DS3930 Maxim Integrated Products, DS3930 Datasheet

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DS3930

Manufacturer Part Number
DS3930
Description
DS3930 Hex Nonvolatile Potentiometer With I/o And Memory
Manufacturer
Maxim Integrated Products
Datasheet

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The DS3930 contains six 256-position nonvolatile (NV)
potentiometers, 64 bytes of NV user EEPROM memory,
and four programmable NV I/O pins. The six poten-
tiometers all share a common low side. The potentiome-
ters are separated into two groups of three 50kΩ
potentiometers in parallel. Each group of three poten-
tiometers shares a common high side and forms an
equivalent resistance of 16.6kΩ (three 50kΩ poten-
tiometers in parallel).
Rev 0; 4/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
RF Transceivers
Voltage References
Power Supply Calibration
Mobile Phones and PDAs
Fiber Optic Transceiver Modules
Portable Electronics
Radio Tuners
Small, Low-Cost Replacement for Mechanical
Potentiometers
TOP VIEW
GND
SDA
SCL
I/O
I/O
I/O
V
A0
A1
A2
CC
0
1
2
10
1
2
3
4
5
6
7
8
9
General Description
TSSOP
DS3930
Pin Configuration
Hex Nonvolatile Potentiometer with
20
19
18
17
16
15
14
13
12
11
Applications
HI
W
W
LO
HI
W
W
W
I/O
W
0
1
2
3
4
5
0-2
3-5
0-5
3
_____________________________________________ Maxim Integrated Products
♦ Six 256-Position NV Potentiometers
♦ Four General-Purpose NV I/O Pins
♦ 64 Bytes of User EEPROM Memory
♦ 0 to 5.5V on Any Potentiometer Terminal,
♦ All Six Potentiometers Share a Common Low Side
♦ Potentiometers Separated into Two Groups of
♦ 2-Wire Serial Interface
♦ Wide Supply Range (2.7V to 5.5V)
♦ Up to Eight DS3930s Can Share the Same
DS3930E
INTERFACE
Independent of V
Three Potentiometers, Each Sharing a Common
High Side
2-Wire Bus
2-WIRE
DECOUPLING CAP
PART
4.7kΩ
0.1µF
V
CC
NONVOLATILE I/O
V
CC
4.7kΩ
Typical Operating Circuit
DIGITAL
I/O and Memory
PIN-PACKAGE
20 TSSOP
CC
Ordering Information
A0
A1
A2
SDA
SCL
V
GND
I/O
I/O
I/O
CC
0
1
2
DS3930
HI
LO
HI
I/O
W
W
W
W
W
W
0-2
3-5
0-5
0
1
2
3
4
5
3
Features
DIGITAL
NONVOLATILE I/O
WIPER
TERMINALS
WIPER
TERMINALS
V
CC
1

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DS3930 Summary of contents

Page 1

... All Six Potentiometers Share a Common Low Side ♦ Potentiometers Separated into Two Groups of Three Potentiometers, Each Sharing a Common High Side Applications ♦ 2-Wire Serial Interface ♦ Wide Supply Range (2.7V to 5.5V) ♦ Eight DS3930s Can Share the Same 2-Wire Bus PART DS3930E 20 HI 0-2 ...

Page 2

Hex Nonvolatile Potentiometer with I/O and Memory ABSOLUTE MAXIMUM RATINGS Voltage on V Relative to Ground...................... -0.5V to +6.0V CC Voltage on I/O , I/O , I/O , I/O , SDA, SCL, A0, A1, and ...

Page 3

Hex Nonvolatile Potentiometer with ANALOG RESISTOR CHARACTERISTICS (V = +2.7V to +5.5V -40°C to +85°C, unless otherwise specified PARAMETER SYMBOL End-to-End Resistance Wiper Resistance Factory Default Wiper Setting Factory Default I/O Setting POT-to-POT Matching Differential Linearity ...

Page 4

Hex Nonvolatile Potentiometer with I/O and Memory AC ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V -40°C to +85°C, unless otherwise specified PARAMETER SYMBOL Data Hold Time (Notes HD:DAT Data Setup Time ...

Page 5

Hex Nonvolatile Potentiometer with (V = 5.0V +25°C, unless otherwise specified SUPPLY CURRENT vs. TEMPERATURE 220 SDA = SCL = 200 180 160 140 120 -40 -20 ...

Page 6

Hex Nonvolatile Potentiometer with I/O and Memory PIN NAME 1 A0 Address Input. The address input pins determine the 2-wire address of the device Address Input 3 A2 Address Input 4 SDA 2-Wire Serial Data I/O. This pin ...

Page 7

... F8h FFh SDA SCL GND Figure 1. DS3930 Functional Diagram Detailed Description The DS3930 contains six NV potentiometers with 64 bytes of NV user memory (EEPROM), and four pro- grammable NV I/O pins. Figure functional dia- gram of the DS3930. EEPROM 64 BYTES OF EEPROM 8 RESERVED 8 POT0 CONTROL ...

Page 8

Hex Nonvolatile Potentiometer with I/O and Memory The I/O pins can be used as general-purpose digital I/O signals. The I/O pins have CMOS outputs with an Table 1. I/O Pin Truth Table PULLUP CTRL I/O PIN SETTING (I/O CONTROL (I/O ...

Page 9

... The DS3930 operates as a slave on the 2-wire bus. Connections to the bus are made through the open-drain I/O lines, SDA and SCL. The following I/O terminals control the 2-wire serial port: SDA, SCL, and A0 ...

Page 10

... Slave Address: This is the first byte received fol- lowing the start condition from the master device. The slave address consists of a 4-bit control code. For the DS3930, this is set as 1010 binary for read/write operations. The next bits of the slave address are the device address (A2–A0). The last bit of the slave address (R/W) defines the operation to be performed. When set to a ‘ ...

Page 11

... ADDRESS DETERMINED BY A0, A1, AND A2 MUST MATCH THE ADDRESS SET BY THE ADDRESS PINS. Figure 6. Example 2-Wire Transactions Applications Information Power Supply Decoupling To achieve the best results when using the DS3930, decouple the power supply with a 0.1µF high-quality, ceramic, surface-mount capacitor. Surface-mount com ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products TRANSISTOR COUNT: 27,000 SUBSTRATE CONNECTED TO GROUND ...

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