1Doc. No. 2118, Rev. H
CAT5116
APPLICATIONS
■Automated product calibration
■Remote control adjustments
■Offset, gain and zero control
■Audio volume control
■Sensor adjustment
■Motor controls and feedback systems
■Programmable analog functions
FEATURES
■100-position, log-taper potentiometer
■Non-volatile EEPROM wiper storage
■10nA ultra-low standby current
■Single-supply operation: 2.5V - 5.5V
■Increment Up/Down serial interface
■Resistance value: 32kΩΩ
ΩΩ
Ω
■A va i la b le i n 8-pin MSOP, TSSOP, SOIC and DIP packages
automatically reinstated when power is returned. The
wiper can be adjusted to test new system values without
effecting the stored setting.
Wiper-control of the CAT5116 is accomplished with
three input control pins, CS, U/D, and INC. The INC
input increments the wiper in the direction which is
determined by the logic state of the U/D input. The CS
input is used to select the device and also store the
wiper position prior to power down.
The digitally programmable potentiometer can be
used as a three-terminal resistive divider or as a
two-terminal variable resistor.
FUNCTIONAL DIAGRAM
DESCRIPTION
The CAT5116 is a log-taper single digitally
programmable potentiometer (DPP™) designed as a
electronic replacement for mechanical potentiometers
and trim pots.
Ideal for automated adjustments on high volume
production lines, DPP ICs are well suited for
applications where equipment requiring periodic
adjustment is either difficult to access or located in a
hazardous or remote environment.
The CAT5116 contains a 100-tap series resistor array
connected between two terminals RH and RL. An up/
down counter and decoder that are controlled by three
input pins, determines which tap is connected to the
wiper, RW.
The wiper setting, stored in nonvolatile memory, is not
lost when the device is powered down and is
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© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice Doc. No. 2118, Rev. H
CAT5116
Log-Taper, 100-Tap Digitally Programmable Potentiometer (DPP™)
GENERAL BLOCK DIAGRAM POTENTIOMETER SCHEMATIC
EEPROM
U/D
INC
CS
INTERFACE
&
WIPER
CONTROL
GND
Potentiometer
R = 32kΩ
R
W
RL
RH
VCC
INCREMENT
UP/DOWN
CHIP SELECT
VCC
RH
RW
RL
POR
GND
U/D
INC
CS
CONTROL
AND
MEMORY
RH
RW
RL
Preliminary Information
CAT5116
2
Doc. No. 2118, Rev. H
PIN DESCRIPTIONS
INCINC
INCINC
INC: Increment Control Input
The INC input moves the wiper in the up or down
direction determined by the condition of the U/D input.
U/DD
DD
D: Up/Down Control Input
The U/D input controls the direction of the wiper
movement. When in a high state and CS is low, any high-
to-low transition on INC will cause the wiper to move one
increment toward the RH terminal. When in a low state
and CS is low, any high-to-low transition on INC will
cause the wiper to move one increment towards the
RL terminal.
RH: High End Potentiometer Terminal
RH is the high end terminal of the potentiometer. It is not
required that this terminal be connected to a potential
greater than the RL terminal. Voltage applied to the RH
terminal cannot exceed the supply voltage, VCC or go
below ground, GND.
RW: Wiper Potentiometer Terminal
RW is the wiper terminal of the potentiometer. Its position
on the resistor array is controlled by the control inputs, INC,
U/D and CS. Voltage applied to the RW terminal cannot
exceed the supply voltage, VCC or go below ground, GND.
RL: Low End Potentiometer Terminal
RL is the low end terminal of the potentiometer. It is not
required that this terminal be connected to a potential
less than the RH terminal. Voltage applied to the RL
terminal cannot exceed the supply voltage, VCC or go
below ground, GND. RL and RH are electrically
interchangeable.
PIN FUNCTIONS
Pin Name Function
INC Increment Control
U/DUp/Down Control
RHPotentiometer High Terminal
GND Ground
RWPotentiometer Wiper Terminal
RLPotentiometer Low Terminal
CS Chip Select
VCC Supply Voltage
PIN CONFIGURATION
DIP Package (P, L) TSSOP Package (U, Y)
MSOP Package (R, Z)
SOIC Package (S, W)
CS
INC VCC
U/D
GND
RHRL
RW
1
2
3
4
8
7
6
5
INC
V
CC
CS
U/D
GND
R
W
R
H
R
L
1
2
3
4
8
7
6
5
CS
INC VCC
U/D
GND
R
H
R
L
R
W
1
2
3
4
8
7
6
5
V
CC
R
R
GND
R
INC
U/DCS
W
L
H
1
2
3
4
8
7
6
5
CSCS
CSCS
CS: Chip Select
The chip select input is used to activate the control input
of the CAT5116 and is active low. When in a high
state, activity on the INC and U/D inputs will not
affect or change the position of the wiper.
3Doc. No. 2118, Rev. H
CAT5116
NOTES: (1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) Latch-up protection is provided for stresses up to 100mA on address and data pins from –1V to VCC + 1V
(3) IW=source or sink
RELIABILITY CHARACTERISTICS
Symbol Parameter Test Method Min Typ Max Units
VZAP(1) ESD Susceptibility MIL-STD-883, Test Method 3015 2000 Volts
ILTH(1)(2) Latch-Up JEDEC Standard 17 100 mA
TDR Data Retention MIL-STD-883, Test Method 1008 100 Years
NEND Endurance MIL-STD-883, Test Method 1003 1,000,000 Stores
Power Supply
Symbol Parameter Conditions Min Typ Max Units
VCC Operating Voltage Range 2.5 5.5 V
ICC1(3) Supply Current (Increment) VCC = 5.5V, f = 1MHz, IW=0 100 µA
VCC = 5.5V, f = 250kHz, IW=0 50
ICC2 Supply Current (Write) Programming, VCC = 5.5V 1 mA
VCC = 3V 500 µA
ISB1Supply Current (Standby) CS=VCC-0.3V 0.01 1 µA
U/D, INC=VCC-0.3V or GND
Symbol Parameter Conditions Min Typ Max Units
IIH Input Leakage Current VIN = VCC 10 µA
IIL Input Leakage Current VIN = 0V -10 µA
VIH1 TTL High Level Input Voltage 4.5V ≤ VCC ≤ 5.5V 2 VCC V
VIL1 TTL Low Level Input Voltage 0 0.8 V
VIH2 CMOS High Level Input Voltage 2.5V ≤ VCC ≤ 5.5V VCC x 0.7 VCC + 0.3 V
VIL2 CMOS Low Level Input Voltage -0.3 VCC x 0.2 V
Logic Inputs
DC ELECTRICAL CHARACTERISTICS: VCC = 2.5V to 5.5V unless otherwise specified.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
VCC to GND ....................................... -0.5V to +7V
Inputs
CS to GND ........................ -0.5V to VCC to +0.5V
INC to GND ....................... -0.5V to VCC to +0.5V
U/D to GND ....................... -0.5V to VCC to +0.5V
RH to GND ......................... -0.5V to VCC to +0.5V
RL to GND ......................... -0.5V to VCC to +0.5V
RW to GND ........................ -0.5V to VCC to +0.5V
Operating Ambient Temperature ........-40°C to +85°C
Junction Temperature (10 secs)..................... +150°C
Storage Temperature...................................... +150°C
Lead Soltering (10 sec max)........................... +300°C
*Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Absolute Maximum
Ratings are limited values applied individually while other param-
eters are within specified operating conditions, and functional
operation at any of these conditions is NOT implied. Device
performance and reliability may be impaired by exposure to
absolute rating conditions for extended periods of time.
CAT5116
4
Doc. No. 2118, Rev. H
Symbol Parameter Conditions Min Typ Max Units
RPOT Potentiometer Resistance 32 kΩ
RTOL Pot Resistance Tolerance ± 20 %
VRH Voltage on RH pin 0 VCC V
VRL Voltage on RL pin 0 VCC V
RV*Relative Variation 0.05
RWi Wiper Resistance VCC = 5V, IW = 1mA 200 400 Ω
VCC = 2.5V, IW = 1mA 400 1000
IWWiper Current 1 mA
TCRPOT TC of Pot Resistance 300 ppm/oC
TCRATIO Ratiometric TC 20 ppm/oC
VNNoise 100kHz / 1kHz 8/24 nV/ Hz
CH/CL/CWPotentiometer Capacitances 8/8/25 pF
fc Frequency Response Passive Attenuator, 10kΩ 1.7 MHz
POTENTIOMETER PARAMETERS
* Relative variation is a measure of the error in step size between taps
= log (VW(N)) - log(VW(N-1)) = 0.045 + 0.003
Symbol Parameter Min Typ(1) Max Units
tCI CS to INC Setup 100 ns
tDI U/D to INC Setup 50 ns
tID U/D to INC Hold 100 ns
tIL INC LOW Period 250 ns
tIH INC HIGH Period 250 ns
tIC INC Inactive to CS Inactive 1 µs
tCPH1 CS Deselect Time (NO STORE) 100 ns
tCPH2 CS Deselect Time (STORE) 10 ms
tIW INC to VOUT Change 1 5 µs
tCYC INC Cycle Time 1 µs
tR, tF(2) INC Input Rise and Fall Time 500 µs
tPU(2) Power-up to Wiper Stable 1 msec
tWR Store Cycle 5 10 ms
AC OPERATING CHARACTERISTICS
VCC = +2.5V to +5.5V, VH = VCC, VL = 0V, unless otherwise specified
AC TEST CONDITIONS
VCC Range 2.5V ≤ VCC ≤ 5.5V
Input Pulse Levels 0.2VCC to 0.7VCC
Input Rise and Fall Times 10ns
Input Reference Levels 0.5VCC
5Doc. No. 2118, Rev. H
CAT5116
Wiper-Low/High Resistances vs. Wiper Position
0
10
20
30
40
50
60
70
80
90
100
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
WIPER POSITION
Total Resistance (%)
RH- RW
RW- RL
Wiper-Low Resistance vs. Wiper Position (log scale)
0.1
1.0
10.0
100.0
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
Total Resistance (%) .
Wiper Resistance vs. Wiper Voltage
0
100
200
300
400
500
600
0123456
WIPER VOLTAGE[V]
WIPER RESISTANCE [ohm]
Vcc = 4.4V
Tap 84
Vcc = 3.0V
Tap 84
Standby Supply Current vs. Temperature
0
20
40
60
80
100
-40 -15 10 35 60 85
STANDBY CURRENT [nA]
.
Vcc = 5 V
Vcc = 2.5 V
TEMPERATURE [°C]
WIPER POSITION
TYPICAL CHARACTERISTICS
VCC = 5V, TAMB = 25°C,unless otherwise specified
CAT5116
6
Doc. No. 2118, Rev. H
AC Timing
CS
INC
U/D
RW
t
CI
t
CYC
t
IL
MI(3)
90% 90%
10%
(store)
t
F
t
R
t
IW
tID
tDI
t
IH
t
CPH
t
IC
(1) Typical values are for TA=25˚C and nominal supply voltage.
(2) This parameter is periodically sampled and not 100% tested.
(3) MI in the AC Timing diagram refers to the minimum incremental change in the W output due to a change in the wiper position.
DEVICE OPERATION
The CAT5116 operates like a digitally controlled
potentiometer with RH and RL equivalent to the high
and low terminals and RW equivalent to the mechanical
potentiometer's wiper. There are 100 tap positions
including the resistor end points, RH and RL. There are
99 resistor elements connected in series between the
RH and RL terminals. The wiper terminal is
connected to one of the 100 taps and is controlled by
three inputs, INC, U/D and CS. These inputs control a
seven-bit up/down counter whose output is decoded to
select the wiper position. The selected wiper position
can be stored in nonvolatile memory using the INC and
CS inputs.
With CS set LOW the CAT5116 is selected and will
respond to the U/D and INC inputs. HIGH to LOW
transitions on INC wil increment or decrement the
wiper (depending on the state of the U/D input and
seven-bit counter). The wiper, when at either fixed
terminal, acts like its mechanical equivalent and does
not move beyond the last position. The value of the
counter is stored in nonvolatile memory whenever CS
transitions HIGH while the INC input is also HIGH. When
the CAT5116 is powered-down, the last stored wiper
counter position is maintained in the nonvolatile memory.
When power is restored, the contents of the memory are
recalled and the counter is set to the value stored.
With INC set low, the CAT5116 may be de-selected
and powered down without storing the current wiper
position in nonvolatile memory. This allows the
system to always power up to a preset value stored
in nonvolatile memory.
OPERATING MODES
Potentiometer
Equivalent Circuit
RL
CL
CH
RH
CW
RW
Rwi
X: High or Low
INCBB CSBB U/DB Operation
High to Low Low High Wiper Toward H
High to Low Low Low Wiper Toward L
High Low to High X Store Wiper Position
Low Low to High X No Store, Return to Standby
X High X Standby
7Doc. No. 2118, Rev. H
CAT5116
ORDERING INFORMATION
Notes:
(1) The device used in the above example is a CAT5116 SI-TE13 (SOIC, Industrial Temperature, Tape & Reel)
Prefix Device # Suffix
5116
Product Number
CAT ITE13
Tape & Reel
TE13: 2000/Reel
S
Package
P: PDIP
S: SOIC
U: TSSOP
R: MSOP
L: PDIP (Lead free, Halogen free)
W: SOIC (Lead free, Halogen free)
Y: TSSOP (Lead free, Halogen free)
Z: MSOP (Lead free, Halogen free)
Optional
Company ID
Copyrights, Trademarks and Patents
Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
DPP ™ AE2 ™
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issued to Catalyst Semiconductor contact the Company’s corporate office at 408.542.1000.
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PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE
RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING
OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or
other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a
situation where personal injury or death may occur.
Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets
labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.
Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate
typical semiconductor applications and may not be complete.
Catalyst Semiconductor, Inc.
Corporate Headquarters
1250 Borregas Avenue
Sunnyvale, CA 94089
Phone: 408.542.1000
Fax: 408.542.1200
www.catalyst-semiconductor.com
Publication #: 2118
Revison: H
Issue date: 3/10/04
Type: Preliminary
REVISION HISTORY
Date Rev. Reason
10/9/2003 G Revised Features
Revised Potentiometer Schematic
Revised DC Electrical Characteristics
Updated Potentiometer Parameters
3/10/2004 H Updated Potentiometer Parameters
