Analog Devices Inc. LTC6993IDCB-3#TRPBF

Overview

LTC6993IDCB-3#TRPBF from Analog Devices is a falling-edge-triggered, non-retriggerable monostable multivibrator (one-shot) with programmable pulse width from 1µs to 33.6 seconds. It uses an internal master oscillator and 4-bit programmable divider (NDIV = 1 to 2²¹) set via the DIV pin, and pulse width is configured by a single RSET resistor (50kΩ–800kΩ). It operates from 2.25V to 5.5V, delivers ±20mA CMOS output drive, and is qualified for industrial temperature range (–40°C to +85°C) in a 6-lead 2mm × 3mm DFN package.

For engineers reviewing the LTC6993IDCB-3#TRPBF datasheet, LTC6993IDCB-3#TRPBF pinout, LTC6993IDCB-3#TRPBF application, or LTC6993IDCB-3#TRPBF equivalent, key selection criteria include confirmed falling-edge trigger behavior, non-retriggerable timing response, ±2.3% pulse width accuracy over >512µs, 70µA supply current at 10µs pulse width, and compatibility with 2.25V–5.5V single-supply systems requiring precise, low-power one-shot generation.

Technical Context

The LTC6993IDCB-3#TRPBF implements a digitally controlled analog timing architecture: a voltage-regulated SET pin (VSET = 1.00V ±30mV) sources ISET current (1.25µA–20µA) to set tMASTER = 1µs × RSET/50kΩ, while a 4-bit A/D converter on the DIV pin selects NDIV and output polarity (POL bit). Its internal digital filter rejects noise on DIV and TRIG inputs, and propagation delay (tPD) is 11–28ns depending on supply voltage.

Unlike conventional RC timers, it avoids capacitor-based drift and offers guaranteed pulse width accuracy across temperature (±0.006%/°C for NDIV ≥ 512) and supply voltage (±0.2% over V+ = 2.25V–5.5V), with fast recovery time (tARM = –4ns) and no external timing capacitors required.

Key Specifications

Pinout & Package

Package: 6-lead (2mm × 3mm) plastic DFN (DCB), exposed pad connected to GND, 0.5mm pitch, 1mm profile. RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar monostable timing applications.

Compared with LTC6993IDCB-4#TRPBF, the LTC6993IDCB-3#TRPBF provides deterministic non-retriggerable behavior essential for watchdog timeout and missing-pulse detection, while MAX6816EUT+T lacks programmable polarity and sub-microsecond resolution-making LTC6993IDCB-3#TRPBF the sole option for precision falling-edge monostable timing in industrial systems.

Availability

LTC6993IDCB-3#TRPBF is available at Aetrix Electronics and suitable for industrial automation, embedded watchdog systems, and sensor signal conditioning requiring stable component supply, long-lifecycle support, and guaranteed performance across –40°C to +85°C.

Supply support for LTC6993IDCB-3#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The TimerBlox® family-including LTC6993IDCB-3#TRPBF-is designed for precision, low-power, capacitorless timing in space-constrained and thermally demanding applications where traditional RC or crystal-based solutions lack stability or flexibility.

FAQ

What is the trigger polarity and retrigger behavior of the LTC6993IDCB-3#TRPBF?

The LTC6993IDCB-3#TRPBF is a falling-edge-triggered, non-retriggerable monostable. It initiates its output pulse only on a falling transition at the TRIG pin and ignores all subsequent falling edges until the current pulse completes and the internal rearm cycle finishes (tARM = –4ns). This behavior ensures strict one-shot operation critical for watchdog and timeout applications where spurious triggers must be rejected.

How is pulse width programmed on the LTC6993IDCB-3#TRPBF?

Pulse width on the LTC6993IDCB-3#TRPBF is set by two independent controls: an RSET resistor from SET to GND determines the master oscillator period (tMASTER = 1µs × RSET/50kΩ), and a resistor divider on the DIV pin selects NDIV (1 to 2²¹) and output polarity. The final output width is tOUT = NDIV × RSET/50kΩ × 1µs. No timing capacitor is required, eliminating drift and aging effects.

What are the supply voltage and current requirements for the LTC6993IDCB-3#TRPBF?

The LTC6993IDCB-3#TRPBF operates from 2.25V to 5.5V single supply and draws only 70µA supply current at 10µs pulse width and 2.25V. Idle current scales with RSET value and NDIV setting, ranging from 55µA to 200µA depending on configuration. A 0.1µF ceramic capacitor must be placed between V+ and GND, directly at the pins.

Can the LTC6993IDCB-3#TRPBF generate both positive and negative output pulses?

Yes, the LTC6993IDCB-3#TRPBF supports configurable output polarity via the DIV pin voltage. When DIVCODE's MSB (POL bit) = 0, OUT produces a positive pulse (GND → V+); when POL = 1, OUT produces a negative pulse (V+ → GND). This is selected by setting VDIV/V+ to specific ratios (e.g., 0.09375 for NDIV = 8, POL = 0; 0.90625 for NDIV = 8, POL = 1), enabling direct interface with both active-high and active-low downstream logic.

What package and thermal specifications apply to the LTC6993IDCB-3#TRPBF?

The LTC6993IDCB-3#TRPBF uses a 6-lead 2mm × 3mm plastic DFN (DCB) package with exposed thermal pad connected to GND. It is rated for –40°C to +85°C operating temperature, with θJA = 64°C/W and junction-to-case thermal resistance θJC = 10.6°C/W. The exposed pad must be soldered to a PCB ground plane for optimal thermal performance and EMI suppression.