Analog Devices Inc. LTC2919CMS-2.5#TRPBF

Overview

LTC2919CMS-2.5#TRPBF from Analog Devices is a precision triple/dual-input voltage supervisor IC designed for system-level supply monitoring in space-constrained, low-power applications. It features two adjustable 0.5V-threshold inputs with ±1.5% accuracy over temperature, a dedicated 2.5V VCC UVLO monitor, open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for positive/negative supply UV/OV detection - deployed in desktop computers, network servers, and automotive core/I/O power rails.

For engineers reviewing the LTC2919CMS-2.5#TRPBF datasheet, LTC2919CMS-2.5#TRPBF pinout, LTC2919CMS-2.5#TRPBF application, or LTC2919CMS-2.5#TRPBF equivalent, this page delivers verified technical context, exact package mapping (10-lead MSOP), confirmed pin functions, real-world timing behavior (200ms internal reset timeout), and validated alternative options for dual-rail monitoring with negative-voltage capability.

Technical Context

The LTC2919CMS-2.5#TRPBF implements three independent comparators: two adjustable ADJ inputs (nominal 0.5V threshold, ±1.5% accuracy) and one fixed VCC UVLO (2.175V to 2.250V for 2.5V nominal supply). Polarity selection via the three-state SEL pin enables configurable detection of undervoltage or overvoltage on positive or negative rails without external components.

Its reset logic combines glitch filtering (50–800µs propagation delay), programmable timeout (internal 200ms or external capacitor-based), and guaranteed low output drive down to VCC = 0.5V. The buffered 1.000V reference (±10mV accuracy, ±1mA drive) supports offset-based negative-supply monitoring, while the 6.5V shunt regulator enables operation from supplies up to 6V directly or higher with series current limiting.

Key Specifications

Pinout & Package

Package: 10-Lead Plastic MSOP (3mm × 3mm), exposed pad not connected in MSOP variant; RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6316HUT46D3+T and TPS3808G33DBVR, the LTC2919CMS-2.5#TRPBF provides unique dual adjustable inputs with polarity control and a buffered reference - enabling compact, single-IC solutions for mixed-signature power systems where alternatives require multiple devices or external level-shifting circuitry.

Availability

LTC2919CMS-2.5#TRPBF is available at Aetrix Electronics and suitable for desktop computing, network server, and automotive I/O monitoring applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability validation.

Supply support for LTC2919CMS-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 precision instrumentation, communications, and industrial markets since 1965.

The LTC2919CMS-2.5#TRPBF belongs to Analog Devices' LTC supervisory IC product line, engineered for high-accuracy, low-power, multi-rail voltage monitoring in space-constrained systems - especially where negative supply supervision and flexible fault detection modes are critical.

FAQ

What is the exact VCC UVLO threshold range for LTC2919CMS-2.5#TRPBF?

The LTC2919CMS-2.5#TRPBF has a guaranteed VCC undervoltage lockout threshold of 2.175V (min) to 2.250V (max) over its 0°C to 70°C operating range, corresponding to –10% of its nominal 2.5V supply rating. This specification is explicitly defined in the Electrical Characteristics table for the -2.5 variant and applies regardless of ADJ1/ADJ2 configuration or SEL state.

Can LTC2919CMS-2.5#TRPBF monitor negative voltages, and how is polarity selected?

Yes, the LTC2919CMS-2.5#TRPBF can monitor negative voltages using its ADJ1 and ADJ2 inputs with polarity controlled by the three-state SEL pin. When SEL is grounded, both inputs operate in negative polarity mode - detecting undervoltage when the negative rail magnitude falls below threshold (e.g., –4.3V on a –5V rail) or overvoltage when it exceeds threshold. This is confirmed in Table 1 and Applications Information.

Does LTC2919CMS-2.5#TRPBF require an external capacitor for reset timeout, or is internal timing available?

The LTC2919CMS-2.5#TRPBF supports internal 200ms reset timeout without external components: tying the TMR pin to GND activates this mode. It also supports external capacitor-based timing (9ms/nF) or comparator mode (TMR = VCC, no timeout). The internal 200ms option is explicitly documented in the Electrical Characteristics table under tRST(INT) and used in the Typical Application schematic.

What is the function and accuracy of the REF pin on LTC2919CMS-2.5#TRPBF?

The REF pin on LTC2919CMS-2.5#TRPBF provides a buffered 1.000V reference output with ±10mV accuracy over temperature and ±1mA sourcing/sinking capability. It is used to generate offset voltages for negative-supply monitoring circuits and does not require a bypass capacitor. Its stability and drive strength are verified in the Typical Performance Characteristics graphs (G03, G04).

Is LTC2919CMS-2.5#TRPBF pin-compatible with other variants like LTC2919CMS-3.3#TRPBF?

No, LTC2919CMS-2.5#TRPBF is not pin-compatible with LTC2919CMS-3.3#TRPBF or LTC2919CMS-5#TRPBF in terms of UVLO functionality: while mechanical pinout and package are identical (10-lead MSOP), the VCC UVLO threshold is factory-trimmed per variant - 2.175–2.250V for -2.5, 2.871–2.970V for -3.3, and 4.350–4.500V for -5. Substituting variants changes the third monitored rail's trip point and invalidates system-level UVLO calibration.