DS2482S-101+TR

更新时间： 2024-02-11 17:37:54

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
24页	345K
描述
Single-Channel 1-Wire Master with Sleep Mode

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技术参数
数据手册

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DS2482S-101+TR 技术参数

是否Rohs认证：	符合	生命周期：	Active
零件包装代码：	SOIC	包装说明：	SOP,
针数：	8	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.07	其他特性：	ALSO OPERATES AT 5V SUPPLY
内置保护：	OVER CURRENT	接口集成电路类型：	BUFFER OR INVERTER BASED PERIPHERAL DRIVER
JESD-30 代码：	R-PDSO-G8	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
输出电流流向：	SOURCE	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）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	1.75 mm
最大供电电压：	5.5 V	最小供电电压：	2.9 V
标称供电电压：	3.3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	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

DS2482S-101+TR 数据手册

Single-Channel 1-Wire Master with Sleep Mode

DS482-01

Strong Pullup (SPU)

The SPU bit is used to activate the strong pullup func-

tion prior to a 1-Wire Write Byte or 1-Wire Single Bit

command. Strong pullup is commonly used with 1-Wire

EEPROM devices when copying scratchpad data to the

main memory or when performing an SHA-1 computa-

tion and with parasitically powered temperature sen-

sors or A/D converters. The respective device data

sheets specify the location in the communications pro-

tocol after which the strong pullup should be applied.

The SPU bit must be set immediately prior to issuing

the command that puts the 1-Wire device into the state

where it needs the extra power. The strong pullup uses

the same internal pullup transistor as the active pullup

feature. For cases where the internal strong pullup has

insufficient strength, the PCTLZ pin can be used to con-

trol an external p-channel MOSFET to supply additional

power beyond the drive capability of the DS2482-101 to

typical case); the SPU bit in the Configuration Register

is written to 0; or the DS2482-101 receives the Device

Reset command. As long as the strong pullup is active,

the PCTLZ output is low. When the strong pullup ends,

the SPU bit is automatically reset to 0. Using the strong

pullup feature does not change the state of the APU bit

in the Configuration Register.

1-Wire Speed (1WS)

The 1WS bit determines the timing of any 1-Wire com-

munication generated by the DS2482-101. All 1-Wire

slave devices support standard speed (1WS = 0),

where the transfer of a single bit (t

in Figure 3) is

SLOT

completed within 65µs. Many 1-Wire devices can also

communicate at a higher data rate, called overdrive

speed. To change from standard to overdrive speed, a

1-Wire device needs to receive an Overdrive-Skip ROM

or Overdrive-Match ROM command, as explained in

the 1-Wire device data sheets. The change in speed

occurs immediately after the 1-Wire device has

received the speed-changing command code. The

DS2482-101 must take part in this speed change to

stay synchronized. This is accomplished by writing to

the Configuration Register with the 1WS bit as 1 imme-

diately after the 1-Wire Byte command that changes the

speed of a 1-Wire device. Writing to the Configuration

Reset command, changes the DS2482-101 and any

1-Wire devices on the active 1-Wire line back to stan-

dard speed.

the 1-Wire line. See the ΔV

parameter in the

STRPU

Electrical Characteristics to determine if the internal

strong pullup is sufficient given the current load on the

device.

If SPU is 1, the DS2482-101 treats the rising edge of the

time slot in which the strong pullup starts as if the active

pullup was activated. However, in contrast to the active

pullup, the strong pullup, i.e., the internal pullup transis-

tor, remains conducting, as shown in Figure 3, until one

of three events occurs: the DS2482-101 receives a

command that generates 1-Wire communication (the

LAST BIT OF 1-Wire WRITE BYTE OR 1-Wire SINGLE BIT FUNCTION

WRITE-ONE CASE

TIME SLOT

OR 1-Wire

RESET

WRITE-ZERO CASE

SLOT

PCTLZ

DS2482-101 RESISTIVE PULLUP

DS2482-101 PULLDOWN

DS2482-101 STRONG PULLUP

Figure 3. Low-Impedance Pullup Timing

_______________________________________________________________________________________

1...4 5 678 9 10...24

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与DS2482S-101+TR相关器件

型号	品牌	描述	获取价格	数据表
DS2482S-800	DALLAS	Eight-Channel 1-Wire Master	获取价格
DS2482S-800/T&R	MAXIM	Buffer/Inverter Based Peripheral Driver, PDSO16, 0.150 INCH, SOP-16	获取价格
DS2482S-800/T&R	DALLAS	Eight-Channel 1-Wire Master	获取价格
DS2482S-800+	MAXIM	Eight-Channel 1-Wire Master	获取价格
DS2482S-800+T&R	MAXIM	Buffer/Inverter Based Peripheral Driver, PDSO16, 0.150 INCH, ROHS COMPLIANT, SOP-16	获取价格
DS2482S-800+T&R	MAXIM	8-Channel 1-Wire Master	获取价格

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