CAT5261YI-50 ONSEMI [ON Semiconductor], CAT5261YI-50 Datasheet

CAT5261YI-50

Manufacturer Part Number

CAT5261YI-50

Description

Dual Digitally Programmable Potentiometers with 256 Taps and SPI Interface

Manufacturer

ONSEMI [ON Semiconductor]

Datasheet

1.CAT5261YI-50.pdf (15 pages)

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

CAT5261YI-50-T2

Manufacturer:

ON Semiconductor

Quantity:

135

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Dual Digitally Programmable Potentiometers

(DPP™) with 256 Taps and SPI Interface

FEATURES

PIN CONFIGURATION

Characteristics subject to change without notice

For Ordering Information details, see page 14.

Two linear-taper digitally programmable

potentiometers

256 resistor taps per potentiometer

End to end resistance 50kΩ or 100kΩ

Potentiometer control and memory access via

SPI interface

Low wiper resistance, typically 100

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

¯¯¯ 11

¯¯¯ 12

SOIC/TSSOP (W, Y)

5261

CAT

24 HOLD

23 SCK

22 NC

21 NC

20 NC

19 NC

18 GND

17 R

16 R

15 R

14 A1

13 SI

¯¯¯¯¯

DESCRIPTION

The

Potentiometers (DPPs™) integrated with control logic

and 8 bytes of NVRAM memory. Each DPP consists of

a series of 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 8-bit

control register (WCR) independently controls the wiper

tap switches for each DPP. Associated with each wiper

control register are four 8-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 register (DR0) for each

of the potentiometers is automatically loaded into its

respective wiper control register.

The CAT5261 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. It is available in the -40°C to 85°C

industrial operating temperature range and offered in

a 24-lead SOIC and TSSOP package.

FUNCTIONAL DIAGRAM

HOLD

SCK

CAT5261

INTERFACE

CONTROL

SPI BUS

LOGIC

two

NONVOLATILE

REGISTERS

CONTROL

WIPER

DATA

Digitally

CAT5261

Doc. No. MD-2122 Rev. F

Programmable

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CAT5261YI-50 Summary of contents

Page 1

Dual Digitally Programmable Potentiometers (DPP™) with 256 Taps and SPI Interface FEATURES Two linear-taper digitally programmable potentiometers 256 resistor taps per potentiometer End to end resistance 50kΩ or 100kΩ Potentiometer control and memory access via SPI interface Low wiper resistance, ...

Page 2

CAT5261 PIN DESCRIPTIONS SI: Serial Input SI is the serial data input pin. This pin is used to input all opcodes, byte addresses and data to be written to the CAT5261. Input data is latched on the rising edge of ...

Page 3

SERIAL BUS PROTOCOL The CAT5261 supports the SPI bus data transmission protocol. The synchronous Serial Peripheral Interface (SPI) helps the CAT5261 to interface directly with many of today's popular microcontrollers. DEVICE OPERATION The CAT5261 is two resistor arrays integrated with ...

Page 4

CAT5261 ABSOLUTE MAXIMUM RATINGS Parameters Temperature Under Bias Storage Temperature Voltage on Any Pin with Respect to Ground V with Respect to Ground CC Package Power Dissipation Capability (T Lead Soldering Temperature (10s) Wiper Current RECOMMENDED OPERATING CONDITIONS Parameters V ...

Page 5

D.C. OPERATING CHARACTERISTICS V = +2.5V to +6.0V, unless otherwise specified. CC Symbol Parameter I Power Supply Current CC1 Power Supply Current I CC2 Non-volatile WRITE I Standby Current ( Input Leakage Current LI I Output Leakage ...

Page 6

CAT5261 (1)(2) POWER UP TIMING Symbol Parameter t Power-up to Read Operation PUR t Power-up to Write Operation PUW WIPER TIMING Symbol Parameter t Wiper Response Time After Power Supply Stable WRPO t Wiper Response Time After Instruction Issued WRL ...

Page 7

Timing Figure 2. HOLD CS SCK HOLD SO INSTRUCTION AND REGISTER DESCRIPTION DEVICE TYPE / ADDRESS BYTE The first byte sent to the CAT5261 from the master/ processor is called the Device Address Byte. The most significant four bits ...

Page 8

CAT5261 WIPER CONTROL AND DATA REGISTERS Wiper Control Register (WCR) The CAT5261 contains two 8-bit Wiper Control Registers, one for each potentiometer. The Wiper Control Register output is decoded to select one of 256 switches along its resistor array. The ...

Page 9

The basic sequence of the three byte instructions is illustrated in Figure 8. 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

CAT5261 Figure 10. Increment/Decrement INC/DEC Command Issued SCK INSTRUCTION FORMAT Read Wiper Control Register (WCR) DEVICE ADDRESSES ¯¯¯ Write Wiper Control Register (WCR) DEVICE ADDRESSES ¯¯¯ ...

Page 11

Global Transfer Data Register (DR) to Wiper Control Register (WCR) DEVICE ADDRESSES ¯¯¯ Global Transfer Wiper Control Register (WCR) to Data Register (DR) DEVICE ADDRESSES ¯¯¯ ...

Page 12

CAT5261 PACKAGE OUTLINE DRAWINGS 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 in millimeters. Angles in degrees. (2) ...

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 in millimeters. Angles in degrees. (2) Complies with JEDEC specification MO-153. © ...

Page 14

... Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The device used in the above example is a CAT526159WI-00-T1 (SOIC, Industrial Temperature, 100 (3) The lead finish is Matte-Tin. Ordering Part Number CAT5261WI-50 CAT5261WI-00 CAT5261YI-50 CAT5261YI-00 Doc. No. MD-2122 Rev -00 Temperature Range Resistance I = Industrial (-40ºC to 85ºC) 50: 50kΩ ...

Page 15

REVISION HISTORY Date Rev. Description 18-Nov-03 A Initial Issue 04-Apr-04 B Updated wiper resistance from 50Ω to 100Ω Updated Functional Diagram ¯¯¯ Pin Description Updated WP Updated notes in Absolute Max Ratings Eliminated Commercial temp range in all areas Updated ...

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