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© Semiconductor Components Industries, LLC, 2012
May, 2012 − Rev. 10
1 Publication Order Number:
CAT5419/D
CAT5419
Dual Digitally Program-
mable Potentiometers (DPP)
with 64 Taps and 2-wire
Interface
Description
The CAT5419 is two 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 2−wire serial
bus (I
2
C−like). On power−up, the contents of the first data register
(DR0) for each of the two potentiometers is automatically loaded into
its respective wiper control registers (WCR).
The Write Protection (WP
) pin protects against inadvertent
programming of the data register.
The CAT5419 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
• Two Linear−taper Digital Potentiometers
• 64 Resistor Taps per Potentiometer
• End to End Resistance 2.5 kW, 10 kW, 50 kW or 100 kW
• Potentiometer Control and Memory Access via 2−wire Interface
(I
2
C like)
• Low Wiper Resistance, Typically 80 W
• Four Non−volatile Wiper Settings for Each Potentiometer
• Recall of 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)
NC
V
CC
R
L0
R
H0
1
R
W0
A2
NC
NC
NC
A
0
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
NC
A
3
SCL
NC
NC
WP
SDA
A
1
R
L1
R
H1
CAT5419
NC
NC
R
W1
GND
TSSOP−24 (Y)
(Top View)
CAT5419
WP
A
2
R
W0
R
H0
R
L0
V
CC
NC
NC
NC
NC
A
0
NC
SDA
A
1
R
L1
R
H1
R
W1
GND
NC
NC
NC
NC
SCL
A
3
1
