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參數資料
| 型號： | DS1482S+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 1/7頁 |
| 文件大小： | 0K |
| 描述： | IC LEVEL SHIFT 1-WIRE 16-SOIC |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 50 |
| 類型： | 線路驅動器，發射器 |
| 驅動器/接收器數： | 1/1 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 16-SOIC W |
| 包裝： | 管件 |
1 of 7
112205
DS1482
1-Wire Level Shifter and Line Driver
with Load Sensor
www.maxim-ic.com
FEATURES
Works with All iButtons
and 1-Wire
Devices
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
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
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCCQ
N.C.
SPU
START
TXD
N.C.
GND
N.C.
VCC
N.C.
PCTLZ
DONE
RXD
N.C.
I/O
N.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.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1482S/R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1-Wire Level Shifter and Line Driver with Load Sensor |
| DS1482S/T | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1-Wire Level Shifter and Line Driver with Load Sensor |
| DS1482S/T&R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1-Wire Level Shifter and Line Driver with Load Sensor |
| DS1482S+ | 功能描述:IC LEVEL SHIFT 1-WIRE 16-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:25 系列:- 類型:收發器 驅動器/接收器數:2/2 規程:RS232 電源電壓:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 供應商設備封裝:16-PDIP 包裝:管件 |
| DS1482S+T&R | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
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