CAT5419WI-25 ONSEMI [ON Semiconductor], CAT5419WI-25 Datasheet

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CAT5419WI-25

Manufacturer Part Number
CAT5419WI-25
Description
Dual Digitally Programmable Potentiometers with 64 Taps and 2-wire Interface
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet
1.CAT5419WI-25.pdf (16 pages)
Dual Digitally Programmable Potentiometers (DPP™)
with 64 Taps and 2-wire Interface
FEATURES
PIN CONFIGURATION
2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
Two linear-taper digital potentiometers
64 resistor taps per potentiometer
End to end resistance 2.5kΩ, 10kΩ, 50kΩ or
100kΩ
Potentiometer control and memory access via
2-wire Interface (I
Low wiper resistance, typically 80
Four non-volatile wiper settings for each
potentiometer
Recall of 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
Write protection for data register
GND 12
SDA
R
¯¯¯
R
V
WP
R
R
R
R
A2
W0
A
W1
CC
H0
H1
L0
L1
1
(top view)
SOIC (W)
10
11
1
2
3
4
5
6
7
8
9
5419
CAT
24 NC
23 NC
22 NC
21 NC
20 A
19 NC
18 A
17 SCL
16 NC
15 NC
14 NC
13 NC
2
0
3
C like)
GND
SDA
SCL 11
R
R
R
NC
NC
NC
NC 10
A
W1
A
H1
L1
1
3
TSSOP (Y)
(top view)
12
1
2
3
4
5
6
7
8
9
5419
CAT
24 WP
23 A
22 R
21 R
20 R
19 V
18 NC
17 NC
16 NC
15 NC
14 A
13 NC
¯¯¯
2
W0
CC
0
H0
L0
1
SDA
SCL
DESCRIPTION
The
Potentiometers (DPP™) integrated with control logic
and 16 bytes of NVRAM memory.
A separate 6-bit control register (WCR) independently
controls the wiper tap position 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 regis-
ters is via a 2-wire serial bus (I
the contents of the first data register (DR0) for each of
the two potentiometers is automatically loaded into its
respective wiper control registers (WCR).
The Write Protection (WP
inadvertent programming of the data register.
The CAT5419 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
WP
For Ordering Information details, see page 15.
A0
A1
A2
A3
CAT5419
2-WIRE BUS
INTERFACE
CONTROL
LOGIC
is
two
NONVOLATILE
REGISTERS
REGISTERS
¯¯¯ ) pin protects against
CONTROL
WIPER
DATA
Digitally
2
C-like). On power-up,
CAT5419
Doc. No. MD-2115 Rev. I
R
R
Programmable
H0
L0
R
R
H1
L1
R
R
W0
W1

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CAT5419WI-25 Summary of contents

Page 1

Dual Digitally Programmable Potentiometers (DPP™) with 64 Taps and 2-wire Interface FEATURES Two linear-taper digital potentiometers 64 resistor taps per potentiometer End to end resistance 2.5kΩ, 10kΩ, 50kΩ or 100kΩ Potentiometer control and memory access via 2 2-wire Interface (I ...

Page 2

CAT5419 PIN DESCRIPTIONS SCL: Serial Clock The CAT5419 serial clock input pin is used to clock all data transfers into or out of the device. SDA: Serial Data The CAT5419 bidirectional serial data pin is used to transfer data into ...

Page 3

ABSOLUTE MAXIMUM RATINGS Parameters Temperature Under Bias Storage Temperature Range Voltage to any Pins with Respect with Respect to GND CC Package Power Dissipation Capability (T Lead Soldering Temperature (10 secs) Wiper Current RECOMMENDED OPERATING CONDITIONS Parameters ...

Page 4

CAT5419 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 ...

Page 5

WRITE CYCLES LIMITS Symbol Parameter t Write Cycle Time WR The write cycle is the time from a valid stop condition of a write sequence to the end of the internal program/erase cycle. During the write cycle, the bus interface ...

Page 6

CAT5419 SERIAL BUS PROTOCOL The following defines the features of the 2-wire bus protocol: (1) Data transfer may be initiated only when the bus is not busy. (2) During a data transfer, the data line must remain stable whenever the ...

Page 7

WRITE OPERATIONS In the Write mode, the Master device sends the START condition and the slave address information to the Slave device. After the Slave generates an acknowledge, the Master sends the instruction byte that defines the requested operation of ...

Page 8

CAT5419 INSTRUCTIONS AND REGISTER DESCRIPTION INSTRUCTIONS Slave Address Byte The first byte sent to the CAT5419 from the master/ processor is called the Slave/DPP Address Byte. The most significant four bits of the slave address are a device type identifier. ...

Page 9

WIPER CONTROL AND DATA REGISTERS Wiper Control Register (WCR) The CAT5419 contains two 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 contents ...

Page 10

CAT5419 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 ...

Page 11

Figure 10. Increment/Decrement Timing Limits INC/DEC Command Issued SCL SDA R W INSTRUCTION FORMAT Read Wiper Control Register (WCR) S DEVICE ADDRESSES Write Wiper Control Register (WCR) S DEVICE ...

Page 12

CAT5419 INSTRUCTION FORMAT (continued) Global Transfer Data Register (DR) to Wiper Control Register (WCR) S DEVICE ADDRESSES Global Transfer Wiper Control Register (WCR) to Data Register (DR) S DEVICE ...

Page 13

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 in millimeters. Angles in degrees. (2) ...

Page 14

CAT5419 (1)(2) 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 MO-153. ...

Page 15

... Suffix CAT 5419 W Package W: SOIC Y: TSSOP Company ID Product Number 5419 ORDERING PART NUMBER CAT5419WI-25 CAT5419WI-10 CAT5419WI-50 CAT5419WI-00 CAT5419YI-25 CAT5419YI-10 CAT5419YI-50 CAT5419YI-00 Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is Matte-Tin. (3) This device used in the above example is a CAT5419WI-00-T1 (SOIC, Industrial Temperature, 100kΩ, Tape & Reel). ...

Page 16

CAT5419 REVISION HISTORY Date Rev. Description 08-Oct-03 E Update Features Update Description 01-Apr-04 F Eliminate data sheet designation Update Features Update Description Update Pin Description Update Absolute Maximum Ratings Update Recommended Operating Conditions Update Potentiometer Characteristics Update Write Protection Update ...

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