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© Semiconductor Components Industries, LLC, 2012
May, 2012 − Rev. 19
1 Publication Order Number:
CAT5241/D
CAT5241
Quad Digitally Program-
mable Potentiometer (DPP)
with 64 Taps and I
2
C
Interface
Description
The CAT5241 is four Digitally Programmable Potentiometers
(DPPs) integrated with control logic and 16 bytes of NVRAM
memory. Each DPP consists of a series of 63 resistive elements
connected between two externally accessible end points. The tap
points between each resistive element are connected to the wiper
outputs with CMOS switches. A separate 6−bit control register (WCR)
independently controls the wiper tap switches 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 CAT5241 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
• Potentiometer Control and Memory Access via I
2
C Interface
• Low Wiper Resistance, Typically 80 W
• Nonvolatile Memory Storage for up to Four Wiper Settings for Each
Potentiometer
• Automatic 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
• 20−lead SOIC and TSSOP Packages
• Industrial Temperature Range
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
http://onsemi.com
TSSOP−20
Y SUFFIX
CASE 948AQ
PIN CONNECTIONS
SOIC−20 (W)
TSSOP−20 (Y)
(Top View)
V
CC
R
W0
R
L0
R
H0
1
A0
A2
R
W3
R
L3
R
H3
A1
SOIC−20
W SUFFIX
CASE 751BJ
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
ORDERING INFORMATION
A3
SCL
R
W2
R
L2
R
H2
R
W1
R
L1
R
H1
SDA
GND
CAT5241
页面指南
