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参数资料
| 型号： | DS2480S |
| 英文描述： | Serial 1.Wire Line Driver |
| 中文描述： | 串行1.Wire线驱动器 |
| 文件页数： | 1/26页 |
| 文件大小： | 185K |
| 代理商： | DS2480S |
DS2480
Serial 1–Wire
TM
Line Driver
DS2480
042498 1/26
FEATURES
Universal, common–ground serial port to 1–Wire
TM
line driver for MicroLAN
TM
applications
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
±
5% tolerance for
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
PIN ASSIGNMENT
RXD
1–W
GND
POL
TXD
V
PP
8
7
6
5
8–PIN SOIC
(150 MIL)
NC
V
DD
1
2
3
4
PIN DESCRIPTION
GND
1–W
NC
V
DD
V
PP
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
POL
TXD
RXD
ORDERING INFORMATION
DS2480S
8–pin SOIC
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.
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.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2490 | USB to 1-Wire Bridge Chip |
| DS2490S | USB to 1-Wire Bridge Chip |
| DS2502-E64 | IEEE EUI-64 Node Address Chip |
| DS26334 | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
| DS26334G | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2482-100 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Single-Channel 1-Wire Master |
| DS2482-100_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master |
| DS2482-101 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master with Sleep Mode |
| DS2482-101_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master with Sleep Mode |
| DS2482-800 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:8-Channel 1-Wire Master |
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