Analog Devices Inc. LTC2914CDHC-1#PBF

Overview

LTC2914CDHC-1#PBF 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#PBF datasheet, LTC2914CDHC-1#PBF pinout, LTC2914CDHC-1#PBF application, or LTC2914CDHC-1#PBF equivalent, key selection criteria include guaranteed 1V minimum VCC operation, adjustable reset timeout via external capacitor, buffered 1V reference for negative rail monitoring, and latched OV behavior distinguishing it from the -2 variant.

Technical Context

The LTC2914CDHC-1#PBF implements four independent comparator pairs (VHn/VLn), each configurable for positive or negative polarity via the three-state SEL pin. All UV conditions drive a common open-drain UV output; all OV conditions drive a common open-drain OV output with latching capability controlled by the LATCH pin.

Threshold detection uses a precision 0.5 V internal reference (±1.5% over 0°C to 70°C), referenced to a buffered 1 V output (±15 mV over temperature). Input glitch rejection is achieved through internal low-pass filtering on each comparator output, eliminating need for external hysteresis while maintaining accurate trip points.

Key Specifications

Pinout & Package

Package: 16-lead (5 mm × 3 mm) plastic DFN with exposed pad (Pin 17, optional GND connection); RoHS-compliant, lead-free finish; 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 LTC2914CDHC-2#PBF, the LTC2914CDHC-1#PBF provides hardware-enforced fault retention critical for safety-critical power sequencing; versus TPS3808G33DBVR, it delivers four-rail supervision with negative voltage support and design flexibility at lower total board area and BOM count.

Availability

LTC2914CDHC-1#PBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and embedded industrial controllers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for LTC2914CDHC-1#PBF 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, serving industrial, automotive, communications, and computing markets.

The LTC2914 product line delivers highly integrated, micropower voltage supervisors optimized for space-constrained, multi-rail systems where accuracy, low IQ, and flexible polarity configuration are essential - especially in computing and infrastructure equipment.

FAQ

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

The LTC2914CDHC-1#PBF 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 commercial-grade specification aligns with desktop and notebook computing environments where ambient thermal profiles remain within this band. The device maintains ±1.5% threshold accuracy across this full range, ensuring consistent reset behavior without derating.

Does the LTC2914CDHC-1#PBF support monitoring of negative supply voltages?

Yes, the LTC2914CDHC-1#PBF supports monitoring of up to two negative supply voltages using its buffered 1 V reference (REF pin) and three-state SEL pin. When configured for negative monitoring, VHn triggers OV and VLn triggers UV - enabling accurate supervision of rails such as –5 V or –12 V with standard resistor dividers. The datasheet confirms this capability in the Pin Functions and Applications Information sections.

How does the LATCH pin function on the LTC2914CDHC-1#PBF?

On the LTC2914CDHC-1#PBF, the LATCH pin (Pin 13) controls OV output behavior: when pulled low, OV latches low upon detection and remains asserted until LATCH is pulled high to clear the latch. When held high, OV operates non-latching with the same timeout delay as UV. This hardware-based latching eliminates reliance on firmware for fault persistence - a key differentiator from the -2 variant and critical for fail-safe power sequencing.

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

The LTC2914CDHC-1#PBF guarantees functional UV and OV outputs 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; full comparator operation begins above VCC = 2 V. This 1 V minimum enables supervision during deep brownout conditions where other supervisors would cease operation.

Can the reset timeout period of the LTC2914CDHC-1#PBF be disabled?

Yes, the reset timeout period of the LTC2914CDHC-1#PBF can be disabled by tying the TMR pin (Pin 15) directly to VCC. This bypasses the external capacitor timing network and causes UV and OV to respond immediately to input transitions - with no hold time after fault clearance. The datasheet explicitly states "Tie pin to VCC to bypass timer" in the Pin Functions section, confirming this configuration.