CDCLVD1208 Datasheet, PDF (1/21 Pages) Texas Instruments – 2:8 Low Additive Jitter LVDS Buffer

CDCLVD1208
www.ti.com
2:8 Low Additive Jitter LVDS Buffer
Check for Samples: CDCLVD1208
SCAS899 – AUGUST 2010
FEATURES
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• 2:8 Differential Buffer
• Low Additive Jitter: <300 fs RMS in
10 kHz to 20 MHz
• Low Output Skew of 45 ps (Max)
• Universal Inputs Accept LVDS, LVPECL,
LVCMOS
• Selectable Clock Inputs through Control Pin
• 8 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 5mm × 5mm 28-Pin QFN (RHD)
• 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 CDCLVD1208 clock buffer distributes one of two
selectable clock inputs (IN0, IN1) to 8 pairs of
differential LVDS clock outputs (OUT0, OUT7)
with minimum skew for clock distribution. The
CDCLVD1208 can accept two clock sources into an
input multiplexer. The inputs can either be LVDS,
LVPECL, or LVCMOS.
The CDCLVD1208 is specifically designed for driving
50 Ω transmission lines. If the input is in single ended
mode, the appropriate bias voltage (V_{AC_REF}) should
be applied to the unused negative input pin.
The IN_SEL pin selects the input which is routed to
the outputs. If this pin is left open it disables the
outputs (static). 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 2.5 V supply environment and
is characterized from –40°C to 85°C (ambient
temperature). The CDCLVD1208 is packaged in
small 28-pin, 5-mm × 5-mm QFN package.
125 MHz
125 MHz
Oscillator
IN_ SEL
CDCLVD1208
LVDS Buffer
PHY2
PHY2
PHY2
PHY2
PHY2
PHY2
PHY 7
FPGA
Figure 1. Application Example
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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