X9221YPM Datasheet PDF - Xicor
| Part Number | X9221YPM | |
| Description | Dual E2POT Nonvolatile Digital Potentiometer | |
| Manufacturers | Xicor | |
| Logo |  |
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APPLICATION NOTES
AVA I L A B L E
AN20 • AN42 • AN44–48 • AN50 • AN52 • AN53 • AN73
XATed9vr2ma2n1icneaIlnVfoormltaatgioen±5V, 64 Taps
X9221
Dual E2POT™ Nonvolatile Digital Potentiometer
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
—2KΩ to 50KΩ Mask Programmable
• Resolution: 64 Taps each Pot
• 20-Lead Plastic DIP and 20-Lead SOIC Packages
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
SCL
SDA
A0
A1
A2
A3
INTERFACE
AND
CONTROL
CIRCUITRY
8
DATA
R0 R1
WIPER
COUNTER
REGISTER
R2 R3 (WCR)
VH0
VL0
VW0
R0 R1 WIPER
COUNTER RESISTOR
REGISTER ARRAY
R2 R3 (WCR)
POT 1
VH1
VL1
VW1
3079 ILL F07.1
© Xicor, Inc. 1994, 1995, 1996 Patents Pending.
3079-1.6 6/12/96 T1/C1/D0 NS
1
Characteristics subject to change without notice
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X9221
Figure 4. Three-Byte Command Sequence
SCL
SDA
S 0 1 0 1 A3 A2 A1 A0 A I3 I2 I1 I0 0 P0 R1 R0 A 0 0 D5 D4 D3 D2 D1 D0 A S
TC C
CT
AK K
KO
RP
T
3079 ILL F11
Figure 5. Increment/Decrement Command Sequence
SCL
SDA
XX
S 0 1 0 1 A3 A2 A1 A0 A I3 I2 I1 I0 0 P0 R1 R0 A I I
T C CN N
A K KCC
R 12
T
ID
NE
CC
n1
DS
ET
CO
nP
3079 ILL F12
Figure 6. Increment/Decrement Timing Limits
INC/DEC
CMD
ISSUED
SCL
SDA
VW VOLTAGE OUT
5
tCLWV
3079 ILL F13
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for X9221YPM electronic component. |
| Information | Total 14 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ X9221YPM.PDF Datasheet ] | |
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