AT16646F Datasheet, PDF (4/6 Pages) ATMEL Corporation – AT16646 Fast Logic 16-Bit Tri-State Register

IOL Pull Down Current
160
120
80
40
0
-40
Time
4.0
3.5
I_OL
3.0
Output, V
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
Ground Bounce for
High to Low Transitions⁽¹⁾
3.5
3.0
2.5
2.0
1.5
1.0
0.5
VOLP
0.0
VOLV
-0.5
Time
gnd - measured on
output with input
held constant
output
Supply Bounce for
Low to High Transitions⁽²⁾
4.5
4
VOHP
3.5
VOHV
3
2.5
2
1.5
1
0.5
0
Time
vcc -
measured on
output with
input held
constant
output
Typical Values
Note:
Parameter
Value
Units
V_OLP
0.4
V
V_OLV
-0.26
V
VOHV
VCC - 0.13
V
VOHP
VCC + 0.6
V
1. When multiple outputs are switched at the same time, rapidly changing current on the ground and V_CC path 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 AT16646 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. V_CC 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 V_CC.
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AT16646