參數(shù)資料
型號(hào)： X9258UB24-2.7
元件分類(lèi)： 數(shù)字電位計(jì)
英文描述： Quad Digital Controlled Potentiometers (XDCP)
中文描述： 四數(shù)字（數(shù)字電位器控制電位器）
文件頁(yè)數(shù)： 3/22頁(yè)
文件大?。?/td> 413K
代理商： X9258UB24-2.7
X9258
Characteristics subject to change without notice.
3 of 22
REV 1.1.7 2/4/03
www.xicor.com
PIN NAMES
PRINCIPLES OF OPERATION
The X9258 is a highly integrated microcircuit
incorporating four resistor arrays and their associated
registers and counters and the serial interface logic
providing direct communication between the host and
the DCP potentiometers.
Serial Interface—2-Wire
The X9258 supports a bidirectional bus oriented
protocol. The protocol defines any device that sends
data onto the bus as a transmitter and the receiving
device as the receiver. The device controlling the
transfer is a master and the device being controlled is
the slave. The master will always initiate data transfers
and provide the clock for both transmit and receive
operations. Therefore, the X9258 will be considered a
slave device in all applications.
Clock and Data Conventions
Data states on the SDA line can change only during
SCL LOW periods (t
LOW
). SDA state changes during
SCL HIGH are reserved for indicating start and stop
conditions.
Start Condition
All commands to the X9258 are preceded by the start
condition, which is a HIGH to LOW transition of SDA
while SCL is HIGH (t
HIGH
). The X9258 continuously
monitors the SDA and SCL lines for the start condition
and will not respond to any command until this
condition is met.
Stop Condition
All communications must be terminated by a stop
condition, which is a LOW to HIGH transition of SDA
while SCL is HIGH.
Acknowledge
Acknowledge is a software convention used to provide
a positive handshake between the master and slave
devices on the bus to indicate the successful receipt of
data. The transmitting device, either the master or the
slave, will release the SDA bus after transmitting eight
bits. The master generates a ninth clock cycle and
during this period the receiver pulls the SDA line LOW
to acknowledge that it successfully received the eight
bits of data.
The X9258 will respond with an acknowledge after
recognition of a start condition and its slave address
and once again after successful receipt of the
command byte. If the command is followed by a data
byte the X9258 will respond with a final acknowledge.
Array Description
The X9258 is comprised of four resistor arrays. Each
array contains 255 discrete resistive segments that are
connected in series. The physical ends of each array
are equivalent to the fixed terminals of a mechanical
potentiometer (V
H
/R
H
and V
L
/R
L
inputs).
At both ends of each array and between each resistor
segment is a CMOS switch connected to the wiper
(V
W
) output. Within each individual array only one
switch may be turned on at a time. These switches are
controlled by the Wiper Counter Register (WCR). The
8 bits of the WCR are decoded to select, and enable,
one of 256 switches.
The WCR may be written directly, or it can be changed
by transferring the contents of one of four associated
data registers into the WCR. These data registers and
the WCR can be read and written by the host system.
Device Addressing
Following a start condition the master must output the
address of the slave it is accessing. The most
significant four bits of the slave address are the device
type identifier (refer to Figure 1 below). For the X9258
this is fixed as 0101[B].
Symbol
Description
SCL
SDA
A0-A3
V
H0
/R
H0
–V
H3
/R
H3
,
V
L0
/R
L0
–V
L3
/R
L3
V
W0
/R
W0
–V
W3
/R
W3
Serial Clock
Serial Data
Device Address
Potentiometer Pins
(terminal equivalent)
Potentiometers Pins
(wiper equivalent)
Hardware Write Protection
Analog Supplies
System Supply Voltage
System Ground
No Connection (Allowed)
WP
V+,V-
V
CC
V
SS
NC
相關(guān)PDF資料
PDF描述
X9258UB24I Quad Digital Controlled Potentiometers (XDCP)
X9258UB24I-2.7 Quad Digital Controlled Potentiometers (XDCP)
X9258US24 Quad Digital Controlled Potentiometers (XDCP)
X9258US24-2.7 Quad Digital Controlled Potentiometers (XDCP)
X9258US24I Quad Digital Controlled Potentiometers (XDCP)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
X9258UB24I 制造商:XICOR 制造商全稱(chēng):Xicor Inc. 功能描述:Quad Digital Controlled Potentiometers (XDCP)
X9258UB24I-2.7 制造商:XICOR 制造商全稱(chēng):Xicor Inc. 功能描述:Quad Digital Controlled Potentiometers (XDCP)
X9258US24 功能描述:IC DGTL POT QUAD 100K 24SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 標(biāo)準(zhǔn)包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 ±300 ppm/°C 存儲(chǔ)器類(lèi)型:非易失 接口:I²C（設(shè)備位址） 電源電壓:2.7 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR)
X9258US24-2.7 功能描述:IC DGTL POT QUAD 100K 24SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 標(biāo)準(zhǔn)包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 ±300 ppm/°C 存儲(chǔ)器類(lèi)型:非易失 接口:I²C（設(shè)備位址） 電源電壓:2.7 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR)
X9258US24-2.7T1 功能描述:IC DGTL POT QUAD 100K 24SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 標(biāo)準(zhǔn)包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 ±300 ppm/°C 存儲(chǔ)器類(lèi)型:非易失 接口:I²C（設(shè)備位址） 電源電壓:2.7 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR)
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