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參數(shù)資料
| 型號： | LTC1840 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | RSO-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 05V; Power: 1W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protectionwith Current Foldback; Low Noise; No External Capacitor needed; Efficiency to 83% |
| 中文描述： | 雙風(fēng)扇控制器，帶有2線接口 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 203K |
| 代理商： | LTC1840 |
LTC1840
7
1840f
START
1 1 1 B4 B3 B2 B1
X X X X X R2 R1 R0
WR
ACK
ACK
D7 D6 D5 D4 D3 D2 D1 D0
ACK
STOP
SLAVE
ADDRESS
REGISTER
ADDRESS
S
0
S
0
S
0
0
DATA
BYTE
1
1
1
1
1
1
7
8
8
START
1 1 1 B4 B3 B2 B1
X X X X X R2 R1 R0
WR
ACK
ACK
D7 D6 D5 D4 D3 D2 D1 D0
ACK
STOP
SLAVE
ADDRESS
REGISTER
ADDRESS
S
0
S
0
M
1
0
DATA
BYTE
1
1
1
1
ACK
S
0
1
1
1
7
START
1 1 1 B4 B3 B2 B1
RD
SLAVE
ADDRESS
1
1
1
7
8
8
1840 TD03
Serial Interface
Simple 2-wire interface
Multiple devices on same bus
Idle bus must have SDA and SCL lines high
LTC1840 is read/write
Master controls bus
Devices listen for unique address that precedes data
The START and STOP Conditions
When the bus is not in use, both SCL and SDA must be
high. A bus master signals the beginning of a transmission
with a START condition by transitioning SDA from high to
low while SCL is high. When the master has finished
communicating with the slave, it issues a STOP condition
by transitioning SDA from low to high while SCL is high.
The bus is then free for another transmission.
Acknowledge
The acknowledge signal is used for handshaking between
the master and the slave. An acknowledge (LOW active)
generated by the slave lets the master know that the latest
byte of information was received. The acknowledge-
related clock pulse is generated by the master. The trans-
mitter master releases the SDA line (HIGH) during the
acknowledge clock pulse. The slave receiver must pull
down the SDA line during the acknowledge clock pulse so
that it remains stable LOW during the HIGH period of this
clock pulse.
When a slave receiver doesn’t acknowledge the slave
address (for example, it’s unable to receive because it’s
performing some real-time function), the data line must be
left HIGH by the slave. The master can then generate a
STOP condition to abort the transfer.
If a slave receiver acknowledges the slave address, but
some time later in the transfer cannot receive any more
data bytes, the master must again abort the transfer. This
is indicated by the slave generating the “not acknowledge”
on the first byte to follow. The slave leaves the data line
HIGH and the master generates the STOP condition.
Commands Supported
The LTC1840 supports read byte, write byte, read word
(the second data byte will be all ones) and write word (the
second data byte will be ignored) commands.
Data Transfer Timing for Write Commands
In order to help assure that bad data is not written into the
LTC1840, data from a write command is only stored after
a valid acknowledge has been performed. The part will
detect that SDA is low on the rising edge of SCL that marks
the end of the period in which the LTC1840 acknowledges
the data write and then latch the data during the following
SCL low period.
OPERATIOU
LTC1840 Write Byte Protocol
LTC1840 Read Byte Protocol
Typical 2-Wire Serial I
2
C or SMBus Transmission
STOP
CONDITION
8
1-7
9
8
1-7
9
8
1-7
9
S
P
START
CONDITION
ADDRESS
ACK
ACK
ACK
R/W
DATA
DATA
SDA
SCL
1840 TD02
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| LTC1840CGN | 功能描述:IC DUAL FAN CONTROLLER 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動器 系列:- 產(chǎn)品變化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:DC 電機(jī)控制器，無刷（BLDC），3 相 評估套件:可供 輸出數(shù):1 電流 - 輸出:100mA 電壓 - 負(fù)載:5.25 V ~ 20 V 電源電壓:5.25 V ~ 20 V 工作溫度:-40°C ~ 150°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-VQFN（7x7） 包裝:剪切帶 (CT) 其它名稱:ATA6833-PLQWCT |
| LTC1840CGN#PBF | 功能描述:IC CTLR DUAL FAN 2WIRE 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動器 系列:- 產(chǎn)品變化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:DC 電機(jī)控制器，無刷（BLDC），3 相 評估套件:可供 輸出數(shù):1 電流 - 輸出:100mA 電壓 - 負(fù)載:5.25 V ~ 20 V 電源電壓:5.25 V ~ 20 V 工作溫度:-40°C ~ 150°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-VQFN（7x7） 包裝:剪切帶 (CT) 其它名稱:ATA6833-PLQWCT |
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| LTC1840CGN#TRPBF | 功能描述:IC DUAL FAN CONTROLLER 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動器 系列:- 產(chǎn)品變化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:DC 電機(jī)控制器，無刷（BLDC），3 相 評估套件:可供 輸出數(shù):1 電流 - 輸出:100mA 電壓 - 負(fù)載:5.25 V ~ 20 V 電源電壓:5.25 V ~ 20 V 工作溫度:-40°C ~ 150°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-VQFN（7x7） 包裝:剪切帶 (CT) 其它名稱:ATA6833-PLQWCT |
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