1FEATURES

• Dual 1:8 Differential Buffer

• Low Additive Jitter <300 fs RMS in

10 kHz to 20 MHz

• Low Within Bank Output Skew of 50 ps (Max)

• Universal Inputs Accept LVDS, LVPECL,

LVCMOS

• One Input Dedicated for Eight Outputs

• Total of 16 LVDS Outputs, ANSI EIA/TIA-644A

Standard Compatible

• Clock Frequency up to 800 MHz

• 2.375–2.625V Device Power Supply

• LVDS Reference Voltage, V AC_REF, Available for

Capacitive Coupled Inputs

• Industrial Temperature Range –40°C to 85°C

• Packaged in 7mm × 7mm 48-Pin QFN (RGZ)

• ESD Protection Exceeds 3 kV HBM, 1 kV CDM

APPLICATIONS

• Telecommunications/Networking

• Medical Imaging

• Test and Measurement Equipment

• Wireless Communications

• General Purpose Clocking

DESCRIPTION

The CDCLVD2108 clock buffer distributes two clock

inputs (IN0, IN1) to a total of 16 pairs of differential

LVDS clock outputs (OUT0, OUT15). Each buffer

block consists of one input and 8 LVDS outputs. The

inputs can either be LVDS, LVPECL, or LVCMOS.

The CDCLVD2108 is specifically designed for driving

50-Ω transmission lines. In case of driving the inputs

in single ended mode, the appropriate bias voltage

(VAC_REF) should be applied to the unused negative

input pin.

Using the control pin (EN) outputs can be either

disabled or enabled. If the EN pin is left open all

outputs are active, if switched to a logical '0' all

outputs are disabled (static logical 0), if switched to a

logical '1', OUT (8..15) are switched off and OUT

(0..7) are active. The part supports a fail safe

function. It incorporates an input hysteresis, which

prevents random oscillation of the outputs in absence

of an input signal.

The device operates in 2.5V supply environment and

is characterized from –40°C to 85°C (ambient

temperature). The CDCLVD2108 is packaged in

small 48-pin, 7-mm x 7-mm QFN package.