MAX4548EAX ,Serially Controlled, Triple 3x2 Audio/Video Crosspoint SwitchesApplicationsTOP VIEWSet-Top BoxesNO1C 1 36 CBIASLPC Multimedia BoardsCBIASH 2 35 COM1CVideo Confere ..
MAX4548EAX ,Serially Controlled, Triple 3x2 Audio/Video Crosspoint SwitchesELECTRICAL CHARACTERISTICS—Single +5V Supply(V+ = +5V ±5%, T = T to T , unless otherwise noted. Typ ..
MAX4549EAX ,Serially Controlled / Triple 3x2 Audio/Video Crosspoint SwitchesApplicationsTOP VIEWSet-Top BoxesNO1C 1 36 CBIASLPC Multimedia BoardsCBIASH 2 35 COM1CVideo Confere ..
MAX454CPD ,CMOS Video Multiplexer/AmplifierELECTRICAL CHARACTERISTICS MAX452/3/4/5
(V + = +5V, V‘ = -w, -2vs Mn S +2V, Output Load Resistor=1 ..
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MAX8640YEXT18+T ,Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC ConvertersFeatures♦ Tiny SC70 and µDFN PackagesThe MAX8640Y/MAX8640Z step-down converters areoptimized for
MAX8640YEXT19+T ,Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Convertersapplications where small size, high effi- ♦ 500mA Guaranteed Output Currentciency, and low output r ..
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MAX4548EAX
Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches
General DescriptionThe 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 35Ωmax on-resis-
tance, 7Ωon-resistance matching between channels,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 -85dBat 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.
ApplicationsSet-Top Boxes
PC Multimedia Boards
Video Conferencing Systems
High-End Audio Systems
Security Systems
FeaturesSelectable Soft-Switching Mode for “Clickless”
Audio Operation22ΩTypical On-Resistance (+5V Supply)5ΩTypical On-Resistance Matching Between
Channels2ΩTypical On-Resistance FlatnessAudio Performance
-85dB Off-Isolation at 20kHz
-85dB Crosstalk at 20kHz
0.07% THD with 600ΩLoadVideo Performance
-72dB Off-Isolation at 10MHz
-55dB Crosstalk at 10MHzSerial Interface
2-Wire I2C-Compatible (MAX4548)
3-Wire SPI/QSPI/MICROWIRE-Compatible
(MAX4549)Single-Supply Operation from +2.7V to +5.5V
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches19-1496; Rev 0; 6/99
Pin Configuration
Ordering InformationSPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.2C is a trademark of Philips Corp.
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Single +5V Supply(V+ = +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
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.
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)(V+ = +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
ELECTRICAL CHARACTERISTICS—Single +3V Supply(V+ = +3V ±10%, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
MAX4548/MAX4549
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)(V+ = +3V ±10%, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
I/O INTERFACE CHARACTERISTICS(V+ = +2.7V to +5.25V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
2-WIRE TIMING CHARACTERISTICS (Figure 3)(V+ = +2.7V to +5.25V, fSCL= 100kHz, TA= TMINto TMAX, unless otherwise noted.)
Typical Operating Characteristics(V+ = +5V, TA = +25°C, unless otherwise noted.)
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
Note 2:The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3:Guaranteed by design. Not subject to production testing.
Note 4:ΔRON= RON(MAX)- RON(MIN).
Note 5:Resistance flatness is defined as the difference between the maximum and minimum on-resistance values, as measured
over the specified analog signal range.
Note 6:Leakage parameters are 100% tested at maximum rated temperature and guaranteed by correlation at TA= +25°C.
Note 7:Off-isolation = 20log (VCOM_ / VNO_ _ ), VCOM_ = output, VNO_ _ = input to off switch.
Note 8:All timing is measured from the clock’s falling edge preceding the ACK signal for 2-wire and from the rising edge of CSfor
3-wire. Turn-off time is defined at the output of the switch for a 0.5V change, tested with a 300Ωload to ground. Turn-on
time is defined at the output of the switch for a 0.5V change and measured with a 5kΩload resistor to GND. All timing is
shown with respect to 20% V+ and 70% V+, unless otherwise noted.
Note 9:Supply current can be as high as 2mA per switch during switch transitions in the clickless mode, corresponding to a 48mA
total supply transient current requirement.
Note 10:Leakage testing is guaranteed by testing with a +5.25V supply.
Note 11:Cb= capacitance of one bus line in pF. Tested with Cb= 400pF.
Note 12:Typical values are for MAX4548 devices.
3-WIRE TIMING CHARACTERISTICS (Figure 5)(V+ = +2.7V to +5.25V, TA= TMINto TMAX, unless otherwise noted.)
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
Typical Operating Characteristics (continued)(V+ = +5V, TA = +25°C, unless otherwise noted.)
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
Typical Operating Characteristics (continued)(V+ = +5V, TA = +25°C, unless otherwise noted.)
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
Pin Description
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
Pin Description (continued)Figure 1. Switching Times
