AAT4291IJS-1-T1 AAT [Advanced Analog Technology, Inc.], AAT4291IJS-1-T1 Datasheet - Page 10

• Manufacturer Part Number: AAT4291IJS-1-T1
• Description: I/O Expander Load Switches with Serial Control
• Manufacturer: AAT [Advanced Analog Technology, Inc.]

Output Sequencing
If output sequencing is not necessary, then all of the
outputs will be switched on simultaneously on the
first rising edge of the EN/SET pin. However, if out-
put sequencing is desired, then a series of pulses
on the EN/SET pin will accomplish this. Each time
a new group of pulses is asserted on EN/SET, the
AAT4290/91 internal control is reset. For example,
Timing Diagram
10
EN/SET
OUTn
T
HI
T
LO
I/O Expander Load Switches with Serial Control
T
LAT
T
D(ON)
to sequence the outputs in order from OUT5 to
OUT1, five clocks bursts are input on the EN/SET
pin. From Table 1, the first burst of 16 clocks turns
on OUT5. A following burst of 8 clocks (as the
counter resets) will add OUT4, followed by 4 clocks
to add OUT3, 2 clocks to add OUT2, and 1 clock to
add OUT1. Likewise, the outputs can be turned off
in any order by adding more clock bursts.
T
R
T
O
AAT4290/91
T
D(OFF)
4290.2006.03.1.2