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SI53312 Folha de dados(PDF) 11 Page - Silicon Laboratories

Nome de Peças SI53312
Descrição Electrónicos  1:10 LOW JITTER UNIVERSAL BUFFER/LEVEL TRANSLATOR WITH 2:1 INPUT MUX
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Fabricante Electrônico  SILABS [Silicon Laboratories]
Página de início  http://www.silabs.com
Logo SILABS - Silicon Laboratories

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Si53312
Rev. 1.0
11
2. Functional Description
The Si53312 is a low jitter, low skew 1:10 differential buffer with an integrated 2:1 input mux. The device has a
universal input that accepts most common differential or LVCMOS input signals. A clock select pin is used to select
the active input clock. The selected clock input is routed to two independent banks of outputs. Each output bank
features control pins to select signal format, output enable, output divider setting and LVCMOS drive strength.
2.1. Universal, Any-Format Input
The Si53312 has a universal input stage that enables simple interfacing to a wide variety of clock formats, including
LVPECL, LVCMOS, LVDS, HCSL, and CML. Tables 15 and 16 summarize the various input ac- and dc-coupling
options supported by the device. Figures 3 and 4 show the recommended input clock termination options.
Figure 2. Differential LVPECL, LVDS, CML AC-Coupled Input Termination
Figure 3. LVCMOS DC-Coupled Input Termination
Table 15. LVPECL, LVCMOS, and LVDS
LVPECL
LVCMOS
LVDS
AC-Couple
DC-Couple
AC-Couple
DC-Couple
AC-Couple
DC-Couple
1.8 V
N/A
N/A
No
No
Yes
No
2.5/3.3 V
Yes
Yes
No
Yes
Yes
Yes
Table 16. HCSL and CML
HCSL
CML
AC-Couple
DC-Couple
AC-Couple
DC-Couple
1.8 V
No
No
Yes
No
2.5/3.3 V
Yes
Yes (3.3 V)
Yes
No
Si53312
0.1 µF
0.1 µF
CLKx
/CLKx
100
VDD
Si53312
VDD
1 k
CMOS
Driver
VTERM = VDD/2
CLKx
= 3. 3 V or2. 5 V
VDDO
CLKx
50
Rs
1 k
VREF


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