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CAT5259 Datasheet(PDF) 1 Page - Catalyst Semiconductor

Part No. CAT5259
Description  Quad Digitally Programmable Potentiometers (DPP) with 256 Taps and 2-wire Interface
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Maker  CATALYST [Catalyst Semiconductor]
Homepage  http://www.catalyst-semiconductor.com
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CAT5259 Datasheet(HTML) 1 Page - Catalyst Semiconductor

 
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DESCRIPTION
The CAT5259 is four digitally programmable
potentiometers (DPPs™) integrated with control logic
and 16 bytes of NVRAM memory. Each DPP consists of
a series of 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 8-bit control register
(WCR) independently controls the wiper tap switches for
each DPP. Associated with each wiper control register
are four 8-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
CAT5259
Quad Digitally Programmable Potentiometers (DPP™)
with 256 Taps and 2-wire Interface
FEATURES
s Four linear taper digitally programmable
potentiometers
s 256 resistor taps per potentiometer
s End to end resistance 50k
Ω or 100kΩ
s Potentiometer control and memory access via
2-wire interface (I2C like)
s Low wiper resistance, typically 100
s Nonvolatile memory storage for up to four
wiper settings for each potentiometer
s Automatic recall of saved wiper settings at
power up
s 2.5 to 6.0 volt operation
s Standby current less than 1
µA
s 1,000,000 nonvolatile WRITE cycles
s 100 year nonvolatile memory data retention
s 24-lead SOIC and 24-lead TSSOP packages
s Industrial temperature range
PIN CONFIGURATION
FUNCTIONAL DIAGRAM
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Document No. 2000, Rev. F
registers is via a 2-wire 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 registers.
The CAT5259 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. It is available in the 0˚C to 70˚C commercial
and -40˚C to 85˚C industrial operating temperature
ranges and offered in a 24-lead SOIC and TSSOP
package.
SOIC/TSSOP Package (J, W/U, Y)
24
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2
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NC
A0
R
R
R
NC
V
R
R
R
A2
WP
A3
SCL
RL2
RH2
R
NC
GND
R
R
R
A1
SDA
CAT
5259
CC
W3
H3
L3
W0
H0
W2
W1
H1
L1
L0
ALO
GEN FR
TM
LEAD FREE
R
H0
W0
W2
W3
W1
H1
H2
H3
R
R
R
RL0
L1
L2
L3
R
R
R
WIPER
CONTROL
REGISTERS
NONVOLATILE
DATA
REGISTERS
2-WIRE BUS
INTERFACE
CONTROL
LOGIC
SCL
SDA
WP
A0
A1
A2
A3
R
R
R
R


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