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CAT5269 Fiches technique(PDF) 1 Page - Catalyst Semiconductor

No de pièce CAT5269
Description  Dual Digitally Programmable Potentiometers (DPP™) with 256 Taps and 2-wire Interface
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Fabricant  CATALYST [Catalyst Semiconductor]
Site Internet  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT5269 Fiches technique(HTML) 1 Page - Catalyst Semiconductor

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CAT5269
© Catalyst Semiconductor, Inc.
1
Doc. No. MD-2123 Rev. C
Characteristics subject to change without notice
Dual Digitally Programmable Potentiometers
(DPP™) with 256 Taps and 2-wire Interface
FEATURES
Four linear taper digitally programmable
potentiometers
256 resistor taps per potentiometer
End to end resistance 50kΩ or 100kΩ
Potentiometer control and memory access via
2-wire interface (I
2C like)
Low wiper resistance, typically 100Ω
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
24-lead SOIC and TSSOP packages
Industrial temperature range
For Ordering Information details, see page 15.
PIN CONFIGURATION
SOIC (W)
TSSOP (Y)
NC
1
24 A3
A0
2
23 SCL
NC
3
22 NC
NC
4
21 NC
NC
5
20 NC
NC
6
19 NC
VCC 7
18 GND
RLO 8
17 RW1
RHO 9
16 RH1
RWO 10
15 RL1
A2 11
14 A1
WP
¯¯¯ 12
13 SDA
DESCRIPTION
The CAT5259 is two digitally programmable poten–
tiometers (DPPs™) integrated with control logic and
18 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 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 -40ºC to 85ºC
industrial operating temperature ranges and offered in
a 24-lead SOIC and TSSOP package.
FUNCTIONAL DIAGRAM
RW0
RW1
RH0
A1
A2
A0
A3
RH1
RL0
RL1
NONVOLATILE
DATA
REGISTERS
WIPER
CONTROL
REGISTERS
CONTROL
LOGIC
2-WIRE BUS
INTERFACE
WP
SCL
SDA


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