DS2482-100 Single-Channel 1-Wire Master

Description

The DS2482-100 is an I²C to 1-Wire® bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I²C masters to perform bidirectional protocol conversion between the I²C 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 I²C slave address assignment is controlled by two binary address inputs, resolving potential conflicts with other I²C slave devices in the system.

Key Features

Applications/Uses

I²C Host Interface, Supports 100kHz and 400kHz I²C 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
Strong 1-Wire Pullup Provided by an Internal Low-Impedance Signal Path
PCTLZ Output to Optionally Control an External MOSFET for Stronger Pullup Requirements
Two Address Inputs for I²C Address Assignment
Operating Range: 2.9V to 5.5V, -40°C to +85°C
8-Pin, 150-mil SO Package and 9 WLP Package

	Cell Phones/PDAs
	Industrial Sensors
	Medical Instruments
	Printers

Key Specifications: 1-Wire Interface Products

Part Number

Functions

Features

V_SUPPLY
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Price

max w/pins

See Notes

DS2482-100

1-Wire Bridge

I2C to 1-Wire Bus Master with single 1-Wire I/O channel

2.9 to 5.5

SOIC(N)/8

WLP/8

$0.62 @1k

See All 1-Wire Interface Products (5)

Diagram

Typical Operating Circuit

Application Notes

Application Note 126: 1-Wire® Communication Through Software - DS2482-100
Application Note 3438: Serial Digital Data Networks - DS2482S-100
Application Note 3684: How to Use the DS2482 I²C 1-Wire® Master - DS2482-100
Application Note 3829: Determining the Recovery Time for Multiple-Slave 1-Wire Networks - DS2482-100
Application Note 3989: Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact - DS2482-100
Application Note 4002: Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications - DS2482-100
Application Note 4206: Choosing the Right 1-Wire® Master for Embedded Applications - DS2482-100
Application Note 4478: How to Implement SHA-1 Based Secure Authentication and System Feature Settings - DS2482-100

Design Guides

1-Wire® Products (PDF)

Reliability Reports

Reliability Report: DS2482-100.pdf

Request Reliability Report for:

Software/Models

none

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-5 of 5

DS2482-100 Free
Sample Buy Status Recommended Replacement

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

DS2482X-100+T

Active
WLP;8 pin;3 mm²
Outline Drawing: 21-0067 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: W92A1+1*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis

DS2482S-100 Free
Sample Buy Status Recommended Replacement

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

DS2482S-100/T&R N/A No Longer Available DS2482S-100+
SOIC(N);8 pin;31 mm²
Outline Drawing: 21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis

DS2482S-100 N/A No Longer Available DS2482S-100+
SOIC(N);8 pin;31 mm²
Outline Drawing: 21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis

DS2482S-100+

Active
SOIC(N);8 pin;31 mm²
Outline Drawing: 21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis

DS2482S-100+T&R

Active
SOIC(N);8 pin;31 mm²
Outline Drawing: 21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis

More Information

New Product Press Release 2004-08-11

Related Products

DS1WM Synthesizable 1-Wire Bus Master
DS2480B Serial to 1-Wire Line Driver
DS2482-800 Eight-Channel 1-Wire Master

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See All 1-Wire Interface Products (5 Products)

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2008-09-08
This page last modified: 2009-10-07