MAX4744/MAX4744H/MAX4745/MAX4745H/MAX4746H 19-0563 Rev 1 11/06 Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability General Description Features The MAX4744/MAX4744H/MAX4745/MAX4745H/ Distortion-Free Negative Signal Throughput Down MAX4746H dual SPDT (single-pole/double-throw) audio to V - 5.5V CC switches feature negative signal capability that allows Internal Shunt Resistor Reduces Click/Pop signals as low as V - 5.5V to pass through without CC (MAX4744/MAX4744H) distortion. These analog switches have a low on-resis- tance and low supply current, and operate from a single 0.6 (typ) Low On-Resistance +1.8V to +5.5V supply. 0.1 (max) Channel-to-Channel Matching The MAX4744/MAX4744H have internal shunt resistors that automatically discharge the capacitance at the nor- 0.55 (max) On-Resistance Flatness mally open (NO) and normally closed (NC) terminals +1.8V to +5.5V Single-Supply Voltage when they are not connected. The MAX4746H features internal shunt resistors on NC terminals. This reduces 0.01% (typ) Total Harmonic Distortion click-and-pop sounds that occur when switching audio -75dB (typ) Crosstalk (100kHz) signals between precharged points. A break-before- -68dB (typ) Off-Isolation (100kHz) make feature further reduces popping. The MAX4744/ MAX4745 control the switches with two control bits CB1 Available in 10-Pin DFN Package (2mm x 2mm) and CB2. The MAX4744H/MAX4745H/MAX4746H have one control bit to switch both switches and an enable input EN to put the switches in a high-impedance mode. The MAX4744H/MAX4745H/MAX4746H also have an Pin Configurations internal protection network against voltages applied to COM when V = 0V. CC TOP VIEW These devices are available in a space-saving 10-pin COM1 NC1 V NC2 COM2 COM1 NC1 V NC2 COM2 CC CC DFN (2mm x 2mm) package and operate over the 10 9 8 76 10 9 8 76 -40C to +85C extended temperature range. Applications MAX4744H Speaker Switching MAX4744 MAX4745H MAX4745 Power Routing MAX4746H + + Cellular Phones 12 3 45 12 3 45 MP3 Players CB1 NO1 GND NO2 CB2 EN NO1 GND NO2 CB0 PDAs and Other Handheld Devices DFN DFN (2mm x 2mm) (2mm x 2mm) Notebook Computers Ordering Information/Selector Guide PIN- TOP PART CLICKLESS COM PROTECTION PKG CODE PACKAGE MARK MAX4744ELB+T 10 DFN-10 +AAF Yes No L1022-1 MAX4744HELB+T 10 DFN-10 +AAG Yes Yes L1022-1 MAX4745ELB+T 10 DFN-10 +AAH No No L1022-1 MAX4745HELB+T 10 DFN-10 +AAI No Yes L1022-1 MAX4746HELB+T 10 DFN-10 +AAM Yes, on NC Yes L1022-1 Note: All devices are specified over the -40C to +85C operating temperature range. +Denotes a lead-free package. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Peak Current NO , NC , COM (pulsed at 1ms, 10% V , CB , EN ........................................................-0.3V to +6.0V duty cycle)...................................................................500mA CC NC , NO ...........................................(V - 6V) to (V + 0.3V) ESD Protection per Method 3015.7 CC CC COM (MAX4744/MAX4745).............(V - 6V) to (V + 0.3V) NO , NC , COM , V , GND, CB , EN...............................2kV CC CC CC COM (MAX4744H/MAX4745H/MAX4746H) ..................(Note 1) Continuous Power Dissipation (T = +70C) A Continuous Current NO , NC , COM .........................300mA 10-Pin DFN (derate 5mW/C above +70C) ...............403mW Peak Current NO , NC , COM (pulsed at 1ms, 50% Operating Temperature Range ...........................-40C to +85C duty cycle)...................................................................400mA Storage Temperature Range .............................-65C to +150C Note 1: If V > 0.5V, limits are (V - 6V) to (V + 0.3V). If V < 0.5V, limits are (V - 6.0V) to +6.0V. CC CC CC CC CC 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 CHARACTERISTICS (V = +2.7V to +5.5V, T = -40C to +85C, unless otherwise noted. Typical values are at V = 3.3V, T = +25C.) (Note 2) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply-Voltage Range V 1.8 5.5 V CC V = 5.5V, V = 0V or V 0.3 1 CC CB CC Supply Current I A CC V = 5.5V, V = 0.5V or 1.4V 8 CC CB V = 2.7V, V = 0.5V or 1.4V 4 CC CB ANALOG SWITCH V , NC V CC Analog Signal Range V , (Note 3) V V NO CC - 5.5V V COM T = +25C 0.6 0.95 A V = +2.7V V or V CC NC NO On-Resistance (Note 4) R = V - 5.5V, -1V, 0V, 1V, ON CC T = T to A MIN 1.0 2V, V I = 100mA CC COM T MAX T = +25C 0.1 A On-Resistance Match Between V = 2.7V , V or V = C C N C N O R ON T = T to A MIN Channels (Notes 4 and 5) 0V , I = 100mA C OM 0.1 T MAX T = +25C 0.55 A V = + 2.7V, V or V = C C N C N O On-Resistance Flatness (Note 6) R FLAT V - 5.5V, - 1V , 0V , 1V , 2V , C C T = T to A MIN 0.6 V I = 100mA C C C OM T MAX MAX4744/MAX4744H/MAX4746H only, Shunt Switch Resistance R 25k SH V = 2.7V CC T = +25C -15 +15 A V = + 2.7V swi tch open C C NC , NO Off-Leakage Current I V or V = - 2.5V, + 2.5V NO (OFF), N C N O nA T = T to A MIN (Note 3) I ( M AX47 45/M AX47 45H only) NC (OFF) -50 +50 T MAX ( M AX47 46H - I ( ) only) N O OFF T = +25C -15 +15 A V = 2.7V swi tch clos ed C C COM On-Leakage Current I V or V = - 2.5V, + 2.5V nA COM (ON) N C N O T = T to A MIN (Note 3) -100 +100 V = - 2.5V, + 2.5V C OM T MAX 2 MAX4744/MAX4744H/MAX4745/MAX4745H/MAX4746H