MAX4548/MAX4549 19-1496 Rev 0 6/99 Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches General Description Features The MAX4548/MAX4549 serial-interface, programmable, Selectable Soft-Switching Mode for Clickless triple 3x2 audio/video crosspoint switches are ideal for Audio Operation multimedia applications. The devices include three 22 Typical On-Resistance (+5V Supply) crosspoint switch matrices, each containing three inputs 5 Typical On-Resistance Matching Between and two outputs. To improve off-isolation, each switch matrix has a shunt input and each output is selectively Channels programmable for clickless or regular-mode operation. A 2 Typical On-Resistance Flatness selectable set of internal resistive voltage dividers sup- Audio Performance plies DC bias for each output when using AC-coupled -85dB Off-Isolation at 20kHz inputs. To improve crosstalk, the voltage dividers include -85dB Crosstalk at 20kHz four externally accessible bypass points. 0.07% THD with 600 Load The MAX4548/MAX4549 feature 35 max on-resis- tance, 7 on-resistance matching between channels, Video Performance 5 on-resistance flatness, and 0.07% total harmonic -72dB Off-Isolation at 10MHz distortion (THD). Additionally, they feature off-isolation -55dB Crosstalk at 10MHz of -85dB at 20kHz and -72dB at 10MHz, with crosstalk Serial Interface of -85dB at 20kHz and -55dB at 10MHz. The MAX4548 2 2-Wire I C-Compatible (MAX4548) 2 uses a 2-wire I C-compatible serial interface, while 3-Wire SPI/QSPI/MICROWIRE-Compatible the MAX4549 uses a 3-wire SPI/QSPI/MICROWIRE- (MAX4549) compatible serial interface. These parts are available in 36-pin SSOP packages and are specified for the Single-Supply Operation from +2.7V to +5.5V extended (-40C to +85C) operating range. Pin Configuration Applications TOP VIEW Set-Top Boxes NO1C 1 36 CBIASL PC Multimedia Boards CBIASH 2 35 COM1C Video Conferencing Systems NO2C 3 34 MID5 High-End Audio Systems SC 4 33 COM2C Security Systems NO3C 5 32 GND MAX4548 V+ 6 31 COM1A MAX4549 Ordering Information NO1A 7 30 MID1 PART TEMP. RANGE PIN-PACKAGE N01B 8 29 COM1B MAX4548EAX -40C to +85C 36 SSOP SA 9 28 MID2 MAX4549EAX -40C to +85C 36 SSOP NO2A 10 27 COM2A N02B 11 26 MID3 SB 12 COM2B 25 N03A 13 24 MID4 N03B 14 23 ABIASH Functional Diagram appears at end of data sheet. GND 15 22 ABIASL GND 16 21 V+ SDA (DIN) 17 20 A0 (CS) SPI and QSPI are trademarks of Motorola, Inc. SCL (SCLK) 18 19 A1 (DOUT) MICROWIRE is a trademark of National Semiconductor Corp. 2 I C is a trademark of Philips Corp. ( ) ARE FOR MAX4549 SSOP Maxim Integrated Products 1 For free samples & the latest literature: Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches ABSOLUTE MAXIMUM RATINGS V+ to GND................................................................-0.3V to +6V Peak Current, NO , S , COM NO , S , MID , BYP, COM , CBIASL, (pulsed at 1ms, 10% duty cycle max)...........................40mA ABIASL, CBIASH, ABIASH, DOUT to GND Continuous Power Dissipation (T = +70C) A (Note 1)......................................................-0.3V to (V+ + 0.3V) 36-Pin SSOP (derate 11.8mW/C above +70C) ..........941mW Operating Temperature Range ............................-40C to+85C CS, A0, A1, SDA, SCL, DIN, Storage Temperature Range ..............................-65C to+150C SCLK to GND ........................................................-0.3V to +6V Lead Temperature (soldering, 10sec) .............................+300C Continuous Current into Any Terminal..............................20mA Note 1: Signals on NO , S , or COM exceeding V+ or GND are clamped by internal diodes. Limit forward diode current to maximum rating. 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. ELECTRICAL CHARACTERISTICSSingle +5V Supply (V+ = +5V 5%, T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Note 2) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ANALOG SWITCHES V , NO Analog Signal Range (Note 3) V , 0V+ V COM V S I = 4mA, COM T = +25C 22 35 A On-Resistance R V or V = 3V, ON NO S T = T to T 45 V+ = 4.75V A MIN MAX COM to NO or S I = 4mA, COM T = +25C 57 A On-Resistance Match R V or V = 3V, ON NO S T = T to T 8 Between Channels (Note 4) V+ = 4.75V A MIN MAX COM to NO or S I = 4mA COM T = +25C 2 5 A On-Resistance Flatness R V+ = 4.75V V FLAT NO T = T to T 7 (Note 5) or V = 1V, 2V, 3V A MIN MAX S V or V = 4.5V, NO S T = +25C -2 0.04 2 A NO or S Off-Leakage I 1V V = 1V, nA NO (OFF) COM Current (Note 6) T = T to T -10 10 4.5V V+ = 5.25V A MIN MAX V or V = 4.5V, NO S T = +25C -2 0.04 2 A COM Off-Leakage I 1V V = 1V, nA COM (OFF) COM Current (Note 6) T = T to T -10 10 4.5V V+ = 5.25V A MIN MAX V or V = 4.5V, NO S T = +25C -2 0.04 2 A COM On-Leakage 1V, or floating I nA COM (ON) Current (Note 6) V = 4.5V, 1V COM T = T to T -10 10 A MIN MAX V+ = 5.25V AUDIO PERFORMANCE f = 1kHz, V IN NO R = 600 0.07 L Total Harmonic Distortion THD+N or V = 1V + % S RMS plus Noise R =10k 0.006 2.5V L DC V = 1V , f = 20kHz, R = 600, NO RMS IN L Off-Isolation (Note 7) V -85 dB ISO(A) S = GND, shunt switch on or off V = 1V , f = 20kHz, NO RMS IN Channel-to-Channel Crosstalk V -85 dB CT(A) R = R = 600 L S 2 MAX4548/MAX4549