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The NB4N121K is a Clock differential input fanout distribution 1 to 21 HCSL level differential outputs, optimized for ultra low propagation delay variation. The NB4N121K is designed with HCSL clock distribution for FBDIMM applications in mind. Inputs can accept differential LVPECL, CML, or LVDS levels. Single-ended LVPECL, CML, LVCMOS or LVTTL levels are accepted with the proper VREFAC supply. Clock input pins incorporate an internal 50 Ω on die termination resistors. Output drive current at IREF for 1X load is selected by connecting to GND. To drive a 2X load, connect IREF to VCC. The NB4N121K specifically guarantees low output–to–output skews. Optimal design, layout, and processing minimize skew within a device and from device to device. System designers can take advantage of the NB4N121K's performance to distribute low skew clocks across the backplane or the motherboard.

Features:

Typical Input Clock Frequency 100, 133, 166, 200, 266, 333 and 400 MHz

340 ps Typical Rise and Fall Times

800 ps Typical Propagation Delay

tpd 100 ps Maximum Propagation Delay Variation Per Each Differential Pair

Additive Phase RMS Jitter: 1 ps Max

Operating Range: VCC = 3.0 V to 3.6 V with VEE = 0 V

Differential HCSL Output Level (700 mV Peak-to-Peak)

Pb-Free Packages are Available

Dimensions	8 x 8 x 0.95 mm
Height	0.037" (0.95mm)
Length	0.314" (8mm)
Logic Function	Clock Driver
Mounting Type	Surface Mount
Number of Clock Inputs	1
Number of Pins	52
Operating Voltage Range	3 to 3.6 V
Operation Mode	Differential, Single Ended
Package Type	QFN
Temperature, Operating, Maximum	+85 °C
Temperature, Operating, Minimum	-40 °C
Temperature, Operating, Range	-40 to +85 °C
Width	0.315" (8mm)
关键词

Dimensions 8 x 8 x 0.95 mm  ON Semiconductor Dimensions 8 x 8 x 0.95 mm  Clock Drivers Dimensions 8 x 8 x 0.95 mm  ON Semiconductor Clock Drivers Dimensions 8 x 8 x 0.95 mm   Height 0.037" (0.95mm)  ON Semiconductor Height 0.037" (0.95mm)  Clock Drivers Height 0.037" (0.95mm)  ON Semiconductor Clock Drivers Height 0.037" (0.95mm)   Length 0.314" (8mm)  ON Semiconductor Length 0.314" (8mm)  Clock Drivers Length 0.314" (8mm)  ON Semiconductor Clock Drivers Length 0.314" (8mm)   Logic Function Clock Driver  ON Semiconductor Logic Function Clock Driver  Clock Drivers Logic Function Clock Driver  ON Semiconductor Clock Drivers Logic Function Clock Driver   Mounting Type Surface Mount  ON Semiconductor Mounting Type Surface Mount  Clock Drivers Mounting Type Surface Mount  ON Semiconductor Clock Drivers Mounting Type Surface Mount   Number of Clock Inputs 1  ON Semiconductor Number of Clock Inputs 1  Clock Drivers Number of Clock Inputs 1  ON Semiconductor Clock Drivers Number of Clock Inputs 1   Number of Pins 52  ON Semiconductor Number of Pins 52  Clock Drivers Number of Pins 52  ON Semiconductor Clock Drivers Number of Pins 52   Operating Voltage Range 3 to 3.6 V  ON Semiconductor Operating Voltage Range 3 to 3.6 V  Clock Drivers Operating Voltage Range 3 to 3.6 V  ON Semiconductor Clock Drivers Operating Voltage Range 3 to 3.6 V   Operation Mode Differential, Single Ended  ON Semiconductor Operation Mode Differential, Single Ended  Clock Drivers Operation Mode Differential, Single Ended  ON Semiconductor Clock Drivers Operation Mode Differential, Single Ended   Package Type QFN  ON Semiconductor Package Type QFN  Clock Drivers Package Type QFN  ON Semiconductor Clock Drivers Package Type QFN   Temperature, Operating, Maximum +85 °C  ON Semiconductor Temperature, Operating, Maximum +85 °C  Clock Drivers Temperature, Operating, Maximum +85 °C  ON Semiconductor Clock Drivers Temperature, Operating, Maximum +85 °C   Temperature, Operating, Minimum -40 °C  ON Semiconductor Temperature, Operating, Minimum -40 °C  Clock Drivers Temperature, Operating, Minimum -40 °C  ON Semiconductor Clock Drivers Temperature, Operating, Minimum -40 °C   Temperature, Operating, Range -40 to +85 °C  ON Semiconductor Temperature, Operating, Range -40 to +85 °C  Clock Drivers Temperature, Operating, Range -40 to +85 °C  ON Semiconductor Clock Drivers Temperature, Operating, Range -40 to +85 °C   Width 0.315" (8mm)  ON Semiconductor Width 0.315" (8mm)  Clock Drivers Width 0.315" (8mm)  ON Semiconductor Clock Drivers Width 0.315" (8mm)