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参数资料
| 型号： | MAX7324ATG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 24TQFN-EP |
| 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： | 8 |
| 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 |
MAX7324
I2C Port Expander with Eight Push-Pull Outputs
and Eight Inputs
______________________________________________________________________________________
13
When the master reads 2 bytes from the output ports of
the MAX7324 and subsequently issues a STOP condi-
tion (Figure 7), the MAX7324 transmits the current port
data, followed by the transition flags. The transition
flags are then cleared, and transition detection is reset.
INT deasserts during the slave acknowledge. The new
snapshot data is the current port data transmitted to the
master, and therefore, port transitions occuring during
the transmission are detected. INT remains high until
the STOP condition. When the master reads more than
2 data bytes, the input port data alternates with the
transition flag.
A read from the output ports of the MAX7324 starts with
the master transmitting the ports’ slave address with
the R/W bit set high. The MAX7324 acknowledges the
slave address and samples the logic state of the output
ports during the acknowledge bit. The master can read
one or more bytes from the output ports of the
MAX7324, and then issues a STOP condition (Figure 8).
The MAX7324 transmits the current port data, read
back from the actual port outputs (not the port output
latches) during the acknowledge. If a port is forced to a
logic state other than its programmed state, the read-
back reflects this. If driving a capacitive load, the read-
back port level verification algorithms may need to take
the RC rise/fall time into account.
Typically, the master reads one byte from the ouput
ports of the MAX7324, then issues a STOP condition
(Figure 8). However, the master can read two or more
bytes from the output ports of the MAX7324, and then
issues a STOP condition. In this case, the MAX7324
resamples the port outputs during each acknowledge
and transmits the new data each time.
SCL
MAX7324 SLAVE ADDRESS
SA
P
1
PORTS
ACKNOWLEDGE
FROM MAX7324
ACKNOWLEDGE
FROM MASTER
PORT SNAPSHOT
tIV
tPH
tIR
A
I0
I1
I2
I3
I4
I5
I6
I7
D0
D1
D2
D3
D4
D5
D6
D7
PORT SNAPSHOT
tPS
tIP
F0
F1
F2
F3
F4
F5
F6
F7
D7
D6
D5
D4
D3
D2
D1
D0
A
PORT SNAPSHOT
FLAG
INT OUTPUT
R/W
S = START CONDITION
A = ACKNOWLEDGE
P = STOP CONDITION
INT REMAINS HIGH UNTIL STOP CONDITION
Figure 7. Reading Input Ports of the MAX7324 (2 Data Bytes)
SCL
MAX7324 SLAVE ADDRESS
SA
P
1
ACKNOWLEDGE FROM MAX7324
PORT SNAPSHOT DATA
PORT SNAPSHOT TAKEN
A
P0
P1
P2
P3
DATA 1
P4
P5
P6
P7
D0
D1
D2
D3
D4
D5
D6
D7
PORT SNAPSHOT TAKEN
ACKNOWLEDGE
FROM MASTER
R/W
Figure 8. Reading Output Ports of the MAX7324
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7324ATG+ | 功能描述:接口-I/O扩展器 I2C Port Expander w/8 P-P Out & 8 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 |
| MAX7324ATG+T | 功能描述:接口-I/O扩展器 I2C Port Expander w/8 P-P Out & 8 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 |
| MAX7324ATG-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 |
| MAX7324EVCMAXQU+ | 功能描述:界面开发工具 Maxim Evaluation System 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 |
| MAX7324EVKIT+ | 功能描述:界面开发工具 Evaluation Kit/Evaluation System for the MAX7324 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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