CAT523LI_技术文档

CAT523

Dual Digitally Programmable Potentiometer (DPP™) with

256 Taps and Microwire Interface

FEATURES

DESCRIPTION

Two 8-bit DPPs configured as programmable

The CAT523 is a dual, 8-bit digitally-programmable

potentiometer (DPP™) configured for programmable

voltage and DAC-like applications. Intended for final

calibration of products such as camcorders, fax

machines and cellular telephones on automated high

volume production lines, it is also well suited for

systems capable of self calibration, and applications

where equipment which is either difficult to access or in a

hazardous environment, requires periodic adjustment.

voltage sources in DAC-like applications

Common reference inputs

Non-volatile NVRAM memory wiper storage

Output voltage range includes both supply rails

2 independently addressable buffered

output wipers

1 LSB accuracy, high resolution

Serial microwire-like interface

The two independently programmable DPPs have a

common output voltage range which includes both

supply rails. The wipers are buffered by rail to rail op

amps. Wiper settings, stored in non-volatile NVRAM

memory, are not lost when the device is powered

down and are automatically reinstated when power is

returned. Each wiper can be dithered to test new

output values without effecting the stored settings and

stored settings can be read back without disturbing

the DPP’s output.

Single supply operation: 2.7V - 5.5V

Setting read-back without effecting outputs

For Ordering Information details, see page 12.

APPLICATIONS

Control of the CAT523 is accomplished with a simple

3-wire, Microwire-like serial interface. A Chip Select

pin allows several CAT523's to share a common serial

interface and communication back to the host

controller is via a single serial data line thanks to the

CAT523’s Tri-Stated Data Output pin. A RDY/¯B¯S¯Y¯

output working in concert with an internal low voltage

detector signals proper operation of non-volatile

NVRAM memory Erase/Write cycle.

Automated product calibration.

Remote control adjustment of equipment

Offset, gain and zero adjustments in self-

calibrating and adaptive control systems.

Tamper-proof calibrations.

DAC (with memory) substitute

PIN CONFIGURATION

The CAT523 is available in the 0°C to 70°C

Commercial and -40°C to + 85°C Industrial operating

temperature ranges and offered in 14-pin plastic DIP

and SOIC mount packages.

PDIP 14-Lead (L)

SOIC 14-Lead (W)

V_DD

1

2

3

4

5

6

7

14 V_REFH

13 V_OUT1

12 V_OUT2

11 NC

CLK

¯¯¯¯

RDY/BSY

CAT523

CS

DI

10 NC

DO

9

8

V_REFL

GND

PROG

Characteristics subject to change without notice

1

Doc. No. MD-2005 Rev. G

CAT523

FUNCTIONAL DIAGRAM

V

DD

1

REFH

14

3

RDY/BSY

PROGRAM

CONTROL

7

PROG

+

–

13

12

V

OUT1

OUT2

5

DI

+

–

2

SERIAL

CONTROL

CLK

4

CS

SERIAL

DATA

OUTPUT

REGISTER

6

DO

CAT523

8

9

GND

V

REFL

Doc. No. MD-2005 Rev. G

2

Characteristics subject to change without notice

CAT523

ABSOLUTE MAXIMUM RATINGS

Parameters

Supply Voltage⁽¹⁾

V_DDto GND

Inputs

Ratings

Parameters

Outputs

Ratings

Units

V

-0.5 to V_DD+0.5

V

-0.5 to +7

D₀to GND

V_OUT1– 4 to GND

CLK to GND

CS to GND

DI to GND

-0.5 to V_DD+0.5

V

Operating Ambient Temperature

Commercial

0 to +70

°C

(‘C’ or Blank suffix)

Industrial (‘I’ suffix)

Junction Temperature

Storage Temperature

Lead Soldering (10 sec max)

-40 to +85

+150

°C

¯¯¯¯

RDY/BSY to GND

PROG to GND

V_REFHto GND

V_REFLto GND

-65 to +150

+300

RELIABILITY CHARACTERISTICS

Symbol

Parameter

Test Method

Min Max Units

(2)

V_ZAP

ESD Susceptibility

Latch-Up

MIL-STD-883, Test Method 3015

JEDEC Standard 17

2000

100

V

(2)(3)

I_LTH

mA

POWER SUPPLY

Symbol

I_DD1

Parameter

Conditions

Min

—

Typ

Max Units

Supply Current (Read)

Supply Current (Write)

Normal Operating

Programming, V_DD= 5V

V_DD= 3V

400

600

µA

V

I_DD2

—

1600 2500

1000 1600

—

V_DD

Operating Voltage Range

2.7

—

5.5

LOGIC INPUTS

Symbol

Parameter

Conditions

V_IN= V_DD

V_IN= 0V

Min

—

2

Typ

—

Max Units

I_IH

I_IL

Input Leakage Current

High Level Input Voltage

Low Level Input Voltage

10

-10

V_DD

0.8

µA

V

—

V_IH

V_IL

—

0

—

V

LOGIC OUTPUTS

Symbol

V_OH

Parameter

High Level Output Voltage

Low Level Output Voltage

Conditions

Min

Typ

—

Max Units

I_OH= -40µA

V_DD-0.3

—

V

V_IL

I_OL= 1mA, V_DD= +5V

I_OL= 0.4mA, V_DD= +3V

—

0.4

—

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_CC+ 1V.

Characteristics subject to change without notice

3

Doc. No. MD-2005 Rev. G

CAT523

POTENTIOMETER CHARACTERISTICS

V_DD= +2.7V to +5.5V, V_REFH= V_DD, V_REFL= 0V, unless otherwise specified

Symbol Parameter

Conditions

Min

Typ

24

Max

Units

kΩ

Potentiometer Resistance

See note 3

R_POT

R_POTto RPOT Match

Pot Resistance Tolerance

Voltage on V_REFHpin

Voltage on V_REFLpin

Resolution

—

±0.5

±1

±20

%

2.7

0

V_DD

V

V_DD- 2.7

V

0.4

0.5

%

INL

DNL

Integral Linearity Error

Differential Linearity Error

Buffer Output Resistance

Buffer Output Current

TC of Pot Resistance

Potentiometer Capacitances

1

0.5

10

3

LSB

Ω

0.25

R_OUT

I_OUT

mA

ppm/ºC

pF

TC_RPOT

C_H/C_L

300

8/8

AC ELECTRICAL CHARACTERISTICS

V_DD= +2.7V to +5.5V, V_REFH= V_DD, V_REFL= 0V, unless otherwise specified

Symbol Parameter

Digital

Conditions

Min

Typ

Max

Units

t_CSMIN

t_CSS

t_CSH

t_DIS

Minimum CS Low Time

150

100

0

—

400

4

—

150

—

5

ns

CS Setup Time

CS Hold Time

ns

DI Setup Time

50

ns

C_L= 100pF ⁽¹⁾

t_DIH

DI Hold Time

50

ns

t_DO1

t_DO0

t_HZ

Output Delay to 1

Output Delay to 0

Output Delay to High-Z

Output Delay to Low-Z

Erase/Write Cycle Time

PROG Setup Time

Minimum Pulse Width

Minimum CLK High Time

Minimum CLK Low Time

Clock Frequency

—

ns

—

ns

—

ns

t_LZ

—

ns

t_BUSY

t_PS

—

ms

ns

150

700

500

300

DC

—

1

t_PROG

ns

t_CLK

f_C

H

ns

L

ns

MHz

Analog

t_DS

DPP Settling Time to 1 LSB

C_LOAD= 10pF, V_DD= +5V

C_LOAD= 10pF, V_DD= +3V

—

3

6

10

µs

Notes:

(1) All timing measurements are defined at the point of signal crossing V_DD/ 2.

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

(3) The 24kΩ +20% resistors are configured as 4 resistors in parallel which would provide a measured value between V_REFHand V_REFLof 6kΩ

+20%. The individual 24kΩ resistors are not measurable but guaranteed by design and verification of the 6kΩ +20% value.

Doc. No. MD-2005 Rev. G

4

Characteristics subject to change without notice

CAT523

A.C. TIMING DIAGRAM

t

1

2

3

4

5

o

t

H

CLK

CS

DI

t

L

t

CSH

CSS

CLK

t

CSMIN

t

DIS

t

DIH

t

DO0

t

LZ

DO

t

HZ

t

DO1

PROG

t

PS

t

PROG

RDY/BSY

t

BUSY

4

t

1

2

3

5

o

Characteristics subject to change without notice

5

Doc. No. MD-2005 Rev. G

CAT523

PIN DESCRIPTION

1

Name

V_DD

Function

DPP addressing is as follows:

Power supply positive

Clock input pin

DPP OUTPUT

V_OUT1

A0 A1

2

CLK

0

1

0

¯¯¯¯

RDY/BSY

3

Ready/Busy output

Chip select

V_OUT2

4

CS

DI

5

Serial data input pin

Serial data output pin

6

DO

EEPROM Programming Enable

Input

7

PROG

8

GND

V_REFL

NC

Power supply ground

Minimum DAC output voltage

No Connect

9

10

11

12

13

14

NC

No Connect

V_OUT2

V_OUT1

V_REFH

DPP output channel 2

DPP output channel 1

Maximum DPP output voltage

Multiple devices may share a common input data line

by selectively activating the CS control of the desired

IC. Data Outputs (DO) can also share a common line

because the DO pin is Tri-Stated and returns to a high

impedance when not in use.

DEVICE OPERATION

The CAT523 is a dual 8-bit configured digitally

programmable potentiometer (DPP) whose outputs

can be programmed to any one of 256 individual

voltage steps.

Once programmed, these output

CHIP SELECT

settings are retained in non-volatile memory and will

not be lost when power is removed from the chip.

Upon power up the DPPs return to the settings stored

in non-volatile memory. Each DPP can be written to

and read from independently without effecting the

output voltage during the read or write cycle. Each

output can also be temporarily adjusted without

changing the stored output setting, which is useful for

testing new output settings before storing them in

memory.

Chip Select (CS) enables and disables the CAT523’s

read and write operations. When CS is high data may

be read to or from the chip, and the Data Output (DO)

pin is active. Data loaded into the DPP control

registers will remain in effect until CS goes low.

Bringing CS to a logic low returns all DPP outputs to

the settings stored in non-volatile memory and

switches DO to its high impedance Tri-State mode.

Because CS functions like a reset the CS pin has

been equipped with a 30 ns to 90 ns filter circuit to

prevent noise spikes from causing unwanted resets

and the loss of volatile data.

DIGITAL INTERFACE

The CAT523 employs a 3 wire, Microwire-like, serial

control interface consisting of Clock (CLK), Chip

Select (CS) and Data In (DI) inputs. For all ope–

rations, address and data are shifted in LSB first. In

addition, all digital data must be preceded by a logic

“1” as a start bit. The DPP address and data are

clocked into the DI pin on the clock’s rising edge.

When sending multiple blocks of information a

minimum of two clock cycles is required between the

last block sent and the next start bit.

CLOCK

The CAT523’s clock controls both data flow in and out

of the IC and non-volatile memory cell programming.

Serial data is shifted into the DI pin and out of the DO

pin on the clock’s rising edge. While it is not

necessary for the clock to be running between data

transfers, the clock must be operating in order to write

to non-volatile memory, even though the data being

saved may already be resident in the DPP wiper

control register.

Doc. No. MD-2005 Rev. G

6

Characteristics subject to change without notice

CAT523

¯¯¯¯

No clock is necessary upon system power-up. The

CAT523’s internal power-on reset circuitry loads data

from non-volatile memory to the DPPs without using

the external clock.

RDY/BSY will remain high following the program

command indicating a failure to record the desired

data in non-volatile memory.

DATA OUTPUT

As data transfers are edge triggered clean clock

transitions are necessary to avoid falsely clocking

data into the control registers. Standard CMOS and

TTL logic families work well in this regard and it is

recommended that any mechanical switches used for

breadboarding or device evaluation purposes be

debounced by a flip-flop or other suitable debouncing

circuit.

Data is output serially by the CAT523, LSB first, via

the Data Out (DO) pin following the reception of a

start bit and two address bits by the Data Input (DI).

DO becomes active whenever CS goes high and

resumes its high impedance Tri-State mode when CS

returns low. Tri-Stating the DO pin allows several

523s to share a single serial data line and simplifies

interfacing multiple 523s to a microprocessor.

V_REF

WRITING TO MEMORY

V_REF, the voltage applied between pins V_REFH& V_REFL,

Programming the CAT523’s non-volatile memory is

accomplished through the control signals: Chip Select

(CS) and Program (PROG). With CS high, a start

bitfollowed by a two bit DPP address and eight data

bits are clocked into the DPP control register via the

DI pin. Data enters on the clock’s rising edge. The

DPP output changes to its new setting on the clock

cycle following D7, the last data bit.

sets the DPP’s Zero to Full Scale output range where

V_REFL= Zero and V_REFH= Full Scale. V_REFcan span

the full power supply range or just a fraction of it. In

typical applications V_REFH& V_REFLare connected

across the power supply rails. When using less than

the full supply voltage V_REFHis restricted to voltages

between V_DDand V_DD/2 and V_REFLto voltages between

GND and V_DD/2.

Programming is achieved by bringing PROG high

sometime after the start bit and at least 150 ns prior to

the rising edge of the clock cycle immediately

following the D7 bit. Two clock cycles after the D7 bit

the DAC control register will be ready to receive the

next set of address and data bits. The clock must be

kept running throughout the programming cycle.

Internal control circuitry takes care of ramping the

programming voltage for data transfer to the non-

volatile memory cells. The CAT523’s non-volatile

memory cells will endure over 100,000 write cycles

and will retain data for a minimum of 100 years

without being refreshed.

¯¯¯¯¯

READY/BUSY

When saving data to non-volatile memory, the

Ready/Busy output (RDY/BSY) signals the start and

duration of the non-volatile erase/write cycle. Upon

receiving a command to store data (PROG goes high)

¯¯¯¯

RDY/BSY goes low and remains low until the

programming cycle is complete. During this time the

CAT523 will ignore any data appearing at DI and no

data will be output on DO.

¯¯¯¯

RDY/BSY is internally ANDed with a low voltage

detector circuit monitoring V_DD.If V_DDis below the

minimum value required for non-volatile programming,

Figure 1. Writing to Memory

t

1

2

3

4

5

6

7

8

9

10

11 12

N

N+1 N+2

o

CS

DI

NEW DPP DATA

1

A0 A1 D0 D1 D2 D3 D4 D5 D6 D7

CURRENT DPP DATA

DO

PROG

D0 D1 D2 D3 D4 D5 D6 D7

RDY/BSY

DPP

OUTPUT

CURRENT

DPP VALUE

NEW

DPP VALUE

NEW

DPP VALUE

NON-VOLATILE

VOLATILE

NON-VOLATILE

Characteristics subject to change without notice

7

Doc. No. MD-2005 Rev. G

CAT523

READING DATA

TEMPORARILY CHANGE OUTPUT

Each time data is transferred into a DPP wiper control

register currently held data is shifted out via the D0

pin, thus in every data transaction a read cycle

occurs. Note, however, that the reading process is

destructive. Data must be removed from the register

in order to be read. Figure 2 depicts a Read Only

cycle in which no change occurs in the DPP’s output.

This feature allows µPs to poll DPPs for their current

setting without disturbing the output voltage but it

assumes that the setting being read is also stored in

non-volatile memory so that it can be restored at the

end of the read cycle. In Figure 2 CS returns low

before the 13^thclock cycle completes. In doing so the

non-volatile memory setting is reloaded into the DPP

wiper control register.

The CAT523 allows temporary changes in DPP’s

output to be made without disturbing the settings

retained in non-volatile memory. This feature is

particularly useful when testing for a new output

setting and allows for user adjustment of preset or

default values without losing the original factory

settings.

Figure 3 shows the control and data signals needed

to effect a temporary output change. DPP wiper

settings may be changed as many times as required

and can be made to any of the two DPPs in any order

or sequence. The temporary setting(s) remain in

effect long as CS remains high. When CS returns low

all two DPPs will return to the output values stored in

non-volatile memory.

Since this value is the same as that which had been

there previously no change in the DPP’s output is

noticed. Had the value held in the control register

been different from that stored in non-volatile memory

then a change would occur at the read cycle’s

conclusion.

When it is desired to save a new setting acquired

using this feature, the new value must be reloaded

into the DPP wiper control register prior to

programming. This is because the CAT523’s internal

control circuitry discards the new data from the

programming register two clock cycles after receiving

it (after reception is complete) if no PROG signal is

received.

Figure 2. Reading from Memory

Figure 3. Temporary Change in Output

t

1

2

3

4

5

6

7

8

9

10

11 12

t

1

2

3

4

5

6

7

8

9

10

11 12

N

N+1 N+2

o

CS

DI

CS

NEW DPP DATA

1

A0 A1

1

A0 A1 D0 D1 D2 D3 D4 D5 D6 D7

DI

CURRENT DPP DATA

DO

D0 D1 D2 D3 D4 D5 D6 D7

DO

PROG

RDY/BSY

CURRENT

DPP VALUE

DPP

OUTPUT

DPP

OUTPUT

CURRENT

DPP VALUE

NEW

DPP VALUE

CURRENT

DPP VALUE

NON-VOLATILE

VOLATILE

NON-VOLATILE

Doc. No. MD-2005 Rev. G

8

Characteristics subject to change without notice

CAT523

APPLICATION CIRCUITS

+5V

DPP INPUT DPP OUTPUT

ANALOG OUTPUT

V

R

F

I

CODE

V_DPP

=

V_FS- V_ZERO+V_ZERO

255

V_FS= 0.99V_REF

= 0.01V

+15V

V_REF=5V

R_I=R_F

MSB LSB

–

V

DD

REFH

REFL

V

OUT

ZERO

REF

255

+

V_OUT= +4.90V

V_OUT=+0.02V

CONTROL

& DATA

×0.98V

REF

+0.01V

REF

= 0.990V

REF

1111 1111

1000 0000

0111 1111

0000 0001

0000 0000

CAT523

255

128

OP 07

×0.98V

REF

+0.01V

REF

=0.502V

REF

255

127

255

1

-15V

V

GND

×0.98V

REF

+0.01V

REF

=0.498V

REF

V_OUT= -0.02V

V_OUT= -4.86V

V_OUT= -4.90V

V

R

F

(

R ) - V

F I

R +

DPP

I

V

=

OUT

×0.98V

REF

+0.01V

REF

=0.014V

REF

R

I

255

0

For R = R

I

F

×0.98V

REF

+0.01V

REF

=0.010V

REF

255

V

= 2V - V

DPP I

OUT

Bipolar DPP Output

V+

I > 2mA

+5V

R

I

F

+15V

V

REF

= 5.00V

–

V

DD

REFH

REFL

DD

REFH

V

OUT

+

CONTROL

& DATA

CONTROL

& DATA

CAT523

LT 1029

CAT523

OP 07

-15V

V

GND

V

GND

REFL

R

F

R

I

V

= (1 +

) V

DPP

OUT

Digitally Trimmed Voltage Reference

Amplified DPP Output

28 ÷ 32V

15kΩ

10µF

10kΩ

1N5231B

5.1V

V

DD

V

REFH

CONTROL

& DATA

CAT523

+

–

MPT3055EL

V

GND

REFL

LM 324

OUTPUT

4.02kΩ

0 - 25V

@ 1A

10µF

35V

1.00kΩ

Digitally Controlled Voltage Reference

Characteristics subject to change without notice

9

Doc. No. MD-2005 Rev. G

CAT523

+5V

+V

REF

+5V

V

REF

V

REFH

DD

V

REFH

DD

127R

C

FINE ADJUST

DPP

127R

C

FINE ADJUST

DPP

+

(+V

) - (V

)

OFFSET

REF

R

=

C

0

1µA

CAT523

+

CAT523

(-V

) + (V )

OFFSET

REF

R

C

0

=

+V

COARSE ADJUST

DPP

1µA

R

C

COARSE ADJUST

DPP

+

–

V

OFFSET

GND

V

REFL

+V

V

GND

V

OFFSET

REFL

+

–

-V

REF

V

REF

256 x 1µA

R

=

C

-V

Fine adjust gives ±1 LSB change in V

OFFSET

when V

OFFSET

= V /2

REF

Coarse-Fine Offset Control by Averaging DPP

Outputs for Single Power Supply Systems

Coarse-Fine Offset Control by Averaging DPP

Outputs for Dual Power Supply Systems

+5V

2.2kΩ

4.7µF

V

REFH

LM385-2.5

DD

I

= 2 - 255mA

SINK

+15V

DPP1

+

1mA steps

2N7000

–

+5V

10kΩ

39Ω 1W

CONTROL

& DATA

CAT523

39Ω 1W

DPP2

+

–

5µA steps

2N7000

GND

V

REFL

5MΩ

3.9kΩ

10kΩ

–

+

TIP30

-15V

Current Sink with 4 Decades of Resolution

Doc. No. MD-2005 Rev. G

10

Characteristics subject to change without notice

CAT523

+15V

51kΩ

+

TIP29

–

10kΩ

+5V

V

DD

REFH

5MΩ

39Ω 1W

DPP1

–

+

CONTROL

& DATA

BS170P

CAT523

1mA steps

5MΩ

3.9kΩ

DPP2

–

+

GND

V

REFL

BS170P

5µA steps

LM385-2.5

-15V

I

= 2 ÷ 255mA

SOURCE

Current Source with 4 Decades of Resolution

Characteristics subject to change without notice

11

Doc. No. MD-2005 Rev. G

CAT523

PACKAGE OUTLINE DRAWINGS

PDIP 14-Lead (L)⁽¹⁾⁽²⁾

SYMBOL

MIN

3.56

0.38

2.92

0.36

1.15

0.21

18.67

7.62

6.10

NOM

MAX

A

A1

A2

b

5.33

3.30

0.45

4.95

0.55

1.77

0.35

19.68

8.25

7.11

E1

b1

c

1.52

0.26

D

19.05

7.87

E

E1

e

6.35

D

2.54 BSC

eB

L

7.88

2.99

10.92

3.81

TOP VIEW

3.30

E

A2

A1

A

L

c

e

b

b1

eB

SIDE VIEW

END VIEW

For current Tape and Reel information, download the PDF file from:

http://www.catsemi.com/documents/tapeandreel.pdf.

Notes:

(1) All dimensions are in millimeters. Angles in degrees.

(2) Complies with JEDEC standard MS-001.

Doc. No. MD-2005 Rev. G

12

Characteristics subject to change without notice

CAT523

SOIC 14-Lead (W)⁽¹⁾⁽²⁾

SYMBOL

MIN

NOM

MAX

1.75

0.25

0.51

0.25

8.75

6.20

4.00

A

A1

b

1.35

0.10

0.33

0.19

8.55

5.80

3.80

c

D

E

E1

e

8.65

6.00

E1

E

3.90

1.27 BSC

h

0.25

0.40

0º

0.50

1.27

8º

L

θ

PIN#1 IDENTIFICATION

TOP VIEW

h

D

θ

A

c

e

b

L

A1

SIDE VIEW

END VIEW

For current Tape and Reel information, download the PDF file from:

http://www.catsemi.com/documents/tapeandreel.pdf.

Notes:

(1) All dimensions are in millimeters. Angles in degrees.

(2) Complies with JEDEC standard MS-012.

Characteristics subject to change without notice

13

Doc. No. MD-2005 Rev. G

CAT523

EXAMPLE OF ORDERING INFORMATION

Prefix

Device # Suffix

CAT

523

W

I

T2

Optional

Company ID

Temperature Range

I = Industrial (-40ºC to 85ºC)

Tape & Reel

T: Tape & Reel

2: 2000/Reel

Product

Number

523

Package

L: PDIP

W: SOIC

Notes:

(1) All packages are RoHS compliant (Lead-free, Halogen-free).

(2) Standard lead finish is Matte-Tin.

(3) This device used in the above example is a CAT523WI-T2 (SOIC, Industrial Temperature, Tape & Reel).

ORDERING PART NUMBER

CAT523LI

CAT523WI

Doc. No. MD-2005 Rev. G

14

Characteristics subject to change without notice

REVISION HISTORY

Date

Rev. Reason

3/16/2004

D

Updated Potentiometer Characteristics

Updated Functional Diagram

7/12/2004

E

Updated Potentiometer Characteristics

Added Note 3 under Potentiometer/AC Characteristics tables

Add Package Outline Drawings

07/26/2007

10/08/2007

F

Updated Example of Ordering Information

Added MD- to document number

Change title

Update Writing to Memory

G

Copyrights, Trademarks and Patents

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

Adaptive Analog™, Beyond Memory™, DPP™, EZDim™, LDD™, MiniPot™, Quad-Mode™ and Quantum Charge Programmable™

Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products.

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

2975 Stender Way

Santa Clara, CA 95054

Phone: 408.542.1000

Fax: 408.542.1200

www.catsemi.com

Document No: MD-2005

Revision:

G

Issue date:

10/08/07


型号：	CAT523LI
厂家：	CATALYST SEMICONDUCTOR
描述：	Dual Digitally Programmable Potentiometer (DPP⑩) with 256 Taps and Microwire Interface 双数字可编程电位计（ DPP ？）与256丝锥和Microwire接口光电二极管
文件：	总15页 (文件大小：236K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CAT523LI [CATALYST]

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