19-1392; Rev 1; 8/99 2.5Ω, Dual, SPST, CMOS Analog Switches Features ♦ Low On-Resistance (2.5Ω max) ♦ Guaranteed RON Match Between Channels (0.5Ω max) ♦ Guaranteed RON Flatness over Specified Signal Range (0.5Ω 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 PART MAX4607CSE MAX4607CPE MAX4607ESE MAX4607EPE Applications Reed Relay Replacement PBX, PABX Systems Test Equipment Audio-Signal Routing Communication Systems Avionics TEMP. RANGE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 16 Narrow SO 16 Plastic DIP 16 Narrow SO 16 Plastic DIP Ordering Information continued at end of data sheet. ______________________Pin Configurations/Functional Diagrams/Truth Tables TOP VIEW N.C. 1 16 NC1 N.C. 1 16 NO1 N.C. 1 16 NO1 IN1 2 15 N.C. IN1 2 15 N.C. IN1 2 15 N.C. N.C. 3 14 COM1 N.C. 3 14 COM1 N.C. 3 14 COM1 V- 4 13 V+ V- 4 13 V+ V- 4 13 V+ GND 5 12 VL GND 5 12 VL GND 5 12 VL N.C. 6 11 COM2 N.C. 6 11 COM2 N.C. 6 11 COM2 IN2 7 10 N.C. IN2 7 10 N.C. IN2 7 10 N.C. N.C. 8 9 NC2 N.C. 8 9 NO2 N.C. 8 9 NC2 MAX4607 MAX4608 SO/DIP SO/DIP MAX4609 SO/DIP LOGIC SWITCH LOGIC SWITCH LOGIC SWITCH 1 SWITCH 2 0 1 ON OFF 0 1 OFF ON 0 1 OFF ON ON OFF 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. MAX4607/MAX4608/MAX4609 General Description The MAX4607/MAX4608/MAX4609 dual analog switches feature low on-resistance of 2.5Ω max. On-resistance is matched between switches to 0.5Ω max and is flat (0.5Ω 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 MAX4607 has two normally closed (NC) switches, the MAX4608 has two normally open (NO) switches, and the MAX4609 has one NC and one NO switch. These switches operate from a single supply of +4.5V to +36V or from dual supplies of ±4.5V to ±20V. All digital inputs have +0.8V and +2.4V logic thresholds, ensuring TTL/CMOS-logic compatibility when using dual ±15V or a single +12V supply. MAX4607/MAX4608/MAX4609 2.5Ω, 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 ........................................(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_).........................±100mA Peak Current (COM_, NO_, NC_) (pulsed at 1ms, 10% duty cycle)................................ ±300mA Continuous Power Dissipation (TA = +70°C) Narrow SO (derate 8.70mW/°C above +70°C) .............696mW Plastic DIP (derate 10.53mW/°C above +70°C) ...........842mW Operating Temperature Ranges MAX460_C_E ......................................................0°C to +70°C MAX460_E_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- will be 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.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V ANALOG SWITCH Input Voltage Range (Note 3) COM_ to NO_, COM_ to NC_ On-Resistance COM_ to NO_, COM_ to NC_ On-Resistance Match Between Channels (Note 4) VCOM_, VNO_, VNC_ V- RON ICOM_ = 10mA, VNO_ or VNC_ = ±10V ∆RON ICOM_ = 10mA, VNO_ or VNC_= -5V, 0, 5V TA = +25°C 1.6 TA = TMIN to TMAX 2.5 3 TA = +25°C 0.05 TA = TMIN to TMAX 0.4 Ω Ω 0.5 COM_ to NO_, COM_ to NC_ On-Resistance Flatness (Note 5) RFLAT(ON) ICOM_ = 10mA, VNO_ or VNC_ = ±10V TA = +25°C 0.1 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) VCOM_ = ±10V, VNO_ or VNC_= ±10V, or floating TA = +25°C -1 ICOM_(ON) TA = TMIN to TMAX -10 TA = TMIN to TMAX 0.4 0.5 0.01 0.5 2.5 0.01 0.5 2.5 0.02 Ω nA nA 1 nA 10 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 IIN_L IN_ = 0.8V, all others = 2.4V -0.500 0.001 0.500 µA Logic Input High Voltage VIN_H Logic Input Low Voltage VIN_L 2 2.4 1.7 1.7 _______________________________________________________________________________________ V 0.8 V 2.5Ω, 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.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ±20.0 V POWER SUPPLY Power-Supply Range ±4.5 TA = +25°C Positive Supply Current I+ TA = +25°C I- 0.001 0.5 5 -0.5 5 0.001 0.5 µA TA = +25°C IGND -0.5 5 VIN = 0 or 5V TA = TMIN to TMAX Ground Current 5 µA TA = +25°C IL 0.5 VIN = 0 or 5V TA = TMIN to TMAX Logic Supply Current 0.001 µA TA = TMIN to TMAX Negative Supply Current -0.5 VIN = 0 or 5V 5 -0.5 5 0.001 0.5 VIN = 0 or 5V µA TA = TMIN to TMAX 5 5 SWITCH DYNAMIC CHARACTERISTICS Turn-On Time tON VCOM_ = ±10V, Figure 2, TA = +25°C 110 ns Turn-Off Time tOFF VCOM_ = ±10V, Figure 2, TA = +25°C 150 ns CL = 1.0nF, VGEN = 0, RGEN = 0, Figure 3, TA = +25°C 450 Charge Injection Q pC Off-Isolation (Note 7) VISO RL = 50Ω, CL = 5pF, f = 1MHz, Figure 4, TA = +25°C -60 dB Crosstalk (Note 8) VCT RL = 50Ω, CL = 5pF, f = 1MHz, Figure 5, TA = +25°C -66 dB NC_ or NO_ Capacitance COFF f = 1MHz, Figure 6, TA = +25°C 65 pF COM_ Off-Capacitance CCOM f = 1MHz, Figure 6, TA = +25°C 65 pF On-Capacitance CCOM f = 1MHz, Figure 7, TA = +25°C 290 pF _______________________________________________________________________________________ 3 MAX4607/MAX4608/MAX4609 ELECTRICAL CHARACTERISTICS—Dual Supplies (continued) MAX4607/MAX4608/MAX4609 2.5Ω, Dual, SPST, CMOS Analog Switches ELECTRICAL CHARACTERISTICS—Single Supply (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.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V ANALOG SWITCH Input Voltage Range (Note 3) COM_ to NO_, COM_ to NC_ On-Resistance VCOM_, VNO_, VNC_ GND RON ICOM_ = 10mA, VNO_ or VNC_ = 10V COM_ to NO_, COM_ to NC_ On-Resistance Match Between Channels (Note 4) ∆RON ICOM_ = 10mA, VNO_ or VNC_ = 10V COM_ to NO_, COM_ to NC_ On-Resistance Flatness (Note 5) RFLAT(ON) TA = +25°C 3 TA = TMIN to TMAX 7 TA = +25°C 0.05 TA = TMIN to TMAX ICOM_ = 10mA, VNO_ or VNC_ = 3V, 6V, 0V TA = +25°C 6 0.4 Ω Ω 0.5 0.05 TA = TMIN to TMAX 0.5 Ω 0.5 Off-Leakage Current (NO_ or NC_) (Notes 6, 9) INO_ INC_ VCOM_ = 1V, 10V, VNO_ or VNC_ = 1V, 10V TA = +25°C -0.5 TA = TMIN to TMAX -2.5 COM Off-Leakage Current (Notes 6, 9) VCOM_ = 10V, 1V VNO_ or VNC_ = 1V, 10V TA = +25°C -0.5 ICOM_(OFF) TA = TMIN to TMAX -2.5 COM On-Leakage Current (Notes 6, 9) VCOM_ = 1V, 10V, VNO_ or VNC_= 1V, 10V, or floating TA = +25°C -1 ICOM_(ON) TA = TMIN to TMAX -10 0.01 0.5 nA 2.5 0.01 0.5 nA 2.5 0.01 1 nA 10 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 IIN_L IN_ = 0.8V, all others = 2.4V -0.500 0.001 0.500 µA Logic Input High Voltage VIN_H Logic Input Low Voltage VIN_L 4 2.4 1.7 1.7 _______________________________________________________________________________________ V 0.8 V 2.5Ω, 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.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS +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 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 SWITCH DYNAMIC CHARACTERISTICS Turn-On Time tON VCOM_ = 10V, Figure 2, TA = +25°C 110 ns Turn-Off Time tOFF VCOM_ = 10V, Figure 2, TA = +25°C 130 ns CL = 1.0nF, VGEN = 0, RGEN = 0, Figure 3, TA = +25°C 50 pC RL = 50Ω, CL = 5pF, f = 1MHz, Figure 5, TA = +25°C 66 dB Charge Injection Q Crosstalk (Note 8) VCT NC or NO Capacitance C(OFF) f = 1MHz, Figure 6, TA = +25°C 105 pF COM Off-Capacitance C(COM) f = 1MHz, Figure 6, TA = +25°C 105 pF On-Capacitance C(COM) f = 1MHz, Figure 7, TA = +25°C 185 pF 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 = 20log10 [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. _______________________________________________________________________________________ 5 MAX4607/MAX4608/MAX4609 ELECTRICAL CHARACTERISTICS—Single Supply (continued) Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) 2.2 2.0 1.8 1.6 V+, V- = ±20V V+, V- = ±15V 7 TA = +25°C 1.2 1.0 1.0 -15 -10 -5 0 5 10 15 0 5 10 ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY) ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE 3.0 TA = +25°C V+ = 15V V- = -15V 1k LEAKAGE (pA) TA = +85°C 2.5 0 100 ON-LEAKAGE 10 6 8 10 -300 12 -500 -40 -20 0 40 60 80 150 tON, tOFF (ns) 100 I- 0.1 0.01 120 tON 0 20 40 60 TEMPERATURE (°C) 80 100 10 160 150 tOFF 15 VCOM = +10V RL = 100Ω CL = 35pF 130 120 110 100 100 90 90 80 80 -20 5 140 130 110 1 0 ON/OFF TIME vs. SUPPLY VOLTAGE tOFF 140 -5 170 tON, tOFF (ns) 1k I+ VCOM = +10V RL = 100Ω CL = 35pF 160 -10 VCOM (V) 170 MAX4607/08/09-07 10k -40 -15 100 ON/OFF TIME vs. TEMPERATURE SUPPLY CURRENT vs. TEMPERATURE 6 20 TEMPERATURE (°C) 100k DUAL SUPPLY V+ = V- = 15V -400 VCOM (V) 10 -100 -200 MAX4607/08/09-08 4 25 OFF-LEAKAGE 1 1m 2 20 SINGLE SUPPLY V+ = 12V V- = 0 0 0.01 0 15 100 0.1 1.5 10 CHARGE INJECTION vs. VCOM TA = -40°C 2.0 5 200 Q (pC) 3.5 10k 15 VCOM (V) 100k MAX4607/08/09-04 ICOM = 10mA RON (Ω) -5 VCOM (V) 4.0 V+ = 24V 0 -10 VCOM (V) 4.5 V+ = 12V 1 TA = -40°C -15 20 4 2 MAX4607/08/09-05 -20 5 3 1.4 1.5 V+ = 5V MAX4607/08/09-06 2.5 ICOM = 10mA 8 6 TA = +85°C 2.0 RON (Ω) RON (Ω) 3.0 MAX4607/08/09-03 2.4 9 MAX4607/08/09-09 V+, V- = ±5V V+, V- = ±15V ICOM = 10mA RON (Ω) ICOM = 10mA MAX4607/08/09-02 2.6 MAX4607/08/09-01 4.0 3.5 ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY) ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLY) ON-RESISTANCE (DUAL SUPPLY) I+, I- (nA) MAX4607/MAX4608/MAX4609 2.5Ω, Dual, SPST, CMOS Analog Switches tON 70 -40 -20 0 20 40 60 TEMPERATURE (°C) 80 100 10 11 12 13 14 15 16 17 18 19 20 V+ = V- (V) _______________________________________________________________________________________ 2.5Ω, Dual, SPST, CMOS Analog Switches FREQUENCY RESPONSE MAX4607/08/09-10 RL = 100Ω CL = 35pF 180 -10 140 120 tON -6 -4 -2 0 2 4 6 8 10 -90 -40 -180 -50 -270 -360 -60 OFF-ISOLATION -450 -80 -540 -90 -630 -100 0.01 60 -10 -8 0 -70 80 180 190 ON-PHASE -30 tOFF 100 ON-RESPONSE -20 LOSS (dB) tON, tOFF (ns) 160 MAX4607/08/09-11 0 PHASE (°C) ON/OFF TIME vs. VCOM 200 -720 0.1 10 1 100 FREQUENCY (MHz) VCOM (V) Pin Description PIN NAME FUNCTION MAX4607 MAX4608 MAX4609 2, 7 2, 7 2, 7 IN2, IN2 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 4 4 4 V- 5 5 5 GND Ground 1, 3, 6, 8, 10, 15 1, 3, 6, 8, 10, 15 1, 3, 6, 8, 10, 15 N.C. No Connection. Not internally connected. Connect to GND as low impedance to improve on/off-isolation. 12 12 12 VL Logic-Supply Input 13 13 13 V+ Positive Analog-Supply Input Logic-Control Digital Inputs Analog Switch, Common Terminals Negative Analog Supply-Voltage Input. Connect to DGND for single-supply operation. _______________________________________________________________________________________ 7 MAX4607/MAX4608/MAX4609 Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) MAX4607/MAX4608/MAX4609 2.5Ω, Dual, SPST, CMOS Analog Switches Applications Information Overvoltage Protection 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. Off-Isolation at High Frequencies With the N.C. pins connected to GND, the high-frequency on-response of these parts extends from DC to above 100MHz with a typical loss of -2dB. When the switch is turned off, however, it behaves like a capacitor, and off-isolation decreases with increasing frequency. (Above 300MHz, the switch actually passes more signal turned off than turned on.) This effect is more pronounced with higher source and load impedances. Above 5MHz, circuit-board layout becomes critical, and it becomes difficult to characterize the response of the switch independent of the circuit. The graphs shown in the Typical Operating Characteristics were taken using a 50Ω source and load connected with BNC connectors to a circuit board deemed “average;” that is, designed with isolation in mind, but not using strip-line or other special RF circuit techniques. For critical applications above 5MHz, use the MAX440, MAX441, and MAX442, which are fully characterized up to 160MHz. +15V MAX4607 MAX4608 MAX4609 D1 V+ * * * * NO_ COM_ VD2 -15V * INTERNAL PROTECTION DIODES Figure 1. Overvoltage Protection Using External Blocking Diodes Test Circuits/Timing Diagrams MAX4607 MAX4608 MAX4609 SWITCH V COM_ INPUT +5V +15V VL COM_ VO RL 100Ω IN_ LOGIC INPUT SWITCH OUTPUT V+ NO_ OR NC_ GND LOGIC INPUT 50% 0V CL 35pF t OFF VO 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 ( ) t r < 20ns t f < 20ns +3V SWITCH OUTPUT 0V 0.9V0 t ON LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. Figure 2. Switching-Time Test Circuit 8 0.9V0 _______________________________________________________________________________________ 2.5Ω, Dual, SPST, CMOS Analog Switches MAX4607 MAX4608 MAX4609 RGEN +5V +15V VL V+ ∆VO VO COM NC OR NO VO VIN CL V GEN GND OFF V- IN -15V VIN OFF ON 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 +15V +5V V+ VL SIGNAL GENERATOR 0dBm MAX4607 MAX4608 MAX4609 SIGNAL GENERATOR 0dBm COM 0 or 2.4V IN COM ANALYZER 0 or 2.4V V- RL +15V +5V V+ VL COM1 50Ω NO1 0 or 2.4V COM2 GND C MAX4607 MAX4608 MAX4609 IN2 IN1 N02 ANALYZER NC OR NO GND C V- RL N.C. C -15V -15V Figure 4. Off-Isolation Test Circuit Figure 5. Crosstalk Test Circuit _______________________________________________________________________________________ 9 MAX4607/MAX4608/MAX4609 Test Circuits/Timing Diagrams (continued) MAX4607/MAX4608/MAX4609 2.5Ω, Dual, SPST, CMOS Analog Switches Test Circuits/Timing Diagrams (continued) C +15V +5V V+ VL COM MAX4607 MAX4608 MAX4609 C +15V +5V V+ VL COM MAX4607 MAX4608 MAX4609 CAPACITANCE METER IN IN 0 or 2.4V CAPACITANCE METER NC OR NO NC OR NO f = 1MHz GND V- C GND Figure 6. Switch Off-Capacitance Test Circuit 10 TEMP. RANGE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 16 Narrow SO 16 Plastic DIP 16 Narrow SO 16 Plastic DIP 16 Narrow SO 16 Plastic DIP 16 Narrow SO 16 Plastic DIP C Figure 7. Switch On-Capacitance Test Circuit Ordering Information (continued) PART V- -15V -15V MAX4608CSE MAX4608CPE MAX4608ESE MAX4608EPE MAX4609CSE MAX4609CPE MAX4609ESE MAX4609EPE 0 or 2.4V f = 1MHz Chip Information TRANSISTOR COUNT: 100 ______________________________________________________________________________________ 2.5Ω, Dual, SPST, CMOS Analog Switches SOICN.EPS ______________________________________________________________________________________ 11 MAX4607/MAX4608/MAX4609 Package Information 2.5Ω, Dual, SPST, CMOS Analog Switches PDIPN.EPS MAX4607/MAX4608/MAX4609 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 © 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.