Analog Devices Inc. LTC2934ITS8-2#TRPBF

Overview

LTC2934ITS8-2#TRPBF from Analog Devices (formerly Linear Technology) is an ultra-low power, adjustable voltage supervisor IC with independent power-fail and reset functions, 500nA typical quiescent current, ±1.5% threshold accuracy over temperature, and active-pull-up RST/PFO outputs. It operates down to 1.6V supply and supports manual reset and selectable 15ms/200ms reset timeout - ideal for coin-cell–powered security sensors and portable medical monitors.

For engineers reviewing the LTC2934ITS8-2#TRPBF datasheet, LTC2934ITS8-2#TRPBF pinout, LTC2934ITS8-2#TRPBF application, or LTC2934ITS8-2#TRPBF equivalent, key selection criteria include its 0.4V internal comparator reference, ADJ/PFI input leakage <±1nA, RT-controlled timeout, TSOT-23-8 package footprint, and compatibility with 1.6–5.5V systems requiring early power-fail warning and glitch-immune reset assertion.

Technical Context

The LTC2934ITS8-2#TRPBF integrates two independent comparators - one monitoring ADJ for reset generation and another monitoring PFI for power-fail detection - both referenced to a precision 0.4V internal bandgap. Each features programmable hysteresis (20mV for ADJ, 10mV for PFI) and is designed to reject sub-1ms transients per the glitch immunity curve.

Its active-pull-up output architecture (LTC2934-2 variant) drives RST and PFO directly to VCC without external resistors, eliminating pull-up power loss while limiting output voltage to VCC + 0.3V. The RT pin selects between 15ms and 200ms reset timeout periods via logic-level control, and MR provides debounced manual reset with 20μs minimum pulse width.

Key Specifications

Pinout & Package

Package: 8-Lead TSOT-23 (ThinSOT™), 2.9mm × 1.6mm × 0.8mm body, lead-free, RoHS-compliant. Exposed pad not present in TSOT-23 variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2934ITS8-2#TRPBF, LTC2935ITS8#TRPBF reduces external component count but removes manual reset and independent PFO signaling, while LTC2909ITS8-3#TRPBF adds OV/negative monitoring at the cost of tripled ICC and loss of dedicated power-fail output - making LTC2934ITS8-2#TRPBF optimal for ultra-low-power, single-supply, early-warning–critical applications.

Availability

LTC2934ITS8-2#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered security alarms, and industrial handheld scanners requiring stable component supply with guaranteed long-term availability and full industrial temperature support.

Supply support for LTC2934ITS8-2#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 acquired Linear Technology in 2017 and maintains its precision analog and power management portfolio with rigorous automotive and industrial qualification standards.

The LTC2934 product line delivers ultra-low-power, high-accuracy voltage supervision for battery-critical applications - designed specifically for extended-life portable equipment where every nanoamp and millivolt matters.

FAQ

What is the minimum supply voltage required for LTC2934ITS8-2#TRPBF to assert valid reset and power-fail outputs?

LTC2934ITS8-2#TRPBF begins functional operation at VCC ≥ 1.6V. Both RST and PFO outputs become active once VCC reaches ~1.0V (maximum turn-on threshold), but full specification compliance - including ±1.5% threshold accuracy and guaranteed 500nA ICC - is ensured only from 1.6V to 5.5V per the Absolute Maximum Ratings table.

How does the LTC2934ITS8-2#TRPBF differ from the LTC2934ITS8-1#TRPBF variant?

The LTC2934ITS8-2#TRPBF uses active-pull-up outputs for RST and PFO, driving them directly to VCC without external resistors. In contrast, LTC2934ITS8-1#TRPBF provides open-drain outputs requiring external pull-ups. This makes LTC2934ITS8-2#TRPBF preferable for ultra-low-power designs where pull-up resistor current would dominate system ICC.

Can the ADJ and PFI inputs of LTC2934ITS8-2#TRPBF be tied to the same voltage node?

Yes - ADJ and PFI can share a single resistor divider from the monitored rail, enabling coordinated reset and power-fail thresholds (e.g., 2.55V reset, 2.73V PFO). However, matching tolerance between thresholds is limited to ±8mV (VTHM), so independent dividers are recommended when tighter separation (e.g., >200mV) is required.

What is the maximum allowable leakage current on the MR pin for reliable manual reset operation in LTC2934ITS8-2#TRPBF?

The MR pin has an internal 900kΩ pull-up to VCC and a logic-low threshold of 0.4V. To ensure reliable low-state detection, external leakage must not raise MR above 0.4V when intended low. With VCC = 3.6V, maximum tolerable leakage is ~3.6μA (3.6V ÷ 900kΩ – 0.4V ÷ 900kΩ), though design margin suggests keeping leakage <1μA.

Does LTC2934ITS8-2#TRPBF support operation at –40°C, and are all specifications guaranteed across that range?

Yes - LTC2934ITS8-2#TRPBF is rated for –40°C to +85°C (I-grade). All electrical characteristics marked with "l" in the datasheet - including 500nA ICC, ±1.5% threshold accuracy, 400mV comparator reference, and 15ms/200ms timeout options - are fully specified and production-tested across this full industrial temperature range.