- 您现在的位置：买卖IC网 > PDF目录11137 > MAX7357ETG+T (Maxim Integrated Products)IC MULTIPLEXER 8X1 24TQFN PDF资料下载
参数资料
| 型号： | MAX7357ETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/22页 |
| 文件大小： | 0K |
| 描述： | IC MULTIPLEXER 8X1 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 多路复用器 |
| 电路： | 1 x 8:1 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 2.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
MAX7356/MAX7357/MAX7358
1-to-8 I2C Bus Switches/Multiplexers with Bus
Lock-Up Detection, Isolation, and Notification
10
______________________________________________________________________________________
Detailed Description
The MAX7356/MAX7357/MAX7358 devices are 1-to-8
I2C multiplexers/switches for connecting a large num-
ber of I2C components to a single master. The circuits
connect a main I2C bus to any combination of 8 extend-
ed I2C buses. They enable a master on the main bus to
isolate and communicate with devices or groups of
devices that may otherwise have slave address con-
flicts. Any extended bus can be connected or discon-
nected by control packets from the main I2C bus writing
to the main control register of these I2C switches.
The MAX7357/MAX7358 feature a built-in timer used to
monitor all extended buses, for lock-up conditions. If the
data line of any of these buses is low for more than
25ms, a lock condition is detected. An optional interrupt
can be generated through the bidirectional
RST/INT pin.
The master can read the bus lock-up register to find out
which extended bus is locked up. The master can also
optionally enable the MAX7357 or MAX7358 to send a
flush-out sequence on the faulty channel. There is an
optional preconnection check that can be enabled,
which toggles the extended bus clock and data line low
then high to ensure that the downstream bus is not
locked high prior to connecting it to the host bus.
The bus lock-up detection and isolation features are
enabled by writing a unique series of I2C commands to
the MAX7357/MAX7358.
Power-On Reset
When power is applied to VDD, an internal power-on
reset (POR) holds the MAX7356/MAX7357/MAX7358 in
a reset state until VDD has reached VPOR. At this point,
the reset condition is released and the MAX7356/
MAX7357/MAX7358 registers and I2C state machine
are initialized to their default states.
Basic Mode of Operation
The MAX7356/MAX7357/MAX7358 feature a basic
mode of operation. In basic mode, the device operates
solely as a collection of analog switches that enable
any combination of the extended buses (SC_, SD_)
to be connected to the host-side bus (SCL, SDA). Only
the switch control register is accessible in basic mode
of operation.
Enhanced Mode of Operation
(MAX7357/MAX7358)
The MAX7357 and MAX7358 feature an enhanced
mode of operation that enable features and registers
that are unavailable in the basic mode of operation.
When operating in enhanced mode, there are 7 regis-
ters available to the host. Features such as bus lock-up
detection, preconnection fault tests, and diagnostic
information are made available to the user. A special
sequence of commands can switch the MAX7357 or
MAX7358 from basic mode to enhanced mode, and a
simple write to the configuration register can switch the
devices from enhanced mode back to basic mode.
Entering Basic Mode from
Enhanced Mode
(MAX7357/MAX7358)
When the 7 registers of Table 2 are enabled, the
MAX7357 and MAX7358 can be put into basic mode by
setting bit B6 of the configuration register. When basic
mode is entered, the value of all registers return to their
POR value. B6 of the configuration register is also main-
tained to allow operation in basic mode. When in basic
mode, the MAX7357 and MAX7358 can be returned to
full feature mode by receiving a special sequence of
commands from the host as described below.
The sequence of I2C commands for enabling the
MAX7357 or MAX7358 enhanced features (bus lock-up
detection, isolation, and notification) as well as access
to the additional 6 registers consists of a write byte, a
read byte, another write byte, and another read byte
with no data bytes following any of these write or read
bytes, as shown in Figure 5. A write byte consists of
the 7-bit MAX7357 or MAX7358 device address fol-
lowed by a 0. A read byte consists of the 7-bit
MAX7357 or MAX7358 device address followed by a 1.
The special sequence begins with a START condition
and ends with a STOP condition. Repeated START
conditions are used to interconnect these write and
read bytes.
The complete special sequence of I2C commands
needs to be received by the MAX7357 or MAX7358 to
activate the enhanced mode.
ADDRESS OF MUX/SWT PART
S
START
0
A
Sr
ADDRESS OF MUX/SWT PART
0
A
Sr
ADDRESS OF MUX/SWT PART
1
A
Sr
ADDRESS OF MUX/SWT PART
1
A
P
W
ACKNOWLEDGE FROM THE
MAX7357 OR MAX7358
R
ACKNOWLEDGE FROM THE
MAX7357 OR MAX7358
W
ACKNOWLEDGE FROM THE
MAX7357 OR MAX7358
R
ACKNOWLEDGE FROM THE
MAX7357 OR MAX7358
STOP
Figure 5. The Special Sequence of I2C Commands for Turning on the Full Feature
相关PDF资料 |
PDF描述 |
|---|---|
| MAX7357EUG+T | IC MULTIPLEXER 8X1 24TSSOP |
| VI-BWY-IW-F2 | CONVERTER MOD DC/DC 3.3V 66W |
| MAX4527CSA+T | IC SWITCH DUAL SPDT 8SOIC |
| VE-J6D-IW-F2 | CONVERTER MOD DC/DC 85V 100W |
| VI-BWX-IY-F3 | CONVERTER MOD DC/DC 5.2V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7357EUG+ | 功能描述:多路器开关 IC 1-to-8 I2C Bus Switch/MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX7357EUG+T | 功能描述:多路器开关 IC 1-to-8 I2C Bus Switch/MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX7358ETG+ | 功能描述:多路器开关 IC 1-to-8 I2C Bus Switch/MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX7358ETG+T | 功能描述:多路器开关 IC 1-to-8 I2C Bus Switch/MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX7358EUG+ | 功能描述:多路器开关 IC 1-to-8 I2C Bus Switch/MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
发布紧急采购，3分钟左右您将得到回复。