X9319US8IZ Intersil, X9319US8IZ Datasheet - Page 7

• Manufacturer Part Number: X9319US8IZ
• Description: IC POT DGTL 50K OHM 8-SOIC
• Manufacturer: Intersil
• Series: XDCP™r

Specifications of X9319US8IZ

• Taps: 100
• Resistance (ohms): 50K
• Number Of Circuits: 1
• Temperature Coefficient: 300 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: Up/Down (3-Wire)
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Resistance In Ohms: 50K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

INSTRUCTIONS AND PROGRAMMING
The INC, U/D and CS inputs control the movement of
the wiper along the resistor array. With CS set LOW
the device is selected and enabled to respond to the
U/D and INC inputs. HIGH to LOW transitions on INC
will increment or decrement (depending on the state of
the U/D input) the seven bit counter. The output of this
counter is decoded to select one of one hundred wiper
positions along the resistive array.
The value of the counter is stored in nonvolatile mem-
ory whenever CS transitions HIGH while the INC input
is also HIGH.
The system may select the X9319, move the wiper
and deselect the device without having to store the lat-
est wiper position in nonvolatile memory. After the
wiper movement is performed as described above and
once the new position is reached, the system must
keep INC LOW while taking CS HIGH. The new wiper
position will be maintained until changed by the sys-
tem or until a powerup/down cycle recalled the previ-
ously stored data. This procedure allows the system to
always power-up to a preset value stored in nonvola-
tile memory; then during system operation minor
adjustments could be made. The adjustments might
be based on user preference, system parameter
changes due to temperature drift, etc.
The state of U/D may be changed while CS remains
LOW. This allows the host system to enable the
device and then move the wiper up and down until the
proper trim is attained.
7
X9319
MODE SELECTION
CS
H
L
L
INC
H
X
L
L
L
U/D
H
X
X
X
H
L
L
Wiper up
Wiper down
Store wiper position to
nonvolatile memory
Standby
No store, return to standby
Wiper Up (not recommended)
Wiper Down
(not recommended)
Mode
September 26, 2006
FN8185.2