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参数资料
| 型号： | LTC4302CMS-2#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/20页 |
| 文件大小： | 298K |
| 描述： | IC BUS BUFFER 2-WIRE 10-MSOP |
| 标准包装： | 50 |
| 类型： | 热交换开关 |
| 应用： | 通用型缓冲器/总线扩展器 |
| 内部开关： | 是 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
LTC4302-1/LTC4302-2
13
sn430212 430212fs
Data Transfer Timing for Write Commands
In order to help ensure that bad data is not written into the
LTC4302, data from a write command is only stored after
a valid Stop Bit has been performed. If a Start Bit occurs
after new data bytes have been written but before a Stop
Bit is issued, the new data bytes are lost. In this case, the
master must readdress the part, rewrite the data bytes and
issue a Stop Bit before issuing any Start Bits to properly
update the registers. Also note that driving the CONN pin
low asynchronously resets the registers to their default
states, as specified in Tables 2 and 3. When CONN is driven
back high, the registers remain in the default state.
Reading from the LTC4302
The LTC4302 can be read using three different formats, as
shown in Figures 7 through 9. Each format begins with a
Start Bit, followed by the Address Byte, as discussed
above. The procedure for reading one data byte is given by
the SMBus Receive Byte protocol, illustrated in Figure 7.
The bits of the Data Byte are read from the LTC4302s
Register 1. Table 2 defines the functions of these control
bits. While only the first 3 bits of Register 1 can be written,
the first 5 bits contain useful information to be read. The
two added bits indicate the logic state of the GPIO pins.
The 3 LSBs are not used and are always 000.
The format for reading two data bytes is shown in Figure
8. The Address Byte and first Data Byte are exactly the
same as they are for the Receive Byte protocol. After the
first Data Byte, the master transmits an Acknowledge
indicating that it wants to read another data byte. The bits
contained in Register 2 are then written onto the bus as
Data Byte 2. Table 3 defines the functions of these
control bits. The 2 LSBs are not used and are always 11.
The master signals a not acknowledge after the last
byte read.
The SMBus Read Word protocol can also be used to read
two bytes from the LTC4302, as shown in Figure 9. Note
that the first Address Byte and the Command Code consti-
tute a write operation. However, because these bytes are
followed immediately by a Start Bit and not a Stop Bit, the
data contained in the Command Code is not written into
the LTC4302. After the second Start Bit, the format is
exactly the same as shown in Figure 8.
OPERATIO
START
ACK
11 a4 - a0
WR
XXXXXXXX
1
1
7
1
8
S
0
0
ACK
1
S
0
COMMAND
CODE
SLAVE
ADDRESS
START
ACK
11 a4 - a0
RD
d7 - d3 000
1
1
7
1
8
S
1
0
ACK
1
M
0
DATA
BYTE 1
d7 - d2 11
8
1
M
1
STOP
1
DATA
BYTE 2
SLAVE
ADDRESS
4302 F09
ACK
Figure 9. Reading Two Bytes Using SMBus Read Word Protocol
START
ACK
11 a4 - a0
RD
d7 - d3 000
1
1
7
1
8
S
1
0
ACK
1
M
1
DATA
BYTE
SLAVE
ADDRESS
STOP
1
4302 F07
Figure 7. Reading One Byte Using Receive Byte Protocol
START
ACK
11 a4 - a0
RD
d7 - d3 000
1
1
7
1
8
S
1
0
ACK
1
M
0
DATA
BYTE 1
d7 - d2 11
8
1
M
1
DATA
BYTE 2
SLAVE
ADDRESS
STOP
1
4302 F08
ACK
Figure 8. Reading Two Bytes
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4302IMS-1 | 功能描述:IC BUFFER BUS 2WR ADDRESS 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4302IMS-1#PBF | 功能描述:IC BUFFER 2-WIRE BUS 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4302IMS-1#TR | 功能描述:IC BUFFER BUS 2WR ADDRESS 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4302IMS-1#TRPBF | 功能描述:IC BUFFER 2-WIRE BUS 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4302IMS-2 | 功能描述:IC BUFFER BUS 2WR ADDRESS 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
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