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参数资料
| 型号： | MAX7326ATG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 16B 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 接口： | I²C |
| 输入/输出数： | 16 |
| 中断输出： | 是 |
| 频率 - 时钟： | 400kHz |
| 电源电压： | 1.71 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°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： | 管件 |
| 包括： | POR |
MAX7326
I2C Port Expander with 12 Push-Pull Outputs
and 4 Inputs
12
______________________________________________________________________________________
If a port input data change occurs during the read
sequence, then INT is reasserted during the I2C STOP
bit. The MAX7326 does not generate another interrupt
during a single-byte or multibyte read.
Input port data is sampled during the preceding I2C
acknowledge bit (the acknowledge bit for the I2C slave
address in the case of a single-byte or 2-byte read).
A multibyte read (more than 2 bytes before the I2C
STOP bit) from the group B ports of the MAX7326
repeatedly returns the status of the eight output ports,
read back as inputs.
A
single-byte write to the group A ports of the
MAX7326 sets the logic state of the four I/O ports and
the 4-bit interrupt mask register and clears both the
internal transition flags and INT output when the master
acknowledges the slave address byte.
A single-byte write to the output ports of the MAX7326
sets the logic state of all eight ports.
A
multibyte write to the group A ports of the MAX7326
repeatedly sets the logic state of the four I/O ports and
interrupt mask register.
A multibyte write to the group B ports of the MAX7326
repeatedly sets the logic state of all eight ports.
Reading from the MAX7326
A read from the group A ports of the MAX7326 starts
with the master transmitting the port group’s slave
address with the R/W bit set to high. The MAX7326
acknowledges the slave address and samples the
ports (takes a snapshot) during the acknowledge bit.
INT goes high (high impedance if an external pullup
resistor is not fitted) during the slave address acknowl-
edge. The master can then issue a STOP condition
after the acknowledge (Figure 6). The snapshot is not
taken, and the INT status remains unchanged if the
master terminates the serial transaction with no
acknowledge.
Typically, the master reads 1 or 2 bytes from the
MAX7326 with each byte being acknowledged by the
master upon reception.
The master can read one byte from the group A ports of
the MAX7326 and issues a STOP condition (Figure 6). In
this case, the MAX7326 transmits the current port data,
clears the transition flags, and resets the transition
detection. INT goes high (high impedance if an external
pullup resistor is not fitted) during the slave address
acknowledge. The new snapshot data is the current
port data transmitted to the master, and therefore, port
changes occuring during the transmission are detected.
INT remains high until the STOP condition.
SCL
MAX7326 SLAVE ADDRESS
SA
P
1
PORTS
INT OUTPUT
R/W
ACKNOWLEDGE
FROM MAX7326
ACKNOWLEDGE
FROM MASTER
PORT SNAPSHOT
tIV
tPH
tIR
A
O0
O1
I2
I3
I4
I5
O6
O7
D0
D1
D2
D3
D4
D5
D6
D7
PORT SNAPSHOT
tPS
tIP
INT REMAINS HIGH UNTIL STOP CONDITION
S = START CONDITION
P = STOP CONDITION
A = ACKNOWLEDGE FROM MASTER
Figure 6. Reading Group A Ports of the MAX7326 (1 Data Byte)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7326ATG+ | 功能描述:接口-I/O扩展器 I2C Port Expander w/12 P-P Out & 4 In RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| MAX7326ATG+T | 功能描述:接口-I/O扩展器 I2C Port Expander w/12 P-P Out & 4 In RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| MAX7326ATG-T | 功能描述:接口-I/O扩展器 RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| MAX7326EVCMAXQU+ | 功能描述:界面开发工具 MAX7326 Max7526 Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| MAX7326EVKIT+ | 功能描述:界面开发工具 MAX7326 Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
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