78
Features
• Reduce system size
• Low assembly cost
• Higher component and system reliability
• Suitable for applications of mobile phones, receivers,
battery chargers, palmtop computers and tablets
Derating curve Construction Schematics
Maximum dissipation (P) in percent-
age of rated power as a function of the
operating ambient temperature (T
amb
).
100
80
60
40
20
-55 -40 -20 0 20 40 60 80
70
100 120 140 160
Ambient Temperature (
C)
Rated Power (%)
125
1 3
2 4
attenuated
output signal
The rectangular marker designates input pin 1
1 3
R2R2
R1
2 4
ATV 321
Dimensions
P
B
T
D
A
unit: mm
Type L W T A B P D
ATV321 1.00 ±0.10 1.00 ±0.10 0.35 ±0.05 0.33 ±0.10 0.15 ±0.10 0.65 ±0.10 0.25 ±0.10
Chip Resistors Selection Charts
AT - RF attenuator chip resistors, 0404
