Analog Devices Inc. LTC2914CDHC-1#TRPBF

Overview

LTC2914CDHC-1#TRPBF from Analog Devices (formerly Linear Technology) is a quad-input UV/OV supply monitor IC for simultaneous monitoring of four independent voltage rails-supporting both positive and negative supplies-with ±1.5% threshold accuracy over temperature, 62 µA quiescent current, and latching OV output. It serves in desktop/notebook computers and network servers as a space-constrained, micropower system supervisor for core/I/O voltage integrity.

For engineers reviewing the LTC2914CDHC-1#TRPBF datasheet, LTC2914CDHC-1#TRPBF pinout, LTC2914CDHC-1#TRPBF application, or LTC2914CDHC-1#TRPBF equivalent, key selection criteria include its 16-lead DFN (5mm × 3mm) package, adjustable reset timeout via external capacitor, buffered 1V reference, dual-polarity input capability via three-state SEL pin, and guaranteed operation down to VCC = 1V.

Technical Context

The LTC2914CDHC-1#TRPBF implements four independent comparator pairs (VHn/VLn), each sharing a common 0.5V internal threshold reference, with polarity programmable via SEL pin states (VCC/GND/open) to support up to two negative voltage monitors. Its UV and OV outputs are open-drain, with UV asserting low on any undervoltage condition and OV latching low on overvoltage (LTC2914-1 variant).

Timing is controlled by an external capacitor on TMR pin (9 ms/nF), enabling adjustable timeout periods from ~6 ms to >1 s; glitch rejection is achieved via internal low-pass filtering of comparator outputs, eliminating need for external hysteresis while maintaining ±1.5% threshold accuracy across 0°C to 70°C operating range.

Key Specifications

Pinout & Package

Package: 16-lead plastic DFN (5 mm × 3 mm), exposed pad (Pin 17), RoHS-compliant, operating temperature range 0°C to 70°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2915CDHC-1#TRPBF, the LTC2914CDHC-1#TRPBF offers lower cost and sufficient performance for commercial computing, while TPS3307-33DGNR lacks quad monitoring, polarity flexibility, and latching - making it unsuitable as a drop-in replacement but viable only for simplified 3-rail applications.

Availability

LTC2914CDHC-1#TRPBF is available at Aetrix Electronics and suitable for desktop computers, notebook systems, and network servers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LTC2914CDHC-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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC2914 belongs to Linear's precision power supervision product line, designed specifically for high-accuracy, low-power, multi-rail voltage monitoring in computing and communications infrastructure where reliability and space efficiency are critical.

FAQ

What is the operating temperature range for the LTC2914CDHC-1#TRPBF?

The LTC2914CDHC-1#TRPBF is rated for 0°C to 70°C ambient operation, as indicated by the "C" grade suffix and confirmed in the Absolute Maximum Ratings table. This makes it suitable for commercial computing applications including desktops, notebooks, and enterprise servers operating in controlled environments. The DFN package's thermal resistance (θJA = 43.5°C/W) ensures adequate self-heating margin within this range when properly mounted with exposed pad grounding.

How does the SEL pin configure polarity for negative voltage monitoring on the LTC2914CDHC-1#TRPBF?

The SEL pin on the LTC2914CDHC-1#TRPBF is a three-state input that configures polarity for VH3/VL3 and VH4/VL4 inputs: tied to GND sets both as negative monitors; tied to VCC sets both as positive; left open configures VH3/VL3 as positive and VH4/VL4 as negative. In negative mode, VHn triggers OV when voltage falls below 0.5 V (i.e., becomes more negative), and VLn triggers UV when voltage rises above 0.5 V (i.e., becomes less negative), using the internal 1 V REF as offset - enabling direct –5 V or –12 V rail supervision without external components.

Does the LTC2914CDHC-1#TRPBF support latching overvoltage detection?

Yes, the LTC2914CDHC-1#TRPBF implements latching OV behavior via the LATCH pin (Pin 13). When LATCH is pulled low, the OV output latches low upon first overvoltage detection and remains latched until LATCH is pulled high. This allows fault persistence for diagnostic logging or system-level fault handling. When LATCH is high, OV behaves identically to UV - asserting low during OV and releasing after the TMR-configured timeout - giving designers flexible reset response modes within a single device.

What is the minimum VCC voltage required for valid operation of the LTC2914CDHC-1#TRPBF?

The LTC2914CDHC-1#TRPBF guarantees functional UV and OV output behavior down to VCC = 1 V, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. At VCC ≥ 1 V, the UV output asserts low and OV pulls weakly to VCC; above 2 V, input comparators become fully active. This low-VCC capability ensures reliable reset signaling during brownout conditions and early power-up sequencing before main regulators stabilize - a key requirement for robust system initialization in computing platforms.

Can the LTC2914CDHC-1#TRPBF monitor both positive and negative voltages simultaneously?

Yes, the LTC2914CDHC-1#TRPBF can monitor up to two negative voltages simultaneously using its VH3/VL3 and VH4/VL4 inputs, configured via the SEL pin. With SEL = GND, both pairs operate in negative mode: VHn triggers OV when the negative rail becomes more negative than threshold, and VLn triggers UV when it becomes less negative. The internal buffered 1 V REF serves as the offset reference, eliminating need for external level-shifting circuitry. This capability is explicitly documented in the Pin Functions and Applications Information sections of the datasheet.