Analog Devices Inc. LTC2912HTS8-2#TRPBF

Overview

LTC2912HTS8-2#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, adjustable reset timeout via external capacitor, and dual open-drain OV/UV outputs with independent fault detection. It operates from 2.3V to 6V directly or up to 48V via internal shunt regulator - used in industrial server power sequencing and core voltage margining.

For engineers reviewing the LTC2912HTS8-2#TRPBF datasheet, LTC2912HTS8-2#TRPBF pinout, LTC2912HTS8-2#TRPBF application, or LTC2912HTS8-2#TRPBF equivalent, key selection criteria include its –40°C to 125°C operating range, DIS pin-enabled output disable for margining, guaranteed operation down to VCC = 1V, and TSOT-23-8 package compatibility with space-constrained PCB layouts.

Technical Context

The LTC2912HTS8-2#TRPBF implements dual comparator-based monitoring with independent VH (undervoltage sense) and VL (overvoltage sense) inputs, each filtered to reject sub-50µs 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 = 1nF–10µF.

Unlike variants LTC2912-1 and LTC2912-3, the -2 version integrates a dedicated DIS pin (Pin 1 in TS8) that disables both OV and UV outputs except during VCC undervoltage lockout (UVLO), supporting active margining and dynamic supply validation. The H-grade temperature rating ensures stable threshold performance across –40°C to 125°C.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad (not electrically connected in TS8), RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2912ITS8-2#TRPBF, the LTC2912HTS8-2#TRPBF delivers guaranteed operation at 125°C junction temperature, critical for sealed enclosures; versus LTC2912HDDB-2#TRPBF, it trades thermal efficiency for smaller board area and legacy TSOT-23 compatibility.

Availability

LTC2912HTS8-2#TRPBF is available at Aetrix Electronics and suitable for industrial server power sequencing, automotive ECU supervision, and programmable power supply margining requiring stable component supply across extended temperature ranges.

Supply support for LTC2912HTS8-2#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The LTC2912 product line delivers precision, low-power voltage supervision ICs optimized for space-constrained, high-reliability applications where glitch immunity, wide temperature operation, and flexible reset timing are essential.

FAQ

What is the maximum supply voltage the LTC2912HTS8-2#TRPBF can tolerate on the VCC pin?

The LTC2912HTS8-2#TRPBF VCC pin has an absolute maximum rating of 6V when used as a direct supply input. For higher voltages (e.g., 12V, 24V, or 48V), the internal shunt regulator engages - but a series current-limiting resistor must be added to keep input current ≤10mA. Without this resistor, exceeding 6V risks violating terminal current limits and damaging the device.

How does the DIS pin function on the LTC2912HTS8-2#TRPBF, and what happens during VCC undervoltage lockout?

The DIS pin (Pin 1) on the LTC2912HTS8-2#TRPBF disables both OV and UV outputs when pulled high, except during VCC undervoltage lockout (UVLO). During UVLO (VCC < 1.9V), UV asserts low regardless of DIS state, while OV remains inactive. This ensures fail-safe reset assertion even when DIS is enabled, preserving system safety during brownout conditions.

Can the LTC2912HTS8-2#TRPBF monitor negative voltages?

No, the LTC2912HTS8-2#TRPBF is designed exclusively for positive-supply monitoring. Its VH and VL inputs operate referenced to GND and require input voltages between –0.3V and 7.5V. To supervise negative rails, a level-shifting circuit or a dedicated negative-voltage monitor like the LTC2909 is required - the LTC2912HTS8-2#TRPBF does not support direct negative input sensing.

What is the minimum capacitor value required on the TMR pin of the LTC2912HTS8-2#TRPBF, and why?

The TMR pin of the LTC2912HTS8-2#TRPBF requires a minimum 10pF capacitor to ground. This ensures stable oscillator operation and accurate timeout period generation. Using less than 10pF may cause erratic or shortened reset pulses due to insufficient charge storage for the internal timing circuit - the datasheet explicitly specifies 10pF as the lower bound for reliable tUOTO behavior.

Does the LTC2912HTS8-2#TRPBF provide separate undervoltage and overvoltage reset signals, and how are they configured?

Yes, the LTC2912HTS8-2#TRPBF provides two independent open-drain outputs: UV (Pin 2) asserts low on undervoltage (VH < 0.5V), and OV (Pin 3) asserts low on overvoltage (VL > 0.5V). Both outputs are active-low, share no internal coupling, and can be wired-OR'd with other reset sources. Their timeout periods are jointly set by the TMR capacitor but trigger independently based on respective input conditions.