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X9221 데이터시트(PDF) 1 Page - Xicor Inc.

부품명 X9221
상세설명  Dual E2POT??Nonvolatile Digital Potentiometer
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제조업체  XICOR [Xicor Inc.]
홈페이지  http://www.xicor.com
Logo XICOR - Xicor Inc.

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X9221
1
Dual E2POTNonvolatile Digital Potentiometer
© Xicor, Inc. 1994, 1995, 1996 Patents Pending.
Characteristics subject to change without notice
3079-1.6 6/12/96 T1/C1/D0 NS
FEATURES
Two E2POTs 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
Low Power CMOS
Direct Write Cell
—Endurance - 100,000 Writes per Register
—Register Data Retention - 100 years
8 Bytes of E2PROM memory
3 Resistor Array Values
—2K
to 50KMask Programmable
Resolution: 64 Taps each Pot
20-Lead Plastic DIP and 20-Lead SOIC Packages
Advance Information
X9221
DESCRIPTION
The X9221 integrates two nonvolatile E2POT™ digitally
controlled potentiometers on a monolithic CMOS micro-
circuit.
The X9221 contains two 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.
FUNCTIONAL DIAGRAM
Terminal Voltage
±5V, 64 Taps
R0 R1
R2 R3
WIPER
COUNTER
REGISTER
(WCR)
RESISTOR
ARRAY
POT 1
VH1
VL1
VW1
R0 R1
R2 R3
WIPER
COUNTER
REGISTER
(WCR)
INTERFACE
AND
CONTROL
CIRCUITRY
SCL
SDA
A0
A1
A2
A3
VH0
VL0
VW0
DATA
3079 ILL F07.1
8
APPLICATION NOTES
A V AILABLE
AN20 • AN42 • AN44–48 • AN50 • AN52 • AN53 • AN73


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