AT16244F 데이터 시트보기 (PDF) - Atmel Corporation
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AT16244F Datasheet PDF : 6 Pages
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IOL Pull Down Current
160
120
80
40
0
-40
Time
Ground Bounce for
High to Low Transitions(1)
4.0
3.5
IOL
3.0
Output, V
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
Supply Bounce for
Low to High Transitions(2)
3.5
gnd - measured on
3.0
output with input
held constant
2.5
2.0
output
1.5
1.0
0.5
VOLP
0.0
VOLV
-0.5
Time
4.5
4
3.5
VOHV
3
2.5
2
1.5
1
0.5
0
VOHP
Time
vcc -
measured on
output with
input held
constant
output
Typical Values
Parameter
Value
Units
VOLP
0.4
V
VOLV
-0.26
V
VOHV
VCC - 0.13
V
Note:
VOHP
VCC + 0.6
V
1. When multiple outputs are switched at the same time, rapidly changing current on the ground and VCC paths causes a
voltage to develop across the parasitic inductance of the wire bond and package pins. This occurrence is called
simultaneous switching noise. Atmel’s AT16244 products have minimized this phenomenon as shown on the graph.
Output data is for 15 outputs switching simultaneously at a frequency of 1 MHz. The ground data is measured on the one
remaining output, which is set to logic low and will reflect any device ground movement.
2. As on the graph for Ground Bounce, a similar condition occurs for low to high transitions. Output data is for 15 outputs
switching simultaneously at a frequency of 1 MHz. VCC droop is measured on the one remaining output pin, which is set
to a logic high. This output will reflect any movement on the device VCC.
5-6
AT16244
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