DS2482X-101+T Maxim Integrated Products, DS2482X-101+T Datasheet - Page 5

• Manufacturer Part Number: DS2482X-101+T
• Description: IC MASTER I2C-1WIRE 1CH 9-WLP
• Manufacturer: Maxim Integrated Products

Specifications of DS2482X-101+T

• Controller Type: I²C Bus Controller
• Interface: I²C
• Voltage - Supply: 2.9 V ~ 5.5 V
• Current - Supply: 750µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 9-WLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. Block Diagram
The DS2482-101 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 DS2482-101 performs
Single-Channel 1-Wire Master with Sleep Mode
PIN
A1
A2
A3
B1
B2
B3
C2
C3
NAME
PCTLZ
SLPZ
GND
AD0
SDA
SCL
V
IO
CC
_______________________________________________________________________________________
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.
Active-Low Control Input to Activate Low-Power Sleep Mode. This pin should be driven by a push-pull port.
I
I
I
Power-Supply Input
Ground Reference
Input/Output Driver for 1-Wire Line
2
2
2
C Address Input. Must be connected to V
C Serial Clock Input. Must be connected to V
C Serial Data Input/Output. Must be connected to V
Detailed Description
SLPZ
SDA
SCL
AD0
CONFIGURATION
CONTROLLER
INTERFACE
REGISTER
I
2
C
INPUT/OUTPUT
CONTROLLER
T-TIME OSC
READ DATA
REGISTER
REGISTER
CC
STATUS
or GND.
CC
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 DS2482-101 communicates with a host
processor through its I
mode or in fast mode. The logic state of the address
pin determines the I
DS2482-101, allowing two devices operating on the
same bus segment without requiring a hub. See
Figure 1 for a block diagram.
FUNCTION
through a pullup resistor.
CC
through a pullup resistor.
DS2482-101
XCVR
LINE
2
2
C bus interface in standard
C slave address of the
IO
PCTLZ
Pin Description
5