Analog Devices Inc. LTC2908CTS8-C1#TRPBF

Overview

LTC2908CTS8-C1#TRPBF from Analog Devices (formerly Linear Technology) is a precision six-input supply monitor IC designed for multivoltage systems requiring tight threshold accuracy and ultralow-voltage reset capability. It monitors V1 plus five adjustable inputs (VADJ1–VADJ5) with ±1.5% threshold accuracy over temperature, 200ms reset timeout, and guaranteed RST pull-down operation down to VCC = 0.5V. It is used in desktop computers and optical networking systems where reliable power sequencing and brownout detection are critical.

For engineers reviewing the LTC2908CTS8-C1#TRPBF datasheet, LTC2908CTS8-C1#TRPBF pinout, LTC2908CTS8-C1#TRPBF application, or LTC2908CTS8-C1#TRPBF equivalent, key selection considerations include its fixed 2.5V nominal reference for all five ADJ inputs, TSOT-23-8 package footprint, open-drain RST output with internal 6μA pull-up, and guaranteed operation across 0°C to 70°C ambient.

Technical Context

The LTC2908CTS8-C1#TRPBF implements six independent comparators against a bandgap reference, each with built-in glitch immunity via first-order low-pass filtering at the comparator output. Its internal reset pulse generator enforces a 200ms delay after all inputs exceed thresholds before releasing RST.

V1 serves exclusively as the internal supply voltage (VCC), eliminating dual-supply dependency seen in A1/B1 variants. All five adjustable inputs (VADJ1–VADJ5) share a common 0.5V threshold reference, enabling consistent monitoring of diverse rail voltages using external resistor dividers.

Key Specifications

Pinout & Package

Package: 8-lead plastic TSOT-23 (ThinSOT™), 3mm × 1.75mm body, 1mm max height, exposed pad optional (not electrically connected in TSOT-23).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G33DBVR and MAX6816EUT+T, the LTC2908CTS8-C1#TRPBF uniquely provides five independently adjustable inputs referenced to 0.5V, enabling precise monitoring of arbitrary rail voltages from 0.6V to 12V using standard 1% resistors - a capability absent in both alternatives.

Availability

LTC2908CTS8-C1#TRPBF is available at Aetrix Electronics and suitable for desktop computers, optical networking systems, and network servers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for LTC2908CTS8-C1#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 full product support, documentation, and manufacturing continuity for the LTC portfolio.

The LTC2908 series belongs to Linear's precision power monitoring product line, engineered specifically for high-reliability multivoltage systems where threshold accuracy, ultralow-voltage operation, and noise immunity are mandatory design requirements.

FAQ

What is the function of V1 in the LTC2908CTS8-C1#TRPBF?

V1 serves as both the primary monitored input and the sole internal supply voltage (VCC) for the LTC2908CTS8-C1#TRPBF. Unlike A1/B1 variants, V2 is not present in the C1 configuration; V1 must be ≥0.5V to guarantee correct RST logic state. It draws 22μA typical quiescent current and requires a ≥0.1μF ceramic bypass capacitor to GND for stable operation.

How many adjustable inputs does the LTC2908CTS8-C1#TRPBF support?

The LTC2908CTS8-C1#TRPBF supports five adjustable inputs: VADJ1 through VADJ5. Each is compared against a common 0.5V internal reference with ±1.5% accuracy over temperature. Input current is limited to ±15nA, minimizing loading error on external resistor dividers used to scale higher rail voltages.

What is the reset timeout duration of the LTC2908CTS8-C1#TRPBF?

The LTC2908CTS8-C1#TRPBF features a nominal 200ms reset timeout period. After all six inputs (V1 + VADJ1–VADJ5) rise above their respective thresholds, the internal timer begins counting; RST releases only after this full 200ms interval elapses with no further undervoltage events detected.

Does the LTC2908CTS8-C1#TRPBF require external timing components?

No, the LTC2908CTS8-C1#TRPBF does not require external timing components. Its 200ms reset timeout is generated by an internal capacitor, eliminating the need for external RC networks, reducing BOM count, and removing timing tolerance dependencies from the PCB layout.

What package type is used for the LTC2908CTS8-C1#TRPBF?

The LTC2908CTS8-C1#TRPBF uses an 8-lead plastic TSOT-23 (ThinSOT™) package measuring 3mm × 1.75mm with a maximum height of 1mm. This low-profile, surface-mount package is optimized for space-constrained applications and supports standard reflow soldering processes.