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MIC74YQS PDF预览

MIC74YQS

更新时间: 2024-02-13 04:09:22
品牌 Logo 应用领域
麦瑞 - MICREL 风扇外围集成电路光电二极管控制器
页数 文件大小 规格书
18页 256K
描述
2-Wire Serial I/O Expander and Fan Controller

MIC74YQS 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Transferred零件包装代码:SOIC
包装说明:SSOP,针数:16
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.37
JESD-30 代码:R-PDSO-G16JESD-609代码:e3
长度:4.9 mm湿度敏感等级:1
I/O 线路数量:8端口数量:1
端子数量:16最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装代码:SSOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, SHRINK PITCH峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1.75 mm
最大供电电压:3.6 V最小供电电压:2.7 V
标称供电电压:3.3 V表面贴装:YES
技术:CMOS温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:0.635 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:3.9116 mm
uPs/uCs/外围集成电路类型:PARALLEL IO PORT, GENERAL PURPOSEBase Number Matches:1

MIC74YQS 数据手册

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MIC74  
2-Wire Serial I/O Expander  
and Fan Controller  
General Description  
Features  
The MIC74 is a fully programmable serial-to-parallel I/O  
expander compatible with the SMBus™ (system manage-  
ment bus) protocol. It acts as a “slave” on the bus,  
providing eight independent I/O lines.  
Provides eight bits of general purpose I/O  
Built in fan speed control logic (optional)  
2-wire SMBus™/I2C™ compatible serial interface plus  
interrupt output  
Each I/O bit can be individually programmed as an input or  
output. If programmed as an output; each I/O bit can be  
programmed as an open-drain or complementary push-pull  
output. If desired, the four most significant I/O bits can be  
programmed to implement fan speed control. An internal  
clock generator and state machine eliminate the overhead  
generally associated with “bit-banging” fan speed control.  
2.7V to 3.6V operating voltage range  
5V-tolerant I/O  
Low quiescent current: 2µA (typical)  
Bit-programmable I/O options:  
– input or output  
– push-pull or open-drain output  
– interrupt on input changes  
Programming the device and reading/writing the I/O bits is  
accomplished using seven internal registers. All registers  
can be read by the host. Output bits are capable of directly  
driving high-current loads such as LEDs. A separate  
interrupt output can notify the host of state changes on the  
input bits without requiring the MIC74 to perform a  
transaction on the serial bus or be polled by the host.  
Three address selection inputs are provided, allowing up  
to eight devices to share the same bus and provide a total  
of 64 bits of I/O.  
Outputs can directly drive LEDs (10mA IOL)  
Up to 8 devices per bus  
Applications  
General purpose I/O expansion via serial bus  
Personal computer system management  
Distributed sensing and control  
Microcontroller I/O expansion  
Fan Control  
The MIC74 is available in an ultra-small-footprint 16-pin  
QSOP. Low quiescent current, small footprint, and low  
package height make the MIC74 ideal for portable and  
desktop applications.  
Ordering Information  
Data sheets and support documentation can be found on  
Micrel’s web site at www.micrel.com.  
Part Number  
Temperature  
Range  
Package  
Standard  
Pb-Free  
MIC74BQS  
MIC74YQS  
–40° to +85°C  
16-Pin QSOP  
Typical Application  
3.0V  
3.0V  
MIC74  
LED1  
R1  
R9  
VDD  
/ALERT  
DATA  
CLK  
A0  
P0  
R2  
R3  
R4  
R5  
R6  
R7  
R8  
P1  
P2  
P3  
P4  
P5  
P6  
P7  
ALERT  
DATA  
CLK  
A1  
A2  
GND  
LED8  
Serial-Bus-Controlled LED Annunciator  
SMBus is a trademark of Intel Corporation. I2C is a trademark of Phillips Electronics N.V.  
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
M9999-101006  
October 2006  
1

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