CDCLVD2104屬于集成電路（IC）的時鐘緩沖器驅(qū)動器。由美國德州儀器公司制造生產(chǎn)的CDCLVD2104時鐘緩沖器，驅(qū)動器時鐘緩沖器和驅(qū)動器集成電路產(chǎn)品族中的產(chǎn)品用于幫助信號在系統(tǒng)中傳輸，常用作頻率/時間參考信號，以同步系統(tǒng)內(nèi)的活動。盡管這些器件最常用到的功能就是緩沖（即，為使信號不受驅(qū)動負(fù)載的影響而從某個信號源復(fù)制信號），但是該產(chǎn)品族中的某些器件還能執(zhí)行其他功能，例如選擇性改變緩沖信號路徑、按某個整數(shù)值分割信號頻率，或進(jìn)行所用電信號格式轉(zhuǎn)換。

1FEATURES

? Dual 1:4 Differential Buffer

? Low Additive Jitter <300 fs, RMS in

10 kHz to 20 MHz

? Low Within Bank Output Skew of 35ps (Max)

? Universal Inputs Accept LVDS, LVPECL,

LVCMOS

? One Input Dedicated for Four Output Buffers

? 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 CDCLVD2104 clock buffer distributes two clock

inputs (IN0, IN1) to a total of 8 pairs of differential

LVDS clock outputs (OUT0, OUT7). Each buffer block

consists of one input and 4 LVDS outputs. The inputs

can either be LVDS, LVPECL, or LVCMOS.

The CDCLVD2104 is specifically designed for driving

50-Ω transmission lines. If the input is 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 two

buffers with all outputs are enabled, if switched to a

logical 0 both buffers with all outputs are disabled

(static logical “0”), if switched to a logical 1, one

buffer with four outputs is disabled and another buffer

with four outputs is enabled. 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 CDCLVD2104 is packaged in

small 28-pin, 5-mm × 5-mm QFN package.