DS2480S Dallas Semiconductor, DS2480S Datasheet

DS2480S

Manufacturer Part Number

DS2480S

Description

Manufacturer

Dallas Semiconductor

Datasheets

1.DS2480S.pdf (26 pages)

2.DS2480S.pdf (26 pages)

Specifications of DS2480S

Date_code

0425

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

DS2480S+

Manufacturer:

MAXIM/美信

Quantity:

20 000

Current page: 1 of 26
Download datasheet (186Kb)

FEATURES

DESCRIPTION

The DS2480 is a serial port to 1–Wire interface chip that

supports standard and Overdrive speeds. It connects

directly to UARTs and 5V RS232 systems. Interfacing to

RS232C ( 12V levels) requires a passive clamping cir-

cuit and one 5V to 12V level translator. Internal timers

relieve the host of the burden of generating the time–

critical 1–Wire communication waveforms. In contrast

to the DS9097(E) where a full character must be sent by

the host for each 1–Wire time slot, the DS2480 can

translate each character into eight 1–Wire time slots

thereby increasing the data throughput significantly. In

addition, the DS2480 can be set to communicate at four

different data rates including 115.2 kbps, 57.6 kbps and

19.2 kbps with 9.6 kbps being the power–on default.

Universal, common–ground serial port to 1–Wire

line driver for MicroLAN

Works with all iButtons and MicroLAN–compatible

1–Wire slave devices

Communicates at regular and Overdrive 1–Wire

speed and serial port data rates of 9600 (default),

19200, 57600 and 115200 bps

Supports 12V EPROM programming and stiff 5V

pull–up for Crypto iButton, sensors and EEPROM

Self–calibrating time base with

serial and 1–Wire communication

Slew rate controlled 1–Wire pull–down and active

pull–up to accommodate long lines and reduce radi-

ation

User–selectable RXD/TXD polarity minimizes com-

ponent count when interfacing to 5V based RS232

systems or directly to UARTs

Programmable 1–Wire timing and driver characteris-

tics accommodate a wide range of MicroLAN configu-

rations at regular speed

Smart protocol combines data and control information

without requiring extra pins

Compatible to optical, IR and RF to RS232 converters

Low cost 8–pin SOIC surface mount package

Operates over 4.5V to 5.5V from –40 C to +85 C

applications

5% tolerance for

PIN ASSIGNMENT

PIN DESCRIPTION

GND

1–W

POL

TXD

RXD

ORDERING INFORMATION

DS2480S

Command codes received from the host’s crystal con-

trolled UART serve as a reference to continuously cali-

brate the on–chip timing generator. The DS2480 uses a

unique protocol that merges data and control informa-

tion without requiring control pins. This approach main-

tains compatibility to off–the–shelf serial to wireless

converters allowing easy realization of 1–Wire media

jumpers. The various control functions of the DS2480

are optimized for MicroLAN 1–Wire networks and sup-

port the special needs of all current 1–Wire devices

including the Crypto iButton, EPROM–based Add–Only

Memories, EEPROM devices and 1–Wire Thermome-

ters.

Serial 1–Wire

GND

1–W

Ground

1–Wire Input/Output

No Connection

4.5 to 5.5 Volts

Optional EPROM

Programming Voltage

RXD/TXD Polarity Select

Serial Data from UART

Serial Data to UART

8–pin SOIC

8–PIN SOIC

(150 MIL)

Line Driver

RXD

TXD

POL

DS2480

042498 1/26

DS2480

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