CATALYST CAT5114 Service Manual

CAT5114

32-Tap Digitally Programmable Potentiometer (DPP™)

FEATURES

 32-position linear taper potentiometer
 Non-volatile EEPROM wiper storage
 Low standby current
 Single supply operation: 2.5V – 6V
 Increment up/down serial interface
 Resistance values: 10kΩ, 50kΩ and 100kΩ
 Available in PDIP, SOIC, TSSOP, MSOP and

space saving 2 x 2.5mm TDFN packages

APPLICATIONS

 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

For Ordering Information details, see page 14.

DESCRIPTION

The CAT5114 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 CAT5114 contains a 32-tap series resistor array
connected between two terminals R
down counter and decoder that are controlled by three
input pins, determines which tap is connected to the
wiper, R

. The wiper setting, stored in nonvolatile

W

memory, is not lost when the device is powered down
and is automatically reinstated when power is
returned. The wiper can be adjusted to test new
system values without affecting the stored setting.
Wiper-control of the CAT5114 is accomplished with
three input control pins, CS¯¯, U/D¯, and 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 two­terminal variable resistor. DPPs bring variability and
programmability to a wide variety of applications
including control, parameter adjustments, and signal
processing.

and RL. An up/

H

¯¯¯

¯¯¯

. The INC

FUNCTIONAL DIAGRAM

R

H/VH

RL/V

L

RW/V

W

Electronic Potentiometer

Implementation

RH/V

RW/V

RL/V

H

W

L

32-POSITION

DECODER

DetailedGeneral

31

30

29

28

TRANSFER

GATES

2

1

0

RESISTOR

ARRAY

U/D
INC

H/VH

CS

W

L

V

CC

GND

V

CC

R

U/D

INC

CS

© Catalyst Semiconductor, Inc. 1 Doc. No. MD-2007 Rev. P
Characteristics subject to change without notice

Control

and

Memory

Power On Recall

GND

RW/V

RL/V

5-BIT
UP/DOWN
COUNTER

5-BIT

NONVOLATILE

MEMORY

STORE AND

RECALL

CONTROL

CIRCUITRY

CAT5114

8

7

6

5

8

7

6

5

PIN CONFIGURATION

PDIP 8-Lead (L), SOIC 8-Lead (V),

MSOP 8-Lead (Z)

¯¯¯

TSSOP 8-Lead (Y)

¯¯

1

CS

2

VCC

CAT

¯¯¯

3

INC

4

U/D¯

GND

R

R

GND

R

INC

U/D¯

R

L

WB

H

1
2

CAT

3

H

4

V

CC

¯¯

CS

R

L

R

WB

TDFN 8-Pad

(ZD7, VP2)

¯¯¯

1

INC

2

U/D¯

3

R

H

4

GND

Top View

8

VCC

¯¯

7

CS

6

R

L

5

R

WB

PIN FUNCTION

¯¯¯

INC

: Increment Control Input

¯¯¯

The INC
direction determined by the condition of the U/D¯ input.

U/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
move one increment toward the R
a low state and CS¯¯ is low, any high-to-low transition
on INC
towards the R

R

H

R

H

not required that this terminal be connected to a
potential greater than the R
to the R
V

CC

R

W

R

W

position on the resistor array is controlled by the
control inputs, INC

the R
V

CC

R

L

R

L

required that this terminal be connected to a potential less
than the R
cannot exceed the supply voltage, V
ground, GND. R

CS¯¯: Chip Select
The chip select input is used to activate the control

input of the CAT5114 and is active low. When in a

input moves the wiper in the up or down

¯¯¯

will cause the wiper to

terminal. When in

H

¯¯¯

will cause the wiper to move one increment

terminal.

L

: High End Potentiometer Terminal
is the high end terminal of the potentiometer. It is

terminal. Voltage applied

L

terminal cannot exceed the supply voltage,

H

or go below ground, GND.

: Wiper Potentiometer Terminal
is the wiper terminal of the potentiometer. Its

¯¯¯

, U/D¯ and CS¯¯. Voltage applied to

terminal cannot exceed the supply voltage,

W

or go below ground, GND.

: Low End Potentiometer Terminal

is the low end terminal of the potentiometer. It is not

terminal. Voltage applied to the RL terminal

H

or go below

CC

and RH are electrically interchangeable.

L

PIN DESCRIPTIONS

Name Function

¯¯¯

Increment Control

INC

Up/Down Control

U/D¯

RH Potentiometer High Terminal

GND Ground

RW Wiper Terminal

RL Potentiometer Low Terminal
¯¯

CS

Chip Select

VCC Supply Voltage

high state, activity on the INC

¯¯¯

and U/D¯ inputs will not

affect or change the position of the wiper.

DEVICE OPERATION

The CAT5114 operates like a digitally controlled

potentiometer with R
and low terminals and R
nical potentiometer's wiper. There are 32 available tap
positions including the resistor end points, R
There are 31 resistor elements connected in series
between the R

H

is connected to one of the 32 taps and controlled by
three inputs, INC

¯¯¯

seven-bit up/down counter whose output is decoded
to select the wiper position. The selected wiper
position can be stored in non-volatile memory using

¯¯¯

the INC

and CS¯¯ inputs.

With CS¯¯ set LOW the CAT5114 is selected and will
respond to the U/D¯ and INC
transitions on INC

¯¯¯

(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
CAT5114 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 CAT5114 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 non

volatile memory.

and RL equivalent to the high

H

equivalent to the mecha–

W

and RL.

H

and RL terminals. The wiper terminal

, U/D¯ and CS¯¯. These inputs control a

¯¯¯

inputs. HIGH to LOW

wil increment or decrement the wiper

¯¯¯

input is also HIGH. When the

-

Doc. No. MD-2007 Rev. P 2 © Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

OPERATION MODES

t

¯¯¯

INC

CS¯¯ U/D¯

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

CAT5114

R

H

C

H

C

L

R

WI

R

W

C

W

R

L

Potentiometer
Equivalent Circui

ABSOLUTE MAXIMUM RATINGS

(1)

Parameters Ratings Units Parameters Ratings Units

Supply Voltage Operating Ambient Temperature
VCC to GND -0.5 to +7V V Industrial (‘I’ suffix) -40 to +85 ºC
Inputs Junction Temperature +150 ºC

CS¯¯ to GND
¯¯¯

INC
U/D¯ to GND

to GND

-0.5 to VCC +0.5 V Storage Temperature -65 to 150 ºC

-0.5 to VCC +0.5 V Lead Soldering (10s max) +300 ºC

-0.5 to VCC +0.5 V
H to GND -0.5 to VCC +0.5 V
L to GND -0.5 to VCC +0.5 V
W to GND -0.5 to VCC +0.5 V

RELIABILITY CHARACTERISTICS

Symbol Parameter Test Method Min Typ Max Units

(2)

V

ESD Susceptibility MIL-STD-883, Test Method 3015 2000

ZAP

(2)(3)

I

LTH

Latch-Up JEDEC Standard 17 100

TDR Data Retention MIL-STD-883, Test Method 1008 100

N

Endurance MIL-STD-883, Test Method 1003 1,000,000

END

Years

Stores

V

mA

DC ELECTRICAL CHARACTERISTICS

= +2.5V to +6V unless otherwise specified

V

CC

Power Supply

Symbol Parameter Conditions Min Typ Max Units

VCC Operating Voltage Range 2.5 – 6.0 V

I

Supply Current (Increment)

CC1

I

Supply Current (Write)

CC2

(3)

I

Supply Current (Standby)

SB1

Notes

(1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this

specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.
(2) This parameter is tested initially and after a design or process change that affects the parameter.
(3) Latch-up protection is provided for stresses up to 100mA on address and data pins from -1V to V

= source or sink.

(4) I

W

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

© Catalyst Semiconductor, Inc. 3 Doc. No. MD-2007 Rev. P
Characteristics subject to change without notice

VCC = 6V, f = 1MHz, IW = 0 – – 100 µA
V

= 6V, f = 250kHz, IW = 0 – – 50 µA

CC

Programming, VCC = 6V – – 1000 µA
V

= 3V – – 500 µA

CC

CS¯¯ = V
U/D¯, INC

CC

¯¯¯

- 0.3V

= V

- 0.3V or GND

CC

– – 1 µA

+ 1V.

CC

CAT5114

Logic Inputs

Symbol Parameter Conditions Min Typ Max Units

IIH Input Leakage Current VIN = VCC – – 10 µA
IIL Input Leakage Current VIN = 0V – – -10 µA

V

CMOS High Level Input Voltage VCC x 0.7 – VCC + 0.3 V

IH2

V

CMOS Low Level Input Voltage

IL2

2.5V  V

Potentiometer Characteristics

Symbol Parameter Conditions Min Typ Max Units

-10 Device 10

R

Potentiometer Resistance

POT

-50 Device 50

-00 Device 100

Pot. Resistance Tolerance ±20 %

V

Voltage on RH pin 0 VCC V

RH

V

Voltage on RL pin 0 VCC V

RL

Resolution 3.2 %

INL Integral Linearity Error IW  2µA 0.5 1 LSB

DNL Differential Linearity Error IW  2µA 0.25 0.5 LSB

RWI Wiper Resistance

VCC = 5V, IW = 1mA 70 200 
V

= 2.5V, IW = 1mA 150 400 

CC

IW Wiper Current -4.4 4.4 mA
TC
TC

TC of Pot Resistance 300 ppm/ºC

RPOT

Ratiometric TC 20 ppm/ºC

RATIO

V

N

Noise 100kHz / 1kHz 8/24 nV/Hz

CH/CL/CW Potentiometer Capacitances 8/8/25 pF

fc Frequency Response Passive Attenuator, 10k 1.7 MHz

 6V

CC

-0.3 – V

x 0.2 V

CC

k

Doc. No. MD-2007 Rev. P 4 © Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

AC CONDITIONS OF TEST

Range 2.5V  VCC  6V

V

CC

Input Pulse Levels 0.2VCC to 0.7VCC
Input Rise and Fall Times 10ns
Input Reference Levels 0.5VCC

AC OPERATING CHARACTERISTICS

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

V

CC

(1)

Symbol Parameter Min Typ

tCI
tDI
tID

tIL
tIH
tIC

t

CPH

t

CPH

tIW

t

CYC

(2)

tR, t

F
(2)

t

Power-up to Wiper Stable – – 1 ms

PU

¯¯¯

CS¯¯ to INC
U/D¯ to INC
U/D¯ to INC
¯¯¯

INC
¯¯¯

INC
¯¯¯

INC

Setup

¯¯¯

Setup

¯¯¯

Hold
LOW Period
HIGH Period
Inactive to CS¯¯ Inactive

CS¯¯ Deselect Time (NO STORE)
CS¯¯ Deselect Time (STORE)
¯¯¯

INC

to V

¯¯¯

INC

Cycle Time

¯¯¯

INC

Input Rise and Fall Time

Change

OUT

100 – – ns

50 – – ns
100 – – ns
250 – – ns
250 – – ns

1 – – µs

100 – – ns

10 – – ms

– 1 5 µs
1 – – µs
– – 500 µs

Max Units

tWR Store Cycle – 5 10 ms

CAT5114

A.C. TIMING

CS

t

t

CI

INC

U/D

t

IW

R

W

CYC

t

IL

t

IH

tDIt

ID

t

IC

(store)

t

CPH

90% 90%

t

F

10%

t

R

(3)

MI

Notes

(1) Typical values are for T
(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.

= 25ºC and nominal supply voltage.

A

© Catalyst Semiconductor, Inc. 5 Doc. No. MD-2007 Rev. P
Characteristics subject to change without notice