MAX4550/MAX4570 19-1397 Rev 0 10/98 Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches General Description Features The MAX4550/MAX4570 serial-interface, programma- Selectable Soft Switching Mode for Clickless ble, dual 4x2 audio/video crosspoint switches are ideal Audio Operation for multimedia applications. Each device contains two 43 Typical On-Resistance (5V Supplies) identical crosspoint switch arrays, each with four inputs and two outputs. To improve off-isolation, use the addi- 5 Typical On-Resistance Matching Between tional crosspoint inputs SA and SB as shunts. Each out- Channels put is selectively programmable for clickless or regular mode operation. A set of internal resistive voltage- 4 Typical On-Resistance Flatness dividers supplies DC bias for each output when using 0.014% Total Harmonic Distortion with 1k Load AC-coupled inputs. Additionally, four auxiliary outputs control additional circuitry via the MAX4550/MAX4570s -110dB Off-Isolation at 20kHz 2-wire or 3-wire interface. -78dB Off-Isolation at 4MHz The MAX4550/MAX4570 feature 80 on-resistance, 10 -95dB Crosstalk at 20kHz on-resistance matching between channels, 5 on- -54dB Crosstalk at 4MHz resistance flatness, and 0.014% total harmonic distor- Serial Interface tion. Additionally, they feature off-isolation of at least 2 -110dB in the audio frequency range and -78dB at 2-Wire, Fast-Mode, I C-Compatible (MAX4550) 4MHz, with -95dB crosstalk in the audio frequency 3-Wire, SPI/QSPI/MICROWIRE-Compatible range and -54dB at 4MHz. The MAX4550 uses a 2-wire (MAX4570) 2 I C-compatible serial interface, while the MAX4570 Four Auxiliary Outputs that Extend P Ports uses a 3-wire SPI/QSPI or MICROWIRE-compati- ble serial interface. These parts are available in 28-pin Single-Supply Operation: +2.7V to +5.5V SSOP and wide SO packages and are tested over Dual-Supply Operation: 2.7V to 5.5V either the commercial (0C to +70C) or extended (-40C to +85C) operating temperature range. Pin Configuration Applications TOP VIEW Set-Top Boxes SB 1 28 SA PC Multimedia Boards NO3A 2 27 NO2B High-End Audio Systems NO3B 3 26 NO2A Video Conferencing Systems BIASH 4 25 V- BIASL 5 24 V+ Ordering Information MAX4550 NO4A 6 23 NO1B MAX4570 PART TEMP. RANGE PIN-PACKAGE NO4B 7 22 NO1A MAX4550CAI 0C to +70C 28 SSOP V+ 8 21 GND MAX4550CWI 0C to +70C 28 Wide SO COM2A 9 20 COM1A MAX4550EAI -40C to +85C 28 SSOP Q0 10 19 Q3 MAX4550EWI -40C to +85C 28 Wide SO MAX4570CAI 0C to +70C 28 SSOP COM2B 11 18 COM1B MAX4570CWI 0C to +70C 28 Wide SO Q1 12 17 Q2 MAX4570EAI -40C to +85C 28 SSOP A0 (CS) 13 16 A1 (DOUT) MAX4570EWI -40C to +85C 28 Wide SO SCL (SCLK) 14 15 SDA (DIN) SO/SSOP 2 I C is a trademark of Philips Corp. SPI/QSPI are trademarks of Motorola, Inc. ( ) ARE FOR MAX4570. MICROWIRE is a trademark of National Semiconductor Corp. Functional Diagram appears at end of data sheet. Maxim Integrated Products 1 For free samples & the latest literature: Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches ABSOLUTE MAXIMUM RATINGS V+ to GND............................................................... -0.3V to +6V Continuous Power Dissipation (T = +70C) A V+ to V-................................................................-0.3V to +13.2V 28-Pin SSOP (derate 9.52mW/C above +70C) .........762mW V- to GND .................................................................+0.3V to -6V 28-Pin Wide SO (derate 12.5mW/C above +70C) ...1000mW NO , S , BIAS , COM , Q , A1, DOUT to GND Operating Temperature Ranges (Note 1)...............................................(V- - 0.3V) to (V+ + 0.3V) MAX4550C I/MAX4570C I ...............................-0C to +70C CS, SCLK, DIN, SCL, SDA, A0 to GND....................-0.3V to +6V MAX4550E I/MAX4570E I ..............................-40C to +85C Continuous Current into Any Terminal..............................10mA Storage Temperature Range .............................-65C to +160C Peak Current, NO , S , COM Lead Temperature (soldering, 10sec) .............................+300C (pulsed at 1ms, 10% duty cycle max) ..........................40mA Note 1: Signals on NO , S , or COM exceeding V+ or V- are clamped by internal diodes. Limit forward-diode current to maxi- mum current 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. ANALOG ELECTRICAL CHARACTERISTICSDual Supplies (V+ = +5V 5%, 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 , V- V+ V COM V S I = 4mA, COM T = +25C 43 80 A On-Resistance R V or V = 3.0V, ON NO S T = T to T 100 V+ = 4.75V, V- = -4.75V A MIN MAX COM to NO or S I = 4mA, COM T = +25C 5 10 A On-Resistance Match Between R V or V = 3.0V, ON NO S T = T to T 10 Channels (Note 4) V+ = 4.75V, V- = -4.75V A MIN MAX COM to NO or S I = 4mA COM T = +25C 4 5 A On-Resistance Flatness R V or V = 3.0V, 0 FLAT(ON) NO S T = T to T 8 (Note 5) V+ = 4.75V V- = -4.75V A MIN MAX V or V = 4.5V, NO S T = +25C -1 0.01 1 A NO or S Off-Leakage NO V = 4.5V, nA (OFF) COM + Current (Note 6) T = T to T -10 10 V+ = 5.25V, V- = -5.25V A MIN MAX V or V = 4.5V, NO S T = +25C -5 0.01 5 A COM Off-Leakage Current I V = 4.5V, nA COM (OFF) COM + (Note 6) T = T to T -10 10 V+ = 5.25V, V- = -5.25V A MIN MAX V or V = floating, NO S T = +25C -5 0.01 5 A COM On-Leakage Current I V = 4.5V, nA COM (ON) COM (Note 6) T = T to T -20 20 V+ = 5.25V, V- = -5.25V A MIN MAX AUDIO PERFORMANCE Total Harmonic Distortion plus f = 1kHz, R = 1k, V or V = 1V , IN L NO S RMS THD+N 0.014 % V or V = 0 Noise NO S Shunt switch on -110 V = 1V , f = 20kHz, NO RMS IN Off-Isolation (Note 7) V dB ISO(A) R = 10k, S = GND L Shunt switch off -80 Channel-to-Channel Crosstalk V ICOM = 1mA CTA(A) V or V = 1V , f = 20kHz, NO S RMS IN Channel-to-Channel Crosstalk V -95 dB CTA(A) R = 10k, three channels driven at 20kHz L 2 MAX4550/MAX4570