NC7SB121 TinyLogic Low Voltage UHS Single SPST Wide Bandwidth Normally Open Analog Switch
October 2001
Revised October 2001
NC7SB121
TinyLogic
Low Voltage UHS Single SPST
Wide Bandwidth Normally Open Analog Switch
General Description
The NC7SB121 is a ultra high-speed (UHS) CMOS com-
patible single-pole/single-throw (SPST) analog switch or
1-bit bus switch. The LOW on resistance of the switch
allows inputs to be connected to outputs with minimal prop-
agation delay and without generating additional ground
bounce noise. The device is organized as a 1-bit switch
with a switch enable (OE) signal. When OE is HIGH, the
switch is on and Port A is connected to Port B. When OE is
LOW, the switch is open and a high-impedance state exists
between the two ports.
Features
s
Space saving SOT23 or SC70 5-lead package
s
Ultra small MicroPak
leadless package
s
Broad V
CC
Operating Range 2V–5.5V
s
Rail-to-rail signal handling
s
7.2
Ω
switch connection between two ports
s
Minimal propagation delay through the switch
s
Low I
CC
s
Zero bounce in flow-through mode
s
Control input compatible with CMOS input levels
s
>
326 MHz
−
3dB bandwidth
s
Improved package replacement for the P15A121
Ordering Code:
Order
Number
NC7SB121M5X
NC7SB121P5X
NC7SB121L6X
Package
Number
MA05B
MAA05A
MAC06
(Preliminary)
Product Code
Top Mark
7B21
B21
21
Package Description
5-Lead SOT23, JEDEC MO-178, 1.6mm
5-Lead SC70, EIAJ SC-88a, 1.25mm Wide
6-Lead MicroPak, 1.0mm Wide
Supplied As
3k Units on Tape and Reel
3k Units on Tape and Reel
5k Units on Tape and Reel
TinyLogic and MicroPak are trademarks of Fairchild Semiconductor Corporation.
© 2001 Fairchild Semiconductor Corporation
DS500662
www.fairchildsemi.com
NC7SB121
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
CC
)
DC Switch Voltage (V
S
)
DC Input Voltage (V
IN
) (Note 2)
DC Input Diode Current
(I
IK
) V
IN
<
0V
DC Output (I
OUT
) Sink Current
DC V
CC
/GND Current (I
CC
/I
GND
)
Storage Temperature Range
(T
STG
)
Junction Lead Temperature
under Bias (T
J
)
Junction Lead Temperature (T
L
)
(Soldering, 10 Seconds)
Power Dissipation (P
D
) @
+
85
°
C
SOT23-5
SC70-5
200 mW
150 mW
−
0.5V to
+
7.0V
−
0.5V to V
CC
+
0.5V
−
0.5V to
+
7.0V
−
50 mA
128 mA
Recommended Operating
Conditions
(Note 3)
Power Supply Operating (V
CC
)
Control Input Voltage (V
IN
)
Switch Input Voltage (V
IN
)
Switch Output Voltage (V
OUT
)
Input Rise and Fall Time (t
r
, t
f
)
Control Input; V
CC
=
2.3V
−
3.6V
Control Input; V
CC
=
4.5
−
5.5V
Switch I/O
Operating Temperature (T
A
)
Thermal Resistance (
θ
JA
)
SOT23-5
300
°
C/Watt
425
°
C/Watt
SC70-5
0 ns/V to 10 ns
0 ns/V to 5 ns
0 ns/V to DC
2V to 5.5V
0V to 5.5V
0V to V
CC
0V to V
CC
±
100 mA
−
65
°
C to
+
150
°
C
+
150
°
C
+
260
°
C
−
40
°
C to
+
85
°
C
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
V
CC
Symbol
V
IH
V
IL
I
IN
I
OFF
R
ON
R
flat
I
CC
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
Control Input
Leakage Current
OFF Leakage Current
Switch On Resistance
(Note 4)
On Resistance Flatness
(Note 4)(Note 6)(Note 7)
Quiescent Supply Current
(V)
2 to 5.5
2 to 5.5
0 to 5.5
2 to 5.5
4.5
3.0
5.0
3.3
2 to 5.5
7.2
12
3.2
4.5
10
18
3.5
5
1
0.05
12
±0.05
±0.05
Min
T
A
= +25°C
Typ
Max
T
A
= −40°C
to
+85°C
Min
0.7 V
CC
0.3 V
CC
±1.0
±10.0
12
22
4
5
10
Typ
(Note 5)
Max
Units
V
V
µA
µA
Ω
Ω
µA
0
≤
V
IN
≤
5.5V
0
≤
A, B
≤
V
CC
V
IN
=
2.5V, I
IN
=
30 mA
V
IN
=
1.5V, I
IN
=
24 mA
I
A
= −30
mA, V
IN
=
1, 2.5, 4V
I
A
= −24
mA, V
IN
=
0.8, 2.5V
V
IN
=
V
CC
or GND
I
OUT
=
0
Note 4:
Measured by the voltage drop between A and B pins at the indicated current through the switch. On Resistance is determined by the lower of the
voltages on the two (A or B) pins.
Note 5:
All typical values are at the specified V
CC
, and T
A
=
25°C.
Note 6:
Parameter is characterized but not tested in production.
Note 7:
Flatness is defined as the difference between the maximum and minimum value of On Resistance over the specified range of conditions.
Conditions
3
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