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DS2482S-100/T&R Datasheet

  • DS2482S-100/T&R

  • Single-Channel 1-Wire Master

  • 21頁(yè)

  • DALLAS   DALLAS

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DS2482-100
Single-Channel 1-Wire Master
www.maxim-ic.com
GENERAL DESCRIPTION
The DS2482-100 is an I虜C盲 to 1-Wire bridge device
that interfaces directly to standard (100kHz max) or
fast (400kHz max) I虜C masters to perform bi-
directional protocol conversion between the I虜C
master and any downstream 1-Wire slave devices.
Relative to any attached 1-Wire slave device, the
DS2482-100 is a 1-Wire master. Internal factory
trimmed timers relieve the system host processor
from generating time-critical 1-Wire waveforms,
supporting both standard and Overdrive 1-Wire
communication speeds. To optimize 1-Wire
waveform generation, the DS2482-100 performs slew
rate control on rising and falling 1-Wire edges and
provides additional programmable features to match
drive characteristics to the 1-Wire slave environment.
Programmable strong pullup features support 1-Wire
power delivery to 1-Wire devices such as EEPROMs
and sensors. The DS2482-100 combines these
features with an output to control an external
MOSFET for enhanced strong pullup application. The
I虜C slave address assignment is controlled by two
binary address inputs, resolving potential conflicts
with other I虜C slave devices in the system.
脪
FEATURES
摟
摟
摟
摟
摟
摟
摟
I虜C Host Interface, Supports 100kHz and 400kHz
I虜C Communication Speeds
1-Wire Master IO with Selectable Active or
Passive 1-Wire Pullup
Provides Reset/Presence, 8-Bit, Single-Bit, and
Three-Bit 1-Wire IO Sequences
Standard and Overdrive 1-Wire Communication
Speeds
Slew Controlled 1-Wire Edges
Selectable 1-Wire Slave Presence-Pulse Falling
Edge Masking to Control Fast Edges on the
1-Wire Line
Supports Low-Impedance 1-Wire Strong Pullup
for EEPROMs, Temp Sensors, or Other 1-Wire
Slaves that have Momentary High Current
Modes
2 Address Inputs for I虜C Address Assignment
Wide Operating Range: 2.9V to 5.5V, -40擄C to
+85擄C
8-Pin, 150-mil SO Package
摟
摟
摟
ORDERING INFORMATION
PART
DS2482S-100
DS2482S-100/T&R
TEMP RANGE
-40 to +85擄C
-40 to +85擄C
PIN-PACKAGE
8 SO (150 mil)
8 SO (150 mil)
APPLICATIONS
摟
摟
摟
摟
Printers
Medical Instruments
Industrial Sensors
Cell Phones, PDAs
TYPICAL OPERATING CIRCUIT
V
CC
*R
P
(I虜C port)
SDA
SCL
PCTLZ
Optional
circuitry
Current Limiting
Resistor
PIN CONFIGURATION
VCC
IO
GND
SCL
1-Wire
Device
1
2
3
4
8
7
6
5
AD0
AD1
PCTLZ
SDA
碌C
DS2482-100
AD0
AD1
*R
t
1-Wire line
IO
1-Wire
Device
1-Wire
Device
I
2
C is a trademark of Philips Corp. Purchase of I
2
C components of Maxim Integrated Products, Inc., or one of its Associated Companies,
conveys a license under the Philips I
2
C Patent Rights to use these components in an I
2
C system, provided that the system conforms to the I
2
C
Standard Specification as defined by Philips.
1-Wire is a Registered Trademark of Dallas Semiconductor.
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:
www.maxim-ic.com/errata.
1 of 21
REV: 110204

DS2482S-100/T&R 產(chǎn)品屬性

  • Maxim Integrated Products

  • Single Channel 1 Wire Master

  • + 85 C

  • SMD/SMT

  • SOIC-8 Narrow

  • - 40 C

  • Reel

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