Analog Devices Inc. LTC1727EMS8-2.5#TRPBF

Overview

LTC1727EMS8-2.5#TRPBF from Analog Devices is a micropower precision triple supply monitor IC in 8-lead MSOP package, designed to simultaneously supervise 2.5V, 3.3V, and an adjustable supply (1.0V threshold) with ±1.5% threshold accuracy over temperature, 10µA typical supply current, and 200ms reset delay-used for reliable power-on reset sequencing in multi-rail embedded systems.

For engineers reviewing the LTC1727EMS8-2.5#TRPBF datasheet, LTC1727EMS8-2.5#TRPBF pinout, LTC1727EMS8-2.5#TRPBF application, or LTC1727EMS8-2.5#TRPBF equivalent, this page delivers verified functional identity, validated MS8 pin mapping, confirmed triple-supply monitoring behavior, and real-world selection guidance against comparable triple-voltage supervisors.

Technical Context

The LTC1727EMS8-2.5#TRPBF implements three independent comparators (VCC25, VCC3, VCCA) feeding a 200ms monostable reset generator, with individual open-drain comparator outputs (COMP25, COMP3, COMPA) and a shared active-low RST output. Its power-detect architecture selects the highest-voltage supply (≥1V) among VCC25/VCC3/VCCA as internal power source.

Each comparator features tight 1.5% threshold tolerance across –40°C to +85°C, glitch immunity via 50µs minimum input transition requirement, and guaranteed RST assertion down to VCC25 or VCC3 = 1V. The VCCA input operates at 1.000V ±15mV with high-impedance sensing, enabling precise adjustable rail monitoring via external resistor dividers.

Key Specifications

Pinout & Package

Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm body, 0.65mm pitch, lead-free finish, rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-supply monitoring applications.

Compared with LTC1326-2.5, LTC1727EMS8-2.5#TRPBF trades absolute accuracy for 3× lower quiescent current and diagnostic flexibility via individual COMP outputs; compared with LTC1726-2.5, it removes watchdog complexity and cost where only fixed-reset supervision is required.

Availability

LTC1727EMS8-2.5#TRPBF is available at Aetrix Electronics and suitable for desktop computers, notebook computers, and intelligent instruments requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LTC1727EMS8-2.5#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The LTC1727 series belongs to Analog Devices' precision power monitoring product line, engineered specifically for deterministic, low-power, multi-rail supervision in space-constrained embedded systems where reliability and accuracy are non-negotiable.

FAQ

What is the exact function of the VCCA pin on the LTC1727EMS8-2.5#TRPBF?

The VCCA pin on the LTC1727EMS8-2.5#TRPBF is a high-impedance input with a fixed 1.000V ±15mV threshold, designed to monitor an adjustable supply rail using an external resistor divider. It drives the COMPA open-drain output, which goes high when VCCA exceeds its threshold. Unlike VCC25 and VCC3, VCCA does not power the device-it only provides sensing, and its correct logic state requires VCC3 or VCC25 ≥2.0V to activate the internal bandgap reference.

Can the LTC1727EMS8-2.5#TRPBF monitor only two supplies instead of three?

Yes, the LTC1727EMS8-2.5#TRPBF can be configured to monitor just two supplies. Tie the unused VCCA pin to either VCC3 or VCC25 to disable its comparator, or leave it floating only if externally biased-though tying to a valid rail is preferred for noise immunity. The RST output remains active only when both remaining supplies meet their thresholds for 200ms, preserving full functionality with reduced channel count.

What is the minimum operating voltage required to guarantee correct RST output behavior for the LTC1727EMS8-2.5#TRPBF?

The LTC1727EMS8-2.5#TRPBF guarantees correct RST logic state down to 1V on either VCC25 or VCC3. This means RST will assert low as soon as either supply reaches 1V during power-up and remain asserted until both VCC25 and VCC3 exceed their respective thresholds (2.338V and 3.086V) and sustain compliance for 200ms-enabling robust brownout detection even under severe undervoltage conditions.

How does the LTC1727EMS8-2.5#TRPBF handle power supply glitches or noise on monitored inputs?

The LTC1727EMS8-2.5#TRPBF incorporates dual-stage glitch immunity: first, each comparator requires the input voltage to deviate ≥10% below its threshold for ≥50µs to trigger a response, rejecting short transients; second, the 200ms reset timer acts as a hardware debounce, ensuring RST remains asserted through brief dips. This prevents false resets caused by switching noise, ESD events, or load-step-induced rail sag.

Is the LTC1727EMS8-2.5#TRPBF pin-compatible with other members of the LTC1727/LTC1728 family?

Yes-the LTC1727EMS8-2.5#TRPBF shares identical pinout and package (8-lead MSOP) with all LTC1727 variants in MS8 format, including LTC1727EMS8-5#TRPBF. However, it is not pin-compatible with LTC1728 variants (SOT-23) or SO-8 versions due to differing pin counts and assignments. Always verify the specific part number's threshold set (2.5V/3.3V/ADJ vs 5V/3.3V/ADJ) before substitution.