1 Features
1• AEC-Q100 qualified with the following results:
– Device temperature grade 1: –40°C to +125°C,
TA
• Four LVCMOS/LVTTL outputs supporting 1.5-V to
3.3-V levels
– Additive jitter: 0.1-ps RMS (typical) at 40 MHz
– Noise floor: –168 dBc/Hz (typical) at 40 MHz
– Output frequency: 350 MHz (maximum)
– Output skew: 35 ps (maximum)
– Part-to-part skew: 550 ps (maximum)
• Two selectable inputs
– CLK_P, CLK_N pair accepts LVPECL, LVDS,
HCSL, SSTL, LVHSTL, or LVCMOS/LVTTL
– LVCMOS_CLK accepts LVCMOS/LVTTL
• Synchronous clock enable
• Core/output power supplies:
– 3.3 V/3.3 V
– 3.3 V/2.5 V
– 3.3 V/1.8 V
– 3.3 V/1.5 V
• Package: 16-pin VQFN

2 Applications
• Advanced Driver Assistance Systems (ADAS)
– Forward-facing long range radar
– Medium/short range radar
– Ultra short range radar

3 Description
The LMK00804B-Q1 is a high-performance clock fanout
buffer and level translator that can distribute up to
four LVCMOS/LVTTL outputs (3.3-V, 2.5-V, 1.8-V, or
1.5-V levels) from one of two selectable inputs that
can accept differential or single-ended inputs. The
clock enable input is synchronized internally to
eliminate runt or glitch pulses on the outputs when
the clock enable terminal is asserted or deasserted.
The outputs are held in logic low state when the clock
is disabled. The LMK00804B-Q1 can also distribute a
low-jitter clock across four transceivers and can
improve the overall target detection and resolution in
a cascaded mmWave radar system.