DS3902 Maxim Integrated Products, DS3902 Datasheet - Page 6
DS3902
Manufacturer Part Number
DS3902
Description
Dual, NV, Variable Resistors With User EePROM
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3902.pdf
(11 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS3902A
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
DS3902AU+
Manufacturer:
MAXIM
Quantity:
390
Company:
Part Number:
DS3902BU+
Manufacturer:
MAXIM
Quantity:
45
Part Number:
DS3902U-515+
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
DS3902U-530+
Manufacturer:
Maxim Integrated Products
Quantity:
135
Company:
Part Number:
DS3902U-530+
Manufacturer:
ALTERA
Quantity:
14
Part Number:
DS3902U-530+
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
DS3902U-530+T&R
Manufacturer:
MAXIM
Quantity:
11
Dual, NV, Variable Resistors
with User EEPROM
6
PIN
_____________________________________________________________________
1
2
3
4
5
6
7
8
ADD_SEL
ADD_SEL Address Select
GND
SDA
SCL
V
NAME
GND
CC
SDA
N.C.
SCL
V
H0
H1
CC
V
Resistor 0 High Terminal
I
Input/Output
I
Ground
Resistor 1 High Terminal
No Connection
Power-Supply Voltage
CC
2
2
C Serial-Data Open-Drain
C Serial-Clock Input
INTERFACE
I
2
C
Pin Description
8
FUNCTION
7
00h
01h
02h
03h
04-05h PASSWORD ENTRY (RAM)
06-07h PASSWORD SETTING
10-1Fh USER MEMORY (16 BYTES)
MSB
X X X X X X
MSBYTE
DEVICE MEMORY
SLAVE ADDRESS
RESISTOR 0
RESISTOR 1
(EEPROM)
DS3902
LSBYTE
The block diagram of the DS3902 is shown in the Block
Diagram section. Detailed descriptions of major com-
ponents follow.
A memory map of the DS3902 is shown in
The DS3902 contains two, 256-position (plus High-Z),
NV, variable digital resistors. Pins H0 and H1 are the
high terminals of Resistor 0 and Resistor 1, respective-
ly. The low terminals of both resistors are tied to ground
internally. The resistors are programmed using the I
serial interface (see the Resistor 0 and Resistor 1 regis-
R1 R0
HI-Z
LSB
8
8
Detailed Description
RESISTOR 0
256 POSITION
30k OR 15kΩ
RESISTOR 1
256 POSITION
50kΩ
HIGH-Z
HI-Z
Block Diagram
Memory Map
H0
H1
Table
Resistors
1.
2
C