LTC6994CS6-1#TRPBF

Overview

The LTC6994CS6-1#TRPBF 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 with a specified operating temperature range of 0°C to 70°C. The device provides a programmable delay range from 1µs to 33.6 seconds, determined by an internal master oscillator and a divider ratio (NDIV) selectable from 1 to 221 via the DIV pin. A single resistor (RSET) connected between the SET pin and ground programs the time base. The LTC6994-1 variant delays either the rising or falling edge based on configuration, featuring a CMOS output driver capable of sourcing and sinking 20mA.

Feature Summary

• Configurable delay functionality allowing selection of rising or falling edge propagation through the POL bit setting.
• Dynamic adjustment capability for delay time via a separate control voltage input at the SET pin.
• Noise discrimination features enable pulse qualification by filtering out signals shorter than the programmed delay duration.
• Low power consumption design suitable for battery-operated applications with supply current as low as 70µA.

Applications

• Noise discriminators and pulse qualifiers for signal conditioning
• Switch debouncing in mechanical interface circuits
• Delay matching for timing synchronization in digital systems

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the CS6 designation corresponds to the commercial temperature grade (0°C to 70°C) and TSOT-23 package. Ensure compatibility with the required delay range and supply voltage specifications for the target application environment before finalizing procurement.

Selection Notes

Select the LTC6994-1 version if only one edge transition requires delaying. Choose the -2 version if both edges must be delayed or output inversion is needed. Use the DIV pin resistor network to set the desired divider ratio and polarity. Ensure RSET tolerance meets accuracy requirements, as delay precision depends heavily on resistor stability and temperature coefficient.

Part Context

This component belongs to the Analog Devices TimerBlox family of versatile silicon timing devices. The LTC6994 series includes variants with different packages and temperature grades, such as DFN and wider industrial automotive options. The CS6-1 suffix specifically identifies the commercial grade TSOT-23 package with single-edge delay capability.

Replacement Considerations

Direct substitutes within the same family include LTC6994IS6-1#TRPBF for extended temperature range or LTC6994HDCB-1#TRPBF for DFN packaging. Verify that any replacement maintains the same logic function (-1 vs -2) and package footprint to ensure board compatibility without redesign.

FAQ

How is the delay time programmed?

The delay time is programmed using a single resistor (RSET) connected between the SET pin and ground, which sets the master oscillator frequency, combined with a divider ratio (NDIV) selected via the DIV pin voltage.

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

The LTC6994-1 delays either the rising or falling edge based on configuration, while the LTC6994-2 delays both transitions and offers an optional output inversion feature.

Can the delay time be adjusted dynamically?

Yes, the device allows dynamic adjustment of the delay time by varying the control voltage or current at the SET pin after start-up.