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CAT5251YI50

更新时间： 2024-11-28 06:46:15
品牌 Logo 应用领域
安森美 - ONSEMI /
页数 文件大小 规格书
15页 230K
描述
Quad Digitally Programmable Potentiometer (DPP™) with 256 Taps and SPI Interface

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CAT5251YI50 技术参数

是否无铅： 不含铅生命周期：Obsolete
零件包装代码：TSSOP包装说明：TSSOP, TSSOP24,.25
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.19Base Number Matches：1

CAT5251YI50 数据手册

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CAT5251  
Quad Digitally Programmable Potentiometer (DPP™) with  
256 Taps and SPI Interface  
FEATURES  
DESCRIPTION  
„ Four linear-taper digitally programmable  
The CAT5251 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 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.  
potentiometers  
„ 254 resistor taps per potentiometer  
„ End to end resistance 50 kΩ or 100 kΩ  
„ Potentiometer control and memory access via  
SPI interface  
„ Low wiper resistance, typically 100 Ω  
„ 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 µA  
„ 1,000,000 nonvolatile WRITE cycles  
„ 100 year nonvolatile memory data retention  
„ SOIC 24-lead and TSSOP 24-lead  
„ Industrial temperature range  
The CAT5251 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 -40°C to 85°C  
industrial operating temperature range and offered in  
a 24-lead SOIC and TSSOP package.  
For Ordering Information details, see page 14.  
PIN CONFIGURATION  
FUNCTIONAL DIAGRAM  
SOIC 24-Lead (W)  
TSSOP 24-Lead (Y)  
¯¯¯¯¯  
HOLD  
SO  
A0  
1
2
3
4
5
6
7
8
9
24  
R
H0  
R
R
H2  
R
H3  
H1  
23 SCK  
22 RL2  
21 RH2  
20 RW2  
19 NC  
18 GND  
17 RW1  
16 RH1  
15 RL1  
14 A1  
CS  
SCK  
SI  
WIPER  
CONTROL  
REGISTERS  
RW3  
RH3  
RL3  
NC  
VCC  
RLO  
RHO  
SPI BUS  
INTERFACE  
R
W0  
SO  
R
W1  
R
W2  
R
W3  
CAT  
5251  
WP  
A0  
A1  
NONVOLATILE  
DATA  
REGISTERS  
CONTROL  
LOGIC  
HOLD  
R
L0  
R
L1  
R
L2  
R
L3  
RWO 10  
¯¯¯  
CS  
11  
12  
¯¯¯  
WP  
13 SI  
© 2009 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
1
Doc. No. MD-2017 Rev. H  
1234567...15

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