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 supplies 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 max on-resistance, 7 on-resistance matching between channels, 5 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.
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·Set-Top Boxes·PC Multimedia Boards·Video Conferencing Systems·High-End Audio Systems·Security Systems
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` Selectable Soft-Switching Mode for "Clickless" Audio Operation` 22 Typical On-Resistance (+5V Supply)` 5 Typical On-Resistance Matching Between Channels` 2 Typical On-Resistance Flatness` Audio Performance -85dB Off-Isolation at 20kHz-85dB Crosstalk at 20kHz 0.07% THD with 600 Load` Video Performance -72dB Off-Isolation at 10MHz -55dB Crosstalk at 10MHz` Serial Interface 2-Wire I2C-Compatible (MAX4548) 3-Wire SPI/QSPI/MICROWIRE-Compatible (MAX4549)` Single-Supply Operation from +2.7V to +5.5V
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V+ to GND ................................................................-0.3V to +6V
NO_ _, S_, MID_, BYP, COM_ _, CBIASL,
ABIASL, CBIASH, ABIASH, DOUT to GND
(Note 1)........................................................-0.3V to (V+ + 0.3V)
CS, A0, A1, SDA, SCL, DIN,
SCLK to GND ............................................................-0.3V to +6V
Continuous Current into Any Terminal..............................±20mA
Peak Current, NO_ _, S_, COM_ _
(pulsed at 1ms, 10% duty cycle max) ..............................±40mA
Continuous Power Dissipation (TA = +70°C)
36-Pin SSOP (derate 11.8mW/°C above +70°C) ...........941mW
Operating Temperature Range ..........................-40°C to+85°C
Storage Temperature Range ...........................-65°C to+150°C
Lead Temperature (soldering, 10sec) ........................... +300°C
Note 1: Signals on NO_ _, S_, or COM_ _ exceeding V+ or GND are clamped by internal diodes. Limit forward diode current to maximum rating.
Post a Buying Lead
Required Field 
