19-1394; Rev 0; 10/98 1.25Ω, Dual SPST, CMOS Analog Switches Features The MAX4580/MAX4590/MAX4600 dual analog switches feature low on-resistance of 1.25Ω max. On-resistance is matched between switches to 0.25Ω max and is flat (0.3Ω max) over the specified signal range. Each switch can handle Rail-to-Rail® analog signals. The off-leakage current is only 2.5nA max at +85°C. These analog switches are ideal in low-distortion applications and are the preferred solution over mechanical relays in automatic test equipment or applications where current switching is required. They have low power requirements, require less board space, and are more reliable than mechanical relays. The MAX4580 has two NC (normally closed) switches, the MAX4590 has two NO (normally open) switches, and the MAX4600 has one NC (normally closed) and one NO (normally open) switch. These switches operate from a +4.5V to +36V single supply or from ±4.5V to ±20V dual supplies. All digital inputs have +0.8V and +2.4V logic thresholds, ensuring TTL/CMOS-logic compatibility when using a +12V single supply or ±15V dual supplies. ♦ Low On-Resistance (1.25Ω max) ♦ Guaranteed RON Match Between Channels (0.25Ω max) ♦ Guaranteed RON Flatness Over Specified Signal Range (0.3Ω max) ♦ Rail-to-Rail Signal Handling ♦ Guaranteed ESD Protection >2kV per Method 3015.7 ♦ Single-Supply Operation: +4.5V to +36V Dual-Supply Operation: ±4.5V to ±20V ♦ TTL/CMOS-Compatible Control Inputs Ordering Information Applications Reed Relay Replacement Test Equipment Communication Systems PART TEMP. RANGE MAX4580CAE 0°C to +70°C MAX4580CWE MAX4580CPE MAX4580EAE MAX4580EWE MAX4580EPE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 16 SSOP 16 Wide SO 16 Plastic DIP 16 SSOP 16 Wide SO 16 Plastic DIP Ordering Information continued at end of data sheet. PBX, PABX Systems Pin Configurations/Functional Diagrams/Truth Tables TOP VIEW N.C. 1 16 NC1 IN1 2 15 N.C. N.C. 3 14 COM1 V- 4 GND 5 MAX4580 N.C. 6 IN2 7 N.C. 8 N.C. 1 16 N01 IN1 2 15 N.C. N.C. 3 13 V+ V- 4 12 VL GND 5 11 COM2 N.C. 6 10 N.C. IN2 7 NC2 N.C. 8 9 SSOP/SO/DIP LOGIC 0 1 SWITCH ON OFF 14 COM1 MAX4590 LOGIC 0 1 SWITCH OFF ON 16 N01 IN1 2 15 N.C. N.C. 3 13 V+ V- 4 12 VL GND 5 11 COM2 N.C. 6 10 N.C. IN2 7 NO2 N.C. 8 9 SSOP/SO/DIP N.C. 1 14 COM1 13 V+ MAX4600 12 VL 11 COM2 10 N.C. 9 NC1 SSOP/SO/DIP LOGIC 0 1 SWITCH 1 OFF ON SWITCH 2 ON OFF N.C. = NOT INTERNALLY CONNECTED 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. MAX4580/MAX4590/MAX4600 General Description MAX4580/MAX4590/MAX4600 1.25Ω, Dual SPST, CMOS Analog Switches ABSOLUTE MAXIMUM RATINGS V+ to GND ..............................................................-0.3V to +44V V- to GND ...............................................................+0.3V to -44V V+ to V-...................................................................-0.3V to +44V VL to GND.................................................... -0.3V to (V+ + 0.3V) All Other Pins to GND (Note 1) ........... (V- - 0.3V) to (V+ + 0.3V) Continuous Current (COM_, NO_, NC_) ....................... ±200mA Peak Current (COM_, NO_, NC_) (pulsed at 1ms, 10% duty cycle) .............................. ±300mA Continuous Power Dissipation (TA = +70°C) 16 SSOP (derate 7.1mW/°C above +70°C) .................571mW 16 Wide SO (derate 9.52mW/°C above +70°C) ..........762mW 16 Plastic DIP (derate 10.53mW/°C above +70°C) .....842mW Operating Temperature Ranges MAX4_ _0C_E ....................................................0°C to +70°C MAX4_ _0E_E ..................................................-40°C to +85°C Storage Temperature Range ........................... -65°C to +160°C Lead Temperature (soldering, 10sec) ............................+300°C Note 1: Signals on NC_, NO_, COM_, or IN_ exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to maximum 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. ELECTRICAL CHARACTERISTICS–Dual Supplies (V+ = +15V, V- = -15V, VL = +5V, VIN_H = +2.4V, VIN_L = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS ANALOG SWITCH Input Voltage Range (Note 3) VCOM_, VNO_, VNC_ COM_ to NO or NC_ On-Resistance RON COM_ to NO_ or NC_ On-Resistance Match Between Channels (Note 4) ∆RON VTA = +25°C ICOM_ = 10mA, VNO_ or VNC_ = ±10V, TA = TMIN to TMAX ICOM_ = 10mA, VNO_ or VNC_= ±10V 0.9 1.25 1.5 TA = +25°C 0.05 TA = TMIN to TMAX 0.25 V Ω Ω 0.5 COM_ to NO_ or NC_ On-Resistance Flatness (Note 5) RFLAT(ON) Off-Leakage Current (NO_ or NC_) (Note 6) INO_, INC_ VCOM_ = ±10V, – VNO_ or VNC_ = +10V TA = +25°C -0.5 TA = TMIN to TMAX -2.5 COM_ Off-Leakage Current (Note 6) ICOM_(OFF) VCOM_ = ±10V, – VNO_ or VNC_ = +10V TA = +25°C -0.5 TA = TMIN to TMAX -2.5 COM_ On-Leakage Current (Note 6) ICOM_(ON) VCOM_ = ±10V, VNO_ or VNC_= ±10V, or floating ICOM_ = 10mA; VNO_ or VNC_ = -5V, 0, +5V V+ TA = +25°C 0.06 TA = TMIN to TMAX 0.3 Ω 0.5 TA = +25°C -1 TA = TMIN to TMAX -5 0.01 0.5 2.5 0.01 0.5 2.5 0.01 nA nA 1 nA 5 LOGIC INPUT Input Current with Input Voltage High IIN_H IN_ = 2.4V, all others = 0.8V -0.500 0.001 0.500 µA Input Current with Input Voltage Low 2 IIN_L IN_ = 0.8V, all others = 2.4V -0.500 0.001 _______________________________________________________________________________________ 0.500 1.25Ω, Dual SPST, CMOS Analog Switches (V+ = +15V, V- = -15V, VL = +5V, VIN_H = +2.4V, VIN_L = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL Logic Input High Voltage VIN_H Logic Input Low Voltage VIN_L CONDITIONS MIN TYP (Note 2) 2.4 1.7 1.7 MAX UNITS V 0.8 V ±20.0 V POWER SUPPLY Power-Supply Range ±4.5 Positive Supply Current I+ VIN_ = 0 or +5V Negative Supply Current I- VIN_ = 0 or +5V Logic Supply Current IL VIN_ = 0 or +5V IGND VIN_ = 0 or +5V Ground Current TA = +25°C TA = TMIN to TMAX TA = +25°C TA = TMIN to TMAX TA = +25°C TA = TMIN to TMAX TA = +25°C TA = TMIN to TMAX -0.5 0.01 5 -0.5 5 0.01 5 -0.5 0.5 5 0.01 5 -0.5 0.5 0.5 5 0.01 5 0.5 5 µA µA µA µA SWITCH DYNAMIC CHARACTERISTICS Turn-On Time tON Figure 2, VCOM_ = ±10V, TA = +25°C 160 ns Turn-Off Time tOFF Figure 2, VCOM_ = ±10V, TA = +25°C 210 ns CL = 1.0nF, VGEN = 0, RGEN = 0, Figure 3, TA = +25°C -60 pC Charge Injection Q Off-Isolation (Note 7) VISO RL = 50Ω, CL = 5pF, f = 1MHz, Figure 4, TA = +25°C -53 dB Crosstalk (Note 8) VCT RL = 50Ω, CL = 5pF, f = 1MHz, Figure 5, TA = +25°C -65 dB NC_ or NO_ Capacitance C(OFF) f = 1MHz, Figure 6, TA = +25°C 115 pF COM Off-Capacitance C(COM) f = 1MHz, Figure 6, TA = +25°C 115 pF On-Capacitance C(COM) f = 1MHz, Figure 7, TA = +25°C 520 pF _______________________________________________________________________________________ 3 MAX4580/MAX4590/MAX4600 ELECTRICAL CHARACTERISTICS–Dual Supplies (continued) MAX4580/MAX4590/MAX4600 1.25Ω, Dual SPST, CMOS Analog Switches ELECTRICAL CHARACTERISTICS–Single Supply (V+ = +12V, V- = 0, VL = +5V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS ANALOG SWITCH Input Voltage Range (Note 3) VCOM_, VNO_, VNC_ COM_ to NO_ or NC_ On-Resistance RON COM_ to NO_ or NC_ On-Resistance Match Between Channels (Note 4) ∆RON COM_ to NO_ or NC_ On-Resistance Flatness (Note 5) RFLAT(ON) Off-Leakage Current (NO_ or NC_) (Notes 6, 9) INO_, INC_ COM_ Off-Leakage Current (Notes 6, 9) ICOM_(OFF) COM_ On-Leakage Current (Notes 6, 9) ICOM_(ON) GND ICOM_ = 10mA, TA = +25°C VNO_ or VNC_ = +10V, TA = TMIN to TMAX V+ = 12V ICOM_ = 10mA, VNO_ or VNC_ = +10V ICOM_ = 10mA; VNO_ or VNC_ = +3V, +6V, +9V 1.6 3 V Ω 3.5 TA = +25°C 0.4 TA = TMIN to TMAX 0.5 TA = +25°C 0.4 TA = TMIN to TMAX 0.5 VCOM_ = 1V, +10V; TA = +25°C VNO_ or VNC_ = +10V, TA = TMIN to TMAX +1V -0.5 VNO_ or VNC_ = +10V, TA = +25°C +1V; VCOM_ = +1V, TA = TMIN to TMAX +10V -0.5 VCOM_ = +1V, +10V; VNO_ or VNC_ = +1V, +10V, or floating V+ 0.01 Ω Ω 0.5 nA -2.5 2.5 0.01 0.5 nA -2.5 TA = +25°C -1 TA = TMIN to TMAX -10 2.5 0.02 1 nA 10 LOGIC INPUT Input Current with Input Voltage High IIN_L IN_ = 0.8V, all others = 2.4V -0.500 0.001 0.500 µA Input Current with Input Voltage Low IIN_H IN_ = 2.4V, all others = 0.8V -0.500 0.001 0.500 µA Logic Input High Voltage VIN_H Logic Input Low Voltage VIN_L 2.4 V 0.8 V +36.0 V POWER SUPPLY Power-Supply Range +4.5 Positive Supply Current I+ VIN_ = 0 or +5V Logic Supply Current IL VIN_ = 0 or +5V IGND VIN_ = 0 or +5V Ground Current 4 TA = +25°C TA = TMIN to TMAX TA = +25°C TA = TMIN to TMAX TA = +25°C TA = TMIN to TMAX -0.5 0.001 5 -0.5 5 0.001 5 -0.5 0.5 0.5 5 0.001 5 _______________________________________________________________________________________ 0.5 5 µA µA µA 1.25Ω, Dual SPST, CMOS Analog Switches (V+ = +12V, V- = 0, VL = +5V, VIN_H = 2.4V, VIN_L = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL MIN CONDITIONS TYP (Note 2) MAX UNITS SWITCH DYNAMIC CHARACTERISTICS Turn-On Time tON VCOM_ = +10V, Figure 2, TA = +25°C 150 ns Turn-Off Time tOFF VCOM_ = +10V, Figure 2, TA = +25°C 200 ns CL = 1.0nF, VGEN = 0, RGEN = 0, Figure 3, TA = +25°C 40 pC VCT RL = 50Ω, CL = 5pF, f = 1MHz, Figure 5, TA = +25°C -65 dB NC_ or NO_ Capacitance C(OFF)_ f = 1MHz, Figure 6, TA = +25°C 175 pF COM Off-Capacitance C(COM)_ f = 1MHz, Figure 6, TA = +25°C 175 pF On-Capacitance C(COM)_ f = 1MHz, Figure 7, TA = +25°C 275 pF Charge Injection Q Crosstalk (Note 8) Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Note 3: Guaranteed by design. Note 4: ∆RON = RON(MAX) - RON(MIN). Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 6: Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at +25°C. Note 7: Off-isolation = 20 log10 [VCOM / (VNC or VNO)], VCOM = output, VNC or VNO = input to off switch. Note 8: Between any two switches. Note 9: Leakage testing at single supply is guaranteed by testing with dual supplies. Typical Operating Characteristics (Circuit of Figure 1, TA = +25°C, unless otherwise noted.) 2.0 V+, V- = ±15V 1.1 TA = +85°C ON-RESISTANCE vs. VCOM (SINGLE SUPPLY) 5 V- = 0 V+ = +5V 4 1.0 V+, V- = ±15.0V 1.0 0.9 RON (Ω) RON (Ω) 1.5 0.8 0.6 0.5 V+, V- = ±20.0V 0.5 3 V+ = +12V 2 TA = +25°C 0.7 MAX4580 TOC03 V+, V- = ±5.0V RON (Ω) 1.2 MAX4580 TOC01 2.5 ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES) MAX4580 TOC02 ON-RESISTANCE vs. VCOM (DUAL SUPPLIES) 1 TA = -40°C V+ = +24V 0 0.4 -20 -16 -12 -8 -4 0 4 VCOM (V) 8 12 16 20 0 -15 -12 -9 -6 -3 0 3 VCOM (V) 6 9 12 15 0 2 4 6 8 10 12 14 16 18 20 22 24 VCOM (V) _______________________________________________________________________________________ 5 MAX4580/MAX4590/MAX4600 ELECTRICAL CHARACTERISTICS—Single Supply (continued) Typical Operating Characteristics (continued) (Circuit of Figure 1, TA = +25°C, unless otherwise noted.) 400 300 1 TA = +25°C 1.00 TA = -40°C 200 Q (pC) 1.25 LEAKAGE (nA) 1.50 ON-LEAKAGE 0.1 OFF-LEAKAGE 0.50 -400 0.001 -40 0 2 3 4 5 6 7 8 9 10 11 12 -500 -20 0 20 40 60 80 -15 100 -10 -5 POWER-SUPPLY CURRENT vs. TEMPERATURE MAX4580 TOC 08 0 MAX4580 TOC07 1000 -10 LOSS (dB) 100 I+ I- 1 0.01 ON-RESPONSE 0 -30 -90 ON-PHASE -40 -180 -50 -270 OFF-ISOLATION -60 -450 -90 0 20 40 60 80 100 1 10 tON, tOFF (ns) 250 VCOM = +10V RL = 100Ω CL = 35pF V+ = +15V V- = -15V MAX4580 TOC09 TURN-ON/TURN-OFF TIME vs. TEMPERATURE 300 tOFF 200 tON 150 100 50 -40 -15 10 35 60 -540 -630 -720 0.1 FREQUENCY (MHz) TEMPERATURE (°C) 85 TEMPERATURE (°C) 6 -360 V+, V- = 15V INPUT = 0dBm 50Ω IN AND OUT -100 0.01 0.001 +180 -20 -80 -20 10 +90 -70 0.1 -40 5 FREQUENCY RESPONSE 10,000 10 0 VCOM (V) TEMPERATURE (°C) VCOM (V) I+, I- (nA) V+ = +15V V- = -15V -300 V+ = +12V V- = GND 1 0 -200 0.01 0 V+ = +15V V- = 0 100 -100 0.75 0.25 MAX4580 TOC06 V+ = +15V V- = -15V _______________________________________________________________________________________ 100 PHASE (degrees) 1.75 500 MAX4580 TOC05 TA = +85°C 2.00 10 MAX4580 TOC04 2.25 CHARGE INJECTION vs. VCOM ON/OFF-LEAKAGE vs. TEMPERATURE ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY) RON (Ω) MAX4580/MAX4590/MAX4600 1.25Ω, Dual SPST, CMOS Analog Switches 15 1.25Ω, Dual SPST, CMOS Analog Switches TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE TURN-ON/TURN-OFF TIME vs. VCOM tON, tOFF (ns) tOFF 200 V+ = +15V V- = -15V RL = 100Ω CL = 35pF 200 tON 160 MAX4580 TOC11 240 VCOM = +10V RL = 100Ω CL = 35pF tON, tOFF (ns) V+ = +15V V- = -15V 220 MAX4580 TOC10 280 180 tOFF 160 140 tON 120 120 100 -10 -8 80 10 11 12 13 14 15 16 17 18 19 20 -6 -4 -2 0 2 4 6 8 10 VCOM (V) V+, V- (V) Pin Description PIN NAME FUNCTION MAX4580 MAX4590 MAX4600 1, 3, 6, 8, 10, 15 1, 3, 6, 8, 10, 15 1, 3, 6, 8, 10, 15 N.C. 2, 7 2, 7 2, 7 IN1, IN2 4 4 4 V- 5 5 5 GND 12 12 12 VL Logic Supply Input 13 13 13 V+ Positive Analog Supply Input 14, 11 14, 11 14, 11 COM1, COM2 16, 9 – – NC1, NC2 Analog Switch Normally Closed Terminals – 16, 9 – NO1, NO2 Analog Switch Normally Open Terminals – – 9 NC1 Analog Switch Normally Closed Terminal – – 16 NO1 Analog Switch Normally Open Terminal No connection. Not internally connected. Connect to GND or lowimpedance point to improve on/off-isolation. Logic-Control Digital Inputs Negative Analog Supply Voltage Input. Connect to GND for singlesupply operation. Ground Analog Switch Common Terminals _______________________________________________________________________________________ 7 MAX4580/MAX4590/MAX4600 Typical Operating Characteristics (continued) (Circuit of Figure 1, TA = +25°C, unless otherwise noted.) MAX4580/MAX4590/MAX4600 1.25Ω, Dual SPST, CMOS Analog Switches ___________Applications Information +15V Overvoltage Protection D1 Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings can cause permanent damage to the devices. Always sequence V+ on first, then V-, followed by the logic inputs, NO, or COM. If power-supply sequencing is not possible, add two small signal diodes (D1, D2) in series with supply pins for overvoltage protection (Figure 1). Adding diodes reduces the analog signal range to one diode drop below V+ and one diode drop above V-, but does not affect the devices’ low switch resistance and low leakage characteristics. Device operation is unchanged, and the difference between V+ and V- should not exceed 44V. These protection diodes are not recommended when using a single supply. V+ MAX4580 MAX4590 MAX4600 * * * * NO_ COM_ VD2 -15V * INTERNAL PROTECTION DIODES Figure 1. Overvoltage Protection Using External Blocking Diodes +5V LOGIC INPUT t r < 20ns t f < 20ns +3V 50% SWITCH V COM_ INPUT 0 +15V VL COM_ 0.9V0 0 0.9V0 t ON LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. LOGIC INPUT VO RL 100Ω IN_ VO SWITCH OUTPUT V+ NO_ OR NC_ t OFF SWITCH OUTPUT MAX4580 MAX4590 MAX4600 GND V- 0 -15V REPEAT TEST FOR EACH SWITCH. FOR LOAD CONDITIONS, SEE Electrical Characteristics. CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VO = VCOM RL + RON ( ) Figure 2. Switching-Time Test Circuit 8 _______________________________________________________________________________________ CL 35pF 1.25Ω, Dual SPST, CMOS Analog Switches RGEN +5V +15V VL V+ MAX4580/MAX4590/MAX4600 MAX4580 MAX4590 MAX4600 ∆VO VO COM_ NC_ OR NO_ VO VIN OFF CL V GEN GND -15V VIN OFF ON V- IN ON OFF OFF Q = (∆V O )(C L ) VIN = +3V VIN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. Figure 3. Charge-Injection Test Circuit C SIGNAL GENERATOR 0dBm +15V +5V V+ VL MAX4580 MAX4590 MAX4600 SIGNAL GENERATOR 0dBm COM_ IN_ ANALYZER 0 OR 2.4V NC_ OR NO_ GND C RL C +5V V+ VL COM1 50Ω N01 IN2 IN1 0 OR 2.4V COM2 N02 GND V- RL NC C -15V -15V Figure 4. Off-Isolation Test Circuit MAX4580 MAX4590 MAX4600 0 OR 2.4V ANALYZER V- +15V Figure 5. Crosstalk Test Circuit _______________________________________________________________________________________ 9 MAX4580/MAX4590/MAX4600 1.25Ω, Dual SPST, CMOS Analog Switches C +15V V+ COM_ MAX4580 MAX4590 MAX4600 +5V C VL +15V V+ COM_ MAX4580 MAX4590 MAX4600 +5V VL CAPACITANCE METER IN_ 0 or 2.4V CAPACITANCE METER NC_ OR NO_ f = 1MHz GND IN_ NC_ OR NO_ V- C GND -15V Figure 6. Switch Off-Capacitance Test Circuit Ordering Information (continued) PART TEMP. RANGE MAX4590CAE 0°C to +70°C MAX4590CWE MAX4590CPE MAX4590EAE MAX4590EWE MAX4590EPE MAX4600CAE MAX4600CWE MAX4600CPE MAX4600EAE MAX4600EWE MAX4600EPE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 10 0 or 2.4V f = 1MHz PIN-PACKAGE V- C -15V Figure 7. Switch On-Capacitance Test Circuit ___________________Chip Information TRANSISTOR COUNT: 100 16 SSOP 16 Wide SO 16 Plastic DIP 16 SSOP 16 Wide SO 16 Plastic DIP 16 SSOP 16 Plastic DIP 16 Wide SO 16 SSOP 16 Wide SO 16 Plastic DIP ______________________________________________________________________________________ 1.25Ω, Dual SPST, CMOS Analog Switches SSOP.EPS ______________________________________________________________________________________ 11 MAX4580/MAX4590/MAX4600 Package Information 1.25Ω, Dual SPST, CMOS Analog Switches SOICW.EPS MAX4580/MAX4590/MAX4600 Package Information (continued) 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. 12 ____________________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.