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DS1482S+

更新时间： 2024-01-22 10:19:28
品牌 Logo 应用领域
罗彻斯特 - ROCHESTER 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
8页 857K
描述
LINE DRIVER, PDSO16, SOP-16

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DS1482S+ 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：SOP,针数：16
Reach Compliance Code：unknown风险等级：5.62
Is Samacsys：N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：GENERAL PURPOSE
JESD-30 代码：R-PDSO-G16JESD-609代码：e3
长度：9.9 mm湿度敏感等级：1
功能数量：1端子数量：16
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）：260认证状态：COMMERCIAL
接收器位数：1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电源电压1-最大：3.6 V
电源电压1-分钟：3 V电源电压1-Nom：3.3 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：TIN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

DS1482S+ 数据手册

 浏览型号DS1482S+的Datasheet PDF文件第1页浏览型号DS1482S+的Datasheet PDF文件第3页浏览型号DS1482S+的Datasheet PDF文件第4页浏览型号DS1482S+的Datasheet PDF文件第5页浏览型号DS1482S+的Datasheet PDF文件第6页浏览型号DS1482S+的Datasheet PDF文件第7页 
DS1482  
1-Wire Level Shifter and Line Driver  
with Load Sensor  
www.maxim-ic.com  
FEATURES  
PIN ASSIGNMENT  
ꢀ Works with All iButtons® and 1-Wire®  
Devices  
VCCQ  
VCC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
N.C.  
N.C.  
ꢀ Communicates at Regular and Overdrive 1-  
Wire Speed (Host-Dependent)  
ꢀ Separate Interface Power Supply to Level  
Shift to Non-5V Systems  
ꢀ External Strong-Pullup Control Pin can be  
Used to Provide Low-On-Resistance-High  
Current Power Source  
SPU  
START  
TXD  
PCTLZ  
DONE  
RXD  
N.C.  
N.C.  
GND  
I/O  
N.C.  
N.C.  
ꢀ Load Sensor to Detect when Strong-Pullup  
Power Delivery is no Longer Needed  
ꢀ Power Delivery DONE Signal can be  
Connected to Host Interrupt  
ꢀ Low-Cost 16-Pin SO Surface-Mount Package  
ꢀ Operating Temperature Range: -40°C to  
+85°C  
ORDERING INFORMATION  
DS1482S  
SO-16  
DS1482S/T&R  
SO-16, Tape-and-Reel  
Contact the factory for versions with different  
signal polarities.  
DESCRIPTION  
The DS1482 is a simple 1-Wire line driver with load sensor and level shifter, designed to function as an  
interface between a 3V host system and a 1-Wire system that runs on 5V. Two supplies are provided, a  
5V supply for the 1-Wire operations (VCC) and an interface supply (VCCQ). The DS1482 can connect  
directly to a synchronous serial port if it supports the appropriate bit rates to generate 1-Wire timing.  
Figure 1 shows the DS1482 block diagram. TXD is buffered and controls an N-channel transistor, which  
drives the 1-Wire pin I/O low, e.g., to initiate a time slot. The logic level of the I/O pin is returned  
through a level-shifting buffer to the RXD pin for the host processor to read. Figure 3 shows the  
relationship of these signals in case of a 1-Wire read time slot.  
The SPU input generates a control signal (PCTLZ) for an external low-impedance PMOS transistor  
(Figure 2) that bypasses the 1-Wire pullup resistor (RPUP) to provide power for 1-Wire devices with a  
high-load current. PCTLZ is gated by the inverted TXD signal. This prevents a high through-current in  
case TXD and SPU are high at the same time.  
The DS1482 contains a high-precision comparator because it is important for the host micro to know  
when the high load on the 1-Wire side is no longer active. As shown in Figure 4, the high current load  
causes a small drop of the voltage on the I/O pin. The comparator detects when the high current phase  
ends, and enables DONE after the deglitching time tCF is over. The START signal allows the host micro  
to selectively enable DONE.  
iButton and 1-Wire are registered trademarks of Dallas Semiconductor.  
1 of 7  
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