Analog Devices Inc. LTC2906CTS8#TRPBF

Overview

LTC2906CTS8#TRPBF from Analog Devices (formerly Linear Technology) is a precision dual supply monitor IC with one pin-selectable threshold input (5V/3.3V/2.5V) and one adjustable 0.5V input, designed for reliable power-up/power-down/brownout detection in space-constrained systems. It features ±1.5% threshold accuracy over temperature, 200ms fixed reset delay, open-drain RST output, and guaranteed operation down to V₁ ≥ 1V or V_CC ≥ 1V. Used in desktop computers, network servers, and handheld devices for core/I/O voltage supervision.

For engineers reviewing the LTC2906CTS8#TRPBF datasheet, LTC2906CTS8#TRPBF pinout, LTC2906CTS8#TRPBF application, or LTC2906CTS8#TRPBF equivalent, key selection criteria include its fixed 200ms reset timeout, TSOT-23-8 package, dual-threshold architecture with tolerance programming (5%/7.5%/10%), low 100µA V_CC supply current, and guaranteed RST assertion at V_MAX = 1V.

Technical Context

The LTC2906CTS8#TRPBF integrates two independent comparators-one with programmable thresholds via S1/TOL three-state inputs, and one with a fixed 0.5V nominal threshold-feeding a shared 200ms reset pulse generator. Its internal V_MAX logic selects the higher of V₁ or V_CC as the supply for RST drive circuitry, enabling reset assertion during brownout even when only one rail remains above 1V.

It employs comparator integration filtering and fixed timing delay to reject supply noise without sacrificing threshold accuracy, eliminating need for external hysteresis. The open-drain RST output supports wired-OR configurations and interfaces directly with microprocessor reset inputs requiring active-low assertion.

Key Specifications

Pinout & Package

Package: 8-lead TSOT-23 (Thin Small Outline Transistor), 2.9mm × 1.6mm × 1.0mm profile, exposed pad not present (unlike DFN variant).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply monitoring applications.

Compared with LTC2907CTS8#TRPBF, LTC2906CTS8#TRPBF eliminates capacitor dependency for timing but sacrifices adjustability; versus TPS3808G33DBVR, it provides true dual-rail supervision with programmable thresholds-enabling fewer components and higher system-level reliability in multi-voltage designs.

Availability

LTC2906CTS8#TRPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and handheld devices requiring stable component supply with guaranteed long-term availability and consistent parametric performance.

Supply support for LTC2906CTS8#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 precision analog product lines, including high-accuracy power monitoring ICs used in mission-critical infrastructure.

The LTC2906CTS8#TRPBF belongs to Linear's LTC290x dual-supply monitor family, engineered specifically for systems demanding simultaneous multi-rail supervision with minimal board area and uncompromised threshold accuracy.

FAQ

What is the operating temperature range for the LTC2906CTS8#TRPBF?

The LTC2906CTS8#TRPBF is rated for 0°C to 70°C ambient operation (C-grade). This range covers commercial applications including desktop PCs, consumer networking gear, and portable electronics where extended industrial temperature is not required. The part's ±1.5% threshold accuracy is guaranteed across this full range without derating.

Does the LTC2906CTS8#TRPBF require external components to set its reset thresholds?

No, the LTC2906CTS8#TRPBF does not require external resistors to set its primary thresholds. The V₁ nominal voltage (5V/3.3V/2.5V) is selected via the S1 pin connection (GND/open/V₁), and tolerance (5%/7.5%/10%) is set via TOL pin-both are three-state inputs. Only the V_ADJ input requires an external resistor divider to scale higher voltages down to its 0.5V trip point.

Can the LTC2906CTS8#TRPBF monitor a 1.2V supply?

Yes, the LTC2906CTS8#TRPBF can monitor a 1.2V supply using its V_ADJ input. By configuring a resistor divider (e.g., R1 = 182kΩ, R2 = 100kΩ per Table 2 in the datasheet), the 1.2V rail is scaled to 0.5V at V_ADJ. The ±1.5% accuracy applies to the 0.5V reference, translating to ±18mV absolute error at the 1.2V rail-enabling precise low-voltage supervision.

What is the minimum supply voltage required for the LTC2906CTS8#TRPBF to assert a valid reset signal?

The LTC2906CTS8#TRPBF guarantees correct RST output state (low) when either V₁ ≥ 1V or V_CC ≥ 1V. This means the device can assert a valid reset even during deep brownout conditions, as long as at least one monitored rail or auxiliary supply remains above 1V-ensuring fail-safe behavior in multi-rail systems.

Is the LTC2906CTS8#TRPBF pin-compatible with the LTC2906IDDB#TRPBF?

No, the LTC2906CTS8#TRPBF (TSOT-23-8) is not pin-compatible with the LTC2906IDDB#TRPBF (DFN-8, 3mm × 2mm). While both share identical functionality and electrical pin definitions, their physical pinouts differ: TSOT-23 uses a linear 1–8 pin arrangement with GND at Pin 4, whereas DFN places GND at Pins 4 and 9 (exposed pad). PCB layout and solder stencil must be redesigned for package interchange.