LMK1C1103PWR

Clock Buffers, Drivers Overview

The LMK1C1103PWR is a 1:3 LVCMOS fan-out clock buffer from Texas Instruments, housed in an 8-pin TSSOP package. It operates at supply voltages of 1.8 V, 2.5 V, or 3.3 V, supporting maximum input and output frequencies of 250 MHz at 3.3 V and 200 MHz at lower voltages. The device features extremely low additive jitter (maximum 50 fs) and very low propagation delay (less than 3 ns). It includes synchronous output enable control via the 1G pin and fail-safe inputs to prevent oscillation without an input signal.

Clock Buffers, Drivers Feature Summary

• Provides 1:3 LVCMOS fan-out with outputs Y0, Y1, and Y2.
• Extremely low additive jitter of less than 50 fs maximum.
• Very low output skew of less than 50 ps.
• Fail-safe inputs allow driving before VDD is applied.

Clock Buffers, Drivers Applications

• Factory automation & control
• Telecommunications equipment
• Data center & enterprise computing

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-8 package and tape-and-reel carrier format. Confirm RoHS compliance and lead finish details against the manufacturer's current orderable addendum, as packaging quantities and material specifications may be subject to revision.

Clock Buffers, Drivers Selection Notes

Select this component when a single-ended LVCMOS clock source requires distribution to three distinct loads. Ensure the system power supply voltage matches the required frequency limits (250 MHz for 3.3 V; 200 MHz for 1.8 V/2.5 V). Verify that the 8-pin TSSOP footprint aligns with the PCB layout constraints.

Clock Buffers, Drivers Part Context

This part belongs to the LMK1C110x family, which also includes 1:2 (LMK1C1102) and 1:4 (LMK1C1104) variants. All family members are pin-compatible and share similar electrical characteristics, allowing for modular design flexibility within the same footprint.

Clock Buffers, Drivers Replacement Considerations

LMK1C1102PWR (1:2 fan-out)

Clock Buffers, Drivers FAQ

What is the function of the 1G pin?

The 1G pin serves as a global synchronous output enable. Driving it high enables the outputs, while driving it low disables them by switching the outputs into a low state.

How does the device handle missing input signals?

The device incorporates fail-safe inputs that prevent random oscillation at the outputs when no input signal is present, ensuring stable operation even if the CLKIN pin is left open.

Can unused outputs be left unconnected?

Yes, unused outputs can be left floating to reduce overall system component cost without affecting the functionality of active outputs.