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参数资料
| 型号： | X9268TT24I-2.7 |
| 厂商： | Intersil Corporation |
| 英文描述： | Dual Supply/Low Power/256-Tap/2-Wire Bus |
| 中文描述： | 双电源/低Power/256-Tap/2-Wire巴士 |
| 文件页数： | 5/24页 |
| 文件大小： | 368K |
| 代理商： | X9268TT24I-2.7 |
5
FN8172.1
June 21, 2005
PRINCIPLES OF OPERATION
The X9268 is a 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 digitally
controlled potentiometers. This section provides detail
description of the following:
– Resistor Array Description
– Serial Interface Description
– Instruction and Register Description.
Array Description
The X9268 is comprised of a resistor array (See
Figure 1). 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 (R
H
and R
L
inputs).
At both ends of each array and between each resistor
segment is a CMOS switch connected to the wiper
(R
W
) output. Within each individual array only one
switch may be turned on at a time.
These switches are controlled by a Wiper Counter
Register (WCR). The 8-bits of the WCR (WCR[7:0])
are decoded to select, and enable, one of 256
switches (See Table 1).
The WCR may be written directly. These Data
Registers can the WCR can be read and written by the
host system.
Power-up and Down Requirements.
At all times, the voltages on the potentiometer pins
must be less than V+ and more than V-. During power-
up and power-down, V
CC
, V+, and V- must reach their
final values within 1msecs of each other. The V
CC
ramp rate spec is always in effect.
Figure 1. Detailed Potentiometer Block Diagram
SERIAL DATA PATH
FROM INTERFACE
CIRCUITRY
REGISTER 0
(DR0)
REGISTER 1
(DR1)
REGISTER 2
(DR2)
REGISTER 3
(DR3)
SERIAL
BUS
INPUT
PARALLEL
BUS
INPUT
COUNTER
REGISTER
(WCR)
INC/DEC
LOGIC
UP/DN
CLK
MODIFIED SCL
UP/DN
R
H
R
L
R
W
8
8
C
O
U
N
T
E
R
D
E
C
O
D
E
IF WCR = 00[H] THEN R
W
= R
L
IF
WCR = FF[H]
THEN
R
W
=
R
H
WIPER
One of Two Potentiometers
X9268
相关PDF资料 |
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|---|---|
| X9268US24 | Dual Supply/Low Power/256-Tap/2-Wire Bus |
| X9268US24-2.7 | Dual Supply/Low Power/256-Tap/2-Wire Bus |
| X9268US24I | Dual Supply/Low Power/256-Tap/2-Wire Bus |
| X9268US24I-2.7 | Dual Supply/Low Power/256-Tap/2-Wire Bus |
| X9268UT24 | Dual Supply/Low Power/256-Tap/2-Wire Bus |
相关代理商/技术参数 |
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| X9268TV24I-2.7 | 功能描述:IC XDCP DUAL 256TAP 100K 24TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:XDCP™ 标准包装:2,500 系列:XDCP™ 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 ±300 ppm/°C 存储器类型:非易失 接口:I²C（设备位址） 电源电压:2.7 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
| X9268US24 | 功能描述:IC DCP DUAL 50K 256TP 24SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:XDCP™ 标准包装:2,500 系列:XDCP™ 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 ±300 ppm/°C 存储器类型:非易失 接口:I²C（设备位址） 电源电压:2.7 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
| X9268US24-2.7 | 功能描述:IC XDCP DUAL 256TAP 50K 24-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:XDCP™ 标准包装:2,500 系列:XDCP™ 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 ±300 ppm/°C 存储器类型:非易失 接口:I²C（设备位址） 电源电压:2.7 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
| X9268US24-2.7T1 | 功能描述:IC XDCP DUAL 256TAP 50K 24-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:XDCP™ 标准包装:2,500 系列:XDCP™ 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 ±300 ppm/°C 存储器类型:非易失 接口:I²C（设备位址） 电源电压:2.7 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
| X9268US24I | 功能描述:IC XDCP DUAL 256TAP 50K 24-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:XDCP™ 标准包装:2,500 系列:XDCP™ 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 ±300 ppm/°C 存储器类型:非易失 接口:I²C（设备位址） 电源电压:2.7 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
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