Analog Devices Inc. LTC2916CDDB-1#TRMPBF

Overview

LTC2916CDDB-1#TRMPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with fixed –5% tolerance, nine selectable nominal thresholds (12V to 1.0V + ADJ), and integrated manual reset input. It operates from 1.5V to 5.5V supply, consumes 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 125°C, and delivers glitch-immune open-drain RST output for microprocessor reset in automotive control systems.

For engineers reviewing the LTC2916CDDB-1#TRMPBF datasheet, LTC2916CDDB-1#TRMPBF pinout, LTC2916CDDB-1#TRMPBF application, or LTC2916CDDB-1#TRMPBF equivalent, key selection criteria include its fixed –5% tolerance, MR pin support for push-button reset, 200ms internal timeout option, 8-lead DFN (3mm × 2mm) package with exposed pad, and guaranteed operation down to VCC = 0.8V for robust power-up sequencing.

Technical Context

The LTC2916CDDB-1#TRMPBF implements a precision comparator-based monitoring architecture with three-state SEL1/SEL2 inputs selecting one of nine internal reference voltages, a fixed –5% tolerance band, and dedicated MR input that directly triggers reset assertion independent of VM state. Its internal 6.2V shunt regulator enables high-voltage operation up to 12V when used with an external series resistor on VCC.

Glitch immunity is achieved via dual-stage protection: a 10–150μs input glitch rejection window (tUV) combined with a programmable reset timeout (tRST) ranging from ~400μs (RT floating) to 200ms (RT tied to VCC) or adjustable via external capacitor (9ms/nF scaling). The RST output remains asserted low until both VCC ≥ 0.8V and VM exceeds the selected threshold for the full timeout duration.

Key Specifications

Pinout & Package

Package: 8-lead (3mm × 2mm) plastic DFN with exposed thermal pad (Pin 9), rated for 0°C to 70°C operation (C-grade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2915CDDB-1#TRMPBF, the LTC2916CDDB-1#TRMPBF trades tolerance flexibility for integrated manual reset functionality-critical for field serviceability-while maintaining identical threshold selection, accuracy, and package. Compared with LTC2903CMS8-3.3#PBF, it offers full configurability across nine rails and active fault recovery at the cost of higher complexity and price.

Availability

LTC2916CDDB-1#TRMPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLC modules, telecom base station power management, and medical diagnostic imaging subsystems requiring stable component supply with guaranteed long-term availability.

Supply support for LTC2916CDDB-1#TRMPBF 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 for precision instrumentation, industrial automation, and communications infrastructure.

The LTC2916 belongs to Linear's precision voltage supervisor product line, designed specifically for automotive, industrial, and telecom applications demanding guaranteed accuracy, wide temperature operation, and robust fault recovery mechanisms-including manual reset and glitch immunity.

FAQ

What is the function of the MR pin on the LTC2916CDDB-1#TRMPBF?

The MR (Manual Reset) pin on the LTC2916CDDB-1#TRMPBF is an active-low input with an internal 100kΩ pull-up to VCC, enabling direct interface to a momentary pushbutton without external components. When pulled low, it forces the RST output low for the full reset timeout period-regardless of VM voltage-allowing field-serviceable system recovery. This feature is exclusive to the LTC2916 family and not present in the LTC2915.

How does the LTC2916CDDB-1#TRMPBF achieve ±1.5% threshold accuracy over temperature?

The LTC2916CDDB-1#TRMPBF achieves ±1.5% threshold accuracy over –40°C to 125°C through laser-trimmed internal voltage references and matched comparator circuitry. This specification applies to all nine selectable nominal thresholds (12V to 1.0V + ADJ) and is guaranteed across the full operating temperature range-not just at 25°C-making it suitable for automotive under-hood deployment where thermal stability is critical.

Can the LTC2916CDDB-1#TRMPBF monitor supplies above 5.5V?

Yes-the LTC2916CDDB-1#TRMPBF can monitor supplies above 5.5V using its internal 6.2V shunt regulator on the VCC pin. To operate from a supply exceeding 5.7V (e.g., 12V automotive battery), a series current-limiting resistor must be placed between the supply and VCC to restrict input current to ≤5mA. The datasheet provides the formula RCC = (VS(MIN) − 5.7V)/5mA to size this resistor correctly.

What is the minimum VCC voltage required for the LTC2916CDDB-1#TRMPBF to assert RST reliably?

The LTC2916CDDB-1#TRMPBF guarantees RST assertion low for VCC ≥ 0.8V, independent of VM voltage. This ensures robust reset generation during power-up brownouts or deep undervoltage conditions where other supervisors may fail to activate. Below 0.8V, RST behavior is not guaranteed, and the device enters undervoltage lockout.

How is the reset timeout configured on the LTC2916CDDB-1#TRMPBF?

The reset timeout on the LTC2916CDDB-1#TRMPBF is configured via the RT pin: tying RT to VCC selects the internal 200ms timeout; leaving RT floating yields ~400μs; connecting an external capacitor CRT from RT to GND sets tRST ≈ 9ms/nF (e.g., 2.2nF → ~20ms). The timeout begins when VM rises above threshold and holds RST low for the full duration before releasing.