Analog Devices Inc. LTC6993CDCB-2#TRPBF

Overview

LTC6993CDCB-2#TRPBF from Analog Devices is a retriggerable rising-edge monostable multivibrator (one-shot pulse generator) with programmable pulse width from 1µs to 33.6 seconds, ±2.3% accuracy for pulses >512µs, 70µA supply current at 10µs output width, and CMOS output sourcing/sinking 20mA. It operates from 2.25V to 5.5V and is used in watchdog timers, missing-pulse detection, and envelope detection circuits.

For engineers reviewing the LTC6993CDCB-2#TRPBF datasheet, LTC6993CDCB-2#TRPBF pinout, LTC6993CDCB-2#TRPBF application, or LTC6993CDCB-2#TRPBF equivalent, this page delivers verified timing parameters, DFN-6 package layout, retrigger behavior, DIV/SET resistor programming details, and automotive-grade alternatives compliant with AEC-Q100.

Technical Context

The LTC6993CDCB-2#TRPBF implements a master oscillator with 1µs base period, programmable via ISET current sourced from the SET pin (regulated at 1.00V ±30mV), and an internal 4-bit A/D converter on the DIV pin that selects both NDIV divider ratio (1 to 2²¹) and output polarity (POL bit). Its retrigger logic extends pulse width on successive rising-edge triggers while maintaining ≥50ns minimum inter-trigger spacing.

Timing accuracy relies on RSET tolerance and inherent device error (±2.3% for NDIV ≥ 512), not VSET drift, because VSET is internally regulated. Pulse width jitter is as low as 0.03%P-P at NDIV = 4096 and 5.5V supply, with propagation delay under 11ns at 5.5V and rise/fall times ≤1.1ns/1.0ns respectively.

Key Specifications

Pinout & Package

6-lead plastic DFN (2mm × 3mm), thin profile (1mm height), exposed pad connected to GND. Pin 7 (exposed pad) is electrically tied to GND and may be soldered to PCB ground plane for improved thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6993CDCB-2#TRPBF, the LTC6993IDCB-2#TRPBF and LTC6993HDCB-2#TRPBF provide identical timing performance and retrigger behavior but extend operational reliability into colder and hotter environments-enabling reuse of the same schematic and layout across multiple product tiers.

Availability

LTC6993CDCB-2#TRPBF is available at Aetrix Electronics and suitable for watchdog timer implementations, missing-pulse detection circuits, envelope detection subsystems, and high-vibration industrial controls requiring stable component supply across production lifecycles.

Supply support for LTC6993CDCB-2#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 industrial, automotive, communications, and healthcare markets.

The TimerBlox family-including LTC6993CDCB-2#TRPBF-is designed for precision silicon timing applications where programmability, low power, and small footprint replace traditional RC or crystal-based solutions in embedded control and monitoring systems.

FAQ

What is the minimum and maximum pulse width achievable with LTC6993CDCB-2#TRPBF?

The LTC6993CDCB-2#TRPBF supports a pulse width range from 1µs to 33.6 seconds. Minimum width occurs at NDIV = 1 and RSET = 50kΩ; maximum at NDIV = 2²¹ and RSET = 800kΩ. Accuracy degrades at extremes: ±4.9% for 1µs–8µs, ±2.3% for pulses >512µs. The LTC6993CDCB-2#TRPBF achieves this using only two external resistors-no crystals or trimmers required.

How does the retrigger capability of LTC6993CDCB-2#TRPBF differ from LTC6993-1 variants?

LTC6993CDCB-2#TRPBF is rising-edge retriggerable: each new rising edge on TRIG while OUT is high extends the pulse by tOUT from that trigger point. In contrast, LTC6993-1 ignores subsequent triggers until the initial pulse completes and a short recovery time (tARM ≈ –4ns) elapses. This makes LTC6993CDCB-2#TRPBF ideal for variable-duration gating or event accumulation, whereas LTC6993-1 suits fixed-interval timeouts.

Can LTC6993CDCB-2#TRPBF generate negative output pulses?

Yes, LTC6993CDCB-2#TRPBF can generate negative (low-going) output pulses by programming the POL bit via the DIV pin voltage. When DIVCODE = 8–15, POL = 1 and OUT asserts low for tOUT duration. This is selected using a resistor divider between V+ and GND on the DIV pin; Table 1 in the datasheet specifies exact R1/R2 values for each DIVCODE. The LTC6993CDCB-2#TRPBF maintains full timing accuracy regardless of polarity selection.

What is the recommended bypassing strategy for LTC6993CDCB-2#TRPBF?

LTC6993CDCB-2#TRPBF requires a 0.1µF ceramic capacitor placed as close as possible between V+ (Pin 5) and GND (Pin 2), with short, low-inductance traces. This suppresses supply noise that could modulate the master oscillator or cause false triggering. No additional bulk capacitance is needed for typical operation. Avoid routing noisy signals near the SET or DIV pins, and limit capacitance on those nodes to <10pF (SET) and <100pF (DIV) to preserve timing stability and accuracy.

Is LTC6993CDCB-2#TRPBF qualified for automotive applications?

No, LTC6993CDCB-2#TRPBF is rated for 0°C to 70°C and is not AEC-Q100 qualified. However, pin-compatible automotive-grade alternatives exist: LTC6993IS6-2#WTRPBF (–40°C to 85°C) and LTC6993HS6-2#WTRPBF (–40°C to 125°C) carry the #W suffix and undergo controlled manufacturing per automotive reliability standards. These variants retain identical timing behavior and electrical specs-only temperature grading and qualification differ. The LTC6993CDCB-2#TRPBF remains suitable for commercial and industrial applications within its specified range.