1 Features
• High-performance 1:2, 1:3 or 1:4 LVCMOS clock
buffer
• Very low output skew < 50 ps
• Extremely low additive jitter < 50 fs maximum
– 7.5 fs typical at VDD = 3.3 V
– 10 fs typical at VDD = 2.5 V
– 19.2 fs typical at VDD = 1.8 V
• Very low propagation delay < 3 ns
• Synchronous output enable
• Supply voltage: 3.3 V, 2.5 V, or 1.8 V
– 3.3-V tolerant input at all supply voltages
– Fail-safe inputs
• fmax = 250 MHz for 3.3 V
fmax = 200 MHz for 2.5 V and 1.8 V
• Operating temperature range: –40°C to 125°C
• Available in 8-pin TSSOP package
• Available in 8-pin WSON package

2 Applications
• Factory automation & control
• Telecommunications equipment
• Data center & enterprise computing
• Grid infrastructure
• Motor drives
• Medical imaging

3 Description
The LMK1C110x is a modular, high-performance, lowskew,
general-purpose clock buffer family from Texas
Instruments. The entire family is designed with a
modular approach in mind. Three different fan-out
variations, 1:2, 1:3, 1:4, are available.
All of the devices within this family are pin-compatible
to each other and backwards compatible to the
CDCLVC110x family for easy handling.
All family members share the same high performing
characteristics such as low additive jitter, low skew,
and wide operating temperature range.
The LMK1C110x supports a synchronous output
enable control (1G) which switches the outputs into
a low state when 1G is low. These devices have a
fail-safe input that prevents oscillation at the outputs
in the absence of an input signal and allows for input
signals before VDD is supplied.
The LMK1C110x family operates in a 1.8-V, 2.5-V and
3.3-V environment and are characterized for operation
from –40°C to 125°C.