Maxim公司提供机顶盒所用的各种元器件如高速接口,音频和视频滤波器,电源变换和上电顺序,看门狗和重置电路以及时序等解决方案.
下图是机顶盒的方框图:
Audio Amplifier: Single/Dual/Quad, Low-Cost, Single-Supply, Rail-to-Rail Op Amps with Shutdown MAX4400, MAX4401, MAX4402, MAX4403
Audio DAC : Low-Cost Stereo Audio DACs MAX5556, MAX5557, MAX5558, MAX5559
Data Interface±15kV ESD-Protected +2.5V to +5.5V RS-232 Transceivers in UCSP MAX3228E, MAX3229E
Front-Panel Display : 10-Port, Constant-Current LED Drivers and I/O Expanders with PWM Intensity ControlMAX6946, MAX6947
HDTV Filters : Triple-Channel HDTV Filters MAX9500, MAX9501
Memory : 3.3V Single-Piece 8Mb Nonvolatile SRAM DS2065W
Modem: Wide-Input-Range, Synchronizable, PWM SLIC Power Supply AX1856
Power : 3V to 28V Input, Low-Cost, Hysteretic Synchronous Step-Down Controllers MAX8576, MAX8577, MAX8578, MAX8579
Power Splitters and VGA: Broadband Variable-Gain AmplifiersMAX3537, MAX3538
SCART Switch : Audio/Video Switch for Dual SCART Connectors MAX4397
SDTV Filters : Single, Dual, Triple, and Quad Standard-Definition Video Filter Amplifiers with AC-Coupled Input Buffers MAX9586, MAX9587, MAX9588, MAX9589
Selectable Filters: HD/SD Switchable Video Filters and Buffers MAX7454, MAX7455
Supervisor : µP Supervisors with Separate VCC Reset and Manual Reset Outputs
MAX6453, MAX6454, MAX6455, MAX6456
System Clock: Extremely Accurate I2C RTC with Integrated Crystal and SRAM DS3232
Tuner: Complete 3.3V Direct-Conversion Tuner for DVB-S and DVB-S2MAX2112, MAX2120
Upstream Amplifier : Upstream CATV Amplifier MAX3503
Video Amplifier: Low-Cost, 230MHz, Single/Quad Op Amps with Rail-to-Rail Outputs and ±15kV ESD Protection MAX4385E, MAX4386E
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