DS2411P+ Maxim Integrated Products, DS2411P+ Datasheet - Page 4

• Manufacturer Part Number: DS2411P+
• Description: IC SILICON SERIAL NUMBER 6-TSOC
• Manufacturer: Maxim Integrated Products

Specifications of DS2411P+

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 6-TSOC
• Data Bus Width: 64 bit
• Interface Type: 1-Wire
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 1.5 V
• Supply Voltage Range: 1.5V To 5.25V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: TSOC
• No. Of Pins: 6
• Peak Reflow Compatible (260 C): Yes
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Note 11:
Note 12:
Note 13:
OPERATION
The DS2411’s registration number is accessed through a single data line. The 48-bit serial number, 8-bit
family code, and 8-bit CRC are retrieved using the Dallas 1-Wire protocol. This protocol defines bus
transactions in terms of the bus state during specified time slots that are bus-master-generated falling
edges on the I/O pin. All data is read and written least significant bit first. The device requires a delay
between V
may issue presence-detect pulses.
1-Wire BUS SYSTEM
The 1-Wire bus has a single bus master and one or more slaves. In all instances, the DS2411 is a slave
device. The bus master is typically either a microcontroller or a Dallas Semiconductor bridge chip such as
the DS2480, DS2490, or DS1481. The discussion of this bus system is broken down into three topics:
hardware configuration, transaction sequence, and 1-Wire signaling (signal type and timing).
Hardware Configuration
The 1-Wire bus has a single data line, I/O. It is important that each device on the bus be able to drive I/O
at the appropriate time. To facilitate this, each device has an open-drain or three-state output. The
DS2411 has an open-drain output with an internal circuit equivalent to that shown in Figure 3. The bus
master can have the same equivalent circuit. If a bidirectional pin is not available on the master, separate
output and input pins can be connected together. The bus requires a pullup resistor at the master end of
the bus, as shown in Figure 4. A multidrop bus consists of a 1-Wire bus with multiple slaves attached.
The 1-Wire bus has a maximum data rate of 15.4kbps in standard speed and 125kbps in overdrive.
The idle state for the 1-Wire bus is high. If a transaction needs to be suspended for any reason, I/O must
remain high if the transaction is to be resumed. If the bus is pulled low, slave devices on the bus will
interpret the low as either a timeslot, or a reset depending on the duration.
Figure 1. DS2411 REGISTRATION NUMBER
MSB
MSB
8-BIT CRC CODE
CC
power-up and initial 1-Wire communication, t
 represents the time required for the pullup circuitry to pull the voltage on I/O up V
V
 represents the time required for the pullup circuitry to pull the voltage on I/O up from
V
Interval begins when the voltage drops below V
when the voltage rises above V
TH
IL
to the input-high threshold of the bus master.
.
LSB
MSB
48-BIT SERIAL NUMBER
TH
during a positive edge on I/O.
4 of 11
PWRP
TL
during a negative edge on I/O and ends
(1200s). During this time the device
LSB
MSB
8-BIT FAMILY CODE
(01h)
LSB
LSB
IL
to