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© Semiconductor Components Industries, LLC, 2012
May, 2012 − Rev. 14
1 Publication Order Number:
CAT5409/D
CAT5409
Quad Digitally Program-
mable Potentiometers (DPP)
with 64 Taps and I
2
C
Interface
Description
The CAT5409 is four Digitally Programmable Potentiometers
(DPP) integrated with control logic and 16 bytes of NVRAM memory.
A separate 6−bit control register (WCR) independently controls the
wiper tap position for each DPP. Associated with each wiper control
register are four 6−bit non−volatile memory data registers (DR) used
for storing up to four wiper settings. Writing to the wiper control
register or any of the non−volatile data registers is via a I
2
C serial bus.
On power−up, the contents of the first data register (DR0) for each of
the four potentiometers is automatically loaded into its respective
wiper control register (WCR).
The Write Protection (WP
) pin protects against inadvertent
programming of the data register.
The CAT5409 can be used as a potentiometer or as a two terminal,
variable resistor. It is intended for circuit level or system level
adjustments in a wide variety of applications.
Features
• Four Linear Taper Digitally Programmable Potentiometers
• 64 Resistor Taps per Potentiometer
• End to End Resistance 2.5 kW, 10 kW, 50 kW or 100 kW
• I
2
C Interface
• Low Wiper Resistance, Typically 80 W
• Four Non−volatile Wiper Settings for Each Potentiometer
• Recall of Saved Wiper Settings at Power−up
• 2.5 to 6.0 Volt Operation
• Standby Current less than 1 mA
• 1,000,000 Nonvolatile WRITE Cycles
• 100 Year Nonvolatile Memory Data Retention
• 24−lead SOIC and 24−lead TSSOP
• Write Protection for Data Register
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
http://onsemi.com
TSSOP−24
Y SUFFIX
CASE 948AR
PIN CONNECTIONS
SOIC−24 (W)
(Top View)
WP
SDA
A
1
R
L1
1
R
H1
R
W1
A
2
R
W0
R
H0
R
L0
SOIC−24
W SUFFIX
CASE 751BK
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
ORDERING INFORMATION
V
CC
NC
R
L3
R
H3
R
W3
GND
NC
R
W2
R
H2
R
L2
CAT5409
A
0
NC
SCL
A
3
TSSOP−24 (Y)
(Top View)
CAT5409
NC
R
L3
R
H3
R
W3
A
0
NC
A
3
SCL
R
L2
R
H2
R
W2
NC
V
CC
R
L0
R
H0
R
W0
A
2
WP
SDA
A
1
R
L1
R
H1
R
W1
GND
1
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