MAX349CWN+T

19-0451; Rev 1; 10/98 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers The MAX349/MAX350 are 8-channel and dual 4-channel serially controlled multiplexers (muxes). These muxes conduct equally well in either direction. On-resistance (100Ω max) is matched between switches to 16Ω max and is flat (10Ω max) over the specified signal range. These CMOS devices can operate continuously with dual power supplies ranging from ±2.7V to ±8V or a single supply between +2.7V and +16V. Each mux can handle rail-to-rail analog signals. The off-leakage current is only 0.1nA at +25°C or 5nA at +85°C. Upon power-up, all switches are off and the internal shift registers are reset to zero. The serial interface is compatible with SPI™/QSPI™ and MICROWIRE™. Functioning as a shift register, it allows data (at DIN) to be clocked in synchronously with the rising edge of clock (SCLK). The shift register’s output (DOUT) enables several MAX349s or MAX350s to be daisy chained. All digital inputs have 0.8V or 2.4V logic thresholds, ensuring both TTL and CMOS-logic compatibility when using ±5V supplies or a single +5V supply. ________________________Applications Serial Data-Acquisition Systems Avionics Audio Signal Routing Industrial and ProcessControl Systems ATE Equipment Networking ____________________________Features ♦ SPI/QSPI, MICROWIRE-Compatible Serial Interface ♦ 8 Separately Controlled SPST Switches ♦ Single 8-to-1 Mux (MAX349) Dual 4-to-1 Mux (MAX350) ♦ 100Ω Signal Paths with ±5V Supplies ♦ Rail-to-Rail® Signal Handling ♦ Asynchronous RESET Input ♦ ±2.7V to ±8V Dual Supplies +2.7V to +16V Single Supply ♦ >2kV ESD Protection per Method 3015.7 ♦ TTL/CMOS-Compatible Inputs (with +5V or ±5V Supplies) Ordering Information PART TEMP. RANGE PIN-PACKAGE MAX349CPN 0°C to +70°C 18 Plastic DIP MAX349CWN MAX349CAP MAX349C/D 0°C to +70°C 0°C to +70°C 0°C to +70°C 18 Wide SO 20 SSOP Dice* Ordering Information continued at end of data sheet. *Contact factory for dice specifications. Pin Configurations/Functional Diagrams TOP VIEW SCLK 1 MAX349 V+ 2 DIN 3 18 CS 17 RESET LOGIC 16 DOUT SCLK 1 MAX350 V+ 2 DIN 3 18 CS 17 RESET LOGIC 16 DOUT GND 4 15 V- COM 5 14 N.C. COMA 5 14 COMB NO0 6 13 NO7 NO0A 6 13 NO0B NO1 7 12 NO6 NO1A 7 12 NO1B NO2 8 11 NO5 NO2A 8 11 NO2B NO3 9 10 NO4 NO3A 9 10 NO3B N.C. = NOT INTERNALLY CONNECTED DIP/SO GND 4 15 V- DIP/SO Pin Configurations continued at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX349/MAX350 General Description MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers ABSOLUTE MAXIMUM RATINGS Voltages Referenced to GND V+ ...........................................................................-0.3V, +17V V- ............................................................................-17V, +0.3V V+ to V-...................................................................-0.3V, +17V SCLK, CS, DIN, DOUT, RESET .................-0.3V to (V+ + 0.3V) NO, COM .................................................(V- - 2V) to (V+ + 2V) Continuous Current into Any Terminal..............................±30mA Peak Current, NO or COM (pulsed at 1ms, 10% duty cycle).................................±100mA Continuous Power Dissipation (TA = +70°C) 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ..889mW 18-Pin SO (derate 9.52mW/°C above +70°C)...............762mW 20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature Ranges MAX349C_ _, MAX350C_ _ .................................0°C to +70°C MAX349E_ _, MAX350E_ _ ...............................-40°C to +85°C MAX349M_ _, MAX350M_ _ ...........................-55°C to +125°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C 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—Dual Supplies (V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL MIN CONDITIONS TYP (Note 1) MAX V+ V 60 100 Ω UNITS ANALOG SWITCH Analog Signal Range COM-NO On-Resistance COM-NO On-Resistance Match Between Channels (Note 2) COM-NO On-Resistance Flatness (Note 2) VCOM, VNO C, E, M RON TA = +25°C C, E, M 125 ∆RON V+ = 5V, V- = -5V, VCOM = ±3V, INO = 1mA TA = +25°C 16 C, E, M 20 V+ = 5V, V- = -5V, INO = 1mA, VCOM = -3V, 0V, 3V TA = +25°C 10 C, E, M 15 RFLAT(ON) V+ = 5.5V, V- = -5.5V, VCOM = -4.5V, VNO = 4.5V NO Off-Leakage Current (Note 3) INO(OFF) V+ = 5.5V, V- = -5.5V, VCOM = 4.5V, VNO = -4.5V V+ = 5.5V, V- = -5.5V, VCOM = ±4.5V, VNO = ±4.5V COM Off-Leakage Current (Note 3) MAX349 MAX350 ICOM(OFF) V+ = 5.5V, V- = -5.5V, VCOM = -4.5V, VNO = 4.5V 2 V- V+ = 5V, V- = -5V, VCOM = ±3V, INO = 1mA MAX349 MAX350 TA = +25°C C, E -0.1 M -10 TA = +25°C -0.1 C, E -10 TA = +25°C -0.1 C, E -10 M -100 TA = +25°C -0.1 -50 TA = +25°C -0.2 C, E -10 M -100 TA = +25°C -0.2 0.1 10 0.002 0.1 nA 5 10 0.002 0.1 10 100 0.002 -5 M Ω 5 -5 M C, E 0.002 -5 Ω 0.1 5 50 0.002 0.2 10 100 0.002 0.2 C, E -5 5 M -50 50 _______________________________________________________________________________________ nA Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers (V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER COM On-Leakage Current (Note 3) SYMBOL ICOM(ON) MIN CONDITIONS V+ = 5.5V, V- = -5.5V, VCOM = VNO = ±4.5V MAX349 MAX350 TA = +25°C C, E M TA = +25°C C, E M -0.2 -10 -100 -0.2 -5 -50 TYP (Note 1) 0.001 0.02 MAX 0.2 10 100 0.2 5 50 UNITS nA DIGITAL I/O DIN, SCLK, CS, RESET Input Voltage Logic Threshold High VIH C, E, M DIN, SCLK, CS, RESET Input Voltage Logic Threshold Low VIL C, E, M DIN, SCLK, CS, RESET Input Current Logic High or Low IIH, IIL VDIN, VSCLK, V CS = 0.8V or 2.4V DOUT Output Voltage Logic High VDOUT DOUT Output Voltage Logic Low VDOUT SCLK Input Hysteresis SCLKHYST SWITCH DYNAMIC CHARACTERISTICS IDOUT = 0.8mA IDOUT = -1.6mA Turn-On Time tON From rising edge of CS Turn-Off Time tOFF From rising edge of CS Break-Before-Make Delay Charge Injection (Note 4) NO Off-Capacitance COM Off-Capacitance tBBM VCTE From rising edge of CS CL = 1nF, VNO = 0V, RS = 0Ω VNO = GND, f = 1MHz VCOM = GND, f = 1MHz VCOM = VNO = GND, f = 1MHz RL = 50Ω, CL = 15pF, VNO = 1VRMS, f = 100kHz RL = 50Ω, CL = 15pF, VNO = 1VRMS, f = 100kHz CNO(OFF) CCOM(OFF) Switch On-Capacitance C(ON) Off-Isolation VISO Channel-to-Channel Crosstalk VCT POWER SUPPLY Power-Supply Range V+, V- V+ Supply Current I+ DIN = CS = SCLK = 0V or V+, RESET = 0V or V+ V- Supply Current I- DIN = CS = SCLK = 0V or V+, RESET = 0V or V+ 2.4 C, E, M -1 C, E, M C, E, M C, E, M 2.8 0 TA = +25°C C, E, M TA = +25°C C, E, M TA = +25°C TA = +25°C TA = +25°C TA = +25°C V 0.03 0.8 V 1 µA V+ 0.4 V V mV 100 200 90 5 40 1 2 2 275 400 150 300 10 ns ns ns pC pF pF TA = +25°C 8 pF TA = +25°C > 90 dB TA = +25°C < -90 dB C, E, M TA = +25°C C, E, M TA = +25°C C, E, M ±3 7 -1 -2 0.1 ±8 20 30 1 2 V µA µA _______________________________________________________________________________________ 3 MAX349/MAX350 ELECTRICAL CHARACTERISTICS—Dual Supplies (continued) MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers TIMING CHARACTERISTICS—Dual Supplies (Figure 1) (V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SERIAL DIGITAL INTERFACE SCLK Frequency Cycle Time SYMBOL MIN CONDITIONS TYP MAX (Note 1) fSCLK tCH + tCL C, E, M C, E, M 0 480 CS Lead Time tCSS C, E, M 240 ns CS Lag Time SCLK High Time SCLK Low Time Minimum Data Setup Time Data Hold Time tCSH2 C, E, M 240 ns C, E, M C, E, M C, E, M C, E, M TA = +25°C 190 190 ns ns ns ns tCH tCL tDS tDH DIN Data Valid after Falling SCLK (Note 4) tDO 50% of SCLK to 10% of DOUT, CL = 10pF Rise Time of DOUT (Note 4) tDR Allowable Rise Time at DIN, SCLK (Note 4) 0 2.1 UNITS 17 -17 85 100 MHz ns ns C, E, M 400 20% of V+ to 70% of V+, CL = 10pF C, E, M 100 ns tSCR 20% of V+ to 70% of V+, CL = 10pF C, E, M 2 µs Fall Time of DOUT (Note 4) tDF 20% of V+ to 70% of V+, CL = 10pF C, E, M 100 ns Allowable Fall Time at DIN, SCLK (Note 4) tSCF 20% of V+ to 70% of V+, CL = 10pF C, E, M 2 µs RESET Minimum Pulse Width tRW TA = +25°C 70 ns Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 2: ∆RON = RON(max) - RON(min). On-resistance match between channels and on-resistance flatness are guaranteed only with specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp. Note 4: Guaranteed by design. Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies. Note 6: See Figure 6. Off-isolation = 20log10 VCOM/VNO, VCOM = output. NO = input to off switch. Note 7: Between any two switches. See Figure 3. 4 _______________________________________________________________________________________ Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers (V+ = +4.5V to +5.5V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL MIN CONDITIONS TYP (Note 1) MAX V+ V 125 175 Ω UNITS ANALOG SWITCH Analog Signal Range COM-NO On-Resistance VCOM, VNO RON C, E, M V+ = 5V, VCOM = 3.5V, INO = 1mA V+ = 5.5V, VCOM = 4.5V, VNO = 0V NO Off-Leakage Current (Notes 4, 5) INO(OFF) V+ = 5.5V, VCOM = 0V, VNO = 4.5V MAX349 V+ = 5.5V, VCOM = 4.5V, VNO = 0V MAX350 COM Off-Leakage Current (Notes 4, 5) ICOM(OFF) MAX349 V+ = 5.5V, VCOM = 0V, VNO = 4.5V MAX350 MAX349 COM On-Leakage Current (Notes 4, 5) ICOM(ON) V+ = 5.5V, VCOM = VNO = ±4.5V MAX350 V- TA = +25°C C, E, M TA = +25°C C, E 225 -0.1 0.002 -5 M -10 TA = +25°C -0.1 0.1 5 10 0.002 0.1 C, E -5 5 M -10 10 TA = +25°C -0.1 0.002 0.1 C, E -10 10 M -100 100 TA = +25°C -0.1 0.002 0.1 C, E -5 5 M -50 50 TA = +25°C -0.2 0.002 0.2 C, E -10 10 M -100 100 TA = +25°C -0.2 0.002 -5 5 M -50 50 TA = +25°C -0.2 C, E -10 10 M -100 100 TA = +25°C -0.2 0.02 nA 0.2 C, E 0.01 nA 0.2 0.2 C, E -5 5 M -50 50 2.4 nA DIGITAL I/O DIN, SCLK, CS, RESET Input Voltage Logic Threshold High VIH C, E, M DIN, SCLK, CS, RESET Input Voltage Logic Threshold Low VIL C, E, M DIN, SCLK, CS, RESET Input Current Logic High or Low IIH, IIL VDIN, VSCLK, V CS = 0.8V or 2.4V C, E, M -1 DOUT Output Voltage Logic High VDOUT IDOUT = 0.8mA C, E, M DOUT Output Voltage Logic Low VDOUT IDOUT = -1.6mA C, E, M SCLK Input Hysteresis SCLKHYST C, E, M V 0.8 V 1 µA 2.8 V+ V 0 0.4 V 0.03 100 mV POWER SUPPLY V+ Supply Current I+ DIN = CS = SCLK = 0V or V+, TA = +25°C RESET = 0V or V+ C, E, M 7 20 30 µA _______________________________________________________________________________________ 5 MAX349/MAX350 ELECTRICAL CHARACTERISTICS—Single +5V Supply MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued) (V+ = +4.5V to +5.5V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL MIN TYP (Note 1) MAX TA = +25°C C, E, M TA = +25°C C, E, M TA = +25°C TA = +25°C 160 400 500 200 300 TA = +25°C > 90 dB TA = +25°C < -90 dB CONDITIONS UNITS SWITCH DYNAMIC CHARACTERISTICS Turn-On Time tON From rising edge of CS Turn-Off Time tOFF From rising edge of CS Break-Before-Make Delay Charge Injection (Note 4) tBBM VCTE Off-Isolation (Note 6) VISO Channel-to-Channel Crosstalk (Note 7) VCT From rising edge of CS CL = 1nF, VNO = 0V, RS = 0Ω RL = 50Ω, CL = 15pF, VNO = 1VRMS, f = 100kHz RL = 50Ω, CL = 15pF, VNO = 1VRMS, f = 100kHz 6 60 15 1 _______________________________________________________________________________________ 10 ns ns ns pC Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers (V+ = +4.5V to +5.5V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SERIAL DIGITAL INTERFACE SCLK Frequency SYMBOL MIN CONDITIONS TYP (Note 1) MAX fSCLK C, E, M 0 tCH + tCL C, E, M 480 ns CS Lead Time (Note 4) tCSS C, E, M 240 ns CS Lag Time (Note 4) tCSH2 C, E, M 240 ns SCLK High Time (Note 4) SCLK Low Time (Note 4) tCH tCL C, E, M C, E, M 190 190 ns ns Minimum Data Setup Time (Note 4) tDS C, E, M 17 Data Hold Time (Note 4) tDH DIN Data Valid after Falling SCLK (Note 4) tDO 50% of SCLK to 10% of DOUT, CL = 10pF C, E, M TA = +25°C C, E, M -17 85 Rise Time of DOUT (Note 4) tDR 20% of V+ to 70% of V+, CL = 10pF C, E, M 100 ns Allowable Rise Time at DIN, SCLK (Note 4) tSCR 20% of V+ to 70% of V+, CL = 10pF C, E, M 2 µs Fall Time of DOUT (Note 4) tDF 20% of V+ to 70% of V+, CL = 10pF C, E, M 100 ns Allowable Fall Time at DIN, SCLK (Note 4) tSCF 20% of V+ to 70% of V+, CL = 10pF C, E, M 2 µs RESET Minimum Pulse Width tRW Cycle Time (Note 4) TA = +25°C 2.1 UNITS 100 ns ns 400 70 MHz ns ns Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 2: ∆RON = RON(max) - RON(min). On-resistance match between channels and on-resistance flatness are guaranteed only with specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp. Note 4: Guaranteed by design. Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies. Note 6: See Figure 6. Off-isolation = 20log10 VCOM/VNO, VCOM = output. NO = input to off switch. Note 7: Between any two switches. See Figure 3. _______________________________________________________________________________________ 7 MAX349/MAX350 TIMING CHARACTERISTICS—Single +5V Supply (Figure 1) MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers ELECTRICAL CHARACTERISTICS—Single +3V Supply (V+ = +3.0V to +3.6V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL MIN CONDITIONS TYP (Note 1) MAX UNITS ANALOG SWITCH Analog Signal Range COM-NO On-Resistance VCOM, VNO RON C, E, M V+ = 3.0V, VCOM = 1.5V, INO = 1mA MAX349 V+ = 3.6V, VCOM = 3V, VNO = 0V MAX350 COM Off-Leakage Current (Notes 4, 5) ICOM(OFF) MAX349 V+ = 3.6V, VCOM = 0V, VNO = 3V MAX350 MAX349 COM On-Leakage Current (Notes 4, 5) ICOM(ON) V+ = 3.6V, VCOM = VNO = 3V MAX350 V- TA = +25°C 270 C, E, M V+ V 500 Ω 600 TA = +25°C -0.1 C, E -10 0.002 10 M -100 100 TA = +25°C -0.1 0.002 0.1 0.1 C, E -5 5 M -50 50 TA = +25°C -0.2 0.002 0.2 C, E -10 10 M -100 100 TA = +25°C -0.2 0.002 0.2 C, E -5 5 M -50 50 TA = +25°C -0.2 C, E -10 M -100 TA = +25°C -0.2 0.01 nA 0.2 10 100 0.02 0.2 C, E -5 5 M -50 50 2.4 nA DIGITAL I/O DIN, SCLK, CS, RESET Input Voltage Logic Threshold High VIH C, E DIN, SCLK, CS, RESET Input Voltage Logic Threshold Low VIL C, E DIN, SCLK, CS, RESET Input Current Logic High or Low IIH, IIL VDIN, VSCLK, V CS = 0.8V or 2.4V C, E -1 DOUT Output Voltage Logic High VDOUT IDOUT = 0.1mA C, E, M DOUT Output Voltage Logic Low VDOUT IDOUT = -1.6mA C, E, M SCLK Input Hysteresis SCLKHYST C, E, M V 0.8 V 1 µA 2.8 V+ V 0 0.4 0.03 100 V mV POWER SUPPLY V+ Supply Current 8 I+ DIN = CS = SCLK = 0V or V+, TA = +25°C RESET = 0V or 5V C, E, M 6 _______________________________________________________________________________________ 20 30 V µA ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued) (V+ = +3.0V to +3.6V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL MIN CONDITIONS TYP (Note 1) MAX 275 600 700 300 400 UNITS SWITCH DYNAMIC CHARACTERISTICS Turn-On Time (Note 4) tON From rising edge of CS Turn-Off Time (Note 4) tOFF From rising edge of CS Break-Before-Make Delay (Note 4) Charge Injection (Note 4) tBBM VCTE Off-Isolation (Note 6) VISO Channel-to-Channel Crosstalk (Note 7) VCT From rising edge of CS CL = 1nF, VNO = 0V, RS = 0Ω RL = 50Ω, CL = 15pF, VNO = 1VRMS, f = 100kHz RL = 50Ω, CL = 15pF, VNO = 1VRMS, f = 100kHz TA = +25°C C, E, M TA = +25°C C, E, M TA = +25°C TA = +25°C 120 5 15 1 10 ns ns ns pC TA = +25°C > 90 dB TA = +25°C < –90 dB _______________________________________________________________________________________ 9 MAX349/MAX350 MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers TIMING CHARACTERISTICS—Single +3V Supply (Figure 1) (V+ = +3.0V to +3.6V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SERIAL DIGITAL INTERFACE SCLK Frequency Cycle Time (Note 4) SYMBOL MIN CONDITIONS fSCLK C, E, M 0 TYP (Note 1) MAX 2.1 UNITS MHz tCH + tCL C, E, M 480 ns CS Lead Time (Note 4) tCSS C, E, M 240 ns CS Lag Time (Note 4) tCSH2 C, E, M 240 ns SCLK High Time (Note 4) SCLK Low Time (Note 4) tCH tCL C, E, M C, E, M 190 190 ns ns Minimum Data Setup Time (Note 4) tDS C, E, M 38 Data Hold Time (Note 4) tDH C, E, M TA = +25°C C, E, M -38 150 120 ns ns DIN Data Valid after Falling SCLK (Note 4) tDO 50% of SCLK to 10% of DOUT, CL = 10pF Rise Time of DOUT (Note 4) tDR 20% of V+ to 70% of V+, CL = 10pF C, E, M 100 ns Allowable Rise Time at DIN, SCLK (Note 4) tSCR 20% of V+ to 70% of V+, CL = 10pF C, E, M 2 µs Fall Time of DOUT (Note 4) tDF 20% of V+ to 70% of V+, CL = 10pF C, E, M 100 ns Allowable Fall Time at DIN, SCLK (Note 4) tSCF 20% of V+ to 70% of V+, CL = 10pF C, E, M 2 µs RESET Minimum Pulse Width (Note 4) tRW TA = +25°C 400 105 ns ns Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 2: ∆RON = RON(max) - RON(min). On-resistance match between channels and on-resistance flatness are guaranteed only with specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp. Note 4: Guaranteed by design. Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies. Note 6: See Figure 6. Off-isolation = 20log10 VCOM/VNO, VCOM = output. NO = input to off switch. Note 7: Between any two switches. See Figure 3. 10 ______________________________________________________________________________________ Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES) 100 60 V± = ±5V 40 90 300 80 TA = +125°C 250 70 TA = +85°C 60 TA = +25°C -3 -2 -1 1 0 2 3 4 TA = -55°C -5 -4 -3 -2 ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY) -1 120 TA = +25°C 80 4 0 5 TA = -55°C 10 0 25 50 75 TEMPERATURE (°C) 100 125 250 MAX349/350-TOC7 A: V+ = 5V, V- = -5V B: V+ = 5V, V- = 0V 3 A: V+ = 5V, V- = 5V B: V+ = 5V, V- = 0V 200 tON, tOFF (ns) VCTE (pC) A 0 -1 B 150 100 -2 B = tON A = tON B = tOFF A = tOFF 50 -3 -25 0 25 50 75 TEMPERATURE (°C) DATA HOLD TIME vs. POWER-SUPPLY VOLTAGE 2 1 -50 TURN-ON/TURN-OFF TIMES vs. VCOM 5 4 10 0.1 -25 VCOM (V) CHARGE INJECTION vs. VCOM 125 100 1 -50 5 100 1,000 1 4 12 V± = ±5.5V 50 40 30 DATA HOLD TIME (ns) 3 2 10 10,000 MAX349/350-TOC8 1 8 ON-LEAKAGE vs. TEMPERATURE 0.1 0 6 OFF-LEAKAGE vs. TEMPERATURE 60 40 4 2 VCOM (V) 100 TA = +85°C 100 3 ON-LEAKAGE (pA) RON (Ω) 140 2 MAX349/350-TOC5 TA = +125°C 1 V± = ±5.5V OFF-LEAKAGE (pA) 160 0 VCOM (V) 1,000 MAX349/350-TOC4 V+ = 5V V- = 0V V+ = 12V 0 VCOM (V) 180 V+ = 9V 50 30 5 V+ = 5V MAX349/350-TOC9 -5 -4 V+ = 3V 100 40 0 200 150 50 20 V- = 0V MAX349/350-TOC6 80 RON (Ω) RON (Ω) V± = ±3V V+ = 2.5V 350 RON (Ω) V± = ±2.5V V± = ±5.5V 100 400 MAX349/350-TOC2 120 110 MAX349/350-TOC1 140 ON-RESISTANCE vs. VCOM (SINGLE SUPPLY) MAX349/350-TOC3 ON-RESISTANCE vs. VCOM (DUAL SUPPLIES) 20 10 0 -10 -20 -30 -4 -40 -5 0 -5 -4 -3 -2 -1 0 1 VCOM (V) 2 3 4 5 -50 -5 -4 -3 -2 -1 0 1 VCOM (V) 2 3 4 5 0 2 4 6 8 SUPPLY VOLTAGE (V) ______________________________________________________________________________________ 11 MAX349/MAX350 __________________________________________Typical Operating Characteristics (V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, unless otherwise noted.) POWER-SUPPLY CURRENT vs. TEMPERATURE 90 80 V± = ±5.5V 10 35 MAX349/350-TOC11 100 MAX349/350-TOC10 100 MINIMUM SCLK PULSE WIDTH vs. POSITIVE SUPPLY VOLTAGE I+ MAX349/350-TOC12 DATA SETUP TIME vs. POSITIVE SUPPLY VOLTAGE 30 70 50 1 40 SCLK (ns) 60 I+, I-, (µA) DATA SETUP TIME (ns) 0.1 25 20 30 I- 0.01 20 15 10 0 0.001 4 2 6 10 -50 8 -25 SUPPLY VOLTAGE (V) 0 25 50 75 125 100 OFF ISOLATION -40 V± = ±5V 600Ω IN AND OUT 10 1 0.1 -100 -120 100k 1M 10M FREQUENCY (Hz) 12 -20 -80 -80 -100 10k 0 -60 -60 100 TDH (%) ISOLATION OF A BARE SOCKET 20 PHASE (DEGREES) TOC13 MAX349/350 V± = ±5V 50W IN AND OUT PHASE -40 6 TOTAL HARMONIC DISTORTION vs. FREQUENCY INSERTION LOSS -20 4 2 SUPPLY VOLTAGE (V) FREQUENCY RESPONSE 0 0 TEMPERATURE (°C) MAX349/350-TOC14 0 LOSS (dB) MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers 100M 1G 0.01 10 100 1k 10k FREQUENCY (Hz) ______________________________________________________________________________________ 8 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers PIN MAX349 DIP/SO SSOP 1 1 2 2 3 3 MAX350 DIP/SO SSOP 1 1 2 2 3 3 NAME FUNCTION SCLK V+ DIN Serial Clock Digital Input Positive Analog Supply Voltage Input Serial Data Digital Input Ground. Connect to digital ground. (Analog signals have no ground reference; they are limited to V+ and V-.) Common Analog Switch (mux output) Normally Open Analog Switch Inputs 0–7 Common Analog Switch “A” (mux output) Normally Open Analog Switch “A” Inputs 0–3 Normally Open Analog Switch “B” Inputs 0–3 Common Analog Switch “B” (mux output) No Connect, not internally connected. 4 4 4 4 GND 5 6–13 — — — — 14 5 6–9, 11–14 — — — — 10, 15, 16 — — 5 6–9 10–13 14 — — — 5 6–9 11–14 15 10, 16 COM NO0–NO7 COMA NO0A–NO3A NO3B–NO0B COMB N.C. 15 17 15 17 V- 16 18 16 18 DOUT Serial Data Digital Output. Output high is V+. 17 19 17 19 RESET RESET Input. Connect to logic high (or V+) for normal operation. Drive low to set all switches off and set internal shift registers to 0. 18 20 18 20 CS Negative Analog Supply Voltage Input. Connect to GND for single-supply operation. Chip-Select Digital Input (Figure 1) Note: NO and COM pins are identical and interchangeable. Either may be considered as an input or an output; signals pass equally well in either direction. CS ••• tCSS tCH tCSH2 tON, tOFF SCLK ••• tCL tDS tDH DIN ••• tDO DOUT ••• ••• COM-OUT ••• Figure 1. Timing Diagram ______________________________________________________________________________________ 13 MAX349/MAX350 Pin Description MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers Detailed Description Basic Operation The MAX349/MAX350 are 8-channel and dual 4-channel, serially controlled multiplexers (muxes). These muxes are unusual in that any, all, or none of the input channels can be directed to the output. All switches are bidirectional, so inputs and outputs are interchangeable. When multiple inputs are connected to an output, they are also connected to one another, separated from each other only by the on-resistance of two switches. Both parts require eight bits of serial data to set all eight switches. Serial Digital Interface The MAX349/MAX350 interface can be thought of as an 8-bit shift register controlled by CS (Figure 2). While CS is low, input data appearing at DIN is clocked into the shift register synchronously with SCLK’s rising edge. The input is an 8-bit word, each bit controlling one of the eight switches (Tables 1 and 2). DOUT is the output of the shift register, with data appearing synchronously with SCLK’s falling edge. Data at DOUT is simply the input data delayed by eight clock cycles. When shifting the input data, D7 is the first bit in and out of the shift register. While shifting data, the switches remain in their previous configuration. When the eight bits of data have been shifted in, CS is driven high. This updates the new switch configuration and inhibits further data from entering the shift register. Transitions at DIN and SCLK have no effect when CS is high, and DOUT holds the first input bit (D7) at its output. More or fewer than eight clock cycles can be entered during the CS low period. When this happens, the shift register contains only the last eight serial data bits, regardless of when they were entered. On the rising edge of CS, all switches are set to the corresponding states. The MAX349/MAX350 three-wire serial interface is compatible with SPI, QSPI, and MICROWIRE standards. If interfacing with a Motorola processor serial interface, set CPOL = 0. The MAX349/MAX350 are considered to be slave devices (Figures 2 and 3). At power-up, the shift register contains all zeros, and all switches are off. The latch that drives the analog switch is updated on the rising edge of CS, regardless of SCLK’s state. This meets all SPI and QSPI requirements. Daisy-Chaining For a simple interface using several MAX349s and MAX350s, “daisy-chain” the shift registers as shown in Figure 5. The CS pins of all devices are connected, 14 and a stream of data is shifted through the MAX349s or MAX350s in series. When CS is brought high, all switches are updated simultaneously. Additional shift registers may be included anywhere in series with the MAX349/MAX350 data chain. Note that the DOUT high level is V+, which may not be compatible with TTL/CMOS devices if V+ differs from the logic supply for these other devices. Addressable Serial Interface When several serial devices are configured as slaves, addressable by the processor, DIN pins of each decode logic individually control CS of each slave device. When a slave is selected, its CS pin is driven low, data is shifted in, and CS is driven high to latch the data. Typically, only one slave is addressed at a time. DOUT is not used. Applications Information 8x1 Multiplexer The MAX349 can be programmed normally, with only one channel selected for every eight clock pulses, or it can be programmed in a fast mode, where channel changing occurs on each clock pulse. In fast mode, select the channels by sending a single high pulse (corresponding to the selected channel) at DIN, and a corresponding CS low pulse for every eight clock pulses. As SCLK clocks this through the register, each switch sequences one channel at a time, starting with channel 0. SWITCHES UPDATED CS SCLK DATA CLOCKED IN DIN D7 D6 D5 D4 D3 D2 D1 D0 LSB MSB INPUT DATA BITS DATA CLOCKED OUT DOUT D7 D6 D5 D4 D3 D2 D1 D0 DATA BITS FROM PREVIOUS DATA INPUT DOUT POWER-UP DEFAULT: D7–D0 = 0 Figure 2. 3-Wire Interface Timing ______________________________________________________________________________________ D7 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers DATA BITS RESET 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D7 D6 D5 D4 D3 D2 D1 D0 X 0 1 0 1 X X X X X X X X X X X X X X X 0 1 X X 0 1 X X X X X X X X X X X X X 0 1 X X X X 0 1 X X X X X X X X X X X 0 1 X X X X X X 0 1 X X X X X X X X X 0 1 X X X X X X X X 0 1 X X X X X X X 0 1 X X X X X X X X X X 0 1 X X X X X 0 1 X X X X X X X X X X X X 0 1 X X X 0 1 X X X X X X X X X X X X X X 0 1 MAX349 FUNCTION All switches open, D7–D0 = 0 All switches open, D7–D0 = 0 All switches closed to COM, D7–D0 = 1 Switch 7 open (off) Switch 7 closed to COM Switch 6 open (off) Switch 6 closed to COM Switch 5 open (off) Switch 5 closed to COM Switch 4 open (off) Switch 4 closed to COM Switch 3 open (off) Switch 3 closed to COM Switch 2 open (off) Switch 2 closed to COM Switch 1 open (off) Switch 1 closed to COM Switch 0 open (off) Switch 0 closed to COM Table 2. MAX350 Serial-Interface Switch Programming DATA BITS RESET MAX350 FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 1 X 0 X 0 X 0 X 0 X 0 X 0 X 0 X 0 All switches open, D7–D0 = 0 All switches open, D7–D0 = 0 1 1 1 1 1 1 1 1 1 All “A” switches closed to COMA; All “B” switches closed to COMB, D7–D0 = 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 X X X X X X X X X X X X X X X X 0 1 X X X X X X X X X X X X X X X X 0 1 X X X X X X X X X X X X X X X X 0 1 X X X X X X X X X X X X X X X X 0 1 X X X X X X X X X X X X X X X X 0 1 X X X X X X X X X X X X X X X X 0 1 X X X X X X X X X X X X X X X X 0 1 Switch NO0B open (off) Switch NO0B closed Switch NO1B open (off) Switch NO1B closed Switch NO2B open (off) Switch NO2B closed Switch NO3B open (off) Switch NO3B closed Switch NO3A open (off) Switch NO3A closed Switch NO2A open (off) Switch NO2A closed Switch NO1A open (off) Switch NO1A closed Switch NO0A open (off) Switch NO0A closed X = Don’t care. Data bit D7 is first bit in; data bit D0 is last in. ______________________________________________________________________________________ 15 MAX349/MAX350 Table 1. MAX349 Serial-Interface Switch Programming MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers Dual, Differential 4-Channel Multiplexer The MAX350 can be programmed normally, with only one differential channel selected for every eight clock pulses, or it can be programmed in a fast mode, where channel changing occurs on each clock pulse. In fast mode, select the channels by sending two high pulses, spaced four clock pulses apart (corresponding to the two selected channels) at DIN, and a corresponding CS low pulse for each of the first eight clock pulses. As SCLK clocks this through the register, each switch sequences one differential channel at a time, starting with channel 0. Repeat this process for subse- SCLK SK MAX349 DIN MAX350 SO DOUT SI quent channel sequencing after the first eight bits have been sent. For even faster channel sequencing, send only one DIN high pulse and one CS low pulse for every four clock pulses. Reset Function RESET is the internal reset pin. It is usually connected to a logic signal or V+. Drive RESET low to open all switches and set the contents of the internal shift register to zero simultaneously. When RESET is high, the part functions normally and DOUT is sourced from V+. RESET must not be driven beyond V+ or GND. MICROWIRE PORT DOUT MISO MAX349 DIN MAX350 MOSI SCLK I/O CS CS SPI PORT SCK I/O CPOL = 0, CPHA = 0 THE DOUT-SI CONNECTION IS NOT REQUIRED FOR WRITING TO THE MAX349/MAX350, BUT MAY BE USED FOR DATA-ECHO PURPOSES. THE DOUT-MISO CONNECTION IS NOT REQUIRED FOR WRITING TO THE MAX349/MAX350, BUT MAY BE USED FOR DATA-ECHO PURPOSES. Figure 3. Connections for MICROWIRE SCLK SCLK Figure 4. Connections for SPI and QSPI SCLK MAX349 SCLK MAX349 MAX349 DIN DIN MAX350 DOUT DIN MAX350 DOUT DIN MAX350 DOUT CS CS CS CS TO OTHER SERIAL DEVICES Figure 5. Daisy-Chained Connection 16 ______________________________________________________________________________________ Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers MAX349/MAX350 DIN SCLK CS1 CS2 TO OTHER SERIAL DEVICES CS3 CS CS CS MAX349 MAX349 MAX349 SCLK MAX350 SCLK MAX350 SCLK MAX350 DIN DIN DIN Figure 6. Addressable Serial Interface D4 D0 SCLK SW4 SW0 DIN FOUR CLOCK PULSES Figure 7. Differential Multiplexer Input Control Power-Supply Considerations Overview The MAX349/MAX350 construction is typical of most CMOS analog switches. It has three supply pins: V+, Vand GND. V+ and V- are used to drive the internal CMOS switches, and they set the limits of the analog voltage on any switch. Reverse ESD-protection diodes are internally connected between each analog signal pin and both V+ and V-. If any analog signal exceeds V+ or V-, one of these diodes will conduct. During normal operation, these (and other) reverse-biased ESD diodes leak, forming the only current drawn from V+ or V-. Virtually all the analog leakage current is through the ESD diodes. Although the ESD diodes on a given signal pin are identical, and therefore fairly well balanced, they are reverse biased differently. Each is biased by either V+ or V- and the analog signal. This means their leakages vary as the signal varies. The difference in the two diode leakages to the V+ and V- pins constitutes the analog signal-path leakage current. All analog leakage current flows to the supply terminals, not to the other switch terminal. This is why both sides of a given switch can show leakage currents of either the same or opposite polarity. There is no connection between the analog signal paths and GND. V+ and GND power the internal logic and logic-level translators, and set both the input and output logic limits. The logic-level translators convert the logic levels to switched V+ and V- signals to drive the analog signal gates. This drive signal is the only connection between the logic supplies (and signals) and the analog supplies. V+ and V- have ESD-protection diodes to GND. The logic-level inputs and output have ESD protection to V+ and to GND. The logic-level thresholds are CMOS and TTL compatible when V+ is +5V. As V+ rises, the threshold increases slightly. Therefore, when V+ reaches +12V, the threshold is about 3.1V; above the TTL-guaranteed high-level minimum of 2.8V, but still compatible with CMOS outputs. ______________________________________________________________________________________ 17 MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers Bipolar Supplies The MAX349/MAX350 operate with bipolar supplies from ±3.0V and ±8V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the absolute maximum rating of 17V. Do not connect the MAX349/MAX350 V+ to +3V and connect the logiclevel pins to TTL logic-level signals. This exceeds the absolute maximum ratings and can damage the part and/or external circuits. Single Supply The MAX349/MAX350 operate from single supplies between +3V and +16V when V- is connected to GND. All of the bipolar precautions must be observed. High-Frequency Performance In 50Ω systems, signal response is reasonably flat up to 50MHz (see Typical Operating Characteristics) . Above 20MHz, the on response has several minor peaks that are highly layout dependent. The problem is not turning the switch on, but turning it off. The off-state switch acts like a capacitor and passes higher frequencies with less attenuation. At 10MHz, off-isolation is about -45dB in 50Ω systems, becoming worse (approximately 20dB per decade) as frequency increases. Higher circuit impedances also make off-isolation worse. Adjacent channel attenuation is about 3dB above that of a bare IC socket, and is entirely due to capacitive coupling. Pin Configurations/Functional Diagrams (continued) TOP VIEW SCLK 1 MAX349 V+ 2 20 CS 19 RESET DIN 3 LOGIC 18 DOUT SCLK 1 MAX350 V+ 2 DIN 3 20 CS 19 RESET LOGIC 18 DOUT GND 4 17 V- COM 5 16 N.C. COMA 5 16 N.C. NO0 6 15 N.C. NO0A 6 15 COMB NO1 7 14 NO7 NO1A 7 14 NO0B NO2 8 13 NO6 NO2A 8 13 NO1B NO3 9 12 NO5 NO3A 9 12 NO2B N.C. 10 11 NO4 N.C. 10 11 NO3B SSOP GND 4 17 V- SSOP N.C. = NOT INTERNALLY CONNECTED 18 ______________________________________________________________________________________ Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers PART TEMP. RANGE _________________Chip Topographies MAX349 PIN-PACKAGE V+ MAX349EPN MAX349EWN MAX349EAP MAX349MJN -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 18 Plastic DIP 18 Wide SO 20 SSOP 18 CERDIP** MAX350CPN MAX350CWN MAX350CAP 0°C to +70°C 0°C to +70°C 0°C to +70°C 18 Plastic DIP 18 Wide SO 20 SSOP MAX350C/D MAX350EPN MAX350EWN 0°C to +70°C -40°C to +85°C -40°C to +85°C Dice* 18 Plastic DIP 18 Wide SO NO0 MAX350EAP MAX350MJN -40°C to +85°C -55°C to +125°C 20 SSOP 18 CERDIP** NO1 DIN SCLK CS RESET DOUT V- GND COM NO7 0.120" (3.05mm) NO6 * Contact factory for dice specifications. ** Contact factory for availability. NO2 NO4 NO3 NO5 0.100" (2.54mm) MAX350 V+ DIN SCLK CS RESET DOUT VGND COMA COMB NO0A NO0B 0.120" (3.05mm) NO1A NO1B NO2A NO3A NO3B NO2B 0.100" (2.54mm) TRANSISTOR COUNT: 500 SUBSTRATE CONNECTED TO V+. ______________________________________________________________________________________ 19 MAX349/MAX350 Ordering Information (continued) SSOP.EPS ________________________________________________________Package Information SOICW.EPS MAX349/MAX350 Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.