CAT5401WI-10 ONSEMI [ON Semiconductor], CAT5401WI-10 Datasheet

CAT5401WI-10

Manufacturer Part Number

CAT5401WI-10

Description

Quad Digitally Programmable Potentiometers with 64 Taps and SPI Interface

Manufacturer

ONSEMI [ON Semiconductor]

Datasheet

1.CAT5401WI-10.pdf (15 pages)

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R W0

R W1

GND

(DPP™) with 64 Taps and SPI Interface

FEATURES

PIN CONFIGURATION

V CC

Characteristics subject to change without notice

R H0

R H1

R L0

R L1

Quad Digitally Programmable Potentiometers

For Ordering Information details, see page 14.

A 1

Four linear taper digitally programmable

potentiometers

64 resistor taps per potentiometer

End to end resistance 2.5kΩ, 10kΩ, 50kΩ or

100kΩ

Potentiometer control and memory access via

SPI interface: Mode (0, 0) and (1, 1)

Low wiper resistance, typically 100Ω

Nonvolatile memory storage for up to four

wiper settings for each potentiometer

Automatic recall of saved wiper settings at

power up

2.5 to 6.0 volt operation

Standby current less than 1µA

1,000,000 nonvolatile WRITE cycles

100 year nonvolatile memory data retention

24-lead SOIC and 24-lead TSSOP

Industrial temperature range

SOIC Package (W)

5401

CAT

R L3

R H3

R W3

A 0

HOLD

SCK

R L2

R H2

R W2

HOLD

R W1

GND

R W2

R H1

R H2

SCK

R L1

R L2

A 1

TSSOP Package (Y)

5401

CAT

R W0

R H0

R L0

V CC

R L3

R H3

R W3

A 0

DESCRIPTION

The

Potentiometers (DPPs™) integrated with control logic

and 16 bytes of NVRAM memory. Each DPP consists

of a series of 63 resistive elements connected

between two externally accessible end points. The tap

points between each resistive element are connected

to the wiper outputs with CMOS switches. A separate

6-bit control register (WCR) independently controls

the wiper tap switches for each DPP. Associated with

each wiper control register are four 6-bit non-volatile

memory data registers (DR) used for storing up to four

wiper settings. Writing to the wiper control register or

any of the non-volatile data registers is via a SPI serial

bus. On power-up, the contents of the first data

automatically loaded into its respective wiper control

The CAT5401 can be used as a potentiometer or as a

two terminal, variable resistor. It is intended for circuit

level or system level adjustments in a wide variety of

applications.

FUNCTIONAL DIAGRAM

SCK

CAT5401

CONTROL LOGIC

INTERFACE

SPI BUS

WIPER CONTROL

NONVOLATILE

four

REGISTERS

DATA

Digitally

CAT5401

Doc. No. MD-2012 Rev. I

Programmable

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CAT5401WI-10 Summary of contents

Page 1

Quad Digitally Programmable Potentiometers (DPP™) with 64 Taps and SPI Interface FEATURES Four linear taper digitally programmable potentiometers 64 resistor taps per potentiometer End to end resistance 2.5kΩ, 10kΩ, 50kΩ or 100kΩ Potentiometer control and memory access via SPI interface: ...

Page 2

CAT5401 PIN DESCRIPTIONS Pin# Pin# (SOIC) (TSSOP) Name Function Supply Voltage CC Low Reference Terminal for Potentiometer 0 High Reference Terminal for Potentiometer 0 Wiper Terminal for 4 22 ...

Page 3

SERIAL BUS PROTOCOL The CAT5041 supports the SPI bus data transmission protocol. The synchronous Serial Peripheral Interface (SPI) helps the CAT5401 to interface directly with many of today's popular microcontrollers. CAT5041 contains an 8-bit instruction register. The instruction set and ...

Page 4

CAT5401 (1) Absolute Maximum Ratings Parameters Temperature Under Bias Storage Temperature Voltage on Any Pin with Respect with Respect to Ground CC Package Power Dissipation Capability (T Lead Soldering Temperature (10s) Wiper Current Recommended Operating Conditions Parameters ...

Page 5

D.C. OPERATING CHARACTERISTICS Over recommended operating conditions unless otherwise stated. Symbol Parameter I Power Supply Current CC I Standby Current ( Input Leakage Current LI I Output Leakage Current LO V Input Low Voltage IL V Input ...

Page 6

CAT5401 (1)(2) Power Up Timing Symbol Parameter t Power-up to Read Operation PUR t Power-up to Write Operation PUW Write Cycle Limits Symbol Parameter t Write Cycle Time WR Reliability Characteristics Symbol Parameter (3) N Endurance END (3) T Data ...

Page 7

INSTRUCTION AND REGISTER DESCRIPTION DEVICE TYPE / ADDRESS BYTE The first byte sent to the CAT5401 from the master/ processor is called the Device Address Byte. The most significant four bits of the Device Type address are a device type ...

Page 8

CAT5401 Wiper Control and Data Registers Wiper Control Register (WCR) The CAT5401 contains four 6-bit Wiper Control Registers, one for each potentiometer. The Wiper Control Register output is decoded to select one of 64 switches along its resistor array. The ...

Page 9

The basic sequence of the three byte instructions is illustrated in Figure 4. These three-byte instructions exchange data between the WCR and one of the Data Registers. The WCR controls the position of the wiper. The response of the wiper ...

Page 10

CAT5401 Figure 6. Increment/Decrement Timing Limits INC/DEC Command Issued SCK INSTRUCTION FORMAT Read Wiper Control Register (WCR) DEVICE ADDRESSES ¯¯¯ CS Write Wiper Control Register (WCR) DEVICE ADDRESSES 0 1 ...

Page 11

INSTRUCTION FORMAT (continued) Global Transfer Data Register (DR) to Wiper Control Register (WCR) DEVICE ADDRESSES ¯¯¯ CS Global Transfer Wiper Control Register (WCR) to Data Register (DR) DEVICE ADDRESSES ...

Page 12

CAT5401 PACKAGE OUTLINE DRAWINGS (1)(2) SOIC 24-Lead 300mils ( PIN#1 IDENTIFICATION TOP VIEW D A SIDE 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 ...

Page 13

TSSOP 24-Lead 4.4mm (Y) e TOP VIEW SIDE 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 ...

Page 14

... Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The device used in the above example is a CAT5401WI-00-T1 (SOIC, Industrial Temperature, 100kΩ, Tape & Reel). (3) The lead finish is Matte-Tin. Ordering Part Number CAT5401WI-25 CAT5401WI-10 CAT5401WI-50 CAT5401WI-00 CAT5401YI-25 CAT5401YI-10 CAT5401YI-50 CAT5401YI-00 Doc. No. MD-2012 Rev. I ...

Page 15

REVISION HISTORY Date Revision Description 31-Mar-04 F Changed Preliminary designation to Final Eliminated Commercial temp range in all areas Updated Potentiometer characteristics notes Updated Pin Descriptions (A0, A1 and WP Updated notes for Absolute Max Ratings 80 and Potentiometer Characteristics ...

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