2.871V to 2.970V at –40°C to +85°C, corresponding to –10% of 3.3V with ±1.5% accuracy. This is specified in the Electrical Characteristics table under VCC(UVLO) for the -3.3 variant and applies across the full I-grade temperature range.

Can LTC2919IMS-3.3#TRPBF monitor negative voltages, and how is it configured?

Yes, LTC2919IMS-3.3#TRPBF can monitor negative voltages using its ADJ1 and ADJ2 inputs with polarity selected via the SEL pin. When SEL = GND, both inputs operate in negative polarity mode - detecting undervoltage (e.g., –4.3V on a –5V rail) or overvoltage (e.g., –5.5V on a –5V rail). The REF pin provides a 1V buffered reference to bias the resistor divider.

Does LTC2919IMS-3.3#TRPBF require external components for basic 3.3V supply monitoring?

No - LTC2919IMS-3.3#TRPBF requires only a 0.1µF bypass capacitor on VCC for stable operation when monitoring the 3.3V supply. Its internal 200ms reset timeout (enabled by tying TMR to GND) and fixed VCC UVLO eliminate the need for external timing capacitors or reference sources in basic single-supply applications.

What is the maximum sink current capability of the RST, OUT1, and OUT2 pins on LTC2919IMS-3.3#TRPBF?

The RST, OUT1, and OUT2 pins of LTC2919IMS-3.3#TRPBF guarantee VOL ≤0.15V at VCC = 3V with 2500µA sink current, and ≤0.30V at 2500µA across the full operating range. This allows direct interfacing with 3.3V logic families and robust driving of standard pull-up resistors without external buffers.

How does the SEL pin affect the functionality of LTC2919IMS-3.3#TRPBF in a dual-positive-supply monitoring setup?

In a dual-positive-supply setup, setting SEL = VCC configures both ADJ1 and ADJ2 for positive polarity, enabling independent UV monitoring of two rails (e.g., 3.3V and 5V). Each ADJ input uses a resistor divider to scale the supply down to ~0.5V, and the corresponding OUT pin asserts low if its rail drops below the programmed threshold.