Analog Devices Inc. LTC2934IDC-1#TRMPBF

Overview

LTC2934IDC-1#TRMPBF 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 LTC2934IDC-1#TRMPBF datasheet, LTC2934IDC-1#TRMPBF pinout, LTC2934IDC-1#TRMPBF application, or LTC2934IDC-1#TRMPBF equivalent, key selection criteria include its –40°C to 85°C industrial temperature grade, 8-lead 2mm × 2mm DFN package, 0.4V internal comparator threshold, selectable 15ms/200ms reset timeout, and dual adjustable thresholds (ADJ for reset, PFI for power-fail).

Technical Context

The LTC2934IDC-1#TRMPBF integrates two precision comparators with independent hysteresis (5% on ADJ, 2.5% on PFI), a programmable reset timer controlled by the RT pin (GND = 15ms, VCC = 200ms), and manual reset logic with 20μs minimum pulse width detection. Its 0.4V reference-based architecture enables externally adjustable falling thresholds via resistive dividers on ADJ and PFI inputs.

As an open-drain variant (LTC2934-1), both RST and PFO outputs support pull-up to voltages up to 5.5V - independent of VCC - enabling interface with higher-voltage logic domains. The device operates down to 1.6V supply and draws only 225–1000nA across its full temperature range.

Key Specifications

Pinout & Package

Package: 8-lead, 2mm × 2mm plastic DFN (DC package) with exposed pad (optional GND connection); RoHS-compliant, lead-free finish; rated for –40°C to 85°C ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2935IDC-1#TRMPBF and LTC2909IDC-1#TRMPBF, the LTC2934IDC-1#TRMPBF delivers optimal trade-off of ultra-low power, full threshold adjustability, and minimal external component count for single-supply battery monitoring - making it ideal where design flexibility and multi-year runtime are primary constraints.

Availability

LTC2934IDC-1#TRMPBF is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered security alarms, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LTC2934IDC-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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2934 product line was designed specifically for ultra-low-power, precision voltage supervision in battery-critical applications - emphasizing nanoscale quiescent current, wide supply range, and robust hysteresis without sacrificing accuracy or configurability.

FAQ

What is the operating temperature range of the LTC2934IDC-1#TRMPBF?

The LTC2934IDC-1#TRMPBF is rated for industrial operation from –40°C to +85°C ambient temperature. This range is confirmed in the Absolute Maximum Ratings table and Order Information section of the datasheet, and applies to all DC-package variants with 'I' grade marking (e.g., LDKT top mark). It is not rated for extended automotive or military temperature ranges.

How does the LTC2934IDC-1#TRMPBF differ from the LTC2934ITS8-1#TRMPBF?

The LTC2934IDC-1#TRMPBF uses an 8-lead 2mm × 2mm plastic DFN package, while the LTC2934ITS8-1#TRMPBF uses an 8-lead TSOT-23 package. Both share identical electrical specifications, –40°C to 85°C rating, and open-drain output configuration. The DFN offers lower thermal resistance (θJA = 102°C/W vs. 195°C/W) and smaller footprint area, but requires different PCB layout and reflow profile.

Can the LTC2934IDC-1#TRMPBF monitor two different supply rails simultaneously?

Yes - the LTC2934IDC-1#TRMPBF can supervise two independent voltages by connecting separate resistive dividers to the ADJ and PFI inputs. Figure 2 in the Applications Information section shows dual-voltage monitoring with V1 and V2. Each input has its own 0.4V threshold and hysteresis, allowing distinct reset and power-fail events per rail.

What is the maximum allowable pull-up voltage on the RST and PFO pins of the LTC2934IDC-1#TRMPBF?

The RST and PFO pins of the LTC2934IDC-1#TRMPBF support pull-up voltages up to 5.5V, independent of VCC. This is specified in the Absolute Maximum Ratings table under "PFO, RST (LTC2934-1)" and enables interfacing with higher-voltage logic families (e.g., 5V TTL) even when VCC is 1.8V or 2.5V - a key advantage over many competing supervisors with VCC-clamped outputs.

Is the exposed pad on the LTC2934IDC-1#TRMPBF's DFN package required to be connected to ground?

No - the exposed pad on the LTC2934IDC-1#TRMPBF's DFN package is optional for grounding. The datasheet states "Exposed Pad (DFN Only): Exposed Pad may be left floating or connected to device ground." Connecting it to GND improves thermal performance (reducing θJA), but is not electrically necessary for functional operation or ESD robustness.