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CAT5411YI-25-T1 Datasheet(PDF) 1 Page - Catalyst Semiconductor

No. de pieza CAT5411YI-25-T1
Descripción Electrónicos  Dual Digitally Programmable Potentiometers (DPP TM) with 64 Taps and SPI Interface
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT5411YI-25-T1 Datasheet(HTML) 1 Page - Catalyst Semiconductor

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CAT5411
© 2007 Catalyst Semiconductor, Inc.
1
Doc. No. 2114 Rev. H
Characteristics subject to change without notice
Dual Digitally Programmable Potentiometers (DPP™)
with 64 Taps and SPI 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
SPI interface: Mode (0, 0) and (1, 1)
Low wiper resistance, typically 80
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
24-lead SOIC and 24-lead TSSOP
Industrial temperature ranges
PIN CONFIGURATION
SOIC (W)
(top view)
VCC
1
24 NC
RL0
2
23 NC
RH0
3
22 NC
RW0
4
21 NC
CS
¯¯¯
5
20 A0
WP
¯¯¯
6
19 SO
SI
7
18 HOLD
¯¯¯¯¯
A1
8
17 SCK
RL1
9
16 NC
RH1 10
15 NC
RW1 11
14 NC
GND 12
13 NC
CAT
5411
TSSOP (Y)
(top view)
SI
1
24 WP
¯¯¯
A1
2
23
CS
¯¯¯
RL1
3
22 RW0
RH1
4
21 RH0
RW1
5
20 RL0
GND
6
19 VCC
NC
7
18 NC
NC
8
17 NC
NC
9
16 NC
NC 10
15 NC
SCK 11
14 A0
HOLD
¯¯¯¯¯ 12
13 SO
CAT
5411
DESCRIPTION
The
CAT5411
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 SPI serial
bus. On power-up, the contents of the first data
register (DR0) for each of the two potentiometers is
automatically loaded into its respective wiper control
register.
The CAT5411 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.
FUNCTIONAL DIAGRAM
For Ordering Information details, see page 15.
RW0
RW1
RH0
SO
SI
SCK
A0
A1
RH1
RL0
RL1
NONVOLATILE
DATA
REGISTERS
WIPER
CONTROL
REGISTERS
CONTROL
LOGIC
SPI BUS
INTERFACE
WP
CS


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