Analog Devices Inc. LTC6993CS6-4#TRPBF

Overview

LTC6993CS6-4#TRPBF from Analog Devices is a falling-edge-triggered, retriggerable monostable multivibrator (one-shot) in TSOT-23 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 55µA at 2.25V/800kΩ, and drives ±20mA CMOS output - used in missing-pulse detection, watchdog timers, and envelope detection in portable and automotive systems.

For engineers reviewing the LTC6993CS6-4#TRPBF datasheet, LTC6993CS6-4#TRPBF pinout, LTC6993CS6-4#TRPBF application, or LTC6993CS6-4#TRPBF equivalent, key selection criteria include confirmed falling-edge trigger polarity, retrigger capability, NDIV programmability (1–2,097,152), ±2.3% pulse width accuracy for >512µs pulses, and SOT-23 thermal performance (θJA = 192°C/W).

Technical Context

The LTC6993CS6-4#TRPBF implements a master oscillator with 1µs base period, regulated VSET = 1.00V ±30mV, and internal 4-bit A/D converter mapping DIV pin voltage to DIVCODE (0–15) for both NDIV selection and output polarity control. Its digital filter and latch logic ensure clean retriggering on successive falling edges without metastability.

Unlike non-retriggerable variants, LTC6993CS6-4#TRPBF extends output pulse duration indefinitely upon new falling-edge triggers within active period, with minimum inter-trigger interval tRETRIG = 10ns (V+ = 3.3V, NDIV = 1). Pulse width drift is ±0.006%/°C for NDIV ≥ 512 and supply-induced error remains ≤ ±0.9% across 2.25V–5.5V.

Key Specifications

Pinout & Package

Package: 6-Lead Plastic TSOT-23 (1mm height), RoHS-compliant, lead-free finish. Exposed pad not present in S6 package.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6993CS6-4#TRPBF, the IS6-4 and HS6-4 variants retain identical electrical behavior and pin compatibility but extend guaranteed operation to –40°C, enabling deployment in harsher thermal environments without circuit redesign.

Availability

LTC6993CS6-4#TRPBF is available at Aetrix Electronics and suitable for watchdog timer circuits, missing-pulse detection systems, envelope detectors, and high-vibration industrial controls requiring stable component supply across production lifecycles.

Supply support for LTC6993CS6-4#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 LTC6993CS6-4#TRPBF belongs to the TimerBlox family - silicon timing devices designed to replace discrete RC timers and 555-based circuits with superior accuracy, stability, and programmability in space-constrained applications.

FAQ

What is the trigger polarity and retrigger behavior of the LTC6993CS6-4#TRPBF?

The LTC6993CS6-4#TRPBF is configured as a falling-edge-triggered, retriggerable monostable. Each falling edge on the TRIG pin (Pin 1) initiates or extends the output pulse duration by tOUT, provided the new trigger arrives before the prior pulse completes. This behavior is fixed per device variant and cannot be altered by external configuration.

How do I set the pulse width for the LTC6993CS6-4#TRPBF?

Set the pulse width of the LTC6993CS6-4#TRPBF using two components: an RSET resistor from SET (Pin 3) to GND to define tMASTER = (RSET / 50kΩ) × 1µs, and a resistor divider on DIV (Pin 4) to select NDIV (1–2,097,152). The final pulse width is tOUT = NDIV × tMASTER, with accuracy ±2.3% for pulses >512µs.

Does the LTC6993CS6-4#TRPBF require external passive components to operate?

Yes - the LTC6993CS6-4#TRPBF requires at minimum a 0.1µF ceramic capacitor between V+ (Pin 5) and GND (Pin 2) for supply decoupling. To program timing, it needs an RSET resistor (50kΩ–800kΩ) on SET (Pin 3) and a two-resistor divider on DIV (Pin 4). No crystal or inductor is required.

What is the maximum output current drive capability of the LTC6993CS6-4#TRPBF?

The LTC6993CS6-4#TRPBF provides rail-to-rail CMOS output (Pin 6) with ±20mA sourcing/sinking capability at V+ = 2.7V to 5.5V. Output voltage levels are VOH ≥ 4.84V (at –16mA, V+ = 5.5V) and VOL ≤ 0.54V (at 16mA, V+ = 5.5V), enabling direct interface with standard logic families and small actuators.

Can the LTC6993CS6-4#TRPBF generate negative output pulses?

Yes - the LTC6993CS6-4#TRPBF can generate either positive or negative output pulses based on the POL bit derived from DIVCODE. When DIVCODE = 0–7, output is positive (LOW-to-HIGH pulse); when DIVCODE = 8–15, output is negative (HIGH-to-LOW pulse). This is selected solely by the voltage on the DIV pin and requires no additional control signals.