DS3902U-515 MAXIM [Maxim Integrated Products], DS3902U-515 Datasheet

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DS3902U-515

Manufacturer Part Number
DS3902U-515
Description
Dual, NV, Variable Resistors with User EEPROM
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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Part Number
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Part Number:
DS3902U-515+
Manufacturer:
MAXIM/美信
Quantity:
20 000
The DS3902 features a dual, nonvolatile (NV), low tem-
perature-coefficient, variable digital resistor with 256
user-selectable positions. The DS3902 can operate
over a wide supply range of 2.4V to 5.5V, and commu-
nication with the device is achieved through an I
compatible serial interface. Internal address settings
allow the DS3902 slave address to be programmed to
one of 128 possible addresses. The low cost and the
small size of the DS3902 make it an ideal replacement
for conventional mechanical-trimming resistors.
Rev 0; 5/04
Pin Configuration appears at end of data sheet.
I
Companies, conveys a license under the Philips I
tem conforms to the I
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.
2
C is a trademark of Philips Corp. Purchase of I
Optical Transceivers
Optical Transponders
Instrumentation and Industrial Controls
RF Power Amps
Audio Power-Amp Biasing
Replacement for Mechanical Variable Resistors
and DIP Switches
NOTES:
1. WITH ADD_SEL TIED TO GND, THE SLAVE ADDRESS WILL BE A2H.
2. FOR A DETAILED APPLICATION DIAGRAM OF A SPECIFIC LD,
MASTER
2-WIRE
0.1µF
CONSULT THE LASER DRIVER DATA SHEET.
4.7kΩ
2
C Standard Specification as defined by Philips.
V
General Description
CC
4.7kΩ
V
SCL
SDA
ADD_SEL
GND
CC
Applications
______________________________________________ Maxim Integrated Products
1
DS3902
2
C Patent Rights to use these components in an I
2
C components of Maxim Integrated Products, Inc., or one of its Associated
Dual, NV, Variable Resistors
2
H0
H1
C™-
BIAS SET
MOD SET
♦ Dual 256-Position Linear Digital Resistors
♦ Available as 50kΩ/30kΩ or 50kΩ/15kΩ
♦ Resistor Settings Stored in NV Memory
♦ Low Temperature Coefficient
♦ I
♦ Wide Operating Voltage (2.4V to 5.5V)
♦ Software Write Protection
♦ User-EEPROM Memory
♦ Programmable Slave Address
♦ Operating Temperature Range: -40°C to +95°C
♦ Small 8-Pin µSOP Package
*Add /T&R for Tape & Reel orders.
DS3902U-530
DS3902U-515
2
IN+
IN-
TX_DISABLE
TX_FAULT
BIASMAX
APCSET
MODSET
PC_MON
BS_MON
C-Compatible Serial Interface
PART
2
2
2
with User EEPROM
DRIVER IC
LASER
Typical Operating Circuit
30kΩ, 50kΩ
15kΩ, 50kΩ
RESISTOR
VALUES
(R0, R1)
Ordering Information
BIAS+
BIAS-
OUT+
OUT-
MD
2
C system, provided that the sys-
BRAND
3902A
3902B
TOP
V
CC
V
CC
Features
PIN-
PACKAGE
8 µSOP
8 µSOP
1

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DS3902U-515 Summary of contents

Page 1

... Wide Operating Voltage (2.4V to 5.5V) ♦ Software Write Protection ♦ User-EEPROM Memory ♦ Programmable Slave Address ♦ Operating Temperature Range: -40°C to +95°C ♦ Small 8-Pin µSOP Package Applications PART DS3902U-530 DS3902U-515 *Add /T&R for Tape & Reel orders. IN IN- TX_DISABLE TX_FAULT DS3902 ...

Page 2

Dual, NV, Variable Resistors with User EEPROM ABSOLUTE MAXIMUM RATINGS Voltage Range SDA, SCL, H0, CC and H1 Relative to Ground................................-0.5V to +6.0V Voltage Range on ADD_SEL Relative to Ground ...............-0. 0.5V), not to ...

Page 3

AC ELECTRICAL CHARACTERISTICS (Figure +2.4V to +5.5V -40°C to +95°C, unless otherwise noted. Timing referenced PARAMETER SYMBOL SCL Clock Frequency Bus Free Time Between STOP and START Conditions Hold Time (Repeated) ...

Page 4

Dual, NV, Variable Resistors with User EEPROM (V = +3.3V +25°C, unless otherwise noted STANDBY SUPPLY CURRENT vs. TEMPERATURE 180 V = +5V CC 160 140 120 100 ASEL ...

Page 5

T = +25°C, unless otherwise noted ABSOLUTE LINEARITY vs. POSITION 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0. 100 POSITION (DEC) H1 ABSOLUTE LINEARITY vs. POSITION 0.1 0.08 0.06 ...

Page 6

Dual, NV, Variable Resistors with User EEPROM Pin Description PIN NAME FUNCTION 1 H0 Resistor 0 High Terminal Serial-Data Open-Drain 2 SDA Input/Output 2 3 SCL I C Serial-Clock Input 4 GND Ground 5 ADD_SEL Address Select ...

Page 7

Table 1. Memory Map DESCRIPTION ADDR MSB Slave Address 00h Configuration 01h X Resistor 0 02h b7 Resistor 1 03h b7 04h Password Entry 05h 06h Password Setting 07h No 08h– Memory 0Fh User 10h– 16 BYTES OF GENERAL PURPOSE ...

Page 8

Dual, NV, Variable Resistors with User EEPROM SDA t BUF t LOW SCL t HD:STA STOP START NOTE: TIMING IS REFERENCED TO V (MAX) AND V (MIN Figure Timing Diagram START Condition: A START ...

Page 9

Slave Address Byte: Each slave on the I responds to a slave addressing byte sent immediately following a START condition. The slave address byte contains the slave address in the most significant 7-bits and the R/W bit in the least ...

Page 10

Dual, NV, Variable Resistors with User EEPROM TYPICAL 2-WIRE WRITE TRANSACTION MSB LSB START R/W READ/ SLAVE WRITE ADDRESS* EXAMPLE 2-WIRE TRANSACTIONS (WHEN ADD_SEL TIED TO GND) A2h A) SINGLE BYTE WRITE START ...

Page 11

Pin Configuration TOP VIEW H0 1 SDA 2 DS3902 SCL 3 GND 4 µSOP 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 ...

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