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CAT5401YI-10-T2 Programmierhandbuch

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© Semiconductor Components Industries, LLC, 2012
February, 2012 Rev. 10
1 Publication Order Number:
CAT5401/D
CAT5401
Quad Digitally Program-
mable Potentiometers (DPP)
with 64 Taps and SPI
Interface
Description
The CAT5401 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 6bit control register (WCR)
independently controls the wiper tap switches for each DPP.
Associated with each wiper control register are four 6bit nonvolatile
memory data registers (DR) used for storing up to four wiper settings.
Writing to the wiper control register or any of the nonvolatile data
registers is via a SPI serial bus. On powerup, the contents of the first
data register (DR0) for each of the four potentiometers is
automatically loaded into its respective wiper control register.
The CAT5401 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 SPI Interface:
Mode (0, 0) and (1, 1)
Low Wiper Resistance, Typically 100 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
24lead SOIC and 24lead TSSOP
Industrial Temperature Range
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
http://onsemi.com
TSSOP24
Y SUFFIX
CASE 948AR
PIN CONNECTIONS
SOIC24 (W)
(Top View)
NC
V
CC
R
L0
R
H0
1
R
W0
CS
R
L3
R
H3
R
W3
A
0
SOIC24
W SUFFIX
CASE 751BK
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
ORDERING INFORMATION
SO
HOLD
SCK
R
L2
R
H2
WP
SI
A
1
R
L1
R
H1
CAT5401
R
W2
NC
R
W1
GND
TSSOP24 (Y)
(Top View)
CAT5401
WP
CS
R
W0
R
H0
R
L0
V
CC
NC
R
L3
R
H3
R
W3
A
0
SO
SI
A
1
R
L1
R
H1
R
W1
GND
NC
R
W2
R
H2
R
L2
SCK
HOLD
1
Verzeichnis

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