X93155_08 Datasheet, PDF (2/8 Pages) Intersil Corporation – Digitally Controlled Potentiometer(XDCP™)

Block Diagram
V_CC (SUPPLY VOLTAGE)
30kΩ
UP/DOWN
(U/D)
INCREMENT
(INC)
DEVICE SELECT
(CS)
CONTROL
AND
MEMORY
V_SS (Ground)
GENERAL
X93155
U/D
INC
CS
R_H
R_L
V_CC
V_SS
5-BIT
UP/DOWN
COUNTER
5-BIT
NONVOLATILE
MEMORY
STORE AND
CONTROL
RECALL
CIRCUITRY
31
30
29
28
ONE
OF
THIRTY
TWO
DECODER
2
1
0
R_H
TRANSFER RESISTOR
GATES
ARRAY
R_L
DETAILED
Pin Descriptions
MSOP
1
2
3
4
5
6
7
8
SYMBOL
BRIEF DESCRIPTION
INC Increment (INC). 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.
U/D Up/Down (U/D). The U/D input controls the direction of the wiper movement and whether the counter is incremented or
decremented.
R_H
R_H. The R_H and R_L pins of the X93155 are equivalent to the end terminals of a variable resistor.
V_SS
Ground.
NC
No Connection (or can be connected to any voltage between V_SS and V_CC.)
R_L
R_L. The R_H and R_L pins of the X93155 are equivalent to the end terminals of a variable resistor.
CS
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 complete, the X93155
will be placed in the low power standby mode until the device is selected once again.
V_CC Supply Voltage.
2
FN8181.2
February 19, 2008