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参数资料
| 型号： | MAX7321ATE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/15页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 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： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（3x3） |
| 包装： | 管件 |
| 包括： | POR |
MAX7321
I2C Port Expander with 8 Open-Drain I/Os
13
Maxim Integrated
Driving LED Loads
When driving LEDs, a resistor must be fitted in series
with the LED to limit the LED current to no more than
20mA. Connect the LED cathode to the MAX7321 port,
and the LED anode to V+ through the series current-
limiting resistor, RLED. Set the port output low to illumi-
nate the LED. Choose the resistor value according to
the following formula:
RLED = (VSUPPLY - VLED - VOL)/ILED
where:
RLED is the resistance of the resistor in series with the
LED (
).
VSUPPLY is the supply voltage used to drive the LED (V).
VLED is the forward voltage of the LED (V).
VOL is the output-low voltage of the MAX7321 when
sinking ILED (V).
ILED is the desired operating current of the LED (A).
For example, to operate a 2.2V red LED at 10mA from a
+5V supply:
RLED = (5 - 2.2 - 0.07)/0.010 = 270.
P0–P7
PULLUP
ENABLE
INPUT
OUTPUT
40k
MAX7321
V+
Figure 9. MAX7321 I/O Structure
I2C
CONTROL
P0
P3
P2
P1
P4
P5
P6
P7
INT
I/O
PORTS
POWER-
ON RESET
INPUT
FILTER
RST
SDA
SCL
AD2
AD0
MAX7321
Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7321ATE+ | 功能描述:接口-I/O扩展器 I2C Port Expander w/8 Open-Drain I/Os 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 |
| MAX7321ATE+T | 功能描述:接口-I/O扩展器 I2C Port Expander w/8 Open-Drain I/Os 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 |
| MAX7321ATE-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 |
| MAX7321AUP | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:I2C Port Expander with 8 Open-Drain I/Os |
| MAX7322 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:I2C Port Expander with 4 Push-Pull Outputs |
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