LMK1D2102集成电路（IC）的时钟缓冲器驱动器规格书PDF中文资料

LMK1D2102属于集成电路（IC）的时钟缓冲器驱动器。由德州仪器制造生产的LMK1D2102时钟缓冲器，驱动器时钟缓冲器和驱动器集成电路产品族中的产品用于帮助信号在系统中传输，常用作频率/时间参考信号，以同步系统内的活动。尽管这些器件最常用到的功能就是缓冲（即，为使信号不受驱动负载的影响而从某个信号源复制信号），但是该产品族中的某些器件还能执行其他功能，例如选择性改变缓冲信号路径、按某个整数值分割信号频率，或进行所用电信号格式转换。

1 Features

• High-performance LVDS clock buffer family: up to

2 GHz

– Dual 1:2 differential buffer

– Dual 1:4 differential buffer

• Supply voltage: 1.71 V to 3.465 V

• Fail-safe input operation

• Low additive jitter: < max 60 fs RMS in 12-kHz to

20-MHz @ 156.25 MHz

– Very low phase noise floor: -164 dBc/Hz

(typical)

• Very low propagation delay < 575 ps max

• Output skew of 20 ps max

• Universal inputs accept LVDS, LVPECL, LVCMOS,

HCSL and CML signal levels.

• LVDS reference voltage, VAC_REF, available for

capacitive coupled inputs

• Industrial temperature range: –40°C to 105°C

• Packaged in

– LMK1D2102: 3-mm x 3-mm, 16-Pin VQFN

– LMK1D2104: 5-mm x 5-mm, 28-Pin VQFN

2 Applications

• Telecommunications and networking

• Medical imaging

• Test and measurement

• Wireless infrastructure

• Pro audio, video and signage

3 Description

The LMK1D210x clock buffer distributes two clock

inputs (IN0 and IN1) to a total of up to 8 pairs of

differential LVDS clock outputs (OUT0, OUT7) with

minimum skew for clock distribution. Each buffer block

consists of one input and up to 4 LVDS outputs. The

inputs can either be LVDS, LVPECL, HCSL, CML or

LVCMOS.

The LMK1D210x is specifically designed for driving

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

in single-ended mode, the appropriate bias voltage as

shown in Figure 9-6 must be applied to the unused

negative input pin.

Using the control pin (EN), output banks can either

be enabled or disabled. If this pin is left open, two

buffers with all outputs are enabled, if switched to

a logic 0, both banks with all outputs are disabled

(static logic 0), if switched to a logic 1, one bank

and its outputs are disabled while another bank with

its outputs are enabled. The part supports a fail-safe

function. The device further incorporates an input

hysteresis which prevents random oscillation of the

outputs in the absence of an input signal.

The device operates in 1.8-V or 2.5-V or 3.3-V

supply environment and is characterized from –40°C

to 105°C (ambient temperature). The LMK1D210x

package variant is shown in the table below: