LTC6994HS6-2#TRMPBF

Overview

The LTC6994HS6-2#TRMPBF is a programmable delay block from the TimerBlox family, housed in a 6-lead Plastic TSOT-23 package. It operates on a single supply voltage ranging from 2.25V to 5.5V and supports an operating temperature range of -40°C to 125°C. The device provides a programmable delay range from 1µs to 33.6 seconds, configured via a master oscillator set by RSET and a divider N_DIV. It features a CMOS output driver capable of sourcing and sinking 20mA, with a typical supply current of 70µA at a 10µs delay.

Feature Summary

• Configurable delay functionality for rising or falling edges using a single resistor for time base programming
• Dynamic adjustment capability allowing real-time modification of delay duration through control voltage inputs
• Integrated noise discrimination logic that filters short pulses and qualifies signals based on programmed timing thresholds

Applications

• Noise discriminators and pulse qualifiers for signal conditioning
• Switch debouncing circuits in mechanical interface applications
• Delay matching systems requiring precise temporal alignment
• Portable and battery-powered equipment utilizing low power consumption modes

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm the suffix indicates automotive qualification status if required for specific reliability standards. Ensure the package type matches the design footprint requirements before finalizing procurement orders.

Selection Notes

Select the LTC6994HS6-2 variant when both rising and falling edge delays are required simultaneously. Choose this part over the -1 version if output inversion options are needed within the same delay block configuration. Verify that the thermal performance of the TSOT-23 package meets the system's heat dissipation constraints under maximum load conditions.

Part Context

This component belongs to the Analog Devices TimerBlox family of versatile silicon timing devices. It shares architectural similarities with other members like the LTC6993 and LTC6992 but is specifically optimized for delay line and debouncer applications rather than monostable generation or PWM control.

Replacement Considerations

Direct replacements include the LTC6994IS6-2#TRMPBF for commercial temperature ranges and the LTC6994MPS6-2#TRMPBF for extended military-grade temperatures. Automotive qualified versions such as the LTC6994HS6-2#WTRMPBF offer controlled manufacturing processes for higher reliability requirements.

FAQ

How is the delay time programmed on the LTC6994HS6-2?

The delay time is determined by a master oscillator frequency set by a single resistor (RSET) connected between the SET pin and ground, combined with an internal clock divider (N_DIV) selected via the DIV pin voltage.

What is the difference between the LTC6994-1 and LTC6994-2 versions?

The LTC6994-1 delays either the rising or falling edge based on configuration, while the LTC6994-2 delays both transitions and adds the option to invert the output signal.

Can the delay time be adjusted dynamically after startup?

Yes, the device allows dynamic adjustment of the delay time via a separate control voltage applied to the DIV pin, which changes the internal divider setting.