MAX4548:Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches

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 35Ω max on-resistance, 7Ω on-resistance matching between channels, 5Ω 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 I²-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.

Key Features
  • Selectable Soft-Switching Mode for "Clickless" Audio Operation
  • 22Ω Typical On-Resistance (+5V Supply)
  • 5Ω Typical On-Resistance Matching Between Channels
  • 2Ω Typical On-Resistance Flatness
  • Audio Performance
    • -85dB Off-Isolation at 20kHz
    • -85dB Crosstalk at 20kHz
    • 0.07% THD with 600Ω 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
MAX4548, MAX4549: Pin Configuration
MAX4548, MAX4549: Pin Configuration
Applications/Uses
  • High-End Audio Systems
  • PC Multimedia Boards
  • Security Systems
  • Set-Top Boxes
  • Video Conferencing Systems
DataSheet
titleDownload file
MAX4548-MAX4549 Data SheetMAX4548-MAX4549.pdf
Parametrics
Part NumberFunctionsConfig.RON
(Ω)
InterfaceILEAK(OFF)
(nA)
tON
(ns)
Off Iso.
(dB)
Crosstalk
(dB)
VSUPPLY
(V)
Package/PinsBudgetary
Price
maxmaxmin@ Freq.@ Freq.See Notes
MAX4548Crosspoint3 x 3-to-2352-Wire
Serial
10400-72@10MHz
-85@20kHz
-55@10MHz
-85@20kHz
2.7 to 5.5SSOP/36$5.93 @1k
MAX45493-Wire
Serial
SSOP/36$5.72 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4548EAXNo Longer AvailableSSOP,;36 pin;163.4 mm²-40°C to +85°CNo
MAX4548EAX+ActiveSSOP,;36 pin;163.4 mm²-40°C to +85°CLead Free
MAX4548EAX+TActiveSSOP,;36 pin;163.4 mm²-40°C to +85°CLead Free
MAX4548EAX-TNo Longer AvailableMAX4548EAX+TSSOP;36 pin-40°C to +85°CSee data sheet
MAX4548-MAX4549.pdf MAX4549
MAX4548-MAX4549.pdf MAX4549