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參數(shù)資料
| 型號： | DS2480B+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 12/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LINE DRVR W/SENSOR 1-W 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 100 |
| 類型： | 線路驅(qū)動器，發(fā)射器 |
| 驅(qū)動器/接收器數(shù)： | 1/0 |
| 規(guī)程： | RS232 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1429 (CN2011-ZH PDF) |
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DS2480B
Maxim Integrated............................................................................................................................................................................................. 2
DS2480B uses a unique protocol that merges data and control information without requiring control pins.
This approach maintains compatibility to off-the-shelf serial to wireless converters, allowing easy
realization of 1-Wire media jumpers. The various control functions of the DS2480B are optimized for 1-
Wire networks and support the special needs of all current 1-Wire devices including EPROM-based add-
only memories, EEPROM devices, and 1-Wire thermometers. See Application Note 192: Using the
DS2480B Serial 1-Wire Driver for detailed software examples.
DETAILED PIN DESCRIPTION
PIN
SYMBOL DESCRIPTION
1
GND
Ground Pin. Common ground reference and ground return for 1-Wire bus
2
1-W
1-Wire Input/Output Pin. 1-Wire bus with slew-rate-controlled pulldown,
active pullup, ability to switch in VPP to program EPROM, and ability to switch
in VDD through a low-impedance path to program EEPROM, or perform a
temperature conversion.
3
N.C.
No Connection
4
VDD
Power Input Pin. Power supply for the chip and 1-Wire pullup voltage, 5V
±10%, must always be lower than or equal to VPP. VDD should be derived from
VPP by a separate voltage regulator whenever possible.
5
VPP
EPROM Programming Voltage. 12V supply input for EPROM programming.
If EPROM programming is not required, connect this pin directly to the system’s
5V supply.
6
POL
RXD/TXD Polarity Select. RXD/TXD polarity select; tied to GND for RS232
(12V or 5V) connection; tied to VDD for direct connection to UART chip.
7
TXD
Serial Data from UART. Data input from host (inverted or true); maximum
voltage swing -0.3V to VDD + 0.3V; for logic thresholds see DC specifications.
8
RXD
Serial Data to UART. Signal output to host; push-pull driver with CMOS
compatible levels; for true ±12V RS232 systems an external level translator must
be provided.
OVERVIEW
The DS2480B directly interfaces a 5V serial communication port with its lines TXD (transmit) and RXD
(receive) to a 1-Wire bus. In addition the device performs a speed conversion allowing the data rate at the
communication port to be different from the 1-Wire data rate. Several parameters relating to the 1-Wire
port and its timing as well as the communication speed at both the port and the 1-Wire bus are
configurable. The circuit to achieve these functions is outlined in the block diagram (see Figure 1).
The device gets its input data from the serial communication port of the host computer through pin TXD.
For compatibility with active-high as well as active-low systems, the incoming signal can be inverted by
means of the polarity input POL. The polarity chosen by hard-wiring the logic level of this pin is also
valid for the output pin RXD. If for minimizing the interface hardware an asymmetry between RXD and
TXD is desired, this can be achieved by setting the most significant bit of the speed control parameter to a
1 (see Configuration Parameter Value Codes). With the MS bit of the speed control set to 1, the polarity
at TXD is still selected by the logic level at POL, but the polarity at RXD will be the opposite of what the
logic level at POL specifies.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2480B | 制造商:Maxim Integrated Products 功能描述:IC SERIAL LINE DRIVER 2480 SOIC8 |
| DS2480B/T&R | 功能描述:緩沖器和線路驅(qū)動器 RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| DS2480B+ | 功能描述:緩沖器和線路驅(qū)動器 Serial - 1-Wire Line Driver RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| DS2480B+R | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Serial to 1-Wire Line Driver |
| DS2480B+T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Serial to 1-Wire Line Driver |
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