Datasheet > 驱动程序和接口 > 线路驱动器或接收器> DS2480B+T

DS2480B+T

更新时间： 2024-02-18 13:44:02

品牌	Logo	应用领域
美信 - MAXIM		驱动器
页数	文件大小	规格书
32页	702K
描述
Serial to 1-Wire Line Driver

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技术参数
数据手册

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DS2480B+T 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	SOP, SOP8,.25
针数：	8	Reach Compliance Code：	not_compliant
风险等级：	5.87	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e0	湿度敏感等级：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装等效代码：	SOP8,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
电源：	5 V	认证状态：	Not Qualified
子类别：	Serial IO/Communication Controllers	标称供电电压：	5 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL

DS2480B+T 数据手册

DS2480B

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

GND

Ground Pin. Common ground reference and ground return for 1-Wire bus

1-Wire Input/Output Pin. 1-Wire bus with slew-rate-controlled pulldown,

active pullup, ability to switch in V_PPto program EPROM, and ability to switch

in V_DDthrough a low-impedance path to program EEPROM, or perform a

temperature conversion.

1-W

N.C.

V_DD

No Connection

Power Input Pin. Power supply for the chip and 1-Wire pullup voltage, 5V

±10%, must always be lower than or equal to V_PP. V_DDshould be derived from

V_PPby a separate voltage regulator whenever possible.

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.

V_PP

RXD/TXD Polarity Select. RXD/TXD polarity select; tied to GND for RS232

(12V or 5V) connection; tied to V_DDfor direct connection to UART chip.

Serial Data from UART. Data input from host (inverted or true); maximum

voltage swing -0.3V to V_DD+ 0.3V; for logic thresholds see DC specifications.

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.

POL

TXD

RXD

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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与DS2480B+T相关器件

型号	品牌	描述	获取价格	数据表
DS2480B+T&R	MAXIM	Line Driver, 1 Func, 1 Driver, PDSO8, 0.150 INCH, ROHS COMPLIANT, SOP-8	获取价格
DS2480BS	DALLAS	Serial 1-Wire Line Driver with Load Sensor	获取价格
DS2480S	DALLAS	Serial 1.Wire Line Driver	获取价格
DS2482-100	DALLAS	Single-Channel 1-Wire Master	获取价格
DS2482-100	MAXIM	Single-Channel 1-Wire Master	获取价格
DS2482-100	ADI	单通道1-Wire主控制器	获取价格

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