Analog Devices Inc. LTC2934ITS8-1#TRPBF

Overview

LTC2934ITS8-1#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 15ms/200ms selectable reset timeout - designed for battery-powered portable equipment requiring early low-voltage warning and reliable system initialization.

For engineers reviewing the LTC2934ITS8-1#TRPBF datasheet, LTC2934ITS8-1#TRPBF pinout, LTC2934ITS8-1#TRPBF application, or LTC2934ITS8-1#TRPBF equivalent, key selection criteria include its open-drain PFO/RST outputs, –40°C to 85°C industrial temperature grade, TSOT-23-8 package, 0.4V internal comparator threshold, and configurable ADJ/PFI resistive divider interface for custom reset and power-fail thresholds.

Technical Context

The LTC2934ITS8-1#TRPBF integrates two independent comparators: one monitoring the ADJ input for reset generation (with 5% hysteresis on rising edge), and another monitoring PFI for power-fail detection (with 2.5% hysteresis). Its internal 0.4V reference enables precise threshold setting via external resistor dividers across monitored supply rails.

It features a manual reset input (MR) with internal 900kΩ pull-up, RT pin for selecting 15ms or 200ms reset timeout after threshold recovery, and operates down to 1.6V VCC while maintaining 500nA ICC. Outputs RST and PFO are open-drain, compatible with pull-up voltages up to 5.5V - independent of VCC.

Key Specifications

Pinout & Package

Package: 8-Lead TSOT-23 (ThinSOT™), 2.9mm × 1.6mm footprint, –40°C to 85°C operating range, exposed pad optional for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2935ITS8-1#TRPBF and LTC2909ITS8-1#TRPBF, the LTC2934ITS8-1#TRPBF delivers optimal trade-off of ultra-low power, compact TSOT-23-8 size, and independent dual-threshold configurability - making it the preferred choice for cost-sensitive, space-constrained, single-rail battery supervision.

Availability

LTC2934ITS8-1#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered security alarms, and point-of-sale handheld terminals requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial temperature performance.

Supply support for LTC2934ITS8-1#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-reliability analog IC portfolio, emphasizing precision, low power, and robustness for industrial and medical applications.

The LTC2934 series belongs to Linear's ultralow-power supervisor product line, engineered specifically for battery-critical systems where extended operational life, accurate voltage monitoring, and fail-safe reset behavior are non-negotiable design requirements.

FAQ

What is the minimum VCC voltage required for LTC2934ITS8-1#TRPBF to operate correctly?

The LTC2934ITS8-1#TRPBF operates down to 1.6V VCC while maintaining full functionality, including accurate 0.4V threshold comparison, 500nA quiescent current, and open-drain output drive. Below 1.6V, internal circuitry may not bias correctly, and RST/PFO behavior is not guaranteed per datasheet specifications.

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

The LTC2934ITS8-1#TRPBF features open-drain RST and PFO outputs, requiring external pull-up resistors and supporting pull-up voltages up to 5.5V - independent of VCC. In contrast, the LTC2934ITS8-2#TRPBF uses active pull-up outputs tied to VCC, eliminating external resistors but limiting output high voltage to VCC.

Can the LTC2934ITS8-1#TRPBF monitor two different supply rails simultaneously?

Yes - the LTC2934ITS8-1#TRPBF supports dual-rail monitoring using separate resistor dividers on ADJ (for reset) and PFI (for power-fail) inputs. Each input references the same 0.4V internal threshold, allowing independent falling thresholds (e.g., 2.5V reset, 2.7V warning) on distinct supplies like VDD_IO and VDD_CORE.

What is the purpose of the RT pin on the LTC2934ITS8-1#TRPBF?

The RT pin on the LTC2934ITS8-1#TRPBF selects the reset timeout duration: tied to GND for 15ms, or to VCC for 200ms. This internal timer delays RST release after ADJ rises above threshold +5% hysteresis, ensuring stable power before MCU release - no external capacitor or resistor needed.

Is the LTC2934ITS8-1#TRPBF RoHS-compliant and lead-free?

Yes - the LTC2934ITS8-1#TRPBF carries the "#TRPBF" suffix, indicating lead-free (Pb-free), RoHS-compliant packaging with matte tin finish. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards.