Datasheet > DS2480B/T&R

DS2480B/T&R

更新时间： 2024-01-08 20:39:49

品牌	Logo	应用领域
美信 - MAXIM		驱动光电二极管接口集成电路驱动器
页数	文件大小	规格书
32页	478K
描述
Line Driver, 1 Func, 1 Driver, PDSO8, 0.150 INCH, SOP-8

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DS2480B/T&R 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：	0.150 INCH, SOP-8
针数：	8	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.4	差分输出：	NO
驱动器位数：	1	输入特性：	STANDARD
接口集成电路类型：	LINE DRIVER	接口标准：	EIA-232-C
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e0
长度：	4.9 mm	功能数量：	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	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	245
认证状态：	Not Qualified	最大接收延迟：
座面最大高度：	1.75 mm	最大供电电压：	5.5 V
最小供电电压：	4.5 V	标称供电电压：	5 V
表面贴装：	YES	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
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	3.9 mm
Base Number Matches：	1

DS2480B/T&R 数据手册

DS2480B

As data enters the core of the DS2480B’s logic circuitry, it is analyzed to separate data and command

bytes and to calibrate the device’s timing generator. The timing generator controls all speed relations of

the communication interface and the 1-Wire bus as well as the waveforms on the 1-Wire bus.

Command bytes either affect the configuration setting or generate certain waveforms on the 1-Wire bus.

Data bytes are simply translated by the protocol converter into the appropriate 1-Wire activities. Each

data byte generates a return byte from the 1-Wire bus that is communicated back to the host through the

RXD pin as soon as the activity on the 1-Wire bus is completed.

The 1-Wire driver shapes the slopes of the 1-Wire waveforms, applies programming pulses or strong

pullup to 5V and reads the 1-Wire bus using a non-TTL threshold to maximize the noise margin for best

performance on large 1-Wire networks.

Figure 1. DS2480B BLOCK DIAGRAM

DEVICE OPERATION

The DS2480B can be described as a complex state machine with two static and several dynamic states.

Two device-internal flags as well as functions assigned to certain bit positions in the command codes

determine the behavior of the chip, as shown in the state transition diagram (Figure 2). The DS2480B

requires and generates a communication protocol of 8 data bits per character, 1 stop bit and no parity. It is

permissible to use 2 stop bits on the TXD line. However, the DS2480B only asserts a single stop bit on

RXD.

When powering up, the DS2480B performs a master reset cycle and enters the Command Mode, which is one of the two

static states. The device now expects to receive one 1-Wire reset command on the TXD line sent by the host at a data rate of

9600bps (see Communication Commands section for details). This command byte is required solely for calibration of the baud

rate timing generator the DS2480B and is not translated into any activity on the 1-Wire bus. After this first command byte the

device is ready to receive and execute any command as described later in this document. NOTE: Baud rate calibration is valid

only for the V_DDoperating voltage at which calibration is performed. Post-calibration changes in V_DDby more than 5% may

cause calibration error to exceed ±5%. The DS2480B requires a 1-Wire reset command sent by the host at a data rate of

9600bps for calibration. Data rates of 115200bps or higher during calibration may put the DS2480B in an undefined state,

requiring a power-down reset to restore normal operation.

Maxim Integrated.............................................................................................................................................................................................3

1 234 5 6 7...32

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与DS2480B/T&R相关器件

型号	品牌	描述	获取价格	数据表
DS2480B+	MAXIM	Serial to 1-Wire Line Driver	获取价格
DS2480B+R	MAXIM	Serial to 1-Wire Line Driver	获取价格
DS2480B+T	MAXIM	Serial to 1-Wire Line Driver	获取价格
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

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