Analog Devices Inc. LTC6993CDCB-4#TRPBF

Overview

LTC6993CDCB-4#TRPBF from Analog Devices is a falling-edge-triggered, retriggerable monostable multivibrator (one-shot pulse generator) with programmable pulse width from 1µs to 33.6 seconds. It uses an internal master oscillator and 8-step programmable divider (NDIV = 1 to 221), set via RSET resistor and DIV pin voltage, delivering ±2.3% pulse width accuracy for widths >512µs. It operates from 2.25V to 5.5V, draws as low as 65µA at 2.25V/800kΩ, and drives CMOS loads up to ±20mA - used in missing-pulse detection and envelope detection circuits.

For engineers reviewing the LTC6993CDCB-4#TRPBF datasheet, LTC6993CDCB-4#TRPBF pinout, LTC6993CDCB-4#TRPBF application, or LTC6993CDCB-4#TRPBF equivalent, key selection criteria include falling-edge trigger polarity, retrigger capability, pulse width drift over temperature (±0.008%/°C for NDIV ≤64), supply voltage sensitivity (–0.1% to +0.4% over 2.25V–5.5V), and DFN-6 package compatibility with high-vibration environments.

Technical Context

The LTC6993CDCB-4#TRPBF implements a digitally controlled analog timing architecture: a current-regulated master oscillator (t_MASTER = 1µs × R_SET/50kΩ) feeds an 8-ratio programmable divider (NDIV), producing t_OUT = NDIV × t_MASTER. Its 4-bit A/D converter on the DIV pin sets both NDIV and output polarity (POL bit), while the SET pin regulates V_SET to 1.00V ±30mV to decouple timing accuracy from supply variation.

Trigger logic responds exclusively to falling edges on TRIG (per LTC6993-4 specification), supports retriggering with minimum inter-trigger interval t_RETRIG = 10ns (V+ = 3.3V, NDIV = 1), and features hysteresis (V_TRIG(RISING) ≈ 0.55×V+ + 185mV; V_{TRIG(FALLING)} ≈ 0.48×V+ – 155mV) for noise immunity on slow signals.

Key Specifications

Pinout & Package

6-lead (2mm × 3mm) Plastic DFN package with exposed pad connected to GND; 1mm profile suitable for low-height applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6993CDCB-4#TRPBF, the LTC6993IDCB-4#TRPBF extends temperature coverage without layout changes, while the LTC6993HDCB-4#TRPBF adds automotive qualification and higher thermal margin - all share identical timing performance, pinout, and DFN-6 footprint.

Availability

LTC6993CDCB-4#TRPBF is available at Aetrix Electronics and suitable for missing-pulse detection, envelope detection, watchdog timer, and high-vibration environment timing applications requiring stable component supply and commercial-grade temperature performance.

Supply support for LTC6993CDCB-4#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, industrial automation, and communications markets.

The TimerBlox® family - including LTC6993CDCB-4#TRPBF - was designed to replace discrete 555-based timers and microcontroller timing routines with pin-configurable, high-accuracy silicon timing solutions for space- and power-constrained systems.

FAQ

What is the trigger polarity and retrigger behavior of LTC6993CDCB-4#TRPBF?

LTC6993CDCB-4#TRPBF is a falling-edge-triggered, retriggerable monostable multivibrator. A falling edge on the TRIG pin initiates the output pulse, and subsequent falling edges occurring before pulse completion extend the output duration. Minimum inter-trigger interval is 10ns at V+ = 3.3V and NDIV = 1, ensuring robust recognition of closely spaced events in high-speed envelope detection.

How is pulse width programmed on LTC6993CDCB-4#TRPBF?

LTC6993CDCB-4#TRPBF pulse width is set by two independent controls: R_SET resistor from SET pin to GND determines master oscillator period (t_MASTER = 1µs × R_SET/50kΩ), and DIV pin voltage selects NDIV divider ratio (1 to 221). Final output width is t_OUT = NDIV × t_MASTER, enabling precise configuration from 1µs to 33.6 seconds using passive components only.

What are the supply voltage and current specifications for LTC6993CDCB-4#TRPBF?

LTC6993CDCB-4#TRPBF operates from 2.25V to 5.5V single supply and draws as little as 65µA at 2.25V with R_SET = 800kΩ and NDIV ≥ 512. Supply current scales with R_SET value and NDIV setting - idle current is 70µA at 5.5V/800kΩ, rising to 200µA at 5.5V/50kΩ - making it suitable for battery-powered envelope detectors with multi-year runtime.

Does LTC6993CDCB-4#TRPBF support output polarity inversion?

Yes, LTC6993CDCB-4#TRPBF supports programmable output polarity via the DIV pin. The MSB (POL bit) of the 4-bit DIVCODE determines whether the output generates a positive pulse (POL = 0) or negative pulse (POL = 1). This is configured using a resistor divider between V+ and GND on the DIV pin, eliminating need for external inverters in signal conditioning paths.

What package and thermal characteristics apply to LTC6993CDCB-4#TRPBF?

LTC6993CDCB-4#TRPBF uses a 6-lead (2mm × 3mm) Plastic DFN package with 1mm height and exposed pad tied to GND. Thermal resistance is θ_JA = 64°C/W and θ_JC = 10.6°C/W. It is rated for 0°C to 70°C operating temperature, with junction temperature limit of 150°C - suitable for commercial-grade embedded systems with moderate power dissipation.