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NC7SZ384 TinyLogic UHS 1-Bit Low Power Bus Switch
November 1996
Revised November 2000
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
5
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 inputs compatible with TTL level
Ordering Code:
Order
Number
NC7SZ384M5
NC7SZ384M5X
NC7SZ384P5
NC7SZ384P5X
Package
Number
MA05B
MA05B
MAA05A
MAA05A
Product Code
Top Mark
8Z84
8Z84
Z84
Z84
Package Description
5-Lead SOT23, JEDEC MO-178, 1.6mm
5-Lead SOT23, JEDEC MO-178, 1.6mm
5-Lead SC70, EIAJ SC-88a, 1.25mm Wide
5-Lead SC70, EIAJ SC-88a, 1.25mm Wide
Supplied As
250 Units on Tape and Reel
3k Units on Tape and Reel
250 Units on Tape and Reel
3k Units on Tape and Reel
Logic Diagram
Connection Diagram
(Top View)
Pin Description
Pin Name
OE
A
B
Description
Bus Switch Enable
Bus A
Bus B
Truth Table
OE
L
H
B
O
A
O
HIGH-Z State
Function
Connect
Disconnect
TinyLogic is a trademark of Fairchild Semiconductor Corporation.
© 2000 Fairchild Semiconductor Corporation
DS012178
www.fairchildsemi.com
NC7SZ384
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 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
+
7.0V
−
0.5V to
+
7.0V
−
50 mA
128 mA
Recommended Operating
Conditions
(Note 3)
Power Supply Operating (V
CC
)
Input Voltage (V
IN
)
Output Voltage (V
OUT
)
Input Rise and Fall Time (t
r
, t
f
)
Switch Control Input
Switch I/O
Operating Temperature (T
A
)
Thermal Resistance (
θ
JA
)
SOT23-5
SC70-5
0 ns/V to 5 ns
0 ns/V to DC
4.0V to 5.5V
0V to 5.5V
0V to 5.5V
±
100 mA
−
65
°
C to
+
150
°
C
+
150
°
C
+
260
°
C
−
40
°
C to
+
85
°
C
300
°
C/W
425
°
C/W
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
Symbol
V
IK
V
IH
V
IL
I
IN
I
OFF
R
ON
Parameter
Clamp Diode Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
Input Leakage Current
“OFF” Leakage Current
Switch On Resistance
(Note 4)
V
CC
(V)
4.5
4.5–5.5
4.5–5.5
5.5
5.5
4.5
4.5
4.5
4.0
I
CC
∆
I
CC
Quiescent Supply Current
Increase in I
CC
per Input (Note 5)
5.5
5.5
0.9
3
3
6
10
2.0
0.8
±1.0
±10.0
7
7
15
20
10
2.5
T
A
= −40°C
to
+85°C
Min
Typ
Max
−1.2
Units
−V
V
V
µA
µA
Ω
Ω
Ω
Ω
µA
mA
0
≤
V
IN
≤
5.5V
0
≤
A, B
≤
V
CC
V
IN
=
0V, I
IN
=
64 mA
V
IN
=
0V, I
IN
=
30 mA
V
IN
=
2.4V, I
IN
=
15 mA
V
IN
=
2.4V, I
IN
=
15 mA
V
IN
=
V
CC
or GND
I
O
=
0
V
IN
=
3.4V, I
O
=
0, Control Input only
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
.
Conditions
I
IN
= −18
mA
www.fairchildsemi.com
2
NC7SZ384
AC Electrical Characteristics
T
A
= −40°C
to
+85°C,
Symbol
Parameter
V
CC
(V)
t
PHL
,
t
PLH
t
PZL
,
t
PZH
t
PLZ
,
t
PHZ
Output Disable Time
Prop Delay Bus to Bus
(Note 7)
Output Enable Time
4.5–5.5
4.0
4.5–5.5
4.0
1.0
1.0
1.0
1.0
2.5
2.5
5.0
5.5
5.0
5.5
ns
ns
ns
ns
V
I
=
7V for t
PZL
V
I
=
OPEN for t
PZH
V
I
=
7V for t
PLZ
V
I
=
OPEN for t
PHZ
4.0–5.5
C
L
=
50 pF, RU
=
RD
=
500Ω
Min
Typ
(Note 6)
Max
0.25
ns
V
I
=
OPEN
Figures
1, 2
Figures
1, 2
Figures
1, 2
Units
Conditions
Fig. No.
Capacitance
Symbol
C
IN
C
I/O
(Note 8)
Parameter
Typ
2
4.5
Max
6
10
Units
pF
pF
V
CC
=
5.0V
V
CC
, BE
=
5.0V
Conditions
Control Pin Input Capacitance
Input/Output Capacitance
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 50Ω source terminated in 50Ω
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
3
www.fairchildsemi.com
NC7SZ384
Tape and Reel Specification
TAPE FORMAT
Package
Designator
M5, P5
Carrier
Trailer (Hub End)
Leader (Start End)
M5X, P5X
Carrier
Trailer (Hub End)
TAPE DIMENSIONS
inches (millimeters)
Tape
Section
Leader (Start End)
Number
Cavities
125 (typ)
250
75 (typ)
125 (typ)
3000
75 (typ)
Cavity
Status
Empty
Filled
Empty
Empty
Filled
Empty
Cover Tape
Status
Sealed
Sealed
Sealed
Sealed
Sealed
Sealed
Package
SC70-5
SOT23-5
Tape Size
8 mm
8 mm
DIM A
0.093
(2.35)
0.130
(3.3)
DIM B
0.096
(2.45)
0.130
(3.3)
DIM F
(3.5
±
0.10)
(3.5
±
0.05)
DIM K
o
(1.35
±
0.10)
(1.4
±
0.11)
DIM P1
0.157
(4)
0.157
(4)
DIM W
0.315
±
0.004
(8
±
0.1)
0.315
±
0.012
(8
±
0.3)
0.138
±
0.004 0.053
±
0.004
0.138
±
0.002 0.055
±
0.004
www.fairchildsemi.com
4
FPGA/CPLD
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