Analog Devices Inc. LTC2934CDC-1#TRMPBF

Overview

LTC2934CDC-1#TRMPBF from Analog Devices (formerly Linear Technology) is an ultra-low power, adjustable voltage supervisor IC with independent power-fail and reset monitoring 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 LTC2934CDC-1#TRMPBF datasheet, LTC2934CDC-1#TRMPBF pinout, LTC2934CDC-1#TRMPBF application, or LTC2934CDC-1#TRMPBF equivalent, key selection criteria include its 0.4V internal reference, 15ms/200ms selectable reset timeout, 1.6V minimum operating supply, –40°C to 85°C industrial-grade variant compatibility, and DFN-8 (2mm × 2mm) package footprint.

Technical Context

The LTC2934CDC-1#TRMPBF integrates two independent comparators: one monitors the ADJ input for reset generation (threshold = 0.4V ±6mV), the other monitors PFI for power-fail detection (same 0.4V threshold). Each comparator features built-in hysteresis - 5% on ADJ (20mV typ) and 2.5% on PFI (10mV typ) - ensuring noise immunity during voltage transients.

Its RT pin selects between two fixed reset timeout periods (15ms or 200ms) via logic-level input, while MR provides manual reset with 20μs minimum pulse width and internal 900kΩ pull-up. Outputs RST and PFO are open-drain (LTC2934-1 variant), supporting flexible pull-up voltages up to 5.5V independent of VCC.

Key Specifications

Pinout & Package

Package: 8-Lead (2mm × 2mm) Plastic DFN (DC package), exposed pad optional for thermal enhancement or GND connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2935CTS8-1#TRMPBF and LTC2909CMS8-1#TRMPBF, the LTC2934CDC-1#TRMPBF delivers optimal trade-off of sub-μA quiescent current, fully analog-adjustable thresholds, and minimal external component count - making it the preferred choice for cost-sensitive, battery-constrained portable designs.

Availability

LTC2934CDC-1#TRMPBF is available at Aetrix Electronics and suitable for portable equipment, battery-powered security systems, and point-of-sale devices requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for LTC2934CDC-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 acquired Linear Technology in 2017 and maintains its precision analog portfolio, including ultra-low-power supervisors, with global manufacturing, testing, and quality assurance infrastructure.

The LTC2934 product line was designed specifically for battery-critical applications demanding nanopower operation, accurate dual-threshold supervision, and compact packaging - targeting portable, wireless, and energy-harvesting systems.

FAQ

What is the minimum supply voltage required for LTC2934CDC-1#TRMPBF to operate correctly?

The LTC2934CDC-1#TRMPBF operates down to 1.6V supply voltage while maintaining full functionality, including accurate 0.4V threshold comparison, 500nA quiescent current, and open-drain output drive capability. Below 1.6V, internal circuitry may not bias correctly, and reset/power-fail assertions become unreliable - verified per Absolute Maximum Ratings and Electrical Characteristics tables in the official datasheet.

How does the RT pin select the reset timeout period on LTC2934CDC-1#TRMPBF?

The RT pin on LTC2934CDC-1#TRMPBF selects between two fixed reset timeout periods: connecting RT to GND configures a 15ms delay, while connecting RT to VCC selects 200ms. This logic-level selection is internally decoded without external timing components, and the timeout begins only after the ADJ input rises above 0.4V + 5% hysteresis - confirmed in the Timing Diagram and Applications Information sections.

Can LTC2934CDC-1#TRMPBF monitor two different supply rails simultaneously?

Yes - LTC2934CDC-1#TRMPBF can supervise two independent rails using separate resistive dividers on ADJ and PFI inputs. Figure 2 in the datasheet shows dual-voltage monitoring with four resistors; each input has <1nA leakage, enabling high-impedance dividers that avoid cross-loading. The resulting RST and PFO outputs respond independently to their respective thresholds.

What is the maximum allowable pull-up voltage on the open-drain RST and PFO pins of LTC2934CDC-1#TRMPBF?

The open-drain RST and PFO outputs of LTC2934CDC-1#TRMPBF support pull-up voltages up to 5.5V, regardless of VCC level - a key advantage over competitors with internal diode clamps. This allows interfacing with higher-voltage logic (e.g., 5V microcontrollers) while operating from a 1.8V supply, as specified in Absolute Maximum Ratings and confirmed in Typical Performance Characteristics (Figure G05).

Is the exposed pad on the LTC2934CDC-1#TRMPBF DFN package required to be connected to ground?

No - the exposed pad on the LTC2934CDC-1#TRMPBF DFN package is optional for grounding. Per the DC Package drawing and Applications Information, it may be left floating or connected to PCB GND to improve thermal performance or reduce noise coupling; no electrical functionality depends on this connection, and soldering it to GND does not affect threshold accuracy or timing behavior.