LMK1D1204集成电路（IC）的时钟缓冲器驱动器规格书PDF中文资料

LMK1D1204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LMK1D1204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

– 2:12 differential buffer (LMK1D1212)

– 2:16 differential buffer (LMK1D1216)

• Supply voltage: 1.71 V to 3.465 V

• Low additive jitter: < 60 fs RMS maximum in 12-

kHz to

20-MHz at 156.25 MHz

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

(typical)

• Very low propagation delay: < 575 ps maximum

• Output skew: 20 ps maximum

• High-swing LVDS (boosted mode): 500-mV VOD

typical when AMP_SEL = 1

• 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

– LMK1D1212: 6-mm × 6-mm, 40-pin VQFN

(RHA)

– LMK1D1216: 7-mm × 7-mm, 48-pin VQFN

(RGZ)

2 Applications

• Telecommunications and networking

• Medical imaging

• Test and measurement

• Wireless infrastructure

• Pro audio, video and signage

3 Description

The LMK1D1212 clock buffer distributes with

minimum skew one of two selectable clock inputs

(IN0, IN1) to 12 pairs of differential LVDS clock

outputs (OUT0 through OUT11). Similarly, the

LMK1D1216 distributes 16 pairs of differential

LVDS clock outputs (OUT0 through OUT15). The

LMK1D121x family can accept two clock sources into

an input multiplexer. The inputs can either be LVDS,

LVPECL, LP-HCSL, HCSL, CML, or LVCMOS.

The LMK1D121x is specifically designed for driving

50-Ω transmission lines. When driving inputs in

single-ended mode, apply the appropriate bias

voltage to the unused negative input pin (see Figure

9-6).

The IN_SEL pin selects the input which is routed

to the outputs. If this pin is left open, it disables

the outputs (static low). 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).