Revised January 2005 FSA1256 * FSA1257 * FSA1258 Low RON Low Voltage Dual SPST Analog Switch General Description Features The FSA1256, FSA1257, and FSA1258 are high performance dual Single Pole/Single Throw (SPST) analog switches. These devices feature ultra low RON of 1.1 maximum at 4.5V VCC and will operate over the wide VCC range of 1.65V to 5.5V. These devices are fabricated with sub-micron CMOS technology to achieve fast switching speeds and are designed for break-before-make operation. The select input is TTL level compatible. The FSA1256 features two Normally Open (NO) switches. The FSA1257 features two Normally Closed (NC) switches. The FSA1258 has one NO switch and one NC switch. Maximum 1.1 On Resistance (RON) for 4.5V supply 0.4 max RON flatness for 4.5V supply Space saving Pb-Free MicroPak packaging Broad VCC operating range: 1.65V to 5.5V Fast turn-on and turn-off time FSA1258 features break-before-make enable circuitry Over-voltage tolerant TTL compatible control input Ordering Code: Product Order Package Code Number Number Top Mark Package Description Supplied As FSA1256L8X MAC08A EB Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel FSA1257L8X MAC08A EC Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel FSA1258L8X MAC08A ED Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel Pb-Free package per JEDEC J-STD-020B. Analog Symbols FSA1256 FSA1257 (Top Through View) (Top Through View) Truth Tables FSA1256 FSA1257 Control Input(s) Function Control Input(s) Function L Disconnect L A Connected to B A Connected to B H Disconnect H H = HIGH Logic Level L = LOW Logic Level MicroPak is a trademark of Fairchild Semiconductor Corporation. (c) 2005 Fairchild Semiconductor Corporation DS500883 www.fairchildsemi.com FSA1256 * FSA1257 * FSA1258 Low RON Low Voltage Dual SPST Analog Switch March 2004 FSA1256 * FSA1257 * FSA1258 Analog Symbol FSA1258 (Top Through View) Truth Table FSA1258 Control Input 1S Function Control Input 2S Function L 1A Connected to 1B L Disconnect H Disconnect H 2A Connected to 2B H = HIGH Logic Level L = LOW Logic Level Pin Descriptions www.fairchildsemi.com Pin Names Function A, B Data Ports S Control Input 2 Recommended Operating Conditions -0.5V to +6.0V Supply Voltage (VCC) -0.5V to VCC + 0.5V Switch Voltage (VS) (Note 2) Supply Voltage (VCC) -0.5V to +6.0V Input Voltage (VIN) (Note 2) 1.65V to 5.5V Control Input Voltage (VIN) (Note 3) 0V to VCC 0V to VCC Input Diode Current -50 mA Switch Input Voltage (VIN) Switch Current 200 mA Operating Temperature (TA) -40C to +85C Thermal Resistance (JA) in still air Peak Switch Current (Pulsed at 1 ms duration, <10% Duty Cycle) 400 mA 224C/W MicroPak 8L package Power Dissipation @ 85C (modeled) MicroPak 8L package 180 mW -65C to +150C Storage Temperature Range (TSTG) Note 1: The "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation. +150C Maximum Junction Temperature (TJ) Lead Temperature (TL) +260C Soldering, 10 seconds ESD Human Body Model Note 2: The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. 5.5kV Note 3: Unused inputs must be held HIGH or LOW. They may not float. DC Electrical Characteristics (All typical values are @ 25C unless otherwise specified) Symbol VIH Parameter Input Voltage High VCC (V) TA = +25C Min Typ TA= -40C to +85C Max Min 2.7 to 3.6 2.0 4.5 to 5.5 2.4 Max Input Voltage Low 2.7 to 3.6 IIN Control Input Leakage 2.7 to 3.6 -1.0 1.0 4.5 to 5.5 -1.0 1.0 INO(OFF), OFF-Leakage Current -20.0 20.0 INC(OFF) RON RON 5.5 0.6 0.8 -2.0 2.0 Conditions V VIL 4.5 to 5.5 Units Switch On Resistance 2.7 2.6 4.0 4.3 (Note 4) 4.5 0.95 1.18 1.3 4.5 0.06 0.12 0.15 V A nA VIN = 0V to VCC A = 1V, 4.5V 1B or 2B = 1V, 4.5V IOUT = 100 mA, 1B or 2B = 1.5V IOUT = 100 mA, 1B or 2B = 3.5V On Resistance Matching Between Channels IOUT = 100 mA, 1B or 2B = 3.5V (Note 5) RFLAT(ON) On Resistance Flatness ICC 2.7 1.4 (Note 6) 4.5 0.2 0.3 0.4 Quiescent Supply Current 3.6 0.1 0.5 1.0 5.5 0.1 0.5 1.0 A IOUT = 100 mA, 1B or 2B = 0V, 0.75V, 1.5V IOUT = 100 mA, 1B or 2B = 0V, 1V, 2V VIN = 0V or VCC, IOUT = 0V Note 4: On Resistance is determined by the voltage drop between A and B pins at the indicated current through the switch. Note 5: RON = RONmax - RONmin measured at identical VCC, temperature, and voltage. Note 6: Flatness is defined as the difference between the maximum and minimum value of On Resistance over the specified range of conditions. 3 www.fairchildsemi.com FSA1256 * FSA1257 * FSA1258 Absolute Maximum Ratings(Note 1) FSA1256 * FSA1257 * FSA1258 AC Electrical Characteristics (All typical value are @ 25C unless otherwise specified) Symbol tON tOFF tB-M Q OIRR Xtalk BW THD VCC Parameter TA = +25C Max 2.7 to 3.6 15.0 50.0 60.0 4.5 to 5.5 10.0 35.0 40.0 2.7 to 3.6 4.0 20.0 30.0 4.5 to 5.5 8.0 15.0 20.0 Break-Before-Make 2.7 to 3.6 12.0 Time 4.5 to 5.5 7.0 Turn OFF Time Charge Injection OFF-Isolation Min TA= -40C to +85C Typ Turn ON Time (V) 2.7 to 3.6 10.0 4.5 to 5.5 20.0 2.7 to 3.6 -70.0 4.5 to 5.5 -70.0 2.7 to 3.6 -100 4.5 to 5.5 -100 2.7 to 3.6 300 4.5 to 5.5 300 Total Harmonic 2.7 to 3.6 0.002 Distortion 4.5 to 5.5 0.002 Crosstalk -3db Bandwidth Min Max Units ns ns ns pC Figure Conditions Number 1B or 2B = 1.5V, RL = 50, CL = 35 pF 1B or 2B = 3.0V, RL = 50, CL = 35 pF 1B or 2B = 1.5V, RL = 50, CL = 35 pF 1B or 2B = 3.0V, RL = 50, CL = 35 pF 1B or 2B = 1.5V, RL = 50, CL = 35 pF 1B or 2B = 3.0V, RL = 50, CL = 35 pF CL = 1.0 nF, VGEN = 0V, Figure 1 Figure 1 Figure 2 Figure 4 RGEN = 0 dB f = 1MHz, RL = 50 Figure 3 dB f = 1MHz, RL = 50 Figure 6 RL = 50 Figure 7 MHz % RL = 600, VIN = 0.5V P.P, Figure 8 f = 20Hz to 20kHz Capacitance Symbol Parameter TA = +25C VCC (V) Min Typ TA = 40C to +85C Max Min Units Conditions Max f = 1MHz (see Figure 6) CIN Control Pin Input Capacitance 0.0 3.0 pF COFF B Port OFF Capacitance 4.5 11.5 pF f = 1MHz (see Figure 6) CON A Port ON Capacitance 4.5 27.0 pF f = 1MHz (see Figure 6) www.fairchildsemi.com 4 Logic Input Waveforms Inverted for Switches that have the Opposite Logic Sense CL includes Fixture and Stray Capacitance FIGURE 1. Turn-On/Turn-Off Timing FIGURE 2. Break-Before-Make Timing FIGURE 3. OFF Isolation 5 www.fairchildsemi.com FSA1256 * FSA1257 * FSA1258 AC Loading and Waveforms FSA1256 * FSA1257 * FSA1258 AC Loading and Waveforms (Continued) Q = (VOUT )(CL) FIGURE 4. Charge Injection FIGURE 5. Crosstalk FIGURE 6. ON/OFF Capacitance Measurement Setup www.fairchildsemi.com 6 FSA1256 * FSA1257 * FSA1258 AC Loading and Waveforms (Continued) FIGURE 7. Bandwidth FIGURE 8. Harmonic Distortion 7 www.fairchildsemi.com FSA1256 * FSA1257 * FSA1258 Tape and Reel Specification Tape Format For Micropak Package Tape Number Cavity Section Cavities Status Status Leader (Start End) 125 (typ) Empty Sealed Designator L8X Cover Tape Carrier 5000 Filled Sealed Trailer (Hub End) 75 (typ) Empty Sealed REEL DIMENSIONS inches (millimeters) Tape Size 8 mm A B C D N W1 W2 W3 7.0 0.059 0.512 0.795 2.165 0.331 + 0.059/-0.000 0.567 W1 + 0.078/-0.039 (177.8) (1.50) (13.00) (20.20) (55.00) (8.40 + 1.50/-0.00) (14.40) (W1 + 2.00/-1.00) www.fairchildsemi.com 8 FSA1256 * FSA1257 * FSA1258 Low RON Low Voltage Dual SPST Analog Switch Physical Dimensions inches (millimeters) unless otherwise noted Pb-Free 8-Lead MicroPak, 1.6 mm Wide Package Number MAC08A Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com 9 www.fairchildsemi.com