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PDF DS2401 Data sheet ( Hoja de datos )
| Número de pieza | DS2401 | |
| Descripción | Silicon Serial Number | |
| Fabricantes | Dallas Semiconducotr | |
| Logotipo |  |
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1. DS2401 datasheet  Hay una vista previa y un enlace de descarga de DS2401 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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FEATURES
§ Upgrade and drop-in replacement for
DS2400
- Extended 2.8 to 6.0 voltage range
- Multiple DS2401s can reside on a
common 1-Wire bus
§ Unique, factory-lasered and tested 64-bit
registration number (8-bit family code + 48-
bit serial number + 8-bit CRC tester);
guaranteed no two parts alike
§ Built-in multidrop controller ensures
compatibility with other MicroLAN
products
§ 8-bit family code specifies DS2401
communications requirements to reader
§ Presence Pulse acknowledges when the
reader first applies voltage
§ Low-cost TO-92, SOT-223 and TSOC
surface mount packages
§ Reduces control, address, data, and power to
a single pin
§ Zero standby power required
§ Directly connects to a single port pin of a
microprocessor and communicates at up to
16.3 kbits/s
§ TO-92 tape & reel version with leads bent to
100 mil spacing (default) or with straight
leads (DS2401T-SL)
§ Applications
- PCB Identification
- Network Node ID
- Equipment Registration
§ Operates over industrial temperature range of
-40°C to +85°C
DS2401
Silicon Serial Number
PIN ASSIGNMENT
TO-92
TSOC PACKAGE
DALLAS
DS2401
TOP VIEW
3.7 X 4.0 X 1.5 mm
123
123
BOTTOM VIEW
TOP VIEW
See Mech. Drawings
Section
PIN DESCRIPTION
TO-92/SOT-223
Pin 1
Ground
Pin 2
Data (DQ)
Pin 3
No Connect
Pin 4
Ground
Pin 5-6
−
TSOC
Ground
Data (DQ)
No Connect
No Connect
No Connect
ORDERING INFORMATION
DS2401
TO-92 Package
DS2401Z SOT-223 Surface Mount Package
DS2401T Tape & Reel of DS2401
DS2401T-SL Like DS2401T but straight leads
DS2401Y Tape & Reel of DS2401Z
DS2401P TSOC Surface Mount Package
DS2401V Tape & Reel of DS2401P
DS2401X1 Chip Scale Pkg., Tape & Reel
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102199
1 page  
DS2401
1-WIRE SIGNALING
The DS2401 requires a strict protocol to ensure data integrity. The protocol consists of four types of
signaling on one line: reset sequence with Reset Pulse and Presence Pulse, write 0, write 1 and read data.
All these signals except Presence Pulse are initiated by the bus master.
The initialization sequence required to begin any communication with the DS2401 is shown in Figure 5.
A reset pulse followed by a Presence Pulse indicates the DS2401 is ready to send or receive data given
the correct ROM command.
The bus master transmits (TX ) a reset pulse (tRSTL , minimum 480 µs). The bus master then releases the
line and goes into receive mode (RX ). The 1-Wire bus is pulled to a high state via the 5 kΩ pullup
resistor. After detecting the rising edge on the data pin, the DS2401 waits (tPDH, 15-60 µs) and then
transmits the Presence Pulse (tPDL , 60-240 µs).
READ/WRITE TIME SLOTS
The definitions of write and read time slots are illustrated in Figure 6. All time slots are initiated by the
master driving the data line low. The falling edge of the data line synchronizes the DS2401 to the master
by triggering a delay circuit in the DS2401. During write time slots, the delay circuit determines when the
DS2401 will sample the data line. For a read data time slot, if a “0” is to be transmitted, the delay circuit
determines how long the DS2401 will hold the data line low overriding the “1” generated by the master.
If the data bit is a 1, the DS2401 will leave the read data time slot unchanged.
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102199
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet DS2401.PDF ] | |
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