- 您现在的位置：买卖IC网 > PDF目录180539 > MAX7349AWG (MAXIM INTEGRATED PRODUCTS INC) SPECIALTY MICROPROCESSOR CIRCUIT, PDSO24 PDF资料下载
参数资料
| 型号： | MAX7349AWG |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PDSO24 |
| 封装： | 0.300 INCH, MS-013AD, SOIC-24 |
| 文件页数： | 17/28页 |
| 文件大小： | 760K |
| 代理商： | MAX7349AWG |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
MAX7347/MAX7348/MAX7349
2-Wire Interfaced Low-EMI Key Switch and
Sounder Controllers
24
______________________________________________________________________________________
Audio Transducers
The sounder output is designed to drive a standard, low-
cost piezo transducer directly without further buffering.
Piezo transducers appear as a capacitive load of typical-
ly 10nF. If a resistive or inductive sounder is used, such
as a small loudspeaker, fit a coupling capacitor between
the sounder output and the transducer. For example, if a
32
speaker is used, connect the positive side of a 22F
electrolytic capacitor to the sounder output, the negative
side of the capacitor to one end of the speaker, and the
other end of the speaker to GND.
The sounder output can also drive a power amplifier for
higher sound levels. In this case, it is usually desirable
to include a lowpass filter before the speaker to convert
the square-wave tones to something closer to a sinu-
soid. The recommended cutoff frequency of this filter is
around 3kHz. An example circuit is shown in Figure 12,
which uses the uncommitted op amp of the MAX4366
bridge power amplifier to implement a third-order
Chebyshev lowpass filter.
REGULAR KEY-PRESS
EVENT
GHOST-KEY
EVENT
KEY-SWITCH MATRIX
Figure 10. Ghost-Key Phenomenon
KEY-SWITCH MATRIX
EXAMPLES OF VALID THREE-KEY COMBINATIONS
Figure 11. Valid Three-Key Combinations
Chip Information
TRANSISTOR COUNT: 51,987
PROCESS: BiCMOS
21.5k
32.4k
22nF
SOUNDER
OUTPUT
SHUTDOWN
2.61k
68nF
21.5k
220pF
IN-
IN+
SHDN
BIAS
10k
10k
50k
50k
VCC
OUT-
OUT+
0.22
F
16
MAX4366
Figure 12. Third-Order Chebyshev Lowpass Filter and Output Stage
相关PDF资料 |
PDF描述 |
|---|---|
| MAX7356 | 1至8路I²C总线开关/复用器，带有总线闭锁检测、隔离和报警指示 |
| MAX767EAP+T | 5V to 3.3V Output, Synchronous, Step-Down Power Supply Controller |
| MAX767REAP+ | 5V to 3.3V Output, Synchronous, Step-Down Power Supply Controller |
| MAX767EAP+ | 5V to 3.3V Output, Synchronous, Step-Down Power Supply Controller |
| MAX767CAP+T | 5V to 3.3V Output, Synchronous, Step-Down Power Supply Controller |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7349EVKIT | 功能描述:接口 - 专用 Evaluation Kit for the MAX7349/Emulates: MAX7347/MAX7348 RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| MAX734C/D | 功能描述:直流/直流开关调节器 +12V 120mA Flash Memory Programming Supply RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX734C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX734CPA | 功能描述:直流/直流开关调节器 12V 120mA Flash Mem Programming Supply RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX734CPA+ | 功能描述:直流/直流开关调节器 12V 120mA Flash Mem Programming Supply RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
发布紧急采购，3分钟左右您将得到回复。