Analog Devices Inc. LTC2934CTS8-1#TRPBF

Overview

LTC2934CTS8-1#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 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#TRPBF datasheet, LTC2934CTS8-1#TRPBF pinout, LTC2934CTS8-1#TRPBF application, or LTC2934CTS8-1#TRPBF equivalent, key selection criteria include its 0.4V internal comparator threshold, selectable 15ms/200ms reset timeout via RT pin, TSOT-23-8 package compatibility, and operation down to 1.6V supply voltage.

Technical Context

The LTC2934CTS8-1#TRPBF integrates two precision comparators with independently configurable thresholds at ADJ (reset) and PFI (power-fail), both referenced to a stable 0.4V internal reference. Hysteresis is fixed at 5% for ADJ and 2.5% for PFI, ensuring noise immunity during voltage transients.

Its open-drain outputs (RST and PFO) support flexible pull-up voltages up to 5.5V - independent of VCC - enabling interfacing with higher-voltage logic domains. The MR input features an internal 900kΩ pull-up, and RT selects between 15ms or 200ms reset timeout after threshold recovery.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic TSOT-23 (2.9mm × 1.6mm × 0.85mm), RoHS-compliant, lead-free finish. 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 LTC2935CTS8-1#TRPBF and LTC2909CMS8#TRPBF, the LTC2934CTS8-1#TRPBF uniquely balances nanopower consumption, fully adjustable thresholds via external resistors, and hardware-selectable reset timeout - making it optimal for cost-sensitive, battery-constrained designs requiring tailored voltage supervision.

Availability

LTC2934CTS8-1#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered security alarms, and point-of-sale terminals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LTC2934CTS8-1#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC2934 belongs to Linear's ultralow-power supervisor product line, engineered specifically for energy-constrained battery-operated systems demanding precision, reliability, and minimal standby current.

FAQ

What is the maximum supply voltage rating for LTC2934CTS8-1#TRPBF?

The absolute maximum VCC rating for LTC2934CTS8-1#TRPBF is 6V, though recommended operating range is 1.6V to 5.5V. Exceeding 6V may cause permanent damage. This rating applies regardless of whether RST or PFO outputs are pulled up to voltages up to 5.5V - a key advantage of its open-drain architecture.

How does the LTC2934CTS8-1#TRPBF generate its reset timeout delay?

The LTC2934CTS8-1#TRPBF uses an internal timer that starts only after the ADJ input rises above the 0.4V threshold plus 5% hysteresis. The timeout duration - either 15ms or 200ms - is selected by the logic level on the RT pin (GND or VCC). No external capacitor is required, simplifying design and improving timing consistency across temperature.

Can LTC2934CTS8-1#TRPBF monitor two different supply rails simultaneously?

Yes - LTC2934CTS8-1#TRPBF can supervise two rails using separate resistive dividers on ADJ and PFI inputs. For example, ADJ may monitor a 3.3V logic rail for reset, while PFI monitors a 5V analog rail for early power-fail warning. Each input has independent 0.4V threshold and hysteresis, enabling true dual-rail supervision in one TSOT-23-8 device.

What is the purpose of the MR pin on LTC2934CTS8-1#TRPBF, and how is it used?

The MR (Manual Reset) pin on LTC2934CTS8-1#TRPBF allows external initiation of a system reset via pushbutton. Pulling MR low forces RST low immediately; RST remains low for the full selected timeout period (15ms or 200ms) after MR returns high. An internal 900kΩ pull-up eliminates need for external resistor unless leakage currents interfere.

Does LTC2934CTS8-1#TRPBF require external passive components for basic operation?

LTC2934CTS8-1#TRPBF requires only a 0.1μF VCC bypass capacitor for stable operation. Resistive dividers on ADJ and PFI are optional but necessary to set custom thresholds; if unused, those pins should be tied to VCC. No timing capacitors, pull-ups for RST/PFO (open-drain), or additional filtering is mandatory - enabling minimal BOM count.