Analog Devices Inc. LTC2914HDHC-2#TRPBF

Overview

LTC2914HDHC-2#TRPBF from Analog Devices (formerly Linear Technology) is a quad-input, dual-polarity voltage supervisor IC designed for simultaneous monitoring of four independent supply rails-supporting both positive and negative voltages-with ±1.5% threshold accuracy over –40°C to +125°C, 62 µA quiescent current, and adjustable reset timeout. It serves as the core fault-detection element in high-reliability power management systems for industrial computing and telecom infrastructure.

For engineers reviewing the LTC2914HDHC-2#TRPBF datasheet, LTC2914HDHC-2#TRPBF pinout, LTC2914HDHC-2#TRPBF application, or LTC2914HDHC-2#TRPBF equivalent, key selection criteria include guaranteed UV/OV assertion at VCC ≥ 1V, DIS-enabled output disable functionality, buffered 1V reference for negative rail sensing, and DFN-16 (5mm × 3mm) package compatibility with high-density PCB layouts.

Technical Context

The LTC2914HDHC-2#TRPBF implements four independent comparator pairs (VHn/VLn), each configurable via the three-state SEL pin for positive or negative polarity monitoring. Its internal 0.5V threshold reference is scaled by external resistor dividers to set precise UV/OV trip points across all four channels.

Unlike the -1 variant, the -2 version replaces latching OV behavior with a dedicated DIS (Pin 13) input that disables both UV and OV outputs when pulled high-enabling system-level reset coordination without asserting false faults during controlled power sequencing or firmware-initiated resets.

Key Specifications

Pinout & Package

Package: 16-lead plastic DFN (5mm × 3mm), exposed pad (Pin 17) optional GND connection. Thermal resistance θJA = 43.5°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2914IDHC-2#TRPBF, the LTC2914HDHC-2#TRPBF enables deployment in under-hood automotive ECUs or high-ambient industrial drives; versus TPS3307-33DGNR, it provides full quad monitoring, programmable thresholds, and native negative-voltage support-eliminating external level-shifters and reducing design complexity.

Availability

LTC2914HDHC-2#TRPBF is available at Aetrix Electronics and suitable for server power sequencing, industrial PLC I/O modules, telecom line cards, and medical imaging subsystems requiring stable component supply across extended temperature ranges.

Supply support for LTC2914HDHC-2#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, acquired Linear Technology in 2017 to strengthen its precision power and interface portfolio.

The LTC2914 product line delivers highly accurate, low-quiescent-current voltage supervision for mission-critical power systems in computing, industrial, and communications infrastructure-designed specifically for space-constrained, thermally demanding environments.

FAQ

What is the operating temperature range of the LTC2914HDHC-2#TRPBF?

The LTC2914HDHC-2#TRPBF is specified for continuous operation from –40°C to +125°C ambient temperature, validated across the full range for threshold accuracy (±1.5%), supply current (62 µA typ), and timing parameters (tUOTO, tUOD). This H-grade rating makes it suitable for under-hood automotive, industrial motor drives, and base station power modules where thermal margins exceed commercial or industrial grades.

How does the DIS pin on the LTC2914HDHC-2#TRPBF differ from the LATCH pin on the LTC2914-1 variants?

The DIS (Pin 13) on the LTC2914HDHC-2#TRPBF is an active-high disable input that forces both UV and OV outputs into a high-impedance state (weakly pulled high) regardless of input fault conditions-enabling clean reset suppression during firmware-controlled power cycles. In contrast, the LATCH pin on LTC2914-1 devices is an active-low latch clear/bypass input that only affects OV behavior and cannot disable UV output. The DIS function is exclusive to -2 variants like the LTC2914HDHC-2#TRPBF.

Can the LTC2914HDHC-2#TRPBF monitor negative voltages without external op-amps?

Yes-the LTC2914HDHC-2#TRPBF monitors negative supplies natively using its buffered 1V REF output and three-state SEL pin. When SEL is grounded, V3 and V4 inputs are configured for negative monitoring: VH3 triggers OV when below 0.5V (i.e., more negative than threshold), and VL3 triggers UV when above 0.5V (i.e., less negative). External resistor dividers referenced to REF replace op-amps, eliminating offset drift and power overhead.

What is the minimum VCC voltage required for valid UV/OV output assertion in the LTC2914HDHC-2#TRPBF?

The LTC2914HDHC-2#TRPBF guarantees UV low and OV high assertion down to VCC = 1V, per Absolute Maximum Ratings and Electrical Characteristics tables. At VCC = 1V, VOL on UV is ≤0.15V with 100µA sink current, ensuring reliable logic-level signaling to microcontrollers or FPGAs during brown-out conditions-critical for fail-safe shutdown in industrial power systems.

How do I calculate resistor values for a 5V ±10% supply monitored by the LTC2914HDHC-2#TRPBF?

For a 5V nominal supply with 10% tolerance (UV = 4.5V, OV = 5.5V), use the 3-resistor positive monitoring equations: RA ≈ 45.3kΩ sets OV trip, RB ≈ 10kΩ sets UV trip, and RC ≈ 442kΩ completes the divider. These values assume 1% resistors and yield threshold errors within ±1.5% (LTC2914HDHC-2#TRPBF) + ±1% (resistors) = ±2.5% total, meeting typical system requirements. Full derivation is provided in the Linear Technology application note DC1833.