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MAX4548 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX4548 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 20 page For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. General Description The MAX4548/MAX4549 serial-interface, programmable, triple 3x2 audio/video crosspoint switches are ideal for multimedia applications. The devices include three crosspoint switch matrices, each containing three inputs and two outputs. To improve off-isolation, each switch matrix has a shunt input and each output is selectively programmable for clickless or regular-mode operation. A selectable set of internal resistive voltage dividers sup- plies DC bias for each output when using AC-coupled inputs. To improve crosstalk, the voltage dividers include four externally accessible bypass points. The MAX4548/MAX4549 feature 35 Ω max on-resis- tance, 7 Ω on-resistance matching between channels, 5 Ω on-resistance flatness, and 0.07% total harmonic distortion (THD). Additionally, they feature off-isolation of -85dB at 20kHz and -72dB at 10MHz, with crosstalk of -85dB at 20kHz and -55dB at 10MHz. The MAX4548 uses a 2-wire I2C™-compatible serial interface, while the MAX4549 uses a 3-wire SPI™/QSPI™/MICROWIRE™- compatible serial interface. These parts are available in 36-pin SSOP packages and are specified for the extended (-40°C to +85°C) operating range. Applications Set-Top Boxes PC Multimedia Boards Video Conferencing Systems High-End Audio Systems Security Systems Features o Selectable Soft-Switching Mode for “Clickless” Audio Operation o 22 Ω Typical On-Resistance (+5V Supply) o 5 Ω Typical On-Resistance Matching Between Channels o 2 Ω Typical On-Resistance Flatness o Audio Performance -85dB Off-Isolation at 20kHz -85dB Crosstalk at 20kHz 0.07% THD with 600 Ω Load o Video Performance -72dB Off-Isolation at 10MHz -55dB Crosstalk at 10MHz o Serial Interface 2-Wire I2C-Compatible (MAX4548) 3-Wire SPI/QSPI/MICROWIRE-Compatible (MAX4549) o Single-Supply Operation from +2.7V to +5.5V Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches ________________________________________________________________ Maxim Integrated Products 1 36 35 34 33 32 31 30 29 28 27 26 25 24 23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 CBIASL COM1C MID5 COM2C GND COM1A ABIASH MID1 COM1B MID2 COM2A MID3 COM2B MID4 N03B N03A SB N02B NO2A SA N01B NO1A V+ NO3C SC NO2C CBIASH NO1C SSOP TOP VIEW MAX4548 MAX4549 22 21 20 19 15 16 17 18 A1 (DOUT) ( ) ARE FOR MAX4549 ABIASL V+ A0 (CS) SCL (SCLK) SDA (DIN) GND GND 19-1496; Rev 0; 6/99 PART MAX4548EAX MAX4549EAX -40°C to +85°C -40°C to +85°C TEMP. RANGE PIN-PACKAGE 36 SSOP 36 SSOP Pin Configuration Ordering Information Functional Diagram appears at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. I2C is a trademark of Philips Corp. |
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