Pin Configurations/Functional Diagrams/Truth Table COM COM GND MAX4644 OFF OFF. Maxim Integrated Products 1

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1 9-7; Rev ; 3/ High-Speed, Low-Voltage, 4Ω, General Description The is a single-pole/double-throw (SPDT) switch that operates from a single supply ranging from +.8V to +.V. It provides low 4Ω on-resistance (R ON ) as well as Ω R ON flatness over the entire analog signal range. The offers fast switching times of less than 2ns while ensuring break-before-make operation. It typically consumes only.µw of quiescent power, making it suitable for use in low-power, portable applications. The s features include low leakage currents over the entire temperature range, TTL/CMOS-compatible digital logic, and excellent AC characteristics. It is packaged in either a small 8-pin µmax or a tiny -pin SOT23. Applications Battery-Operated Equipment Audio and Video Signal Routing Low-Voltage Data-Acquisition Systems Sample-and-Hold Circuits Communications Circuits Rail-to-Rail is a trademark of Nippon Motorola, Ltd. Features +.8V to +.V Single-Supply Operation Rail-to-Rail Analog Signal Range Guaranteed R ON 4Ω max (+V supply) 8Ω max (+3V supply) +.8V Operation R ON 3Ω typ Over Temperature t ON 8ns typ, t OFF 2ns typ Guaranteed RON Flatness:.7Ω typ (+V supply) Guaranteed R ON Match Between Channels:.Ω typ (+V supply) Low Leakage (<.3nA) Over Entire Temperature Range Excellent AC Characteristics Low Crosstalk: -82dB at MHz High Off-Isolation: -8dB at MHz.8% Total Harmonic Distortion Low Power Consumption: <.µw PART EUT-T EUA Ordering Information TEMP. RANGE -4 C to +8 C -4 C to +8 C P- PACKAGE SOT23-8 µmax TOP MARK AAHQ Pin Configurations/Functional Diagrams/Truth Table TOP VIEW N.C SOT23-4 N.C. µmax ON OFF OFF ON Maxim Integrated Products For free samples and the latest literature, visit or phone For small orders, phone

2 ABSOLUTE MAXIMUM RATGS All Voltages Referenced to...-.3v to +V,,, (Note )...-.3V to ( +.3V) Continuous Current (any terminal)...±2ma Continuous Current (,, and )...±ma Peak Current (,, and, pulsed at ms, % duty cycle)... ±ma Continuous Power Dissipation (T A = +7 C) -Pin SOT23 (derate 8.7mW/ C above +7 C)... 9mW 8-Pin µmax (derate 4.mW/ C above +7 C)... 32mW Operating Temperature Range...-4 C to +8 C Junction Temperature...+ C Storage Temperature Range...- C to + C Lead Temperature (soldering, s) C Note : Signals on,,, or exceeding or 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 Single +V Supply ( = +4.V to +.V, V H = 2.4V, V L =.8V, T A = T M to T MAX, unless otherwise noted. Typical values are at.) PARAMETER ANALOG SWITCH Analog Signal Range SYMBOL V, V, V CONDITIONS M TYP MAX UNITS V On-Resistance R ON = 4.V, I = ma, V or V = to T A = T M to T MAX Ω On-Resistance Match Between Channels (Note 2) R ON = 4.V, I = ma, V or V = to T A = T M to T MAX..4 Ω On-Resistance Flatness (Note 3) R FLAT = 4.V, I = ma, V or V = to T A = T M to T MAX.7.2 Ω, Off-Leakage Current (Note 4) I (OFF), I (OFF) =.V, V = V or 4.V, V or V = 4.V or V T A = T M to T MAX na Off-Leakage Current (Note 4) I (OFF) =.V, V = V or 4.V, V or V = 4.V or V T A = T M to T MAX na On-Leakage Current (Notes 4, ) DIGITAL PUTS Input Logic High Input Logic Low Input Current I (ON) V IH V IL I =.V, V = V or 4.V V =.8V or 2.4V T A = T M to T MAX na V V µa 2

3 ELECTRICAL CHARACTERISTICS Single +V Supply (continued) ( = +4.V to +.V, V H = 2.4V, V L =.8V, T A = T M to T MAX, unless otherwise noted. Typical values are at.) PARAMETER DYNAMIC Turn-On Time (Note 4) Turn-Off Time (Note 4) SYMBOL t ON t OFF R L = 3Ω; C L = 3pF; V, V = 3V; Figure 2 R L = 3Ω; C L = 3pF; V, V = 3V; Figure 2 CONDITIONS T A = T M to T MAX T A = T M to T MAX M TYP MAX 8 3 UNITS ns ns Break-Before-Make (Note 4) t BBM R L = 3Ω; C L = 3pF; V or V = +3V; Figure 2 T A = T M to T MAX 8 ns Charge Injection Q V GEN =, R GEN =, C L = nf, Figure 4 pc, Off-Capacitance Switch On-Capacitance Off-Isolation (Note ) Crosstalk (Note 7) Total Harmonic Distortion SUPPLY Positive Supply Current C (OFF), C (OFF) C (ON) V ISO V CT THD I+ or =, f = MHz, Figure f = MHz, Figure C L = pf, R L = Ω, f = MHz Figure 3 f = MHz C L = pf, R L = Ω, f = MHz Figure 3 f = MHz R L = Ω,.Vp-p, f = 2Hz to 2kHz =.V, V = or.. µa pf pf db db % ELECTRICAL CHARACTERISTICS Single +3V Supply ( = +2.7V to +3.3V, V H = 2.V, V L =.4V, T A = T M to T MAX, unless otherwise noted. Typical values are at.) PARAMETER SYMBOL CONDITIONS M TYP MAX UNITS ANALOG SWITCH Analog Signal Range V, V, V V On-Resistance R ON = 2.7V, I = ma, V or V = to T A = T M to T MAX 8 9 Ω On-Resistance Match Between Channels (Note 2) R ON = 2.7V, I = ma, V or V = to T A = T M to T MAX..4 Ω On-Resistance Flatness (Note 3) R FLAT = 2.7V, I = ma, V or V = to. 3 T A = T M to T MAX 3. Ω 3

4 ELECTRICAL CHARACTERISTICS Single +3V Supply (continued) ( = +2.7V to +3.3V, V H = 2.V, V L =.4V, T A = T M to T MAX, unless otherwise noted. Typical values are at.) PARAMETER SYMBOL CONDITIONS M TYP MAX UNITS DIGITAL PUTS Input Logic High V IH 2. V Input Logic Low V IL.4 V Input Current I V =.4V or 2.V -... µa DYNAMIC Turn-On Time (Note 4) t ON R L = 3Ω; C L = 3pF; V, V = 2V; Figure 2 T A = T M to T MAX ns Turn-Off Time (Note 4) t OFF R L = 3Ω; C L = 3pF; V, V = 2V; Figure 2 T A = T M to T MAX ns Break-Before-Make (Note 4) t BBM R L = 3Ω; C L = 3pF; V, V = 2V; Figure 2 T A = T M to T MAX 8 ns Charge Injection, Off-Capacitance Switch On-Capacitance Off-Isolation (Note ) Crosstalk (Note 7) SUPPLY Positive Supply Current Q C (OFF), C (OFF) C (ON) V ISO V CT I+ V GEN =, R GEN =, C L = nf, Figure 4 or =, f = MHz, Figure f = MHz, Figure C L = pf, R L = Ω, Figure 3 C L = pf, R L = Ω, Figure 3 f = MHz f = MHz f = MHz f = MHz = 3.3V, V = or.. µa pc pf pf db db Note 2: R ON = R ON(MAX) - R ON(M). Note 3: R ON flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 4: Guaranteed by design. Note : On-Leakage performed with voltage applied to, with and left floating. Note : Off-Isolation = 2log (V O / V I ), where V O is V and V I is either V or V from the network analyzer. Note 7: Crosstalk is measured between the two switches. 4

5 ( = +V or +3V, V H =, V L =,, unless otherwise noted.) RON (Ω) 2 I = ma ON-RESISTAE vs. V =.8V = 2.V = 3V = V - RON (Ω) ON-RESISTAE vs. TEMPERATURE I = ma = 3V = V Typical Operating Characteristics -2 LEAKAGE (pa) ON-/OFF-LEAKAGE CURRENT vs. TEMPERATURE ON-LEAKAGE OFF-LEAKAGE V (V) TEMPERATURE ( C) TEMPERATURE ( C) 4 2 = V CHARGE JECTION vs. V SUPPLY CURRENT vs. SUPPLY VOLTAGE = = SUPPLY CURRENT vs. TEMPERATURE - CHARGE JECTION (pc) V (V) SUPPLY CURRENT (na) = SUPPLY VOLTAGE (V) SUPPLY CURRENT (na) 2 = V =.8V = 3V TEMPERATURE ( C) LOGIC THRESHOLD (V) LOGIC THRESHOLD vs. SUPPLY VOLTAGE -7 SWITCHG TIMES (ns) SWITCHG TIMES vs. SUPPLY VOLTAGE t ON t OFF -8 SWITCHG TIMES (ns) SWITCHG TIMES vs. TEMPERATURE = V t ON t OFF SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) TEMPERATURE ( C)

6 ( = +V or +3V, V H =, V L =,, unless otherwise noted.) (db/div) = V FREQUEY RESPONSE ON-LOSS OFF-ISOLATION Typical Operating Characteristics (continued) - THD (%) TOTAL HARMONIC DISTORTION vs. FREQUEY = V FREQUEY (MHz)... FREQUEY (khz) Pin Description SOT23 µmax NAME FUTION Logic-Controlled Input 2 4 Positive Supply Voltage Input. Bypass with a.µf capacitor to. 3 3 Ground, 7 N.C. No Connection. Not internally connected. 4 2 Analog Switch Normally Closed Terminal Analog Switch Common Terminal 8 Analog Switch Normally Open Terminal Note: The switches are bidirectional, which means that a signal can be passed through either side of the on switch. However, the typical off-capacitances differ as shown in the Electrical Characteristics.

7 N, Figure. Overvoltage Protection Using External Blocking Diodes Applications Information The operates from a single supply ranging from +.8V to +.V. The device is guaranteed to be functional over that supply range, but TTL/CMOS compatibility is only valid for operation using a +V supply. All voltage levels are referenced to. Positive and negative DC analog inputs or AC signals can be accommodated by shifting and. ESD-protection diodes are internally connected between each analog-signal pin and both and. One of these diodes conducts if any analog signal exceeds or (Figure ). Virtually all of the analog leakage current comes from the ESD diodes to or. 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 or and the analog signal. This means their leakages will vary as the signal varies. The difference in the two diode leakages to the and pins constitutes the analog-signal-path leakage current. All analog leakage current flows between each pin and one of the supply terminals, not to the other switch terminal. This is why both sides of a given switch can show leakage currents of the same or opposite polarity. There is no normal current path between the analogsignal paths and or. and also power the internal logic and logic-level translators. The logiclevel translators convert the logic level into switched and signals to drive the analog signal gates. TRANSISTOR COUNT: Chip Information 7

8 V V Ω OPEN 3pF 3Ω V V IH +.V % % V V 9% 9% t r < ns t f < ns t ON t OFF V V Ω OPEN 3Ω 3pF V V IH +.V % % V V 9% 9% t OFF t ON V S V V V Ω V S 3Ω 3pF V V IH +.V V S V t BBM % % 9% 9% t BBM t BBM = t ON() - t OFF() OR t BBM = t ON() - t OFF() Figure 2. Switching Times 8

9 .µf OR Ω V V OUT NETWORK ANALYZER Ω Ω MEAS REF Ω Ω MEASUREMENTS ARE STANDARDIZED AGAST SHORT AT SOCKET TERMALS. OFF-ISOLATION IS MEASURED BETWEEN AND OFF TERMAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN AND ON TERMAL ON EACH SWITCH. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED. OFF-ISOLATION = 2log V OUT V ON-LOSS = 2log V OUT V Figure 3. Off-Isolation and On-Loss V Ω OR V OR V = V V OUT C L pf AS REQUIRED OR MHz CAPACITAE ANALYZER V Figure.,, and Capacitance V OUT V OUT V OUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = V OUT x C L Figure 4. Charge Injection 9

10 Package Information LSOT.EPS

11 Package Information (continued) 8LUMAXD.EPS

12 TES 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. 2 Maxim Integrated Products, 2 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.