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參數資料
| 型號： | DS2740U+T&R |
| 廠商： | Maxim Integrated |
| 文件頁數： | 10/16頁 |
| 文件大小： | 304K |
| 描述： | IC CURRENT GAUGE(15BIT) 8UMAX |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 3,000 |
| 功能： | 電流計（15 位） |
| 輸入電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
DS2740
Figure 9. 1-Wire BUS INTERFACE CIRCUITRY
10 of 16
TRANSACTION SEQUENCE
The protocol for accessing the DS2740 through the 1-Wire port is as follows:
Initialization
Net Address Command
Function Command
Transaction/Data
The sections that follow describe each of these steps in detail.
All transactions of the 1-Wire bus begin with an initialization sequence consisting of a reset pulse
transmitted by the bus master followed by a presence pulse simultaneously transmitted by the DS2740
and any other slaves on the bus. The presence pulse tells the bus master that one or more devices are on
the bus and ready to operate. For more details, see the 1-Wire Signaling section.
NET ADDRESS COMMANDS
Once the bus master has detected the presence of one or more slaves, it can issue one of the net address
commands described in the following paragraphs. The name of each net address command is followed by
the 8-bit opcode for that command in square brackets. Figure 10 presents a transaction flowchart of the
net address commands.
Read Net Address [33h or 39h]. This command allows the bus master to read the DS2740s 1-Wire net
address. This command can only be used if there is a single slave on the bus. If more than one slave is
present, a data collision occurs when all slaves try to transmit at the same time (open drain produces a
wired-AND result). The RNAOP bit in the status register selects the opcode for this command, with
RNAOP = 0 indicating 33h, and RNAOP = 1 indicating 39h.
Match Net Address [55h]. This command allows the bus master to specifically address one DS2740 on
the 1-Wire bus. Only the addressed DS2740 responds to any subsequent function command. All other
slave devices ignore the function command and wait for a reset pulse. This command can be used with
one or more slave devices on the bus.
1 A
(typ)
100?
MOSFET
Tx
Rx
Rx
Tx
Rx = RECEIVE
Tx = TRANSMIT
V
PULLUP
(2.0V to 5.5V)
4.7k
BUS MASTER
DS2740 1-Wire PORT
相關PDF資料 |
PDF描述 |
|---|---|
| DS28EA00U+T&R | IC THERMOMETER 1-WIRE 8-USOP |
| DS3920T-001+ | IC CURRENT MIRROR 5:1 SOT23-6 |
| DS4560LS-LO+T | IC SWITCH HOT-PLUG 12V 8-SOIC |
| DS600U+T&R | IC SENSOR TEMP 8-USOP |
| DS620U+ | IC THERMOMETER/STAT DIG 8MSOP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DS2741 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Current Monitor and Accumulator with Integrated Sense Resistor |
| DS2741_09 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Current Monitor and Accumulator with Integrated Sense Resistor |
| DS2741N+ | 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| DS2741N+T | 功能描述:電池管理 Current Monitor & Accumulator RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| DS2745 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Cost I2C Battery Monitor |
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