Analog Devices Inc. LTC2913HMS-1#PBF

Overview

LTC2913HMS-1#PBF from Analog Devices (acquired Linear Technology) is a dual-input, latching overvoltage/undervoltage supervisor IC designed for simultaneous monitoring of two independent power rails in high-reliability systems. It features ±1.5% threshold accuracy, 44 μA quiescent current, open-drain UV/OV outputs, and guaranteed operation down to VCC = 1 V. Used in industrial servers and automotive control units where fault persistence and glitch immunity are critical.

For engineers reviewing the LTC2913HMS-1#PBF datasheet, LTC2913HMS-1#PBF pinout, LTC2913HMS-1#PBF application, or LTC2913HMS-1#PBF equivalent, key selection factors include its latching OV output (LTC2913-1 variant), adjustable reset timeout via external capacitor, dual VH/VL input architecture per rail, and H-grade (–40°C to +125°C) operation in MSOP-10 package.

Technical Context

The LTC2913HMS-1#PBF implements two independent comparator pairs per monitored voltage rail - one for undervoltage (VHn < 0.5 V) and one for overvoltage (VLn > 0.5 V) detection - with shared open-drain UV and OV outputs. Its internal shunt regulator enables direct connection to supplies up to 6 V or higher with series current-limiting resistor.

Glitch filtering is achieved via integrated low-pass filtering at each comparator output stage, eliminating need for external RC networks while maintaining precise transient rejection. The LATCH pin (Pin 8) enables hardware-controlled OV latch clear/bypass, distinguishing it from the non-latching LTC2913-2 variant.

Key Specifications

Pinout & Package

Package: 10-Lead MSOP (3mm × 3mm), RoHS-compliant, exposed pad optional for thermal enhancement. Pin 1 marked by dot; pin numbering follows standard MSOP convention.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-rail voltage monitoring applications.

Compared with LTC2913IMS-1#PBF, the LTC2913HMS-1#PBF provides extended high-temperature operation essential for under-hood or enclosed industrial use; compared with LTC2914HDD-1#PBF, it offers smaller footprint and lower cost for exactly two-rail applications without negative voltage needs.

Availability

LTC2913HMS-1#PBF is available at Aetrix Electronics and suitable for industrial automation, automotive ADAS modules, and medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2913HMS-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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for the LTC portfolio.

The LTC2913HMS-1#PBF belongs to Linear's precision voltage supervisor family, engineered for high-accuracy, low-power, multi-rail monitoring in mission-critical embedded systems where reliability and temperature resilience are paramount.

FAQ

What is the function of the LATCH pin on the LTC2913HMS-1#PBF?

The LATCH pin (Pin 8) controls the overvoltage output behavior of the LTC2913HMS-1#PBF. When pulled low, the OV output latches low upon detection of any overvoltage condition and remains asserted until the pin is pulled high to clear the latch. This ensures fault persistence even after transient recovery, making LTC2913HMS-1#PBF ideal for safety-critical monitoring where missed faults are unacceptable.

Can the LTC2913HMS-1#PBF monitor voltages above 6 V?

Yes - the LTC2913HMS-1#PBF can monitor rails above 6 V by using an external resistive divider to scale VHn/VLn inputs to within the device's 0.5 V threshold window. Its VCC pin supports up to 6 V directly; for higher VCC supplies, a series current-limiting resistor must be used due to the internal 6.6 V shunt regulator. The LTC2913HMS-1#PBF itself does not regulate input voltages above 6 V at VCC.

How is the reset timeout period set on the LTC2913HMS-1#PBF?

The reset timeout period (tUOTO) for both UV and OV outputs is set by connecting an external capacitor (CTMR) between the TMR pin (Pin 9) and GND. The nominal relationship is tUOTO ≈ 9 ms/nF; a 1 nF capacitor yields ~8.5 ms. The LTC2913HMS-1#PBF datasheet specifies tUOTO = 6–14 ms over temperature. Tying TMR to VCC disables the timeout, causing immediate output deassertion after fault clearance.

Does the LTC2913HMS-1#PBF support negative voltage monitoring?

No - the LTC2913HMS-1#PBF is designed exclusively for positive voltage monitoring. Its VHn and VLn inputs operate relative to GND and require input voltages between –0.3 V and +7.5 V, but the 0.5 V internal reference is fixed and not invertible. For negative rail supervision, Analog Devices recommends the LTC2909 or LTC2914, which explicitly support negative input configurations. The LTC2913HMS-1#PBF cannot detect –5 V or similar negative supplies.

What is the maximum load capacitance the LTC2913HMS-1#PBF UV/OV outputs can drive?

The LTC2913HMS-1#PBF UV and OV outputs feature strong internal pull-downs (typ. 50 Ω on-resistance) and weak pull-ups (~400 kΩ). With a 150 pF load, fall time is ~16.5 ns. Rise time depends on external pull-up strength; using the internal 400 kΩ pull-up, rise time for 150 pF is ~132 ns. For heavier loads (>500 pF), an external stronger pull-up may be needed - but must be sized to ensure total sink current stays within 2.5 mA absolute max rating.