Analog Devices Inc. LTC2935ITS8-1#TRPBF

Overview

LTC2935ITS8-1#TRPBF from Analog Devices (formerly Linear Technology) is an ultra-low power voltage supervisor IC with open-drain reset and power-fail outputs, eight pin-selectable reset thresholds (2.25V–3.30V), ±1.5% threshold accuracy over temperature, and 500nA typical quiescent current - designed for battery-powered portable equipment requiring reliable early-warning low-voltage detection and system reset.

For engineers reviewing the LTC2935ITS8-1#TRPBF datasheet, LTC2935ITS8-1#TRPBF pinout, LTC2935ITS8-1#TRPBF application, or LTC2935ITS8-1#TRPBF equivalent, this device delivers precise, configurable supervision in a compact TSOT-23-8 package with –40°C to +85°C industrial temperature range, 200ms reset timeout, and integrated hysteresis for noise immunity in space-constrained, energy-sensitive designs.

Technical Context

The LTC2935ITS8-1#TRPBF implements dual-comparator supervision: one for reset generation (RST) at a user-selected falling threshold (e.g., 2.25V–3.30V), and a second for early warning (PFO) at a fixed offset above that threshold (150mV higher for -1/-2 variants). Its internal precision attenuators and reference circuitry enable stable threshold selection across temperature without external resistors.

It features a manual reset input (MR) with internal 900kΩ pull-up, 20μs minimum pulse width support, and 200ms debounced release timing; both RST and PFO outputs are open-drain, rated for ±5mA sink current and compatible with pull-up voltages up to 6V - enabling interface with logic domains independent of VCC.

Key Specifications

Pinout & Package

Package: 8-Lead TSOT-23 (ThinSOT™), 2.9mm × 1.6mm footprint, exposed pad optional for thermal enhancement. Compatible with standard SMT reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2935ITS8-2#TRPBF, the LTC2935ITS8-1#TRPBF offers greater interface flexibility at the cost of two external pull-ups; versus LTC2934ITS8-1#TRPBF, it trades resistor-based adjustability for guaranteed accuracy and zero-component simplicity in production.

Availability

LTC2935ITS8-1#TRPBF is available at Aetrix Electronics and suitable for battery-powered portable equipment, wireless sensor nodes, point-of-sale terminals, and security system peripherals requiring stable component supply with long-lifecycle assurance.

Supply support for LTC2935ITS8-1#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 high-performance analog and power management portfolio with rigorous qualification standards and long-term product support.

The LTC2935 series was designed specifically for ultra-low-power system supervision in portable and battery-critical applications - emphasizing nanoscale quiescent current, precision threshold stability, and minimal external component count.

FAQ

What is the maximum supply voltage for LTC2935ITS8-1#TRPBF?

The absolute maximum VCC rating for LTC2935ITS8-1#TRPBF is 6V, but the recommended operating range is 1V to 5.5V. Exceeding 5.5V may compromise long-term reliability or parametric performance, and operation below 1V disables internal comparators. The device remains functional across this full range while maintaining 500nA typical quiescent current.

How does the power-fail threshold relate to the reset threshold in LTC2935ITS8-1#TRPBF?

In LTC2935ITS8-1#TRPBF, the power-fail threshold (PFO) is fixed at exactly 150mV above the selected reset threshold (RST) - for example, selecting 2.70V reset yields a 2.85V PFO trip point. This offset is factory-trimmed and holds across temperature (±20mV variation), enabling predictable early-warning timing without external components.

Can LTC2935ITS8-1#TRPBF monitor a voltage different from its supply rail?

No - LTC2935ITS8-1#TRPBF monitors only the VCC pin, which serves simultaneously as its power source and the voltage under supervision. It lacks a separate sense input. To supervise a different rail (e.g., 5V while powered from 3.3V), an external resistor divider or dedicated supervisor like LTC2909 would be required.

What is the reset timeout behavior of LTC2935ITS8-1#TRPBF during power-up?

When VCC rises above the selected reset threshold, LTC2935ITS8-1#TRPBF initiates a 200ms internal timer only after VCC exceeds the threshold by 5% hysteresis. RST remains low until the timer expires, ensuring stable power before releasing the microcontroller reset line - critical for reliable boot sequences in low-noise, low-current systems.

Is the manual reset input (MR) of LTC2935ITS8-1#TRPBF debounced in hardware?

Yes - LTC2935ITS8-1#TRPBF includes built-in hardware debounce: asserting MR low forces RST low immediately, and RST remains low for a guaranteed 200ms after MR returns high, regardless of switch bounce. This eliminates need for external RC filters or firmware debouncing, simplifying design and improving robustness in noisy mechanical switch environments.