2003 Fairchild Semiconductor Corporation
DS012178
www.fairchildsemi.com
November 1996
Revised May 2003
NC7SZ38
4 T
i
ny
Logic
U
H
S 1-Bi
t Low
Power
Bus Sw
i
t
c
h
NC7SZ384
TinyLogic
UHS 1-Bit Low Power Bus Switch
General Description
The NC7SZ384 provides 1-bit of ultra high-speed CMOS
TTL-compatible bus switch. The low On Resistance of the
switch allows inputs to be connected to outputs with mini-
mal propagation delay and without generating additional
ground bounce noise. The device is organized as a 1-bit
switch with a bus enable (OE) signal. When OE is LOW,
the switch is on and Port A is connected to Port B. When
OE is HIGH, 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
5
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 inputs compatible with TTL level
Ordering Code:
Logic Diagram
Pin Description
Truth Table
Connection Diagrams
Pin Assignments for SOT23 and SC70
(Top View)
Pad Assignments for MicroPak
(Top Thru View)
TinyLogic
is a registered trademark of Fairchild Semiconductor Corporation.
MicroPak
is a trademark of Fairchild Semiconductor Corporation.
Order
Package
Product Code
Package Description
Supplied As
Number
Number
Top Mark
NC7SZ384M5X
MA05B
8Z84
5-Lead SOT23, JEDEC MO-178, 1.6mm
3k Units on Tape and Reel
NC7SZ384P5X
MAA05A
Z84
5-Lead SC70, EIAJ SC-88a, 1.25mm Wide
3k Units on Tape and Reel
NC7SZ384L6X
MAC06A
C3
6-Lead MicroPak, 1.0mm Wide
5k Units on Tape and Reel
Pin Name
Description
OE
Bus Switch Enable
A
Bus A
B
Bus B
NC
No Connect
OE
B
O
Function
L
A
O
Connect
H
HIGH-Z State
Disconnect
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2
NC7SZ384
Absolute Maximum Ratings
(Note 1)
Recommended Operating
Conditions
(Note 3)
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
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: Per TTL driven input (V
IN
=
3.4V, control input only). A and B pins do not contribute to I
CC
.
Supply Voltage (V
CC
)
-
0.5V to
+
7.0V
DC Switch Voltage (V
S
)
-
0.5V to
+
7.0V
DC Input Voltage (V
IN
) (Note 2)
-
0.5V to
+
7.0V
DC Input Diode Current
(I
IK
) V
IN
<
0V
-
50 mA
DC Output (I
OUT
) Sink Current
128 mA
DC V
CC
/GND Current
(I
CC
/I
GND
)
100 mA
Storage Temperature Range
(T
STG
)
-
65
C to
+
150
C
Junction Temperature
under Bias (T
J
)
+
150
C
Junction Lead Temperature (T
L
)
(Soldering, 10 Seconds)
+
260
C
Power Dissipation (P
D
) @
+
85
C
SOT23-5
200 mW
SC70-5
150 mW
Power Supply Operating (V
CC
)
4.0V to 5.5V
Input Voltage (V
IN
)
0V to 5.5V
Output Voltage (V
OUT
)
0V to 5.5V
Input Rise and Fall Time (t
r
, t
f
)
Switch Control Input
0 ns/V to 5 ns
Switch I/O
0 ns/V to DC
Operating Temperature (T
A
)
-
40
C to
+
85
C
Thermal Resistance (
JA
)
SOT23-5
300
C/W
SC70-5
425
C/W
Symbol
Parameter
V
CC
T
A
=
-
40
C to
+
85
C
Units
Conditions
(V)
Min
Typ
Max
V
IK
Clamp Diode Voltage
4.5
-
1.2
-
V
I
IN
=
-
18 mA
V
IH
HIGH Level Input Voltage
4.55.5
2.0
V
V
IL
LOW Level Input Voltage
4.55.5
0.8
V
I
IN
Input Leakage Current
5.5
1.0
A
0
V
IN
5.5V
I
OFF
"OFF" Leakage Current
5.5
10.0
A
0
A, B
V
CC
R
ON
Switch On Resistance
4.5
3
7
V
IN
=
0V, I
IN
=
64 mA
(Note 4)
4.5
3
7
V
IN
=
0V, I
IN
=
30 mA
4.5
6
15
V
IN
=
2.4V, I
IN
=
15 mA
4.0
10
20
V
IN
=
2.4V, I
IN
=
15 mA
I
CC
Quiescent Supply Current
5.5
10
A
V
IN
=
V
CC
or GND
I
O
=
0
I
CC
Increase in I
CC
per Input (Note 5)
5.5
0.9
2.5
mA
V
IN
=
3.4V, I
O
=
0, Control Input only
3
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NC7SZ38
4
AC Electrical Characteristics
Capacitance
(Note 8)
Note 6: All typical values are V
CC
=
5.0V, T
A
=
25
C.
Note 7: This parameter is guaranteed by design but is not tested. The bus switch contributes no propagation delay other than the RC delay of the typical On
Resistance of the switch and the 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance).
Note 8: T
A
=
25
C, f
=
1 MHz.
AC Loading and Waveforms
Input driven by 50
source terminated in 50
C
L
includes load and stray capacitance
Input PRR
=
1.0 MHz; t
W
=
500 ns
FIGURE 1. AC Test Circuit
FIGURE 2. AC Waveforms
T
A
=
-
40
C to
+
85
C,
Symbol
Parameter
V
CC
C
L
=
50 pF, RU
=
RD
=
500
Units
Conditions
Figure
(V)
Min
Typ
(Note 6)
Max
Number
t
PHL
,
Propagation Delay Bus to Bus
4.05.5
0.25
ns
V
I
=
OPEN
Figures
1, 2
t
PLH
(Note 7)
t
PZL
,
Output Enable Time
4.55.5
1.0
2.5
5.0
ns
V
I
=
7V for t
PZL
Figures
1, 2
t
PZH
4.0
1.0
5.5
ns
V
I
=
OPEN for t
PZH
t
PLZ
,
Output Disable Time
4.55.5
1.0
2.5
5.0
ns
V
I
=
7V for t
PLZ
Figures
1, 2
t
PHZ
4.0
1.0
5.5
ns
V
I
=
OPEN for t
PHZ
Symbol Parameter
Typ
Max
Units
Conditions
C
IN
Control Pin Input Capacitance
2
6
pF
V
CC
=
5.0V
C
I/O
Input/Output Capacitance
4.5
10
pF
V
CC
, BE
=
5.0V
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4
NC7SZ384
Tape and Reel Specification
TAPE FORMAT for SOT23 and SC70
TAPE DIMENSIONS inches (millimeters)
Package
Tape
Number
Cavity
Cover Tape
Designator
Section
Cavities
Status
Status
Leader (Start End)
125 (typ)
Empty
Sealed
M5X, P5X
Carrier
3000
Filled
Sealed
Trailer (Hub End)
75 (typ)
Empty
Sealed
Package
Tape Size
DIM A
DIM B
DIM F
DIM K
o
DIM P1
DIM W
SC70-5
8 mm
0.093
0.096
0.138
0.004 0.053
0.004
0.157
0.315
0.004
(2.35)
(2.45)
(3.5
0.10)
(1.35
0.10)
(4)
(8
0.1)
SOT23-5
8 mm
0.130
0.130
0.138
0.002 0.055
0.004
0.157
0.315
0.012
(3.3)
(3.3)
(3.5
0.05)
(1.4
0.11)
(4)
(8
0.3)
5
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NC7SZ38
4
Tape and Reel Specification
(Continued)
TAPE FORMAT for MicroPak
REEL DIMENSIONS inches (millimeters)
Package
Tape
Number
Cavity
Cover Tape
Designator
Section
Cavities
Status
Status
Leader (Start End)
125 (typ)
Empty
Sealed
L6X
Carrier
5000
Filled
Sealed
Trailer (Hub End)
75 (typ)
Empty
Sealed
Tape
Size
A
B
C
D
N
W1
W2
W3
8 mm
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)
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6
NC7SZ384
Physical Dimensions
inches (millimeters) unless otherwise noted
5-Lead SOT23, JEDEC MO-178, 1.6mm
Package Number MA05B
7
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NC7SZ38
4
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
5-Lead SC70, EIAJ SC-88a, 1.25mm Wide
Package Number MAA05A
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8
NC7SZ384 T
i
nyLo
gic
UHS
1-Bi
t
Low Power
Bus
Sw
i
t
c
h
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
6-Lead MicroPak, 1.0mm Wide
Package Number MAC06A
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 rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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