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參數(shù)資料
| 型號(hào)： | A8287SLB |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | LNB Supply and Control Voltage Regulator |
| 中文描述： | LNB電源和控制穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 8/17頁(yè) |
| 文件大?。?/td> | 527K |
| 代理商： | A8287SLB |
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8
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
D
P
2
A8285/A8287
LNB Supply and Control Voltage Regulator
Timing Considerations
The control sequence of the communication through the I
2
C
interface is composed of several steps in sequence:
1.
Start Condition
. De
fi
ned by a negative edge on the SDA
line, while SCL is high.
2.
Address Cycle
. 7 bits of address, plus 1 bit to indicate
read (1) or write (0), and an acknowledge bit. The
fi
rst
fi
ve bits of the address are
fi
xed as:
00010
. The four
optional addresses, de
fi
ned by the remaining two bits, are
selected by the ADD input. The address is transmitted
MSB
fi
rst.
3.
Data Cycles
. 8 bits of data followed by an acknowledge
bit. Multiple data bytes can be read. Data is transmitted
MSB
fi
rst.
4.
Stop Condition
. De
fi
ned by a positive edge on the SDA
line, while SCL is high.
Except to indicate a Start or Stop condition, SDA must be
stable while the clock is high. SDA can only be changed
while SCL is low. It is possible for the Start or Stop condition
to occur at any time during a data transfer. The A8285/A8287
always responds by resetting the data transfer sequence.
The Read/Write bit is used to determine the data transfer
direction. If the Read/Write bit is high, the master reads one
or more bytes from the A8285/A8287. If the Read/Write bit
is low, the master writes one byte to the A8285/A8287. Note
that multiple writes are not permitted. All write operations
must be preceded with the address.
The Acknowledge bit has two functions. It is used by the
master to determine if the slave device is responding to its
address and data, and it is used by the slave when the master
is reading data back from the slave. When the A8285/A8287
decodes the 7-bit address
fi
eld as a valid address, it responds
by pulling SDA low during the ninth clock cycle.
During a data write from the master, the A8285/A8287 also
pulls SDA low during the clock cycle that follows the data
byte, in order to indicate that the data has been successfully
received. In both cases, the master device must release the
1
2
3
4
5
6
7
8
9
0
0
0
1
0
A1 A0
0
AK
AK
D6 D5
D4 D3
D2 D1 D0
D7
Control Data
Address
Start
W
Stop
SDA
SCL
acknowledge
from LNBR
acknowledge
from LNBR
0
0
0
1
0
A1 A0
1
AK
D6 D5 D4 D3 D2 D1 D0
D7
NAK
Status Data
Address
Start
R
Stop
1
2
3
4
5
6
7
8
9
SDA
SCL
no acknowledge
from master
acknowledge
from LNBR
0
0
0
1
0
A1 A0
1
AK
D6 D5 D4 D3
D2 D1
D0
D7
D6 D5 D4 D3 D2 D1 D0
D7
AK
NAK
Status Data
Address
Start
R
Stop
Status Data
1
2
3
4
5
6
7
8
9
SDA
SCL
acknowledge
from master
acknowledge
from LNBR
no acknowledge
from master
Writing to the Register
Reading One Byte from the Register
Reading Multiple Bytes from the Register
Application Information
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A8287SLB-T | 制造商:Allegro MicroSystems LLC 功能描述: |
| A8287SLBTR | 功能描述:IC REG LNB SUPPLY/CTRL 24-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| A8287SLBTR-T | 功能描述:IC LNB SUPPLY/VOLTAGE REG 24SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調(diào)至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:30-TSSOP 包裝:帶卷 (TR) |
| A8290 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Single LNB Supply and Control Voltage Regulator |
| A8290SETTR-T | 功能描述:IC VOLTAGE REG SGL LNB 28-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
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