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X9241YS 参数 Datasheet PDF下载

X9241YS图片预览
型号: X9241YS
PDF下载: 下载PDF文件 查看货源
内容描述: 四E2POT⑩非易失性数字电位计 [Quad E2POT⑩ Nonvolatile Digital Potentiometer]
分类和应用: 数字电位计
文件页数/大小: 16 页 / 79 K
品牌: XICOR [ XICOR INC. ]
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A
PPLICATION
N
OTES AND
D
EVELOPMENT
S
YSTEM
A V A I L A B L E
AN20 • AN42–48 • AN50–53 • AN73 • XK9241
Terminal Voltage
±
5V, 64 Taps
X9241
X9241
Quad E
2
POT
Nonvolatile Digital Potentiometer
FEATURES
DESCRIPTION
The X9241 integrates four nonvolatile E
2
POT digitally
controlled potentiometers on a monolithic CMOS micro-
circuit.
The X9241 contains four resistor arrays, each com-
posed of 63 resistive elements. Between each element
and at either end are tap points accessible to the wiper
elements. The position of the wiper element on the array
is controlled by the user through the two-wire serial bus
interface.
Each resistor array has associated with it a wiper counter
register and four 8-bit data registers that can be directly
written and read by the user. The contents of the wiper
counter register control the position of the wiper on the
resistor array.
The data register may be read or written by the user. The
contents of the data registers can be transferred to the
wiper counter register to position the wiper. The current
wiper position can be transferred to any one of its
associated data registers.
The arrays may be cascaded to form resistive elements
with 127, 190 or 253 taps.
Four E
2
POTs in One Package
Two-Wire Serial Interface
Register Oriented Format
—Directly Write Wiper Position
—Read Wiper Position
—Store as Many as Four Positions per Pot
Instruction Format
—Quick Transfer of Register Contents to
Resistor Array
—Cascade Resistor Arrays
Low Power CMOS
Direct Write Cell
—Endurance - 100,000 Data Changes per Register
—Register Data Retention - 100 years
16 Bytes of E
2
PROM memory
3 Resistor Array Values
—2K
to 50K
Mask Programmable
—Cascadable For Values of 500
to 200K
Resolution: 64 Taps each Pot
20-Lead Plastic DIP, 20-Lead TSSOP and
20-Lead SOIC Packages
FUNCTIONAL DIAGRAM
VH2
WIPER RESISTOR
COUNTER ARRAY
REGISTER
POT 2
(WCR)
R0 R1
WIPER
COUNTER
REGISTER
(WCR)
R2 R3
SCL
SDA
A0
A1
A2
A3
VH0
R0 R1
VL0
VW0
R2 R3
VL2
VW2
INTERFACE
AND
CONTROL
CIRCUITRY
8
DATA
R0 R1
VH1
WIPER
COUNTER RESISTOR
ARRAY
REGISTER
POT 1
(WCR)
R0 R1
VH3
WIPER
RESISTOR
COUNTER
ARRAY
REGISTER
POT 3
(WCR)
R2 R3
VL1
VW1
R2 R3
VL3
VW3
3864 ILL F07.1
© Xicor, Inc. 1994, 1995, 1996 Patents Pending
3864-2.7 7/1/96 T0/C3/D3 NS
1
Characteristics subject to change without notice