To learn more about ON Semiconductor, please visit our website at
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Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers
will need to change in order to meet ON Semiconductor’s system requirements. Since the ON Semiconductor
product management systems do not have the ability to manage part nomenclature that utilizes an underscore
(_), the underscore (_) in the Fairchild part numbers will be changed to a dash (-). This document may contain
device numbers with an underscore (_). Please check the ON Semiconductor website to verify the updated
device numbers. The most current and up-to-date ordering information can be found at www.onsemi.com. Please
email any questions regarding the system integration to Fairchild_questions@onsemi.com.
Is Now Part of
ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number
of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right
to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON
Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON
Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s
technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA
Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended
or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out
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is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
April 2014
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8
FSA1259A — Low-Voltage, 1 Dual SPST Analog Switch with Power-Off Isolation
FSA1259A
Low-Voltage, 1 Ω Dual SPST Analog Switch with
Power-Off Isolation
Features
Power-Off Isolation (VCC=0 V)
1 Ω On Resistance (RON) for 4.5V VCC
0.25 Ω Maximum RON Flatness for 4.5 V VCC
Space-Saving, US8 Surface Mount Package
Broad VCC Operating Range: 1.65 V to 5.50 V
Fast Turn-On and Turn-Off Times
Break-Before-Make Enable Circuitry
Applications
Cellular Phone
Portable Media Player
PDA
Description
The FSA1259A is a high-performance, dual, Single-Pole
/ Single-Throw (SPST) analog switch. The device
features ultra-low RON of 1 at 4.5 V VCC and operates
over the wide VCC range of 1.65 V to 5.50 V.
The FS1259A allows for reduced input thresholds on the
select pins.
The device is fabricated with sub-micron CMOS
technology to achieve fast switching speeds and is
designed for break-before-make operation.
Ordering Information
Part Number Top
Mark
Operating
Temperature Range Package Packing
Method
FSA1259AK8X 59A -40°C to +85°C 8-Lead US8, JEDEC MO-187, Variation
CA, 3.0 mm Wide
3000 Units
Tape and Reel
V
CC
GND
1 8
4
3
2
5
6
7
1A
1B
2S
1S
2B
2A
Figure 1. Analog Symbols
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 2
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
Pin Assignments
Vcc
GND
18
7
6
5
4
3
2
1A
1B
2S
2A
2B
1S
Figure 2. Pin Assignments (Top View)
Pin Definitions
Pin # Name Description
1 1A Data Port
2 1B Data Port
3 2S Control Input
4 GND Ground
5 2A Data Port
6 2B Data Port
7 1S Control Input
8 VCC Supply Voltage
Truth Table
Control Input (S) Function
LOW Disconnected
HIGH A Connected to B
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 3
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol Parameter Min. Max. Unit
VCC Supply Voltage -0.5 7.0 V
VSW Switch Voltage(1) -0.5 VCC +-0.5 V
VIN Input Voltage(1) -0.5 6.5 V
IIK Input Diode Current -50 mA
ISW Switch Current (Continuous) 200 mA
ISWPEAK Peak Switch Current (Pulsed at 1 ms Duration,
<10% Duty Cycle) 400 mA
PD Power Dissipation at 85°C 3.0 µW
TSTG Storage Temperature Range -65 +150 °C
TJ Maximum Junction Temperature +150 °C
TL Lead Temperature (Soldering, 10 seconds) +260 °C
ESD
Human Body Model (JEDEC: JESD22-A114) 8000 V
Charged Device Model (JEDEC: JESD22-C101) 2000 V
Machine Model (JEDEC: JESD22-A115) 350 V
Note:
1. The input and output negative ratings may be exceeded if the input and output diode current ratings are observed.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol Parameter Min. Max. Unit
VCC Supply Voltage 1.65 5.50 V
ASEL Control Input Voltage(2) 0 VCC V
VSW Switch Input Voltage 0 VCC V
TA Operating Temperature -40 +85 °C
JA Thermal Resistance, Still Air 215 °C/W
Note:
2. Control Input must be held HIGH or LOW; it must not float.
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 4
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
Electrical Characteristics
All typical values are at 25°C unless otherwise specified.
Symbol Parameter VCC (V) Conditions TA=+25°C TA=-40 to +85°C Unit
Min. Typ. Max. Min. Max.
VIH Input Voltage High
4.50 to 5.50 1.0
V
3.00 to 3.60 1.0
2.30 to 2.70 0.95
1.65 to 1.95 0.95
VIL Input Voltage Low
4.50 to 5.50 0.75
V
3.00 to 3.60 0.65
2.30 to 2.70 0.55
1.65 to 1.95 0.5
IIN
Control Input
Leakage
5.50 VIN=0 or VCC -10 10 -50 50
nA
3.60 VIN=0 or VCC -2 2 -20 20
2.70 VIN=0 or VCC -2 2 -20 20
1.95 VIN=0 or VCC -2 2 -20 20
INO(0FF) Off-Leakage
Current
5.50 A=1 V, B=4.5V or
B=4.5 V, A= 1V -10 10 -50 50
nA
3.60 A=1 V, B=3.0 V or
B=3.0 V, A=1 V -5 5 -50 50
2.70 A=0.5 V, B=2.3 V or
B=2.3, A=0.5 V -5 5 -50 50
1.95 A=0.3 V, B=1.65 V or
B=1.65, A=0.3 V -5 5 -50 50
INO(On)
On-Leakage
Current of
Port B
5.50 A=Floating; B=4.5 V, 1 V -5 5
-50 50
nA
3.60 A=Floating; B=3.0 V, 1 V -2 2
-20 20
2.70 A=Floating; B=2.3 V, 0.5 V -2 2
-20 20
1.95 A=Floating; B=1.65 V, 0.3 V -2 2
-20 20
IA(ON)
On-Leakage
Current of
Port A
5.50 A=1 V, 4.5 V; B=Floating -5 5 -50 50
nA
3.60 A=1 V, 3.0 V; B=Floating -2 2 -20 20
2.70 A=0.5 V, 2.3; B=Floating -2 2 -20 20
1.95 A=0.3 V, 1.65 V; B=Floating -2 2 -20 20
IOFF
Power Off
Leakage Current
of Port A & Port B
0 A=0 to 5.5 V; B=0 to 5.5 V -1 1 -10 10 µA
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 5
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
Electrical Characteristics (Continued)
All typical values are at 25°C unless otherwise specified.
Symbol Parameter VCC (V) Conditions
TA=+25°C TA=-40 to
+85°C Unit
Min. Typ. Max. Min. Max.
RPEAK Peak On
Resistance
4.50 IOUT=-100 mA,
1B or 2B=0 to VCC 0.8 1.0 1.2
Ω
3.00 IOUT=-100 mA,
1B or 2B=0 to VCC 1.0 1.5 1.8
2.30 IOUT=-8 mA,
1B or 2B=0 to VCC 1.5 2.0 2.5
1.65
IOUT=-2 mA,
1B or 2B=0
to VCC
TA=25, 85°C 5.0 12.0 15.0
TA=-40°C 20.0
RON Switch On
Resistance(3)
4.50 IOUT=-100 mA,
1B or 2B=2.5 V 0.70 0.85 1.00
Ω
3.00 IOUT=-100 mA,
1B or 2B=2.0 V 0.9 1.3 1.6
2.30 IOUT=-8 mA,
1B or 2B=1.8V 1.4 2.0 2.4
1.65 IOUT=-2 mA,
1B or 2B=1.5 V 2.0 2.5 3.5
∆ RON
On Resistance
Matching Between
Channels(4)
4.50 IOUT=-100 mA,
1B or 2B=2.5 V 0.05 0.10 0.10
Ω
3.00 IOUT=-100 mA,
1B or 2B=2.0 V 0.10 0.15 0.15
2.30 I=-8 mA,
1B or 2B=1.8 V 0.15 0.20 0.20
1.65 IOUT=-2 mA
1B or 2B=1.5 V 0.15 0.40 0.40
RFLAT(ON)
On Resistance
Flatness(5)
4.50 IOUT=-100 mA, 1B or
2B=1.0 V, 1.5 V, 2.5 V 0.10 0.25 0.25
Ω
3.00 IOUT=-100 mA,
1B or 2B=0.8 V, 2.0 V 0.1 0.3 0.3
2.30 IOUT=-8 mA,
1B or 2B=0.8 V, 1.8 V 0.2 1.0 1.0
1.65 IOUT=-2 mA,
1B or 2B=0.6 V, 1.5 V 1.5
ICC Quiescent Supply
Current
5.50 VIN=0 or VCC, IOUT=0 5 50 500
nA
3.60 VIN=0 or VCC, IOUT=0 1 25 300
2.70 VIN=0 or VCC, IOUT=0 1 20 250
1.95 VIN=0 or VCC, IOUT=0 1 15 150
ICCT Increase in ICC per
Control Input 4.5 to 5.5 Asel=1.8 V 25 40 µA
Notes:
3. On resistance is determined by the voltage drop between the A and B pins at the indicated current through
the switch.
4. ∆RON=RON maximum – RON minimum; measured at identical VCC, temperature, and voltage.
5. Flatness is defined as the difference between the maximum and minimum value of on resistance over the
specified range of conditions.
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 6
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
AC Electrical Characteristics
All typical values are at VCC=1.8 V, 2.5 V, 3.0 V, 5.0 V at 25°C unless otherwise specified.
Symbol Parameter VCC (V) Conditions TA=+25°C TA=-40 to
+85°C Unit Figure
Min. Typ. Max. Min. Max.
tON Turn-On Time
4.50 to 5.50
1B or 2 B=VCC,
RL=50 Ω,
CL=35 pF
1.0 4.0 7.5 1.0 9.0
ns Figure 11
3.00 to 3.60 1.5 6.0 9.5 1.0 10.0
2.30 to 2.70 2.0 8.0 10.0 1.0 12.0
1.65 to 1.95 3.0 14.0 18.0 1.0 20.0
tOFF Turn-Off Time
4.50 to 5.50
1B or 2B=VCC,
RL=50 Ω,
CL=35 pF
4.5 13.0 17.0 3.5 20.0
ns Figure 11
3.00 to 3.60 4.5 13.5 17.0 3.0 20.0
2.30 to 2.70 4.5 16.0 20.0 3.0 23.0
1.65 to 1.95 5.0 24.0 33.0 4.0 36.0
Q Charge Injection
4.50 to 5.50
CL=1.0 nF,
VGEN=0 V,
RGEN=0 Ω
15
pC Figure 13
3.00 to 3.60 11
2.30 to 2.70 8
1.65 to 1.95 6
OIRR Off-Isolation 1.8 to 5.0 f=1 MHz,
RL=50 Ω -60 dB Figure 12
Xtalk Crosstalk 1.8 to 5.0 f=1 MHz,
RL=50 Ω -73 dB Figure 12
BW -3 db Bandwidth
4.50 to 5.50
RL=50 Ω
240
MHz Figure 15
3.00 to 3.60 240
2.30 to 2.70 240
1.65 to 1.95 240
THD Total Harmonic
Distortion
1.8 RL=600 ,
VIN=0.5 VPP,
f=20 Hz to
20 kHz
.003
%
Figure 16
5.0 .001 Figure 16
Capacitance
Symbol Parameter VCC (V) Conditions TA=+25°C Unit
Min. Typ. Max.
CIN Control Pin Input Capacitance 0 f=1 MHz
Figure 14 3 pF
COFF B Port Off Capacitance 1.65 to 5.50 f=1 MHz
Figure 14 21 pF
CON A Port On Capacitance 1.65 to 5.50 f=1 MHz
Figure 14 47 pF
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 7
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
Typical Performance Characteristics
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
-1.00 0.00 1.00 2.00 3.00 4.00 5.00
V
IN
(V)
R
ON
(Ohms)
-40°C
25°C
85°C
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
-1.00 0.00 1.00 2.00 3.00 4.00
V
IN
(V)
R
ON
(Ohms)
-40°C
25°C
85°C
Figure 3. On Resistance (VCC=4.5 V) Figure 4. On Resistance (VCC=3.0 V)
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
1.60
-0.50 0.00 0.50 1.00 1.50 2.00 2.50 3.00
V
IN
(V)
R
ON
(Ohms)
-40°C
25°C
85°C
V
IN
(V)
R
ON
(Ohms)
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
-0.50 0.00 0.50 1.00 1.50 2.00
-40°C
25°C
85°C
Figure 5. On Resistance (VCC=2.3 V) Figure 6. On Resistance (VCC=1.65 V)
0
-8
-7
-6
-5
-4
-3
-2
-1
1 10 100 1000 10000
Frequency (MHz)
Gain (dB)
0
-8
-7
-6
-5
-4
-3
-2
-1
110 100 1000 10000
Frequency (MHz)
Gain (dB)
Figure 7. Frequency Response (VCC=5.5 V, CL=0 pF) Figure 8. Frequency Response (VCC=3.3 V, CL=0 pF)
-90
-70
-50
-30
-10
0 1 10 100
Frequency (MHz)
Off Isolation (dB)
0.0000
0.0005
0.0010
0.0015
0.0020
0.0025
0.0030
0.0035
0.0040
10 100 1000 10000
Frequency (MHz)
THD (%)
V
CC
=1.8V
V
CC
=5.0V
Figure 9. Frequency Response (VCC=5.0 V, CL=0 pF) Figure 10. Total Harmonic Distortion
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 8
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
Test Diagrams
t
OFF
t
R
= t
F
= 2.5ns
0.9 x V
OUT
0.9 x V
OUT
R
L
50
C
L
35pF
50%
GND
V
CC
Control
Input
Switch
Output
V
OUT
V
OUT
t
ON
V
CC
V
B
1B or 2B
C
L
includes fixture and stray capacitance. Logic input waveforms inverted for switches
that have the opposite logic sense.
A
S
0V
0V
Figure 11. Turn On / Off Timing
GND
OFF ISOLATION = 20log
Network
Analyzer
MEAS REF
A
V
OUT
V
IN
ON-LOSS = 20log V
OUT
V
IN
CROSSTALK = 20logV
OUT
V
IN
1B
2B
S
V
CC
10nF
0 or V
CC
V
CC
50
50 50
50 50
V
OUT
V
IN
Figure 12. Off Isolation and Crosstalk
Q = (ΔV
OUT
) • (C
L
)
ΔV
OUT
V
OUT
In
V
GEN
C
L
V
CC
1B or 2B
GND On Off
V
OUT
Off
In
On
Off
Off
Control
Input
R
GEN
S
A
Figure 13. Charge Injection
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 9
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
Test Diagrams (Continued)
GND
A
S
V+
0V
or
VCC
f = 1MHz
Capacitance
Meter
10nF
1B or 2B
Figure 14. On / Off Capacitance Measurement Setup
Signal
Generator
0dBm
V
IN
V
CC
B
N
50
10nF
S
Logic Input
0V or V
CC
GND
Analyzer
A
Signal
Generator
0dBm
V
IN
V
CC
B
N
R
L
10nF
S
Logic Input
0V or V
CC
GND
Analyzer
A
Figure 15. Bandwidth Figure 16. Harmonic Distortion
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 10
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
Physical Dimensions
SIDE VIEW
TOP VIEW
RECOMMENDED LAND PATTERN
A
B
0.50
SEATING PLANE
0.10-0.18
0.13 AB C
0.50
DETAIL A
0.4 TYP
ALL LEAD TIPS
0.2 C B A
PIN 1 IDENT
ALL LEAD TIPS
0.1 C
8
14
5
(8X) 0.70
2.70 3.40
1.00
DETAIL A
1.80
GAGE PLANE
0.12
C. DIMENSIONS ARE EXCLUSIVE OF BURRS,
D. DIMENSIONS AND TOLERANCES PER
MOLD FLASH, AND TIE BAR EXTRUSIONS.
B. DIMENSIONS ARE IN MILLIMETERS.
A. CONFORMS TO JEDEC REGISTRATION MO-187
ANSI Y14.5M, 1994.
2.10
1.90
2.40
2.20
0.15
3.20
3.00
1.55
0.90 MAX
0.10
0.00
0.80
0.60
0.17-0.27 (8X)
0.30 (8X)
0.20-0.35
0°-8°
C
SEATING
PLANE
E. FILE DRAWING NAME : MKT-MAB08Arev4
Figure 17. 8-Lead US8, JEDEC MO-187, Variation CA, 3.0 mm Wide Package
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
http://www.fairchildsemi.com/dwg/MA/MAB08A.pdf
For current packing container specifications, visit Fairchild Semiconductor’s online packaging area:
http://www.fairchildsemi.com/packing_dwg/PKG-MAB08A_HANABK.pdf
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA1259A Rev. 1.0.8 11
FSA1259A — Low-Voltage, 1 SPST Analog Switch with Power-Off Isolation
www.onsemi.com
1
ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent
coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This
literature is subject to all applicable copyright laws and is not for resale in any manner.
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