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CAT5401 Fiches technique(PDF) 1 Page - Catalyst Semiconductor

No de pièce CAT5401
Description  Quad Digitally Programmable Potentiometers (DPP™) with 64 Taps and SPI Interface
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Fabricant  CATALYST [Catalyst Semiconductor]
Site Internet  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT5401 Fiches technique(HTML) 1 Page - Catalyst Semiconductor

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CAT5401
© Catalyst Semiconductor, Inc.
1
Doc. No. MD-2012 Rev. G
Characteristics subject to change without notice
Quad Digitally Programmable Potentiometers
(DPP™) with 64 Taps and SPI Interface
FEATURES
Four 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 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
24-lead SOIC and 24-lead TSSOP
Industrial temperature range
For Ordering Information details, see page 14.
PIN CONFIGURATION
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
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 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.
FUNCTIONAL DIAGRAM
NONVOLATILE
DATA
REGISTERS
CONTROL LOGIC
WIPER CONTROL
REGISTERS

SPI BUS
INTERFACE
RW0
RW1
RW2
RW3
RL0
A0
A1
CS
SCK
SI
SO
RL1
RL2
RL3
RH0
RH1
RH2
RH3
WP
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
CAT
5401
VCC
RL0
RH0
RW0
CS
WP
SI
A1
RL1
RH1
RW1
GND
NC
RL3
RH3
RW3
A0
SO
HOLD
SCK
RL2
RH2
RW2
NC
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
CAT
5401
SI
A1
RL1
RH1
RW1
GND
NC
RW2
RH2
RL2
SCK
HOLD
WP
CS
RW0
RH0
RL0
VCC
NC
RL3
RH3
RW3
A0
SO
SOIC Package (W)
TSSOP Package (Y)


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