X9313
AC Operating Characteristics
Over recommended operating conditions unless otherwise stated.
LIMITS
SYMBOL
t
CI
t
ID
t
DI
t
IL
t
IH
t
IC
t
CPH
t
CPH
t
IW
t
CYC
t
R
, t
F
(Note 7)
t
PU
(Note 7)
t
R
V
CC
(Note 7)
t
WR
NOTES:
6. Typical values are for T
A
= 25°C and nominal supply voltage.
7. This parameter is not 100% tested.
CS to INC setup
INC HIGH to U/D change
U/D to INC setup
INC LOW period
INC HIGH period
INC inactive to CS inactive
CS deselect time (STORE)
CS deselect time (NO STORE)
INC to V
W
change
INC cycle time
INC input rise and fall time
Power-up to wiper stable
V
CC
power-up rate
Store cycle
0.2
5
4
500
5
50
10
PARAMETER
MIN
100
100
2.9
1
1
1
20
100
1
5
TYP
(Note 6)
MAX
UNIT
ns
ns
µs
µs
µs
µs
ms
ns
µs
µs
µs
µs
V/ms
ms
Power-Up and -Down Requirements
The recommended power-up sequence is to apply V
CC
/V
SS
first, then the potentiometer voltages. During power-up, the
data sheet parameters for the DCP do not fully apply until 1
millisecond after V
CC
reaches its final value. The V
CC
ramp
spec is always in effect. In order to prevent unwanted tap
position changes, or an inadvertent store, bring the CS and
INC high before or concurrently with the V
CC
pin on power-
up.
AC Timing
CS
t
CYC
t
CI
INC
t
IL
t
IH
t
IC
t
CPH
90%
10%
t
ID
U/D
t
DI
t
F
t
R
90%
t
IW
MI
V
W
NOTE:
MI IN THE AC TIMING DIAGRAM REFERS TO THE MINIMUM INCREMENTAL CHANGE IN THE V
W
OUTPUT DUE TO A CHANGE IN THE WIPER POSITION.
(SEE NOTE)
8
FN8177.2
September 9, 2005
INTERSIL [ INTERSIL CORPORATION ]
