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FSA1256 * FSA1257 * FSA1258 Low RON Low Voltage Dual SPST Analog Switch
March 2004 Revised January 2005
FSA1256 * FSA1257 * FSA1258 Low RON Low Voltage Dual SPST Analog Switch
General Description
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.
Features
s Maximum 1.1 On Resistance (RON) for 4.5V supply s 0.4 max RON flatness for 4.5V supply s Space saving Pb-Free MicroPak packaging s Broad VCC operating range: 1.65V to 5.5V s Fast turn-on and turn-off time s FSA1258 features break-before-make enable circuitry s Over-voltage tolerant TTL compatible control input
Ordering Code:
Product Order Number FSA1256L8X FSA1257L8X FSA1258L8X Package Number MAC08A MAC08A MAC08A Code Top Mark EB EC ED Pb-Free 8-Lead MicroPak, 1.6 mm Wide Pb-Free 8-Lead MicroPak, 1.6 mm Wide Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel 5K Units on Tape and Reel 5K Units on Tape and Reel Package Description Supplied As
Pb-Free package per JEDEC J-STD-020B.
Analog Symbols
FSA1256 FSA1257
(Top Through View)
(Top Through View)
Truth Tables
FSA1256 Control Input(s) L H
H = HIGH Logic Level
FSA1257 Function Disconnect A Connected to B Control Input(s) L H Function A Connected to B Disconnect
L = LOW Logic Level
MicroPak is a trademark of Fairchild Semiconductor Corporation.
(c) 2005 Fairchild Semiconductor Corporation
DS500883
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FSA1256 * FSA1257 * FSA1258
Analog Symbol
FSA1258
(Top Through View)
Truth Table
FSA1258 Control Input 1S L H
H = HIGH Logic Level L = LOW Logic Level
Function 1A Connected to 1B Disconnect
Control Input 2S L H
Function Disconnect 2A Connected to 2B
Pin Descriptions
Pin Names A, B S Function Data Ports Control Input
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FSA1256 * FSA1257 * FSA1258
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC) Switch Voltage (VS) (Note 2) Input Voltage (VIN) (Note 2) Input Diode Current Switch Current Peak Switch Current (Pulsed at 1 ms duration, <10% Duty Cycle) Power Dissipation @ 85C MicroPak 8L package Storage Temperature Range (TSTG) Maximum Junction Temperature (TJ) Lead Temperature (TL) Soldering, 10 seconds ESD Human Body Model 5.5kV 180 mW 400 mA
-0.5V to +6.0V -0.5V to VCC + 0.5V -0.5V to +6.0V -50 mA
200 mA
Recommended Operating Conditions
Supply Voltage (VCC) Control Input Voltage (VIN) (Note 3) Switch Input Voltage (VIN) Operating Temperature (TA) Thermal Resistance (JA) in still air MicroPak 8L package 224C/W (modeled) 1.65V to 5.5V 0V to VCC 0V to VCC
-40C to +85C
-65C to +150C +150C +260C
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. Note 2: The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. 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 VIL IIN INO(OFF), INC(OFF) RON RON Switch On Resistance (Note 4) On Resistance Matching Between Channels (Note 5) RFLAT(ON) On Resistance Flatness (Note 6) ICC Quiescent Supply Current 2.7 4.5 3.6 5.5 1.4 0.2 0.1 0.1 0.3 0.5 0.5 0.4 1.0 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 4.5 0.06 0.12 0.15 IOUT = 100 mA, 1B or 2B = 3.5V Parameter Input Voltage High Input Voltage Low Control Input Leakage OFF-Leakage Current VCC (V) 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 5.5 2.7 4.5 -2.0 2.6 0.95 2.0 4.0 1.18 -1.0 -1.0 -20.0 TA = +25C Min Typ Max TA= -40C to +85C Min 2.0 2.4 0.6 0.8 1.0 1.0 20.0 4.3 1.3 Max Units V 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 Conditions
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.
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FSA1256 * FSA1257 * FSA1258
AC Electrical Characteristics (All typical value are @ 25C unless otherwise specified)
Symbol tON tOFF tB-M Q OIRR Xtalk BW THD Parameter Turn ON Time Turn OFF Time Break-Before-Make Time Charge Injection OFF-Isolation Crosstalk -3db Bandwidth Total Harmonic Distortion VCC (V) 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 TA = +25C Min Typ 15.0 10.0 4.0 8.0 12.0 7.0 10.0 20.0 -70.0 -70.0 -100 -100 300 300 0.002 0.002 Max 50.0 35.0 20.0 15.0 TA= -40C to +85C Min Max 60.0 40.0 30.0 20.0 Units ns ns ns pC dB dB MHz % Conditions 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, RGEN = 0 f = 1MHz, RL = 50 f = 1MHz, RL = 50 RL = 50 RL = 600, VIN = 0.5V P.P, f = 20Hz to 20kHz Figure Number Figure 1 Figure 1 Figure 2 Figure 4 Figure 3 Figure 6 Figure 7 Figure 8
Capacitance
Symbol CIN COFF CON Parameter Control Pin Input Capacitance B Port OFF Capacitance A Port ON Capacitance VCC (V) 0.0 4.5 4.5 Min TA = +25C Typ 3.0 11.5 27.0 Max TA = 40C to +85C Min Max pF pF pF f = 1MHz (see Figure 6) f = 1MHz (see Figure 6) f = 1MHz (see Figure 6) Units Conditions
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FSA1256 * FSA1257 * FSA1258
AC Loading and Waveforms
CL includes Fixture and Stray Capacitance
Logic Input Waveforms Inverted for Switches that have the Opposite Logic Sense
FIGURE 1. Turn-On/Turn-Off Timing
FIGURE 2. Break-Before-Make Timing
FIGURE 3. OFF Isolation
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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
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FSA1256 * FSA1257 * FSA1258
AC Loading and Waveforms
(Continued)
FIGURE 7. Bandwidth
FIGURE 8. Harmonic Distortion
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FSA1256 * FSA1257 * FSA1258
Tape and Reel Specification
Tape Format For Micropak Package Designator L8X Tape Section Leader (Start End) Carrier Trailer (Hub End) Number Cavities 125 (typ) 5000 75 (typ) Cavity Status Empty Filled Empty Cover Tape Status Sealed Sealed Sealed
REEL DIMENSIONS inches (millimeters)
Tape Size 8 mm
A 7.0 (177.8)
B 0.059 (1.50)
C 0.512 (13.00)
D 0.795 (20.20)
N 2.165 (55.00)
W1 0.331 + 0.059/-0.000 (8.40 + 1.50/-0.00)
W2 0.567 (14.40)
W3 W1 + 0.078/-0.039 (W1 + 2.00/-1.00)
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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: 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. 9 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. www.fairchildsemi.com
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