-40

0

40

80

120

160

Time

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

I

OL

Output, V

IOL Pull Down Current

3.5

Time

VOLV

VOLP

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

gnd - measured on

output with input

held constant

output

Ground Bounce for

High to Low Transitions

(1)

VOHP

VOHV

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

Time

vcc -

measured on

output with

input held

constant

output

Supply Bounce for

Low to High Transitions

(2)

Parameter

Value

Units

0.4

V

-0.26

V

V

V

Note:

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

Typical Values

5-6

AT16244