General Description

The 8SLVP1208 is a high-performance differential LVPECL fanout

buffer. The device is designed for the fanout of high-frequency, very

low additive phase-noise clock and data signals. The 8SLVP1208 is

characterized to operate from a 3.3V and 2.5V power supply.

Guaranteed output-to-output and part-to-part skew characteristics

make the 8SLVP1208 ideal for those clock distribution applications

demanding well-defined performance and repeatability. Two

selectable differential inputs and eight low skew outputs are

available. The integrated bias voltage generators enables easy

interfacing of single-ended signals to the device inputs. The device is

optimized for low power consumption and low additive phase noise.

Features

• Eight low skew, low additive jitter LVPECL output pairs

• Two selectable, differential clock input pairs

• Differential pairs can accept the following differential input

levels: LVDS, LVPECL, CML

• Maximum input clock frequency: 2GHz

• LVCMOS interface levels for the control input (input select)

• Output skew: 28ps (typical)

• Propagation delay: 410ps (maximum)

• Low additive phase jitter, RMS: 54.1fs (maximum)

(fREF = 156.25MHz, VPP = 1V, 12kHz–20MHz)

• Full 3.3V and 2.5V supply voltage

• Maximum device current consumption (IEE): 141mA

• Available in lead-free (RoHS 6), 28-Lead VFQFPN package

• -40°C to 85°C ambient operating temperature

• Supports case temperature ≤ 105°C operations

• Differential PCLK0, nPCLK0 and PCLK1, nPCLK1 pairs can also

accept single-ended LVCMOS levels. See Applications section

Wiring the Differential Input to Accept Single-Ended Levels

(Figure 1A and Figure 1B)

• Supports PCI Express Gen1–5