Analog Devices Inc. LTC2934CTS8-2#TRMPBF

Overview

LTC2934CTS8-2#TRMPBF from Analog Devices (formerly Linear Technology) is an ultra-low power adjustable voltage supervisor IC with active-pull-up reset and power-fail outputs, designed for battery-critical systems requiring precise 0.4V threshold monitoring, 500nA quiescent current, and selectable 15ms/200ms reset timeout - deployed in coin-cell–powered security sensors and portable medical monitors.

For engineers reviewing the LTC2934CTS8-2#TRMPBF datasheet, LTC2934CTS8-2#TRMPBF pinout, LTC2934CTS8-2#TRMPBF application, or LTC2934CTS8-2#TRMPBF equivalent, key selection criteria include its TSOT-23-8 package, LTC2934-2 active-pull-up output logic, ±1.5% threshold accuracy over temperature, and dual independent 0.4V comparator inputs (ADJ and PFI) with hysteresis.

Technical Context

The LTC2934CTS8-2#TRMPBF integrates two independent precision comparators: one monitoring ADJ for reset generation (with 5% hysteresis on rising edge), and another monitoring PFI for early power-fail warning (with 2.5% hysteresis). Its internal reset timer is controlled by the RT pin, selecting either 15ms or 200ms delay after threshold recovery.

Unlike open-drain variants, the LTC2934-2 version features active pull-up outputs (RST and PFO) referenced to VCC, eliminating external pull-up resistors while restricting output voltage to ≤VCC. It operates down to 1.6V supply and draws only 225–1000nA across temperature.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic TSOT-23 (2.9mm × 1.6mm × 0.8mm), RoHS-compliant, lead-free finish, rated for 0°C to 70°C ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2935ITS8#TRMPBF and LTC2909IDDB#TRMPBF, the LTC2934CTS8-2#TRMPBF delivers optimal trade-off between ultra-low IQ, dual independent adjustability, and compact TSOT-23 packaging - making it uniquely suited for cost-sensitive, battery-limited applications demanding custom threshold tuning.

Availability

LTC2934CTS8-2#TRMPBF is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered security alarms, and point-of-sale terminals requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LTC2934CTS8-2#TRMPBF 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 continues to manufacture and support its precision analog portfolio, including ultra-low-power supervisors and signal conditioning ICs.

The LTC2934 product line was designed specifically for energy-constrained, battery-operated systems requiring high-accuracy voltage monitoring with sub-μA quiescent current and configurable dual-threshold supervision.

FAQ

What is the operating temperature range for the LTC2934CTS8-2#TRMPBF?

The LTC2934CTS8-2#TRMPBF is specified for 0°C to 70°C ambient operation, as indicated by the "C" grade suffix in the part number. This distinguishes it from the "I" grade (–40°C to 85°C) versions like LTC2934ITS8-2#TRMPBF. The TSOT-23 package has a θJA of 195°C/W, and maximum junction temperature is 125°C.

How does the LTC2934CTS8-2#TRMPBF differ from the LTC2934CTS8-1#TRMPBF?

The LTC2934CTS8-2#TRMPBF features active-pull-up RST and PFO outputs that drive high to VCC, eliminating external pull-up resistors. In contrast, the LTC2934CTS8-1#TRMPBF uses open-drain outputs requiring external pull-ups and allowing outputs to be pulled above VCC (up to 5.5V). Both share identical threshold accuracy, quiescent current, and pinout.

Can the LTC2934CTS8-2#TRMPBF monitor two different supply rails simultaneously?

Yes - the LTC2934CTS8-2#TRMPBF supports dual-rail monitoring via separate ADJ and PFI inputs. Each accepts a resistor divider from a distinct voltage rail (e.g., 3.3V system rail and 1.8V I/O rail), enabling independent reset and power-fail assertions. Figure 2 in the datasheet shows this dual-voltage configuration.

What is the minimum recommended decoupling capacitance for the LTC2934CTS8-2#TRMPBF VCC pin?

A 0.1μF ceramic capacitor placed between VCC and GND is recommended and used in all typical applications shown in the datasheet (e.g., TA01a, TA04). This value ensures stable operation during transient load events and suppresses high-frequency noise affecting comparator accuracy.

Does the LTC2934CTS8-2#TRMPBF require external resistors to set its reset and power-fail thresholds?

Yes - the LTC2934CTS8-2#TRMPBF does not have internal fixed thresholds. Reset threshold is set by a resistor divider on the ADJ pin, and power-fail threshold by a divider on the PFI pin. Both reference the internal 400mV comparator, so threshold voltages scale linearly with divider ratios (e.g., 2.55V reset = 2.55V × 0.4V / 2.55V = 0.4V at ADJ).