Analog Devices Inc. LTC2934CTS8-1#TRMPBF

Overview

LTC2934CTS8-1#TRMPBF from Analog Devices (acquired 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 open-drain RST/PFO outputs - designed for battery-powered portable equipment requiring early low-voltage warning and reliable system initialization.

For engineers reviewing the LTC2934CTS8-1#TRMPBF datasheet, LTC2934CTS8-1#TRMPBF pinout, LTC2934CTS8-1#TRMPBF application, or LTC2934CTS8-1#TRMPBF equivalent, key selection criteria include its 0.4V internal reference, 15ms/200ms selectable reset timeout, TSOT-23-8 package, –40°C to 85°C operating range, and compatibility with single- or dual-supply monitoring via external resistor dividers.

Technical Context

The LTC2934CTS8-1#TRMPBF integrates two precision comparators with independent 0.4V thresholds for ADJ (reset) and PFI (power-fail), each with programmable hysteresis (5% for ADJ, 2.5% for PFI). Its internal reset timer activates only after the ADJ input exceeds threshold by 5%, ensuring stable release of RST after supply stabilization.

RT pin selects between 15ms (RT = GND) or 200ms (RT = VCC) reset timeout; MR provides manual reset with 20μs minimum pulse width and internal 900kΩ pull-up; PFO asserts before full undervoltage collapse to enable controlled shutdown sequencing in microprocessor systems.

Key Specifications

Pinout & Package

Package: 8-Lead TSOT-23 (ThinSOT™), 2.9mm × 1.6mm footprint, lead-free, RoHS-compliant, exposed pad optional.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2935ITS8-1#TRMPBF and LTC2909ITS8#TRMPBF, the LTC2934CTS8-1#TRMPBF delivers optimal trade-off of ultra-low ICC, full adjustability, and compact size - making it preferred for cost-sensitive, space-constrained, single-rail battery applications where threshold precision matters more than pin-select convenience or multi-rail support.

Availability

LTC2934CTS8-1#TRMPBF is available at Aetrix Electronics and suitable for portable equipment, battery-powered equipment, and security systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for LTC2934CTS8-1#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, Inc. (ADI) acquired Linear Technology in 2017 and maintains its high-performance analog product lines, including precision supervisors, with global manufacturing and quality certification.

The LTC2934 series was designed specifically for ultra-low-power system supervision in portable and battery-critical applications, emphasizing nanoscale ICC, threshold accuracy over temperature, and minimal external component count.

FAQ

What is the operating temperature range for the LTC2934CTS8-1#TRMPBF?

The LTC2934CTS8-1#TRMPBF is rated for –40°C to 85°C ambient operation, matching the "I" grade specification per Linear Technology's ordering matrix. This makes it suitable for industrial and automotive cabin environments where thermal stability is critical. The device maintains ±1.5% threshold accuracy across this full range, verified in production testing.

Does the LTC2934CTS8-1#TRMPBF require external pull-up resistors on RST and PFO?

Yes - the LTC2934CTS8-1#TRMPBF features open-drain RST and PFO outputs, so external pull-up resistors are mandatory for proper logic-level definition. Recommended values range from 10kΩ to 470kΩ, with 100kΩ commonly used to balance speed, power, and noise immunity. Pull-up voltage may exceed VCC (up to 5.5V), enabling interface with higher-voltage logic domains.

How is the reset timeout period selected on the LTC2934CTS8-1#TRMPBF?

The reset timeout on the LTC2934CTS8-1#TRMPBF is selected via the RT pin: tie RT to GND for a 15ms timeout, or to VCC for a 200ms timeout. No external RC network is needed. The timeout begins only after the ADJ input rises above its 0.4V threshold plus 5% hysteresis, ensuring the monitored supply is stable before releasing RST.

Can the LTC2934CTS8-1#TRMPBF monitor two different supply voltages simultaneously?

Yes - the LTC2934CTS8-1#TRMPBF supports dual-voltage monitoring using separate resistor dividers on ADJ (for reset) and PFI (for power-fail), as shown in Figure 2 of the datasheet. Each input has independent 0.4V thresholds and low leakage (<1nA), enabling accurate tracking of dissimilar rails such as 3.3V I/O and 1.8V core without cross-coupling errors.

What is the maximum supply voltage the LTC2934CTS8-1#TRMPBF can tolerate on VCC?

The LTC2934CTS8-1#TRMPBF has an absolute maximum VCC rating of 6V, but its functional operating range is specified from 1.6V to 5.5V. Operating above 5.5V risks permanent damage, while operation below 1.6V may cause unpredictable comparator behavior or failure to assert RST/PFO. For robust design, maintain VCC within 1.6V–5.5V with 0.1μF local bypassing.