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參數(shù)資料
| 型號： | X9C103SIZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | Digitally Controlled Pot (XDCP) |
| 中文描述： | 10K DIGITAL POTENTIOMETER, INCREMENT/DECREMENT CONTROL INTERFACE, 100 POSITIONS, PDSO8 |
| 封裝： | ROHS COMPLIANT, SOIC-8 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 257K |
| 代理商： | X9C103SIZ |
7
FN8222.1
September 19, 2005
DETAILED PIN DESCRIPTIONS
R
H
/V
H
and R
L
/V
L
The high (V
H
/R
H
) and low (V
/R
) terminals of the
X9C102/103/104/503 are equivalent to the fixed termi-
nals of a mechanical potentiometer. The minimum
voltage is -5V and the maximum is +5V. The terminol-
ogy of V
H
/R
H
and V
/R
references the relative position
of the terminal in relation to wiper movement direction
selected by the U/D input and not the voltage potential
on the terminal.
R
W
/V
W
V
W
/R
W
is the wiper terminal, and is equivalent to the
movable terminal of a mechanical potentiometer. The
position of the wiper within the array is determined by
the control inputs. The wiper terminal series resistance is
typically 40
.
Up/Down (U/D)
The U/D input controls the direction of the wiper move-
ment and whether the counter is incremented or dec-
remented.
Increment (INC)
The
INC
input is negative-edge triggered. Toggling
INC will move the wiper and either increment or decre-
ment the counter in the direction indicated by the logic
level on the U/D input.
Chip Select (CS)
The device is selected when the CS input is LOW.
The current counter value is stored in nonvolatile
memory when CS is returned HIGH while the INC
input is also HIGH. After the store operation is com-
plete the X9C102/103/104/503 device will be placed
in the low power standby mode until the device is
selected once again.
PIN CONFIGURATION
PIN NAMES
PRINCIPLES OF OPERATION
There are three sections of the X9Cxxx: the input con-
trol, counter and decode section; the nonvolatile mem-
ory; and the resistor array. The input control section
operates just like an up/down counter. The output of
this counter is decoded to turn on a single electronic
switch connecting a point on the resistor array to the
wiper output. Under the proper conditions the contents
of the counter can be stored in nonvolatile memory
and retained for future use. The resistor array is com-
prised of 99 individual resistors connected in series. At
either end of the array and between each resistor is an
electronic switch that transfers the potential at that
point to the wiper.
The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the
last position. That is, the counter does not wrap
around when clocked to either extreme.
The electronic switches on the device operate in a
“make before break” mode when the wiper changes
tap positions. If the wiper is moved several positions,
multiple taps are connected to the wiper for t
IW
(INC to
V
W
/R
W
change). The R
TOTAL
value for the device can
temporarily be reduced by a significant amount if the
wiper is moved several positions.
When the device is powered-down, the last wiper posi-
tion stored will be maintained in the nonvolatile mem-
ory. When power is restored, the contents of the
memory are recalled and the wiper is set to the value
last stored.
V
CC
CS
V
L
/R
L
V
W
/R
W
INC
U/D
V
SS
1
2
3
4
8
7
6
5
V
H
/R
H
X9C102/103/104/503
DIP/SOIC
Symbol
V
H
/R
H
V
W
/R
W
V
L
/R
L
V
SS
V
CC
U/D
INC
CS
NC
Description
High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage
Up/Down Control Input
Increment Control Input
Chip Select Control Input
No Connection
X9C102, X9C103, X9C104, X9C503
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