DATASHEET
X9511
Single Push Button Controlled Potentiometer (XDCP™) Linear, 32 Taps, Push
Button Controlled, Terminal Voltage ±5V
FEATURES
• Push button controlled
• Low power CMOS
—Active current, 3mA max
—Standby current, 100µA typical
• 31 resistive elements
—Temperature compensated
—20% end to end resistance range
—-5V to +5V range
• 32 wiper tap points
—Wiper positioned via two push button inputs
—Slow and fast scan modes
—AUTOSTORE
®
option
—Manual store option
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 100 year wiper position data retention
• X9511W = 10k
• Packages
—8 Ld PDIP
—8 Ld SOIC
• Pb-free plus anneal available (RoHS compliant)
DESCRIPTION
The Intersil X9511 is a push button controlled potenti-
ometer that is ideal for push button controlled resis-
tance trimming.
The X9511 is a resistor array composed of 31 resistive
elements. Between each element and at either end
are tap points accessible to the wiper element. The
position of the wiper element is controlled by the PU
and PD inputs. The position of the wiper can be auto-
matically stored in E
2
memory and then be recalled
upon a subsequent power-on operation.
The resolution of the X9511 is equal to the maximum
resistance value divided by 31. As an example, for the
X9511W (10k) each tap point represents 323.
All Intersil nonvolatile products are designed and
tested for applications requiring extended endurance
and data retention.
FN8205
Rev 3.00
February 2, 2007
ORDERING INFORMATION
PART NUMBER
X9511WP
X9511WPZ (Note)
X9511WPI
X9511WPIZ (Note)
X9511WS**
X9511WSZ*
,
**(Note)
X9511WSI*
,
**
X9511WSIZ*
,
** (Note)
PART MARKING
X9511WP
X9511WP Z
X9511WP I
X9511WP Z I
X9511W
X9511W Z
X9511W I
X9511W Z I
R
TOTAL
(k)
10
TEMPERATURE
RANGE (°C)
0 to +70
0 to +70
-40 to +85
-40 to +85
0 to +70
0 to +70
-40 to +85
-40 to +85
PACKAGE
8 Ld PDIP
PKG. DWG. #
MDP0031
8 Ld PDIP*** (Pb-free) MDP0031
8 Ld PDIP
MDP0031
8 Ld PDIP*** (Pb-free) MDP0031
8 Ld SOIC
8 Ld SOIC (Pb-free)
8 Ld SOIC
8 Ld SOIC (Pb-free)
MDP0027
MDP0027
MDP0027
MDP0027
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials
and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering
operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.
*Add "T1" suffix for tape and reel.
**Add "T2" suffix for tape and reel.
***Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder
processing applications.
FN8205 Rev 3.00
February 2, 2007
Page 1 of 9
X9511
BLOCK DIAGRAM
5-BIT
UP/DOWN
COUNTER
PU
PD
31
30
29
V
H
5-BIT
EEPROM
MEMORY
ONE
OF
28
THIRTY-TWO
DECODER
2
STORE AND
RECALL
CONTROL
CIRCUITRY
1
0
TRANSFER
GATES
RESISTOR
ARRAY
ASE
V
L
V
W
FN8205 Rev 3.00
February 2, 2007
Page 2 of 9
X9511
PIN DESCRIPTIONS
V
H
/R
H
and V
L
/R
L
The high (V
H
/R
H
) and low (V
L
/R
L
) terminals of the
X9511 are equivalent to the fixed terminals of a mechan-
ical potentiometer. The minimum voltage is -5V and the
maximum is +5V. It should be noted that the terminology
of V
L
/R
L
and V
H
/R
H
are in reference to the relative posi-
tion of the terminal in relation to wiper movement direc-
tion selected by the PU and PD inputs, and not the
voltage potential on the terminal.
PU
The debounced PU input is for incrementing the wiper
position. An on-chip pull-up holds the PU input HIGH. A
switch closure to ground or a LOW logic level will, after a
debounce time, move the wiper to the next adjacent
higher tap position.
PD
The debounced PD input is for decrementing the wiper
position. An on-chip pull-up holds the PD input HIGH. A
switch closure to ground or a LOW logic level will, after a
debounce time, move the wiper to the next adjacent
lower tap position.
ASE
The debounced ASE (AUTOSTORE enable) pin can be
in one of two states:
V
IL
- AUTOSTORE is enabled. When V
CC
powers
down, an automatic store cycle takes place.
V
IH
- AUTOSTORE is disabled. A LOW to HIGH will initi-
ate a manual store operation. This is for the user who
wishes to connect a push button switch to this pin. For
every valid push, the X9511 will store the current wiper
position to the EEPROM.
PIN CONFIGURATION
DIP/SOIC
PU
PD
V
H
V
SS
1
2
3
4
X9511
8
7
6
5
V
CC
ASE
V
L
V
W
PIN NAMES
SYMBOL
V
H
/R
H
V
W
/R
W
V
L
/R
L
V
SS
V
CC
PU
PD
ASE
DESCRIPTION
High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage
Push Up Input
Push Down Input
AUTOSTORE Enable Input
DEVICE OPERATION
There are three sections of the X9511: the input control,
counter and decode section; the EEPROM memory; and
the resistor array. The input control section operates just
like an up/down counter. The output of this counter is
decoded to turn on a single electronic switch, connecting
a point on the resistor array to the wiper output. Under the
proper conditions the contents of the counter can be
stored in EEPROM memory and retained for future use.
The resistor array is comprised of 31 individual resistors
connected in series. At either end of the array and
between each resistor is an electronic switch that trans-
fers the potential at that point to the wiper.
The X9511 is designed to interface directly to two push
button switches for effectively moving the wiper up or
down. The PU and PD inputs increment or decrement a
5-bit counter respectively. The output of this counter is
decoded to select one of the thirty-two wiper positions
along the resistive array. The wiper increment input, PU
and the wiper decrement input, PD are both connected
to an internal pull-up so that they normally remain HIGH.
When pulled LOW by an external push button switch or
a logic LOW level input, the wiper will be switched to the
next adjacent tap position.
Internal debounce circuitry prevents inadvertent switch-
ing of the wiper position if PU or PD remain LOW for less
than 40ms, typical. Each of the buttons can be pushed
either once for a single increment/decrement or continu-
ously for a multiple increments/decrements. The number
of increments/decrements of the wiper position depend
on how long the button is being pushed. When making a
continuous push, after the first second, the incre-
ment/decrement speed increases. For the first second
the device will be in the slow scan mode. Then if the but-
ton is held for longer than 1 second the device will go
into the fast scan mode. As soon as the button is
released the X9511 will return to a standby condition.
FN8205 Rev 3.00
February 2, 2007
Page 3 of 9
X9511
The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the
last position. That is, the counter does not wrap around
when clocked to either extreme.
AUTOSTORE
The value of the counter is stored in EEPROM memory
whenever the chip senses a power-down of V
CC
while
ASE is enabled (held LOW). When power is restored,
the content of the memory is recalled and the counter
reset to the last value stored.
If AUTOSTORE is to be implemented, ASE is typically
hard wired to V
SS
. If ASE is held HIGH during power-up
and then taken LOW, the wiper will not respond to the
PU or PD inputs until ASE is brought HIGH and held
HIGH.
V
CC
8
2k
1
2
7
V
CC
PU
PD
ASE
V
H
V
W
V
L
V
SS
3
5
6
8
1
2
7
V
CC
PU
PD
ASE
V
SS
V
H
V
W
V
L
4
3
5
6
V
CC
3.3µF
Manual (Push Button) Store
When ASE is not enabled (held HIGH) a push button
switch may be used to pull ASE LOW and released to
perform a manual store of the wiper position.
R
TOTAL
with V
CC
Removed
The end to end resistance of the array will fluctuate once
V
CC
is removed.
FIGURE 1. TYPICAL CIRCUIT WITH ASE STORE
CONTROLLED BY PUSH BUTTON SWITCH
FIGURE 2. TYPICAL CIRCUIT WITH ASE STORE PIN USED
IN AUTOSTORE MODE
FN8205 Rev 3.00
February 2, 2007
Page 4 of 9
X9511
ABSOLUTE MAXIMUM RATINGS
Temperature under bias .................... -65C to +135C
Storage temperature.......................... -65C to +150C
Voltage on PU, PD, and V
CC
with respect to V
SS
................................. -1V to +7V
Voltage on V
H
and V
L
referenced to V
SS
................................... -8V to +8V
V
= |V
H
- V
L
|
X9511W ............................................................. 10V
Lead temperature (soldering 10 seconds) ....... +300C
Wiper current
1mA
ESD Rating
Human Body Model
(Per MIL-STD-883 Method 3015.7) .................... 2.5kV
Machine Model
(Per EIAJ ED-4701 Method C-111)...................... 250V
ANALOG CHARACTERISTICS
Electrical Characteristics
End-to-end resistance tolerance
20%
Power rating at +25C
X9511W ......................................................... 10mW
Wiper current
1mA
Max.
Typical wiper resistance .......................................40
Typical noise..............................< -120dB/Hz Ref: 1V
Resolution
Resistance ............................................................. 3%
Linearity
Absolute linearity
(1)
1.0
MI
(2)
Relative linearity
(3)
0.2
MI
(2)
COMMENT
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only; functional operation of the
device (at these or any other conditions above those
listed in the operational sections of this specification) is
not implied. Exposure to absolute maximum rating condi-
tions for extended periods may affect device reliability.
Temperature Coefficient
-40C to +85C
X9511W...................................... +300 ppm/C Typical
Ratiometric temperature coefficient
20
ppm
Wiper Adjustability
Unlimited wiper adjustment ....... (Non-Store operation)
Wiper position store operations...................... 100,000
data changes
Physical Characteristics
Marking Includes
Manufacturer’s Trademark
Resistance Value or Code
Date Code
Notes:
(1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = [V
W(n)
- (n*MI + V
W(0)
)]/MI = ±1 MI
Maximum.
(2) 1 Ml = Minimum Increment = R
TOT
/31 for resistor mode or 1MI = [V
W(31)
- V
W(0)
]/31 for voltage divider mode.
(3) Relative linearity is a measure of the error in step size between taps = (V
W(n+1)
- V
W(n)
] )/MI - 1=
0.2
MI
SYMBOL TABLE
WAVEFORM
INPUTS
Must be
steady
May change
from Low to
High
May change
from High to
Low
Don’t Care:
Changes
Allowed
N/A
OUTPUTS
Will be
steady
Will change
from Low to
High
Will change
from High to
Low
Changing:
State Not
Known
Center Line
is High
Impedance
FN8205 Rev 3.00
February 2, 2007
Page 5 of 9
Embedded System
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