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ZL40220LDG1

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
ZL40220 Data Sheet
7
Microsemi Corporation
3.2 Clock Input Termination
The ZL40220 is adaptable to support different types of differential and singled-ened input signals depending on the
passive components used in the input termination. The application diagrams in the following figures allow the
ZL40220 to accept LVPECL, LVDS, CML, HCSL and single-ended inputs.
VDD_driver
R2 R2
R1 R1
VDD_driver
VDD
VDD_driver=3.3V: R1=127 ohm, R2=82 ohm
VDD_driver=2.5V: R1=250 ohm, R2=62.5 ohm
ZL40220
clk_p
clk_n
Z
o
= 50 Ohms
Z
o
= 50 Ohms
LVPECL
Driver
22 Ohms
22 Ohms
Figure 4 - LVPECL Input DC Coupled Thevenin Equivalent
50
Ohms
50
Ohms
VDD_driver
VDD
VDD_driver=3.3V: R1 = 50 ohm
VDD_driver=2.5V: R1 = 20 ohm
ZL40220
clk_p
clk_n
Z
o
= 50 Ohms
Z
o
= 50 Ohms
R1
LVPECL
Driver
22 Ohms
22 Ohms
Figure 5 - LVPECL Input DC Coupled Parallel Termination
RR
VDD_driver
VDD
VDD_driver=3.3V: R = 143 ohm
VDD_driver=2.5V: R = 82 ohm
ZL40220
clk_p
clk_n
Z
o
= 50 Ohms
Z
o
= 50 Ohms
LVPECL
Driver
VDD
2 K
Ohm
2 K
Ohm
2 K
Ohm
2 K
Ohm
100 nF
100 nF
Figure 6 - LVPECL Input AC Coupled Termination
Z
o
= 50 Ohms
VDD_driver
VDD
ZL40220
clk_p
clk_n
Z
o
= 50 Ohms
100
Ohms
LVDS
Driver
Figure 7 - LVDS Input DC Coupled
ZL40220 Data Sheet
8
Microsemi Corporation
VDD
2 K
Ohm
VDD_driver
VDD
ZL40220
clk_p
clk_n
Z
o
= 50 Ohms
Z
o
= 50 Ohms
2 K
Ohm
2 K
Ohm
2 K
Ohm
100 Ohm
LVDS
Driver
100 nF
100 nF
Figure 8 - LVDS Input AC Coupled
Figure 9 - CML Input AC Coupled
ZL40220 Data Sheet
9
Microsemi Corporation
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23

ZL40220LDG1

Mfr. #:
Buy ZL40220LDG1
Manufacturer:
Microchip / Microsemi
Description:
Clock Buffer 2:6 LVDS Fanout Buffer w/Ext. Term.
Lifecycle:
New from this manufacturer.
Delivery:
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