CATALYST CAT5111 Service Manual

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CAT5111

100-Tap Digitally Programmable Potentiometer (DPP™)
with Buffered Wiper

FEATURES

APPLICATIONS

N

E

G

F

O

R

L

A

H

L

E

A

E

E

E

E

TM

R

D

F

■ 100-position linear taper potentiometer

■ Non-volatile NVRAM wiper storage;

buffered wiper

■ Low power CMOS technology

■ Single supply operation: 2.5V-6.0V

■ Increment up/down serial interface

Ω,Ω,

■ Resistance values: 10k

■ Available in PDIP, SOIC, TSSOP and MSOP packages

Ω, 50k

Ω,Ω,

Ω Ω

Ω and 100k

Ω Ω

ΩΩ

Ω

ΩΩ

DESCRIPTION

The CAT5111 is a 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, they are also well suited for
applications where equipment requiring periodic
adjustment is either difficult to access or located in a
hazardous or remote environment.

The CAT5111 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, RWB. The CAT5111 wiper is buffered by an op
amp that operates rail to rail. The wiper setting, stored in
non-volatile NVRAM memory, is not lost when the device
is powered down and is automatically recalled when
power is returned. The wiper can be adjusted to test new

■ Automated product calibration

■ Remote control adjustments

■ Offset, gain and zero control

■ Tamper-proof calibrations

■ Contrast, brightness and volume controls

■ Motor controls and feedback systems

■ Programmable analog functions

system values without effecting the stored
setting. Wiper-control of the CAT5111 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 buffered voltage divider. For applications
where the potentiometer is used as a 2-terminal variable
resistor, please refer to the CAT5113. The buffered
wiper of the CAT5111 is not compatible with that
application. DPPs bring variability and programmability
to a broad range of applications and are used primarily
to control, regulate or adjust a characteristic or parameter
of an analog circuit.

FUNCTIONAL DIAGRAM

V

CC

U/D

INC

CS

© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice

Control

and

Memory

Power On Recall

GND

R

H

R

H

+

R

WB

+

-

R

WB

R

L

Electronic Potentiometer

Implementation

–

R

L

Doc. No. 2008, Rev. O1

CAT5111

PIN CONFIGURATION

PDIP Package (P, L)

1

INC

2

U/D

3

R

H

GND

GND

4

SOIC Package (S, V)

1

INC

2

U/D

3

R

H

4

8
7
6
5

8
7
6
5

V

CS

R
R

V

CS

R
R

CC

L
WB

CC

L
WB

TSSOP Package (U, Y)

1

CS

V

2

CC

3

INC

4

U/D

MSOP Package (R, Z)

1

INC

2

U/D

3

R

H

GND

4

R

8

L

7

R

WB

6

GND

5

R

H

8

V

CC

7

CS

6

R

L

5

R

WB

PIN DESCRIPTIONS

INCINC

INC: Increment Control Input

INCINC

The INC input (on the falling edge) moves the wiper in the
up or down direction determined by the condition of the
U/D input.

DD

U/

D: Up/Down Control Input

DD

The U/D input controls the direction of the wiper
movement. When in a high state and CS is low, any high­to-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.

R

High End Potentiometer Terminal

H:

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 R
terminal cannot exceed the supply voltage, VCC or go
below ground, GND.

RWB: Wiper Potentiometer Terminal (Buffered)

RWB is the buffered wiper terminal of the potentiometer. Its
position on the resistor array is controlled by the control
inputs, INC, U/D and CS.

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 R
terminal cannot exceed the supply voltage, VCC or go
below ground, GND. RL and RH are electrically
interchangeable.

CSCS

CS: Chip Select

CSCS

The chip select input is used to activate the control input

PIN FUNCTIONS

Pin Name Function

INC Increment Control
U/D Up/Down Control
R

H

Potentiometer High Terminal
GND Ground
R

WB

R

L

Buffered Wiper Terminal

Potentiometer Low Terminal
CS Chip Select
V

CC

Supply Voltage

of the CAT5111 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.

DEVICE OPERATION

The CAT5111 operates like a digitally controlled
potentiometer with RH and RL equivalent to the high
and low terminals and RWB equivalent to the mechanical
potentiometer's wiper. There are 100 available 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 controlled by three
inputs, INC, U/D and CS. These inputs control a seven­bit 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.

H

With CS set LOW the CAT5111 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 CAT5111 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

L

recalled and the counter is set to the value stored.
With INC set low, the CAT5111 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.

Doc. No. 2008, Rev. O

2

CAT5111

OPERATING MODES

INCCC CSCC U/DC Operation

High to Low Low High Wiper toward R
High to Low Low Low Wiper toward R

H
L

High Low to High X Store Wiper Position
Low Low to High X No Store, Return to Standby
X High X Standby

ABSOLUTE MAXIMUM RATINGS

Supply Voltage

VCC to GND –0.5V to +7V

Inputs

CS to GND –0.5V to V
INC to GND –0.5V to V

U/D to GND –0.5V to V
RH to GND –0.5V to V
RL to GND –0.5V to V
RWB to GND –0.5V to V

RELIABILITY CHARACTERISTICS

CC
CC
CC
CC
CC
CC

+0.5V
+0.5V
+0.5V
+0.5V
+0.5V
+0.5V

Operating Ambient Temperature

Commercial (‘C’ or Blank suffix) 0°C to +70°C

Industrial (‘I’ suffix) – 40°C to +85°C
Junction Temperature +150°C
Storage Temperature –65°C to +150°C
Lead Soldering (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 parameters 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.

R

H

C

H

C

L

R

wi

R

WB

C

W

Potentiometer

R

L

Equivalent Circuit

Symbol Parameter Test Method Min Typ Max Units

(1)

V
I
T
N

ZAP

LTH

DR
END

(1)(2)

ESD Susceptibility MIL-STD-883, Test Method 3015 2000 Volts
Latch-Up JEDEC Standard 17 100 mA
Data Retention MIL-STD-883, Test Method 1008 100 Years
Endurance MIL-STD-883, Test Method 1003 1,000,000 Stores

DC Electrical Characteristics: VCC = +2.5V to +6.0V unless otherwise specified

Power Supply

Symbol Parameter Conditions Min Typ Max Units

V

CC

I

CC1

I

CC2

ISB

(2)

1

Operating Voltage Range 2.5 — 6.0 V
Supply Current (Increment) VCC = 6V, f = 1MHz, IW=0 ——200 µA

= 6V, f = 250kHz, IW=0 ——100

V

CC

Supply Current (Write) Programming, VCC = 6V ——1mA

VCC = 3V ——500 µA

Supply Current (Standby) CS=VCC-0.3V — 75 150 µA

U/D, INC=VCC-0.3V or GND

Logic Inputs

Symbol Parameter Conditions Min Typ Max Units

I

IH

I

IL

V

IH1

V

IL1

V

IH2

V

IL2

Input Leakage Current VIN = V

CC

——10 µA
Input Leakage Current VIN = 0V ——–10 µA
TTL High Level Input Voltage 4.5V ≤ VCC ≤ 5.5V 2 — V

CC

V

TTL Low Level Input Voltage 0 — 0.8 V
CMOS High Level Input Voltage 2.5V ≤ VCC ≤ 6V VCC x 0.7 — VCC + 0.3 V
CMOS Low Level Input Voltage -0.3 — VCC x 0.2 V

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

=source or sink

(3) I

W

(4) These parameters are periodically sampled and are not 100% tested.

3

Doc. No. 2008, Rev. O

CAT5111

Potentiometer Parameters

Symbol Parameter Conditions Min Typ Max Units
R

POT

Potentiometer Resistance -10 Device 10

-50 Device 50 kΩ

-00 Device 100

Pot Resistance Tolerance ±20 %
V
V

RH

RL

Voltage on RH pin 0 V

Voltage on RL pin 0 V

CC
CC

V

V

Resolution 1 %
INL Integral Linearity Error IW ≤ 2µA 0.5 1 LSB
DNL Differential Linearity Error IW ≤ 2µA 0.25 0.5 LSB
R

OUT

I

OUT

TC

RPOT

TC

RATIO

R

ISO

CRH/CRL/CRW

Buffer Output Resistance .05V

Buffer Output Current .05V

≤ V

CC

CC

≤ .95VCC, VCC=5V 1 Ω

WB

≤ VWB≤ .95VCC, VCC=5V 3 mA

TC of Pot Resistance 300 ppm/oC

Ratiometric TC TBD ppm/oC

Isolation Resistance TBD Ω

Potentiometer Capacitances 8/8/25 pF
fc Frequency Response Passive Attenuator, 10kΩ 1.7 MHz
V

WB(SWING)

Output Voltage Range I

≤100µA, VCC=5V 0.01V

OUT

CC

.99V

CC

Doc. No. 2008, Rev. O

4

AC CONDITIONS OF TEST

VCC Range 2.5V ≤ VCC ≤ 6V

CAT5111

Input Pulse Levels 0.2VCC to 0.7V

CC

Input Rise and Fall Times 10ns
Input Reference Levels 0.5V

CC

AC OPERATING CHARACTERISTICS:

VCC = +2.5V to +6.0V, VH = VCC, VL = 0V, unless otherwise specified

Symbol Parameter Min Typ

t

CI

t

DI

t

ID

t

IL

t

IH

t

IC

t

CPH

t

CPH

t

IW

t

CYC

t

R, tF

t

PU

t

WR

(2)

(2)

CS to INC Setup 100 ——ns
U/D to INC Setup 50 ——ns
U/D to INC Hold 100 ——ns

INC LOW Period 250 ——ns
INC HIGH Period 250 ——ns
INC Inactive to CS Inactive 1 ——µs
CS Deselect Time (NO STORE) 100 ——ns
CS Deselect Time (STORE) 10 ——ms
INC to V

Change — 15µs

OUT

INC Cycle Time 1 ——µs
INC Input Rise and Fall Time —— 500 µs

Power-up to Wiper Stable —— 1 msec
Store Cycle — 510ms

(1)

Max Units

A. C. TIMING

CS

t

t

CI

CYC

t

IL

t

IH

t

IC

INC

tID

tDI

U/D

t

IW

R

WB

(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 A.C. Timing diagram refers to the minimum incremental change in the W output due to a change in the wiper position.

(store)

t

CPH

90% 90%

t

F

10%

t

R

(3)

MI

5

Doc. No. 2008, Rev. O

CAT5111

ORDERING INFORMATION

Prefix Device # Suffix

CAT

Optional
Company ID

5111

Product Number

5111: Buffered
5113: Unbuffered

S

I

-10

Resistance

-10: 10kohms

-50: 50kohms

-00: 100kohms

TE13

Tape & Reel

SOIC: 2000/Reel
TSSOP: 2000/Reel
MSOP: 2500/Reel

Package

P: PDIP
S: SOIC
U: TSSOP
R:

MSOP

L: PDIP (Lead free, Halogen free)
V: SOIC (Lead free, Halogen free)
Y: TSSOP (Lead free, Halogen free)
Z: MSOP (Lead free, Halogen free)

Notes:
(1) The device used in the above example is a CAT5111 SI-10TE13 (SOIC, 10K Ohms, Industrial Temperature, Tape & Reel)

Doc. No. 2008, Rev. O

6

REVISION HISTORY

Date Rev. Reason

3/10/2004 M Updated Potentiometer Parameters
3/29/2004 N Changed Green Package marking for SOIC from W to V
4/12/2004 O Updated Reel Ordering Information

Copyrights, Trademarks and Patents

Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:

CAT5111

DPP ™ AE2 ™
Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. For a complete list of patents

issued to Catalyst Semiconductor contact the Company’s corporate office at 408.542.1000.

CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS
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: [phone]
Fax: [phone]
www.catalyst-semiconductor.com

Publication #: 2002
Revison: O
Issue date: 4/12/04

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Doc. No. 2008, Rev. O