Analog Devices Inc. LTC6993CS6-3#TRPBF

Overview

LTC6993CS6-3#TRPBF from Analog Devices is a falling-edge–triggered, non-retriggerable monostable multivibrator (one-shot) in TSOT-23-6 package, delivering programmable pulse widths from 1µs to 33.6 seconds via RSET resistor and DIV pin voltage. It operates from 2.25V to 5.5V, draws as low as 65µA at 2.25V/800kΩ, and features CMOS output sourcing/sinking ±20mA. It is used in missing-pulse detection and envelope detection circuits where precise, polarity-controlled timing is required.

For engineers reviewing the LTC6993CS6-3#TRPBF datasheet, LTC6993CS6-3#TRPBF pinout, LTC6993CS6-3#TRPBF application, or LTC6993CS6-3#TRPBF equivalent, this page provides verified timing accuracy (±4.9% at 1µs), NDIV programmability (1 to 2²¹), VSET regulation (1.00V ±30mV), trigger propagation delay (28ns at 2.25V), and temperature range (0°C to 70°C) - all confirmed for the exact SOT-23 variant with LTFMH marking.

Technical Context

The LTC6993CS6-3#TRPBF implements a master oscillator with t_MASTER = 1µs × R_SET/50kΩ, followed by an internal 4-bit A/D converter that maps DIV pin voltage to DIVCODE (0–15), selecting both NDIV (1, 8, 64, ..., 2²¹) and output polarity (POL bit). Its falling-edge trigger logic ignores subsequent inputs until pulse completion, enabling deterministic one-shot behavior in noise-prone environments.

It uses regulated VSET (1.00V ±30mV) to decouple pulse width accuracy from supply variation, achieving ±0.008%/°C drift over temperature and <±0.9% supply-induced error. The block diagram confirms dedicated digital filtering on TRIG and halt-on-ISET<500nA functionality - both active in this variant per Rev. F documentation.

Key Specifications

Pinout & Package

Package: 6-Lead Plastic TSOT-23 (0.95mm height), RoHS-compliant, lead-free finish. Pin 1 marked with dot; exposed pad optional for GND connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6993CS6-3#TRPBF, the IS6-3 variant offers broader temperature coverage without trade-offs, while the CS6-4 variant changes core timing behavior - making it unsuitable as a drop-in replacement unless retrigger logic is part of the system design.

Availability

LTC6993CS6-3#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, full traceability, and commercial-temperature reliability.

Supply support for LTC6993CS6-3#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 is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial, and communications systems.

The TimerBlox® family - including LTC6993CS6-3#TRPBF - was designed for plug-and-play timing solutions in space-constrained, low-power systems where microcontroller-based timing introduces latency, code overhead, or reliability concerns.

FAQ

What is the trigger polarity and retrigger behavior of the LTC6993CS6-3#TRPBF?

The LTC6993CS6-3#TRPBF is a falling-edge–triggered, non-retriggerable monostable. A falling edge on the TRIG pin initiates the output pulse, and subsequent falling edges during the active pulse are ignored until the output completes and the internal rearm cycle finishes. This behavior is fixed per device version and cannot be altered by configuration pins or registers.

How do I calculate the output pulse width for the LTC6993CS6-3#TRPBF?

The output pulse width is calculated as t_OUT = NDIV × R_SET / 50kΩ × 1µs, where NDIV is selected by the DIV pin voltage (via DIVCODE 0–15) and R_SET is the resistor from SET to GND. For example, R_SET = 200kΩ and DIVCODE = 3 (NDIV = 512) yields t_OUT = 512 × 200k / 50k × 1µs = 2.048ms. Accuracy is ±4.9% at 1µs and improves to ±2.3% above 512µs.

What is the maximum output current drive capability of the LTC6993CS6-3#TRPBF?

The LTC6993CS6-3#TRPBF provides rail-to-rail CMOS output with ±20mA drive strength at V+ = 2.25V to 5.5V. At V+ = 3.3V and I_OUT = –10mA, VOH is guaranteed ≥2.75V; at I_OUT = 10mA, VOL is ≤0.46V. Output resistance is ~30Ω, so external series resistors are recommended when driving LEDs or low-impedance loads to limit current to safe levels.

Can the LTC6993CS6-3#TRPBF operate from a 2.25V supply?

Yes, the LTC6993CS6-3#TRPBF is fully specified for operation from 2.25V to 5.5V. At 2.25V, supply current drops to 65µA (with R_SET = 800kΩ and NDIV ≥ 512), propagation delay increases to 28ns, and output voltage swing remains rail-to-rail (VOL ≤ 0.54V, VOH ≥ 1.58V at rated load). All timing accuracy and DIVCODE functionality remain valid across the full supply range.

What package and marking does the LTC6993CS6-3#TRPBF use?

The LTC6993CS6-3#TRPBF uses the 6-lead Plastic TSOT-23 package (0.95mm height) with marking code LTFMH. Pin 1 is identified by a dot; the package is RoHS-compliant and lead-free. It shares pinout compatibility with other S6 variants (e.g., LTC6993IS6-3#TRPBF) but differs from DFN (DCB) versions in footprint and thermal characteristics.