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MAX4562 Datasheet(PDF) 10 Page - Maxim Integrated Products |
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MAX4562 Datasheet(HTML) 10 Page - Maxim Integrated Products |
10 / 16 page Serially Controlled, Clickless Audio/Video Switches 10 ______________________________________________________________________________________ Detailed Description The MAX4562/MAX4563 are serial-interface controlled switches with soft-mode “clickless” and hard-mode oper- ating capability. The MAX4562/MAX4563 contain two SPST switches and two SPDT switches. The SPDT switches are actually 2-to-1 multiplexers, in that each SPDT is really two independent SPST switches with a common node, as shown in the Pin Configuration. Each switch is controlled independently by either the 2-wire I2C-compatible or 3-wire SPI/QSPI/MICROWIRE-compat- ible serial interface. Audio off-isolation and crosstalk is -85dB at 20kHz. Video off-isolation and crosstalk is at least -55dB at 10MHz. Each switch of either device may be set to operate in either soft or hard mode. In soft mode, the switching transition is slowed to avoid the audible “clicking” that can occur when switches are used to route audio sig- nals. In hard mode, the switches are not slowed down, making this mode useful when a faster response is required. If a new command is issued while any soft- mode switch is transitioning, the switch transition time is decreased so it reaches its final state before the new command is executed. Soft mode and open are the power-up default states for all switches. Switches in the same mode are guaranteed to be break-before-make relative to each other. Break-before-make does not apply between switches operating in different modes. These devices operate from a +2.7V to +5.5V single supply. The MAX4562 features a 2-wire I2C-compatible serial interface, and the MAX4563 features a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. SCL SDA tLOW tHIGH tF tR tHD, STA tHD, DAT tHD, STA tSU, DAT tSU, STA tBUF tSU, STO START CONDITION STOP CONDITION REPEATED START CONDITION START CONDITION 20% 70% 20% 70% 20% 70% 20% 70% 20% 70% 20% 70% 20% 70% 70% 20% 70% 70% 70% Figure 3. 2-Wire Serial-Interface Timing Diagram START CONDITION STOP CONDITION COMMAND BYTE SLAVE ADDRESS BYTE SCL SDA MSB MSB LSB LSB ACK ACK Figure 4. A Complete 2-Wire Serial-Interface Transmission |
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