Analog Devices Inc. LTC2914IDHC-1#TRPBF

Overview

LTC2914IDHC-1#TRPBF from Analog Devices (formerly Linear Technology) is a quad-input, latching overvoltage/undervoltage supervisor IC designed for simultaneous monitoring of four independent supply rails in high-reliability systems. It delivers ±1.5% threshold accuracy over temperature, 62µA quiescent current, adjustable reset timeout via external capacitor, and supports both positive and negative voltage monitoring using its buffered 1V reference and three-state polarity-select (SEL) pin. It is deployed in desktop/notebook computers and network servers for core and I/O rail supervision.

For engineers reviewing the LTC2914IDHC-1#TRPBF datasheet, LTC2914IDHC-1#TRPBF pinout, LTC2914IDHC-1#TRPBF application, or LTC2914IDHC-1#TRPBF equivalent, key selection considerations include its latching OV output (LTC2914-1 variant), guaranteed operation down to VCC = 1V, input glitch rejection, dual-polarity capability, and DFN-16 (5mm × 3mm) package with exposed thermal pad.

Technical Context

The LTC2914IDHC-1#TRPBF implements four independent comparator pairs (VHn/VLn), each comparing input-derived voltages against a precise 500mV internal threshold. Its three-state SEL pin configures polarity for inputs 3 and 4, enabling monitoring of up to two negative supplies without external components. The LATCH pin provides hardware-controlled latching of the OV output - low to latch, high to clear - distinguishing it from the non-latching LTC2914-2 variant.

Threshold detection triggers open-drain UV and OV outputs with internal weak pull-ups to VCC and strong active-low sink drivers. A programmable timeout (via TMR pin capacitor) holds outputs asserted after fault clearance, ensuring minimum reset pulse width. Input glitch rejection is achieved via integrated low-pass filtering on each comparator output, eliminating need for external hysteresis while preserving ±1.5% accuracy.

Key Specifications

Pinout & Package

Package: 16-lead plastic DFN (5mm × 3mm), exposed thermal pad (Pin 17), RoHS-compliant, rated for –40°C to +85°C operating temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3307-18-33-30-Q1 and MAX6805US29D3+T, the LTC2914IDHC-1#TRPBF uniquely delivers quad-rail monitoring with latching OV, negative rail capability, and ±1.5% accuracy-making it irreplaceable in high-density computing and industrial control where rail count, fault retention, and bipolar support are mandatory.

Availability

LTC2914IDHC-1#TRPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial embedded controllers requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LTC2914IDHC-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, serving precision instrumentation, communications, and power management markets.

The LTC2914 product line was engineered specifically for high-accuracy, low-power, multi-rail voltage supervision in computing and enterprise infrastructure-prioritizing threshold stability, noise immunity, and compact footprint without sacrificing configurability.

FAQ

What is the operating temperature range for the LTC2914IDHC-1#TRPBF?

The LTC2914IDHC-1#TRPBF is specified for operation from –40°C to +85°C (Industrial grade). This is confirmed by the "I" suffix in the part number and the order information table listing "–40°C to 85°C" for all IDHC-1 variants. The DFN package's thermal characteristics (θJA = 43.5°C/W) support reliable operation within this range under typical PCB copper pour conditions.

Does the LTC2914IDHC-1#TRPBF support monitoring negative supply voltages?

Yes, the LTC2914IDHC-1#TRPBF supports monitoring negative supplies using its buffered 1V REF output and three-state SEL pin. When SEL is grounded, VH3/VL3 and VH4/VL4 are configured for negative monitoring: VHn triggers OV when below 0.5V, and VLn triggers UV when above 0.5V. This enables accurate supervision of rails like –5V or –12V using standard resistor dividers referenced to REF.

How does the LATCH pin function on the LTC2914IDHC-1#TRPBF?

The LATCH pin (Pin 13) enables hardware-controlled latching of the OV output. When pulled low, the OV pin latches low upon any overvoltage fault and remains latched until LATCH is raised high. When held high, OV behaves identically to UV - asserting low on fault and releasing after the timeout period expires if all inputs recover. This behavior defines the LTC2914-1 variant, distinguishing it from the LTC2914-2 disable function.

What is the minimum VCC voltage required for the LTC2914IDHC-1#TRPBF to assert valid UV/OV outputs?

The LTC2914IDHC-1#TRPBF guarantees valid UV and OV output operation down to VCC = 1V. At this level, UV asserts low and OV is weakly pulled high. Full comparator functionality (VHn/VLn input control) activates above VCC = 2.0V (with 2.1V max UVLO threshold), but the core reset signaling remains functional throughout the 1V–6V range, supporting brown-out detection in low-power states.

Can the reset timeout period of the LTC2914IDHC-1#TRPBF be disabled?

Yes, the reset timeout period can be bypassed by connecting the TMR pin (Pin 15) directly to VCC. When strapped high, the internal timer is disabled and UV/OV outputs respond immediately to input faults without delay. For adjustable timing, an external capacitor (CTMR ≥10pF) is connected between TMR and GND; typical values range from 1nF (8.5ms) to 22nF (200ms) as shown in application schematics.