DS2482S-800+ Maxim Integrated Products, DS2482S-800+ Datasheet - Page 5

• Manufacturer Part Number: DS2482S-800+
• Description: IC I2C TO 1WIRE BRIDGE 16SOIC
• Manufacturer: Maxim Integrated Products
• Type: Eight Channel 1 Wire Masterr

Specifications of DS2482S-800+

• Controller Type: I²C Bus Controller
• Interface: I²C
• Voltage - Supply: 3.3 V, 5V
• Current - Supply: 750µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Package: 16SOIC N
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. Block Diagram
The DS2482-100 is a self-timed 1-Wire master that sup-
ports advanced 1-Wire waveform features including
standard and overdrive speeds, active pullup, and
strong pullup for power delivery. The active pullup
affects rising edges on the 1-Wire side. The strong
pullup function uses the same pullup transistor as the
active pullup, but with a different control algorithm. In
addition, the strong pullup activates the PCTLZ pin,
controlling optional external circuitry to deliver addition-
al power beyond the capabilities of the on-chip pullup
transistor. Once supplied with command and data, the
input/output controller of the DS2482-100 performs
SO
1
2
3
4
5
6
7
8
PIN
WLP
B3
C3
C2
B1
B2
A1
A2
A3
_______________________________________________________________________________________
NAME
PCTLZ
GND
SDA
AD1
AD0
SCL
V
Detailed Description
IO
CC
SDA
SCL
AD0
AD1
Power-Supply Input
Input/Output Driver for 1-Wire Line
Ground Reference
I
I
Active-Low Control Output for an External p-Channel MOSFET. Provides extra power to the 1-Wire
line, e.g., for use with 1-Wire devices that require a higher current temporarily to operate.
I
address of the device (see Figure 8).
2
2
2
C Serial Clock Input. Must be connected to V
C Serial Data Input/Output. Must be connected to V
C Address Inputs. Must be connected to V
CONFIGURATION
CONTROLLER
INTERFACE
REGISTER
I
2
C
Single-Channel 1-Wire Master
INPUT/OUTPUT
CONTROLLER
T-TIME OSC
READ DATA
REGISTER
REGISTER
STATUS
time-critical 1-Wire communication functions such as
reset/presence-detect cycle, read-byte, write-byte, sin-
gle-bit R/W, and triplet for ROM Search, without requir-
ing interaction with the host processor. The host obtains
feedback (completion of a 1-Wire function, presence
pulse, 1-Wire short, search direction taken) through the
Status Register and data through the Read Data
Register. The DS2482-100 communicates with a host
processor through its I
mode or in fast mode. The logic state of two address pins
determines the I
allowing up to four devices operating on the same bus
segment without requiring a hub. See Figure 1 for a block
diagram.
FUNCTION
CC
DS2482-100
CC
or GND. These inputs determine the I
through a pullup resistor.
XCVR
LINE
CC
2
C slave address of the DS2482-100,
through a pullup resistor.
2
C bus interface in standard
IO
PCTLZ
Pin Description
2
C slave
5