Datasheet

PIN NAME FUNCTION
1 CSA Active-Low Register A Chip-Select Input. Drive CSA low to change wiper position WA through INCA and UDA.
2 UDA
Register A Up/Down Control Input. With UDA low, a high-to-low transition at INCA decrements the WA position
towards LA. With UDA high, a high-to-low transition at INCA increments WA position toward HA.
3 UDB
Register B Up/Down Control Input. With UDB low, a high-to-low transition at INCB decrements the WB position
towards LB. With UDB high, a high-to-low transition at INCB increments WB position toward HB.
4 V
DD
Power-Supply Input. Bypass V
DD
to GND with a 0.1µF capacitor close to the device.
5 WA Resistor A Wiper Terminal
6 HA
Resistor A High Terminal. The voltage at HA can be higher or lower than the voltage at LA. Current can ow into
or out of HA.
7 LA
Resistor A Low Terminal. The voltage at LA can be higher or lower than the voltage at HA. Current can ow into
or out of LA.
8 LB
Resistor B Low Terminal. The voltage at LB can be higher or lower than the voltage at HB. Current can ow into
or out of LB.
9 HB
Resistor B High Terminal. The voltage at HB can be higher or lower than the voltage at LB. Current can ow
into or out of HB.
10 WB Resistor B Wiper Terminal
11 GND Ground
12 INCB
Register B Wiper Increment Control Input. With UDB low, a high-to-low transition at INCB decrements the WB
position towards LB. With UDB high, a high-to-low transition at INCB increments WB position toward HB.
13 INCA
Register A Wiper Increment Control Input. With UDA low, a high-to-low transition at INCA decrements the WA
position towards LA. With UDA high, a high-to-low transition at INCA increments WA position toward HA.
14 CSB Active-Low Register B Chip-Select Input. Drive CSB low to change wiper position WA through INCB and UDB.
INCB
GNDV
DD
1
+
2
14
13
CSB
INCAUDA
UDB
CSA
TOP VIEW
3
4
12
11
HB
LBLA
5 10 WBWA
HA 6
7
9
8
MAX5389
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometer
www.maximintegrated.com
Maxim Integrated │ 8
Pin Description
Pin Conguration
Pin Description
Pin Conguration