X9C102, X9C103, X9C104, X9C503
Pin Descriptions
PIN
NUMBER
PIN NAME
DESCRIPTION
1
INC
INCREMENT The INC input is negative-edge triggered. Toggling INC will move the wiper and either increment or
decrement the counter in the direction indicated by the logic level on the U/D input.
2
3
U/D
UP/DOWN The U/D input controls the direction of the wiper movement and whether the counter is incremented or
decremented.
VH/RH
VH/RH The high (VH/RH) terminals of the X9C102, X9C103, X9C104, X9C503 are equivalent to the fixed terminals of
a mechanical potentiometer. The minimum voltage is -5V and the maximum is +5V. The terminology of VH/RH and VL/RL
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.
4
5
VSS
VSS
VW/RW
VW/RW VW/RW 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
40Ω.
6
RL/VL
RL/VL The low (VL/RL) terminals of the X9C102, X9C103, X9C104, X9C503 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is -5V and the maximum is +5V. The terminology of VH/RH and VL/RL
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.
7
8
CS
CS The device is selected when the CS input is LOW. The current counter value is stored in non-volatile memory when
CS is returned HIGH while the INC input is also HIGH. After the store operation is complete the X9C102, X9C103,
X9C104, X9C503 device will be placed in the low power standby mode until the device is selected once again.
VCC
VCC
FN8222.3
July 20, 2009
3
INTERSIL [ Intersil ]
