FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A Low RON Low Voltage Dual SPST Analog Switch with Low ICCT “A” Option
March 2004 Revised April 2005
FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A Low RON Low Voltage Dual SPST Analog Switch with Low ICCT “A” Option
General Description
The FSA1256, FSA1256A, FSA1257, FSA1257A, FSA1258, and FSA1258A are high performance dual Single Pole/Single Throw (SPST) analog switches. All devices feature ultra low RON of 1.1: maximum at 4.5V VCC. The FSA1256, FSA1257, and FSA1258 operate over a wide VCC range of 1.65V to 5.5V. The FSA1256A, FSA1257A, and FSA1258A operation range is 2.7V 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 and FSA1256A feature two Normally Open (NO) switches. The FSA1257 and FSA1257A feature two Normally Closed (NC) switches. The FSA1258 and FSA1258A have one NO switch and one NC switch.
Features
s FSA1256A, FSA1257A, FSA1258A feature low ICCT when S Input is lower than VCC 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:
• FSA1256, FSA1257, FSA1258: 1.65V to 5.5V • FSA1256A, FSA1257A, FSA1258A: 2.7V to 5.5V
s Fast turn-on and turn-off time s FSA1258, FSA1258A feature break-before-make enable circuitry s Over-voltage tolerant TTL compatible control input
Ordering Code:
Product Order Number FSA1256L8X FSA1256AL8X FSA1257L8X FSA1257AL8X FSA1258L8X FSA1258AL8X Package Number MAC08A MAC08A MAC08A MAC08A MAC08A MAC08A Code Top Mark EB FN EC FP ED FS 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 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 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.
MicroPak¥ is a trademark of Fairchild Semiconductor Corporation.
© 2005 Fairchild Semiconductor Corporation
DS500883
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FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A
Analog Symbols
FSA1256, FSA1256A FSA1257, FSA1257A
(Top Through View)
(Top Through View)
Truth Tables
FSA1256, FSA1256A Control Input(s) L H
H HIGH Logic Level
FSA1257, FSA1257A Control Input(s) L H
L LOW Logic Level
Function Disconnect A Connected to B
Function A Connected to B Disconnect
Analog Symbol
FSA1258, FSA1258A
(Top Through View)
Truth Table
FSA1258, FSA1258A Control Input 1S L H
H HIGH Logic Level
Function 1A Connected to 1B Disconnect
L
Control Input 2S L H
LOW Logic Level
Function Disconnect 2A Connected to 2B
Pin Descriptions
Pin Names A, B S Function Data Ports Control Input
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FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A
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 @ 85qC MicroPak 8L package Storage Temperature Range (TSTG) Maximum Junction Temperature (TJ) Lead Temperature (TL) Soldering, 10 seconds ESD Human Body Model FSA1256, FSA1257, FSA1258 FSA1256A, FSA1257A, FSA1258A 5.5kV 4.5kV 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) FSA1256, FSA1257, FSA1258 FSA1256A, FSA1257A, FSA1258A Control Input Voltage (VIN) (Note 3) Switch Input Voltage (VIN) Operating Temperature (TA) Thermal Resistance (TJA) in still air MicroPak 8L package 224qC/W (modeled)
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.
1.65V to 5.5V 2.7V to 5.5V 0V to VCC 0V to VCC
40qC to 85qC
65qC to 150qC 150qC 260qC
DC Electrical Characteristics (All typical values are @ 25qC unless otherwise specified)
Symbol VIH VIL Parameter Input Voltage High Input Voltage Low VCC (V) 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 2.7 to 3.6 4.5 to 5.5 IIN INO(OFF), INC(OFF) RON Switch On Resistance (Note 4) On Resistance Matching Between Channels (Note 5) RFLAT(ON) On Resistance Flatness (Note 6) ICC ICCT Quiescent Supply Current Increase in ICC per Input 2.7 4.5 3.6 5.5 4.3 1.4 0.2 0.1 0.1 0.2 0.3 0.5 0.5 0.4 1.0 1.0 10.0 4.5 0.06 0.12 0.15 Control Input Leakage OFF-Leakage Current 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 1.15 TA Min
25qC
Typ Max
TA 40qC to 85qC Min 2.0 2.4 0.4 0.6 0.8 Max
Units V
Conditions
FSA1256A, FSA1257A, FSA1258A Only V
1.0 1.0 20.0
1.0 1.0 20.0 4.3 1.3
PA
nA
VIN A
0V to VCC 1V, 4.5V 1V, 4.5V 1.5V 3.5V 3.5V 0V, 0.75V, 1.5V 0V, 1V, 2V 100 mA, 1B or 2B 100 mA, 1B or 2B 100 mA, 1B or 2B 100 mA, 1B or 2B 100 mA, 1B or 2B 0V or VCC, IOUT 0V
1B or 2B IOUT IOUT IOUT IOUT IOUT VIN
:
'RON
:
: PA PA
One Input at 2.6V, Others at VCC or GND (FSA1256A, FSA1257A, FSA1258A Only)
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 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A
AC Electrical Characteristics (All typical value are @ 25qC 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 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 Total Harmonic Distortion 2.7 to 3.6 4.5 to 5.5 TA Min
25qC
Typ 15.0 10.0 8.0 4.0 12.0 7.0 10.0 20.0 Max 50.0 35.0 20.0 15.0
TA 40qC to 85qC Min Max 60.0 40.0 30.0 20.0
Units ns ns ns pC dB dB MHz % 1B or 2B 1B or 2B 1B or 2B 1B or 2B 1B or 2B 1B or 2B CL RGEN f f RL RL f 0:
Conditions 1.5V, RL 3.0V, RL 1.5V, RL 3.0V, RL 1.5V, RL 3.0V, RL 50:, CL 50:, CL 50:, CL 50:, CL 50:, CL 50:, CL 0V, 35 pF 35 pF 35 pF 35 pF 35 pF 35 pF
Figure Number Figure 1 Figure 1 Figure 2 Figure 4 Figure 3 Figure 6 Figure 7
1.0 nF, VGEN
70.0 70.0 100 100
300 300 0.002 0.002
1MHz, RL 1MHz, RL 50 : 600:, VIN
50: 50:
3db Bandwidth
0.5V P.P,
20Hz to 20kHz
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
25qC
Typ 3.0 11.5 27.0 Max
TA
40qC to 85qC Max
Units pF pF pF f f f
Conditions 1MHz (see Figure 6) 1MHz (see Figure 6) 1MHz (see Figure 6)
Min
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FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A
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 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A
AC Loading and Waveforms
(Continued)
Q FIGURE 4. Charge Injection
('VOUT )(CL)
FIGURE 5. Crosstalk
FIGURE 6. ON/OFF Capacitance Measurement Setup
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FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A
AC Loading and Waveforms
(Continued)
FIGURE 7. Bandwidth
FIGURE 8. Harmonic Distortion
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FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A
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 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A Low RON Low Voltage Dual SPST Analog Switch with Low ICCT “A” Option
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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