Analog Devices Inc. LTC2914HGN-1#TRPBF

Overview

LTC2914HGN-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 features ±1.5% threshold accuracy over temperature, 62µA quiescent current, adjustable reset timeout via external capacitor, and support for both positive and negative voltage monitoring using a buffered 1V reference. It is deployed in industrial-grade server power management and core voltage supervision.

For engineers reviewing the LTC2914HGN-1#TRPBF datasheet, LTC2914HGN-1#TRPBF pinout, LTC2914HGN-1#TRPBF application, or LTC2914HGN-1#TRPBF equivalent, key selection considerations include its –40°C to 125°C operating range, latching OV output (LTC2914-1 variant), SSOP-16 package, and dual-polarity input capability enabled by the three-state SEL pin.

Technical Context

The LTC2914HGN-1#TRPBF implements four independent comparator pairs (VHn/VLn), each sharing a common 0.5V internal threshold reference, with polarity programmable via the SEL pin's three-state logic (VCC/GND/open). Its UV and OV outputs are open-drain with weak internal pull-ups to VCC and guaranteed assertion down to VCC = 1V.

It integrates a shunt regulator on VCC (6.6V typical), supports glitch filtering via internal low-pass timing on comparator outputs, and provides a buffered 1V reference (±1.5mV max drift over –40°C to 125°C) for negative rail sensing. The LATCH pin enables persistent OV fault indication until actively cleared.

Key Specifications

Pinout & Package

Package: 16-Lead Plastic SSOP (GN), 5.3mm × 5.3mm, exposed pad optional, θJA = 110°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6805US29D3+T and TPS3307-33DGNR, the LTC2914HGN-1#TRPBF uniquely delivers quad-rail UV/OV supervision with latching, negative rail capability, and ±1.5% accuracy across –40°C to 125°C - making it the sole fit for high-integrity embedded power management where fault persistence and mixed-polarity coverage are mandatory.

Availability

LTC2914HGN-1#TRPBF is available at Aetrix Electronics and suitable for industrial control systems, automotive domain controllers, and medical imaging equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2914HGN-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 power management semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2914 product line was designed specifically for space-constrained, high-reliability power supervision in multi-rail systems - emphasizing micropower operation, wide temperature tolerance, and flexible polarity configuration without external components.

FAQ

What is the operating temperature range of the LTC2914HGN-1#TRPBF?

The LTC2914HGN-1#TRPBF is rated for –40°C to 125°C, matching the H-grade specification. This qualifies it for under-hood automotive, industrial motor drives, and high-density server applications where junction temperatures exceed 100°C. Its ±1.5% threshold accuracy is guaranteed across this full range, unlike C- or I-grade variants.

How does the SEL pin configure polarity for negative voltage monitoring on the LTC2914HGN-1#TRPBF?

On the LTC2914HGN-1#TRPBF, the three-state SEL pin selects polarity: tied to GND configures both VH3/VL3 and VH4/VL4 for negative monitoring (VHn triggers OV, VLn triggers UV); tied to VCC configures both for positive monitoring; left open configures VH3/VL3 positive and VH4/VL4 negative. This eliminates external logic or resistors for mixed-rail systems.

Does the LTC2914HGN-1#TRPBF support overvoltage detection on negative supplies?

Yes. When configured for negative monitoring (e.g., SEL = GND), the LTC2914HGN-1#TRPBF treats VHn inputs as overvoltage triggers: for a –5V rail, VH3 < 0.5V indicates the supply has become *more negative* than the programmed threshold - i.e., an overvoltage condition. This is explicitly documented in the datasheet's Table 1 and Figure 2.

What is the purpose of the LATCH pin on the LTC2914HGN-1#TRPBF?

The LATCH pin on the LTC2914HGN-1#TRPBF controls the overvoltage output behavior: when pulled low, OV latches low upon detection and stays asserted until LATCH is driven high. When pulled high, OV behaves like UV - asserting for an adjustable timeout period after fault clearance. This enables either persistent fault signaling or self-clearing reset, depending on system architecture needs.

Can the LTC2914HGN-1#TRPBF monitor a 12V supply directly without external resistors?

No. The LTC2914HGN-1#TRPBF VHn/VLn inputs tolerate up to 7.5V absolute maximum. To monitor 12V, a resistive divider must scale the voltage to ≤0.5V at the input pins. For example, a 22.6kΩ/1.18kΩ divider reduces 12V to 0.5V at VH1. The design procedure in the datasheet (page 9) ensures ±1.5% total accuracy including resistor tolerances.