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PDF DS2411 Data sheet ( Hoja de datos )
| Número de pieza | DS2411 | |
| Descripción | Silicon Serial Number with VCC Input | |
| Fabricantes | Dallas Semiconducotr | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DS2411 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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www.maxim-ic.com
FEATURES
§ Unique, Factory-Lasered and Tested 64-Bit
Registration Number (8-Bit Family Code
Plus 48-Bit Serial Number Plus 8-Bit CRC
Tester); Guaranteed No Two Parts Alike
§ Standby Current <1µA
§ Built-In Multidrop Controller Enables
Multiple DS2411s to Reside on a Common
1-Wireâ Network
§ Multidrop Compatible with Other 1-Wire
Products
§ 8-Bit Family Code Identifies Device as
DS2411 to the 1-Wire Master
§ Low-Cost TSOC, SOT23-3, and Flip-Chip
Surface-Mount Packages
§ Directly Connects to a Single-Port Pin of a
Microprocessor and Communicates at up to
15.4kbps
§ Overdrive Mode Boosts Communication
Speed to 125kbps
§ Operating Range: 1.5V to 5.25V, -40°C to
+85°C
DS2411
Silicon Serial Number with VCC Input
PIN CONFIGURATION
3
12
SOT23-3, Top View
16
25
34
TSOC, Top View
1
2
AB
Flip Chip, Top view, bumps
not visible
ORDERING INFORMATION
PART
DS2411R/
T&R
DS2411P
DS2411P/
T&R
DS2411X
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PACKAGE
SOT23-3,
Tape-and-Reel
TSOC
TSOC,
Tape-and-Reel
Flip Chip,
Tape-and-Reel
PIN DESCRIPTION
PIN
NAME SOT23 TSOC
I/O
VCC
GND
N.C.
N.C.
N.C.
1
2
3
—
—
—
2
6
1
3
4
5
FLIP
CHIP
A1
B2
B1
A2
—
—
DESCRIPTION
The DS2411 silicon serial number is a low-cost, electronic registration number with external power
supply. It provides an absolutely unique identity that can be determined with a minimal electronic
interface (typically, a single port pin of a microcontroller). The DS2411’s registration number is a
factory-lasered, 64-bit ROM that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit
family code (01h). Data is transferred serially through the Dallas Semiconductor’s 1-Wire protocol. The
external power supply is required, extending the operating voltage range of the device below typical
1-Wire devices.
1-Wire is a registered trademark of Dallas Semiconductor.
1 of 11
052003
1 page  
Figure 2. 1-WIRE CRC GENERATOR
POLYNOMIAL = X8 + X5 + X4 + 1
DS2411
1st 2nd 3rd 4th
STAGE STAGE STAGE STAGE
X0 X1 X2 X3
5th
STAGE
X4
6th 7th 8th
STAGE STAGE STAGE
X5 X6
X7
INPUT DATA
X8
Figure 3. DS2411 EQUIVALENT CIRCUIT
VCC
Rx
Tx
100 Ω
MOSFET
GROUND
I/O
-1mA £ IL £ 1mA
Figure 4. BUS MASTER CIRCUIT
a) Open Drain
BUS MASTER
DS5000 OR 8051
EQUIVALENT
OPEN-DRAIN
Rx PORT PIN
Tx
VCC to DS2411
RPUP
I/O to DS2411
Ground to DS2411
RPUP must be between 0.3 kW and 2.2 kW. The optimal
value depends on the 1-Wire communication speed and
the bus load characteristics.
b) DS2480B Serial Bridge
5V OPERATION ONLY
5V
VDD
Vcc
VPP POL
UART
OR µC
SIN (RxD)
SOUT (TxD)
1
LM
RxD 1-W
DS2480
TxD
GND
I/O
*
GND
START
0 STOP
* ONLY ONE DS9502 ESD PROTECTION DIODE WITH 5V
5 of 11
5 Page 
NOISE SUPPRESSION SCHEME Figure 8
VPUP
tREH
VTH
VHY
0V
Case A
Case B
tGL
tREH
Case C
tGL
DS2411
CRC GENERATION
To validate the registration number transmitted from the DS2411, the bus master can generate a CRC
value from the 8-bit family code and unique 48-bit serial number as it is received. If the CRC matches the
last 8 bits of the registration number, the transmission is error free.
The equivalent polynomial function of this CRC is: CRC = x8 + x5 + x4 + 1.
CUSTOM DS2411
Customization of a portion of the unique 48-bit serial number by the customer is available. Dallas
Semiconductor will register and assign a specific customer ID in the 12 most significant bits of the 48-bit
field. The next most significant bits are selectable by the customer as a starting value, and the least
significant bits are non-selectable and will be automatically incremented by one. Certain quantities and
conditions apply for these custom parts. Contact your Maxim/Dallas Semiconductor sales representative
for more information.
11 of 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet DS2411.PDF ] | |
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