DS1825U+

更新时间： 2024-02-14 15:50:40

品牌	Logo	应用领域
美信 - MAXIM		模拟IC 信号电路光电二极管
页数	文件大小	规格书
21页	286K
描述
Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID

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技术参数
数据手册

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DS1825U+ 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	TSSOP,	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	6 weeks
风险等级：	0.94	Samacsys Description：	Board Mount Temperature Sensors Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	S-PDSO-G8
JESD-609代码：	e3	长度：	3 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	8	最高工作温度：	125 °C
最低工作温度：	-55 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装形状：	SQUARE
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.1 mm
最大供电电压 (Vsup)：	3.7 V	最小供电电压 (Vsup)：	3 V
表面贴装：	YES	温度等级：	MILITARY
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	宽度：	3 mm

DS1825U+ 数据手册

Figure 15. READ/WRITE T^DIM^S1E⁸²S⁵L^PrO^ogT^ramT^mIM^abI^lN^{e R}G^esD^oluIA^tioG^{n 1}R^-WA^irM^{e Digital Thermometer With 4-Bit ID}

START

OF SLOT

MASTER WRITE “0” SLOT

MASTER WRITE “1” SLOT

1 ꢀs < T_REC< A

60 ꢀs < T_X“0” < 120 ꢀs

> 1 ꢀs

V_PU

1-WIRE BUS

GND

DS1825 Samples

MIN

TYP

MAX

MIN

TYP

MAX

15 ꢀs

30 ꢀs

MASTER READ “0” SLOT

MASTER READ “1” SLOT

1 ꢀs < T_REC< A

V_PU

1-WIRE BUS

GND

> 1 ꢀs

Master samples

> 1 ꢀs

15 ꢀs

45 ꢀs

15 ꢀs

LINE TYPE LEGEND

Bus master pulling low

DS1825 pulling low

Resistor pullup

READ TIME SLOTS

The DS1825 can only transmit data to the master when the master issues read time slots. Therefore, the master

must generate read time slots immediately after issuing a Read Scratchpad [BEh] or Read Power Supply [B4h]

command, so that the DS1825 can provide the requested data. In addition, the master can generate read time slots

after issuing Convert T [44h] or Recall E²[B8h] commands to find out the status of the operation as explained in

the DS1825 FUNCTION COMMAND section.

All read time slots must be a minimum of 60ꢀs in duration with a minimum of a 1ꢀs recovery time between slots. A

read time slot is initiated by the master device pulling the 1-Wire bus low for a minimum of 1ꢀs and then releasing

the bus (see Figure 14). After the master initiates the read time slot, the DS1825 will begin transmitting a 1 or 0 on

bus. The DS1825 transmits a 1 by leaving the bus high and transmits a 0 by pulling the bus low. When transmitting

a 0, the DS1825 will release the bus by the end of the time slot, and the bus will be pulled back to its high idle state

by the pullup resister. Output data from the DS1825 is valid for 15ꢀs after the falling edge that initiated the read

time slot. Therefore, the master must release the bus and then sample the bus state within 15ꢀs from the start of

the slot.

Figure 15 illustrates that the sum of T_INIT, T_RC, and T_SAMPLEmust be less than 15ꢀs for a read time slot. Figure 16

shows that system timing margin is maximized by keeping T_INITand T_RCas short as possible and by locating the

master sample time during read time slots towards the end of the 15ꢀs period.

17 of 21

1...14 15 161718 19 20 21

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DS1830	DALLAS	Reset Sequence Pushbutton	获取价格
DS1830	MAXIM	Power Supply Support Circuit, Adjustable, 1 Channel, PDIP8,	获取价格
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DS1830+	MAXIM	Power Supply Support Circuit, Fixed, 1 Channel, PDIP8, 0.300 INCH, DIP-8	获取价格

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