Analog Devices Inc. LTC2908CTS8-A1#TRPBF

Overview

LTC2908CTS8-A1#TRPBF from Analog Devices (formerly Linear Technology) is a precision six-input supply voltage supervisor IC designed for multivoltage system power sequencing and brownout detection. It monitors 5V, 3.3V, 2.5V, 1.8V, and two adjustable inputs (VADJ1/VADJ2) with ±1.5% threshold accuracy over temperature, features a 200ms reset timeout, and delivers active-low open-drain RST output. It is deployed in network servers and optical networking systems requiring reliable, compact, micropower supply monitoring.

For engineers reviewing the LTC2908CTS8-A1#TRPBF datasheet, LTC2908CTS8-A1#TRPBF pinout, LTC2908CTS8-A1#TRPBF application, or LTC2908CTS8-A1#TRPBF equivalent, this page provides verified technical context, exact pin functions, real-world application mappings, and validated alternative parts - all grounded in the official LTC2908 datasheet (Rev. D) and Analog Devices product documentation.

Technical Context

The LTC2908CTS8-A1#TRPBF implements six independent high-accuracy comparators with internal bandgap reference and glitch-immune timing logic. Its V1/V2 inputs serve dual roles: monitored voltages and internal VCC source (whichever is greater), enabling operation down to 0.5V while guaranteeing RST low-state integrity.

It uses an integrated 200ms reset timer and first-order comparator filtering to suppress noise-induced false resets without hysteresis penalty. The RST output combines a strong pull-down (40Ω typical) and weak internal 6μA pull-up to VCC, supporting wired-OR configurations and external pull-up flexibility for faster rise times.

Key Specifications

Pinout & Package

Package: 8-lead plastic TSOT-23 (ThinSOT™), 3mm × 1.75mm footprint, 1mm profile, 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 MAX6326US31D3+T and TPS3808G33DBVR, the LTC2908CTS8-A1#TRPBF uniquely integrates six precise, independently configurable monitors in one TSOT-23 package - reducing board area, eliminating timing component variation, and enabling coordinated reset across heterogeneous power domains.

Availability

LTC2908CTS8-A1#TRPBF is available at Aetrix Electronics and suitable for network servers, optical networking systems, and multivoltage computing platforms requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for LTC2908CTS8-A1#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC2908CTS8-A1#TRPBF belongs to the LTC® precision supervisor family, engineered specifically for high-density, multirail systems in telecom infrastructure, enterprise computing, and industrial control where accuracy, noise immunity, and space efficiency are critical.

FAQ

What is the operating temperature range for the LTC2908CTS8-A1#TRPBF?

The LTC2908CTS8-A1#TRPBF is specified for commercial temperature operation from 0°C to 70°C. This grade is optimized for indoor, controlled-environment applications such as desktop computers, network switches, and optical transceivers where ambient thermal stress is limited. It is not rated for extended industrial or automotive temperature ranges.

How does the LTC2908CTS8-A1#TRPBF select its internal supply voltage (VCC)?

The LTC2908CTS8-A1#TRPBF automatically selects VCC as the greater of the V1 and V2 input voltages. When V1 ≥ V2, V1 powers internal circuitry; when V2 > V1, V2 becomes VCC. This dual-source architecture ensures operation even if one monitored rail fails, and guarantees RST functionality down to 0.5V on either pin.

Can the LTC2908CTS8-A1#TRPBF monitor fewer than six supplies?

Yes. Unused inputs (e.g., V3, V4, VADJ1, VADJ2) should be tied to the nearest higher available supply voltage - for example, connect unneeded VADJ2 to 3.3V if monitoring only 5V, 3.3V, and 2.5V rails. This prevents floating inputs and maintains comparator stability without affecting threshold accuracy of active channels.

What is the maximum voltage allowed on the V1, V2, V3, and V4 pins of the LTC2908CTS8-A1#TRPBF?

The absolute maximum voltage on V1, V2, V3, and V4 is 7V. However, the recommended operating range is up to 6V per the datasheet's terminal voltage rating. Exceeding 6V risks long-term reliability degradation, especially under temperature cycling, and violates the specified operating conditions for threshold accuracy and input current performance.

Does the LTC2908CTS8-A1#TRPBF require external components for basic operation?

Yes - two 0.1μF ceramic bypass capacitors are mandatory: one on V1 and one on V2. These stabilize the internal VCC derived from whichever input is higher. No external timing capacitor is needed due to the integrated 200ms reset timer, and no pull-up resistor is required for RST (though one may be added for faster rise time).