Analog Devices Inc. LTC2915CTS8-1#TRPBF

Overview

LTC2915CTS8-1#TRPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with 27 selectable reset thresholds, operating from 1.5V to 5.5V supply and consuming only 30μA quiescent current. It features three-state SEL1/SEL2/TOL inputs for selecting nominal voltages (12V to 1.0V + ADJ) and tolerance (–5%, –10%, –15%), ±1.5% threshold accuracy over –40°C to 125°C, and glitch-immune open-drain RST output - used in automotive control systems for reliable power-on reset sequencing.

For engineers reviewing the LTC2915CTS8-1#TRPBF datasheet, LTC2915CTS8-1#TRPBF pinout, LTC2915CTS8-1#TRPBF application, or LTC2915CTS8-1#TRPBF equivalent, key selection criteria include its 8-lead TSOT-23 package, 200ms internal reset timeout option, 0.8V minimum VCC for guaranteed RST assertion, and compatibility with high-temperature automotive environments up to 125°C.

Technical Context

The LTC2915CTS8-1#TRPBF implements a precision comparator-based monitoring architecture with internally trimmed reference dividers and programmable hysteresis via TOL input. Its VM input accepts either fixed thresholds (e.g., 1.8V, 3.3V) or an adjustable 0.5V reference for custom trip points using external resistive dividers.

It integrates a 6.2V shunt regulator on VCC for operation from supplies >5.7V, uses RT pin for reset timeout configuration (200ms internal or capacitor-adjustable), and guarantees RST assertion down to VCC = 0.8V - enabling robust power-up supervision even during brownout conditions.

Key Specifications

Pinout & Package

Package: 8-lead TSOT-23 (ThinSOT™), 3mm × 1.75mm footprint, 1mm profile, lead-free RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2916CTS8-1#TRPBF, the LTC2915CTS8-1#TRPBF offers flexible tolerance selection but lacks manual reset; versus LTC2904CS8#TRPBF, it provides greater configurability at the cost of channel count - making it optimal for single-rail, high-accuracy, margin-test-capable designs.

Availability

LTC2915CTS8-1#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLCs, optical networking equipment, and medical diagnostic devices requiring stable component supply across extended temperature ranges.

Supply support for LTC2915CTS8-1#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 digital signal processing semiconductors.

The LTC2915 belongs to Linear's precision voltage supervisor product line, designed specifically for mission-critical power monitoring in automotive, industrial, and telecom applications demanding guaranteed reset behavior under extreme thermal and electrical stress.

FAQ

What is the function of the TOL pin on the LTC2915CTS8-1#TRPBF?

The TOL pin on the LTC2915CTS8-1#TRPBF is a three-state input that selects the tolerance band (–5%, –10%, or –15%) applied to the monitored voltage threshold. When tied to VCC, it sets –5%; left open, –10%; and grounded, –15%. This enables precise margin testing and accommodates varying supply tolerances without external components - a capability exclusive to the LTC2915 family, not present in the LTC2916CTS8-1#TRPBF.

Can the LTC2915CTS8-1#TRPBF monitor a 12V supply directly?

Yes, the LTC2915CTS8-1#TRPBF can monitor a 12V supply directly using its internal 6.2V shunt regulator on the VCC pin. A series current-limiting resistor must be placed between the 12V source and VCC to restrict input current to ≤5mA. With proper resistor sizing (e.g., ~11kΩ for 12V), the device operates reliably while asserting RST if the VM input drops below the selected 12V threshold (e.g., 11.22V for –5% tolerance).

What is the minimum VCC voltage required for the LTC2915CTS8-1#TRPBF to assert RST?

The LTC2915CTS8-1#TRPBF guarantees RST assertion down to VCC = 0.8V, as specified in the Electrical Characteristics table. This ensures the reset output remains active during severe brownout conditions well below normal operating voltage, providing fail-safe behavior before microcontroller core logic becomes unstable - critical for automotive and industrial safety-critical systems.

How does the RT pin affect reset timing on the LTC2915CTS8-1#TRPBF?

The RT pin on the LTC2915CTS8-1#TRPBF configures the reset timeout period: tying RT to VCC yields ~200ms, leaving it floating gives ~400μs, and connecting an external capacitor (CRT) to GND sets tRST ≈ 9ms/nF. For example, a 2.2nF capacitor produces ~20ms. This flexibility allows optimization for noise immunity (longer timeout) or fast recovery (shorter timeout), all without changing firmware or external logic.

Is the LTC2915CTS8-1#TRPBF compatible with 1.0V supply rails?

Yes, the LTC2915CTS8-1#TRPBF supports 1.0V nominal monitoring with ±5%/±10%/±15% tolerance options (0.920V to 0.850V trip range). Its VM input operates with high impedance (≥0.5MΩ), minimizing loading on low-voltage rails. Combined with ±1.5% threshold accuracy and guaranteed operation down to VCC = 0.8V, it delivers reliable supervision for modern ultra-low-voltage digital cores and I/O domains.