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NZF220TT1
ELECTRICAL CHARACTERISTICS
Characteristic
Zener Breakdown Voltage, @ I ZT = 1 mA
Zener Leakage Current, @ V R = 3 V
Zener Forward Voltage, @ I F = 50 mA
Zener Internal Capacitance, @ 0 V Bias
Zener/Resistor Array Line Capacitance
Resistance
Cutoff Frequency
Symbol
V Z
I r
V F
C
C
R
F C (Note 2)
Min
6.0
N/A
N/A
7.0
17.6
90
?
Typ
?
?
?
?
?
?
220
Max
8.0
1.0
1.25
10
26.4
110
?
Unit
V
m A
V
pF
pF
W
MHz
2. 50 W Source and 50 W Lead Termination per Figure 2
Applications Information
Suppressing Noise at the Source
? Filter all I/O signals leaving the noisy environment
? Locate I/O driver circuits close to the connector
? Use the longest rise/fall times possible for all digital signals
Reducing Noise at the Receiver
? Filter all I/O signals entering the unit
? Locate the I/O filters as close as possible to the connector
Minimizing Noise Coupling
?
?
?
?
?
Use multilayer PCBs to minimize power and ground inductance
Keep clock circuits away from the I/O connector
Ground planes should be used whenever possible
Minimize the loop area for all high speed signals
Provide for adequate power decoupling
ESD Protection
? Locate the suppression devices as close to the I/O connector as possible
? Minimize the PCB trace length to the suppression device
? Minimize the PCB trace length for the ground return for the suppression device
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