CAT5221WI-25 View Datasheet(PDF) - Catalyst Semiconductor => Onsemi
Part Name
Description
Manufacturer
CAT5221WI-25
Catalyst Semiconductor => Onsemi
CAT5221WI-25 Datasheet PDF : 16 Pages
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CAT5221
Dual Digitally Programmable Potentiometer (DPP™) with
64 Taps and I2C Interface
FEATURES
Two linear-taper digitally programmable
potentiometers
64 resistor taps per potentiometer
End to end resistance 2.5kΩ, 10kΩ, 50kΩ or
100kΩ
Potentiometer control and memory access via
I2C interface
Low wiper resistance, typically 80Ω
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 1µA
1,000,000 nonvolatile WRITE cycles
100 year nonvolatile memory data retention
20-lead SOIC and TSSOP packages
Industrial temperature range
For Ordering Information details, see page 15.
DESCRIPTION
The CAT5221 is two 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 I2C 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 CAT5221 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.
PIN CONFIGURATION
SOIC 20 Lead (W)
TSSOP 20 Lead (Y)
RW0 1
20 VCC
RL0 2
19 NC
RH0 3
18 NC
A0 4
17 NC
A2 5 CAT 16 A1
RW1 6 5221 15 A3
RL1 7
14 SCL
RH1 8
13 NC
SDA 9
12 NC
GND 10
11 NC
FUNCTIONAL DIAGRAM
RH0 RH1
SCL
SDA
A0
A1
A2
A3
I2C
INTERFACE
WIPER
CONTROL
REGISTERS
RW0
CONTROL
LOGIC
NONVOLATILE
DATA
REGISTERS
RW1
RL0 RL1
© Catalyst Semiconductor, Inc.
1
Characteristics subject to change without notice
Doc. No. MD-2113 Rev. K
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