Analog Devices Inc. LTC2912HTS8-3#TRPBF

Overview

LTC2912HTS8-3#TRPBF from Analog Devices is a high-temperature single UV/OV voltage monitor IC designed for reliable power supply supervision in harsh environments. It features ±1.5% threshold accuracy, 29µA quiescent current, open-drain OV/UV outputs, and operates from 2.3V to 6V (or higher via internal 6.2V shunt regulator). It is used in industrial servers and telecom power systems requiring fail-safe reset assertion under overvoltage or undervoltage conditions.

For engineers reviewing the LTC2912HTS8-3#TRPBF datasheet, LTC2912HTS8-3#TRPBF pinout, LTC2912HTS8-3#TRPBF application, or LTC2912HTS8-3#TRPBF equivalent, key selection criteria include guaranteed operation down to VCC = 1V, adjustable timeout via external capacitor (CTMR), noninverting OV output behavior, and –40°C to 125°C extended temperature grade compatibility with TSOT-23 packaging.

Technical Context

The LTC2912HTS8-3#TRPBF implements dual comparator-based monitoring with independent VH (undervoltage sense) and VL (overvoltage sense) inputs, each filtered to reject sub-500µs glitches. Its internal oscillator drives an adjustable timeout timer (tUOTO) tied to the TMR pin, enabling programmable reset pulse widths from 6ms to >10s using CTMR values from 1nF to 10µF.

Unlike LTC2912-1/-2 variants, the -3 version provides a noninverting OV output that asserts high (weak pull-up to VCC) during overvoltage events and latches high until cleared via the LATCH pin. The device guarantees valid OV/UV output states even at VCC ≥ 1V, supporting brownout-safe system initialization.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad (not electrically connected in TS8 variant), rated for –40°C to 125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2912ITS8-3#TRPBF, the LTC2912HTS8-3#TRPBF delivers guaranteed operation up to 125°C junction temperature - critical for sealed enclosures - while LTC2913IDDB#TRPBF trades single-rail latching for dual-rail capability and eliminates the need for external divider resistors on the second monitored rail.

Availability

LTC2912HTS8-3#TRPBF is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and automotive electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2912HTS8-3#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 precision instrumentation, industrial, communications, and automotive markets.

The LTC2912 product line delivers micropower, high-accuracy voltage supervisors optimized for space-constrained, thermally demanding applications where reliable power sequencing and fault response are mission-critical.

FAQ

What is the maximum supply voltage the LTC2912HTS8-3#TRPBF can tolerate on its VCC pin?

The LTC2912HTS8-3#TRPBF has an absolute maximum VCC pin voltage of 6V when used as a direct supply input. For higher voltages such as 12V, 24V, or 48V, the internal 6.2V shunt regulator must be used with an external series current-limiting resistor to keep input current ≤10mA. Exceeding this current risks damage or degraded accuracy.

How does the LATCH pin affect OV output behavior in the LTC2912HTS8-3#TRPBF?

In the LTC2912HTS8-3#TRPBF, the LATCH pin controls OV output latching: when pulled low, OV latches high upon overvoltage detection and remains high until LATCH is pulled high to clear it. When LATCH is high, OV behaves like UV - asserting high for a programmable timeout period after the overvoltage condition clears.

Can the LTC2912HTS8-3#TRPBF monitor negative voltages?

No, the LTC2912HTS8-3#TRPBF is designed exclusively for positive-supply monitoring. Its VH and VL inputs are referenced to GND and require input voltages between –0.3V and 7.5V. To monitor negative rails, a level-shifting circuit or dedicated negative-voltage supervisor like the LTC2909 is required.

What is the minimum capacitor value required on the TMR pin of the LTC2912HTS8-3#TRPBF?

The TMR pin of the LTC2912HTS8-3#TRPBF requires a minimum 10pF capacitor to ground for stable timeout operation. Values below 10pF may cause erratic timing or failure to assert OV/UV. For precise timeout periods, use NP0/C0G ceramic capacitors with low leakage to avoid drift, especially at elevated temperatures.

Does the LTC2912HTS8-3#TRPBF provide hysteresis on its UV/OV thresholds?

The LTC2912HTS8-3#TRPBF does not implement input hysteresis on VH or VL thresholds. Instead, it uses internal low-pass filtering to reject short-duration glitches - providing noise immunity without introducing hysteresis-induced trip-point uncertainty. This maintains ±1.5% threshold accuracy across temperature while ensuring robust operation in electrically noisy environments.