Analog Devices Inc. LTC2935IDC-1#TRPBF

Overview

LTC2935IDC-1#TRPBF from Analog Devices (formerly Linear Technology) is an ultra-low power voltage supervisor IC with pin-selectable reset and power-fail thresholds, open-drain RST and PFO outputs, and 500nA typical quiescent current. It monitors VCC for system initialization and controlled shutdown in battery-powered systems, providing a 200ms reset timeout and ±1.5% threshold accuracy over –40°C to 85°C.

For engineers reviewing the LTC2935IDC-1#TRPBF datasheet, LTC2935IDC-1#TRPBF pinout, LTC2935IDC-1#TRPBF application, or LTC2935IDC-1#TRPBF equivalent, key selection criteria include its 8-pin DFN (2mm × 2mm) package, eight binary-configurable reset thresholds (e.g., 2.25V–2.40V for -1 variant), early-warning power-fail output, manual reset input, and guaranteed operation across industrial temperature range.

Technical Context

The LTC2935IDC-1#TRPBF implements dual independent comparators: one for reset generation (VRTF) and one for power-fail warning (VPFT), with VPFT fixed 120mV above VRTF for the -3/-4 variants and 150mV above for -1/-2 variants - this part is -1, so ΔVPFT = 150mV. Its internal precision attenuators and hysteresis (5% on RST, 2.5% on PFO) eliminate external components for noise immunity.

It uses three binary inputs (S2/S1/S0) to select one of eight falling reset thresholds between 2.25V and 3.30V, and corresponding power-fail thresholds 150mV higher. The MR input triggers a 200ms reset pulse upon release, and both RST and PFO are open-drain with <100mV VOL at 3mA pull-up, supporting level-shifting up to 5.5V.

Key Specifications

Pinout & Package

Package: 8-lead, 2mm × 2mm plastic DFN (DC package) with exposed pad (optional GND connection). Pin 1 marked by notch or bar; pinout matches LTC2935-1 functional variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2935ITS8-1#TRPBF, the LTC2935IDC-1#TRPBF offers lower thermal resistance and better power dissipation in dense layouts; compared with LTC2934IDC-1#TRPBF, it eliminates external components and simplifies BOM while trading off threshold flexibility for ease of use.

Availability

LTC2935IDC-1#TRPBF is available at Aetrix Electronics and suitable for battery-powered equipment, wireless sensor nodes, and point-of-sale terminals requiring stable component supply, long-term lifecycle support, and industrial-grade reliability.

Supply support for LTC2935IDC-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-performance analog and power management product lines with rigorous qualification and long-term support.

The LTC2935IDC-1#TRPBF belongs to Linear's ultra-low-power supervisor family, designed specifically for energy-constrained applications where battery life, small size, and deterministic voltage monitoring are critical - such as portable medical devices, IoT edge nodes, and backup power systems.

FAQ

What is the reset threshold range for LTC2935IDC-1#TRPBF?

The LTC2935IDC-1#TRPBF supports eight discrete reset thresholds from 2.25V to 3.30V, selected via S2/S1/S0 pins. For example, S2=High, S1=High, S0=High yields 2.25V, while S2=Low, S1=Low, S0=Low yields 3.30V. Each threshold has a corresponding power-fail threshold 150mV higher, as confirmed in the Falling Threshold Selection Table for LTC2935-1 variants.

Does LTC2935IDC-1#TRPBF require external components for basic operation?

No, the LTC2935IDC-1#TRPBF requires only a 0.1μF decoupling capacitor on VCC for stable operation. All thresholds, hysteresis, and timing (200ms reset timeout) are internal. External pull-up resistors are needed for RST and PFO since they are open-drain, but no resistors are required for threshold setting or reset timing - unlike adjustable supervisors such as LTC2934IDC-1#TRPBF.

How does the manual reset (MR) function work on LTC2935IDC-1#TRPBF?

When MR is pulled low (e.g., via pushbutton to GND), RST immediately goes low. After MR returns high, RST remains low for a guaranteed 200ms timeout before releasing high. The MR pin has an internal 900kΩ pull-up to VCC, so it can be left unconnected if unused. This behavior is identical across all LTC2935-1 variants, including the LTC2935IDC-1#TRPBF.

What is the maximum allowable VCC voltage for LTC2935IDC-1#TRPBF?

The absolute maximum VCC voltage for LTC2935IDC-1#TRPBF is 6V, but the recommended operating range is up to 5.5V per Electrical Characteristics. Operation beyond 5.5V risks violating parametric limits and is not guaranteed. This rating applies to both supply input and monitored rail, and is consistent across all DFN-packaged LTC2935-1 variants.

Is LTC2935IDC-1#TRPBF pin-compatible with other LTC2935 variants?

Yes, all LTC2935 variants - including LTC2935IDC-1#TRPBF, LTC2935IDC-2#TRPBF, and LTC2935ITS8-1#TRPBF - share identical pinouts and package footprints (DFN-8 or TSOT-23-8). The suffix (-1, -2, -3, -4) denotes output type (open-drain vs active pull-up) and threshold family, not pin assignment. Thus, LTC2935IDC-1#TRPBF can be substituted for other -1 variants without layout changes.