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NC7SZD384
1-Bit Low Power Bus Switch with Level Shifting
NC7SZD384 1-Bit Low Power Bus Switch with Level Shifting
June 1997
Revised December 2005
General Description
The NC7SZD384 provides 1-bit of high-speed CMOS TTL-compatible bus switch. The low on resistance of the switch allows
inputs to be connected to outputs with minimal 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
nected to Port B. When OE
high-impedance state exists between the two ports. Reduced
voltage drive to the gate of the FET switch permits nominal level
shifting of 5V to 3.3V through the switch.
is LOW, the switch is on and Port A is con-
is HIGH, the switch is open and a
Features
O
Space saving SOT23 or SC70 5-lead package
O
Ultra small MicroPak¥ Pb-Free leadless package
O5:
switch connection between two ports
)
O
Designed to be used in level-shifting applications
O
Minimal propagation delay through the switch
O
Low I
CC
O
Zero bounce in flow-through mode
O
Control inputs compatible with TTL level
Ordering Code:
OrderPackage Product Code
NumberNumberTop Mark
NC7SZD384M5XMA05B8Z4D5-Lead SOT23, JEDEC MO-178, 1.6mm3k Units on Tape and Reel
NC7SZD384P5XMAA05AZ4D5-Lead SC70, EIAJ SC-88a, 1.25mm Wide3k Units on Tape and Reel
NC7SZD384L6XMAC06AA4Pb-Free 6-Lead MicroPak, 1.0mm Wide5k Units on T ape and Reel
Pb-Free package per JEDEC J-STD-020B.
Package DescriptionSupplied As
MicroPak¥ is a trademark of Fairchild Semiconductor Corporation.
Supply Voltage (VCC)
DC Switch Voltage (VS)
DC Input Voltage (V
DC Input Diode Current (I
DC Output (I
DC V
OUT
/GND Current (ICC/GND)
CC
Storage Temperature Range (T
Junction Temperature under bias (T
Junction Lead Temperature (T
) (Note 2)
IN
) VIN 0V
IK
) Sink Current128 mA
STG
J
)
L
(Soldering, 10 seconds)
Power Dissipation (P
) @ 85qC
D
SOT23-5200 mW
SC70-5150 mW
0.5V to 7.0V
0.5V to 7.0V
0.5V to 7.0V
)
65q
C to 150qC
)
50 mA
r
100 mA
150qC
260qC
Recommended Operating
Conditions
Power Supply Operating (V
Input Voltage (V
Output Voltage (V
Input Rise and Fall Time (t
Switch Control Input0 ns/V to 5 ns
Switch I/O0 ns/V to DC
Operating Temperature (T
Thermal Resistance (
SOT23-5300
SC70-5425
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.
(Note 3)
)4.5V to 5.5V
)0V to 5.5V
IN
OUT
CC
)0V to 5.5V
, tf)
r
)
A
T
)
JA
40q
C to 85qC
q
C/Watt
q
C/Watt
DC Electrical Characteristics
V
SymbolParameter
V
IK
V
IH
V
IL
V
OH
I
I
I
OFF
R
ON
I
CC
'
I
CC
Note 4: All typical values are at VCC 5.0V, TA
Note 5: 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 6: Per TTL driven input (VIN 3.4V, control input only). A and B pins do not contribute to I
Maximum Clamp Diode Voltage4.5
HIGH Level Input Voltage4.5–5.52.0V
LOW Level Input Voltage4.5–5.50.8V
HIGH Level Output Voltage4.5–5.5See Figure 3VVIN V
Input Leakage Current0–5.5
“OFF” Leakage Current5.5
Switch On Resistance (Note 5)4.55.07.0
Quiescent Supply CurrentVIN VCC or GND, IO 0
Switch On5.50.81.5mAOE
Switch Off5.510.0
Increase in ICC per Input (Note 6)5.50.82.5mAOE 3.4V, IO 0,
25qC.
CC
(V)
TA 40qC to 85qC
MinTyp
(Note 4)
5.07.0
35.050.0
CC.
Max
r
r
1.2
1.0
10.0
UnitsConditions
VIIN 18 mA
P
A0 d VIN d 5.5V
P
A0 d A, B, d V
:::
P
AOE
CC
VIN 0V, II 64 mA
V
V
Control Input only.
CC
0V, II 30 mA
IN
2.4V, II 15 mA
IN
GND
V
CC
3www.fairchildsemi.com
Page 5
AC Electrical Characteristics
TA 40qC to 85qC
NC7SZD384
SymbolParameter
t
, Propagation Delay Bus-to-Bus 4.5–5.50.25nsVI OPEN
PHL
t
PLH
t
PZL
t
PZH
t
PLZ
t
PHZ
Note 7: All typical values are VCC 5.0V, TA 25qC.
Note 8: 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)
, Output Enable Time4.5–5.51.57.5nsVI 7V for t
, Output Disable Time4.5–5.51.06.0nsVI 7V for t
V
CC
(V)MinTyp
CL 50 pF, RU RD 500
(Note 7)
:
MaxNumber
UnitsConditionsFigure
VI OPEN for t
VI OPEN for t
PZLFigures
PZH
PLZFigures
PHZ
Capacitance (Note 9)
SymbolParameterTypMaxUnitsConditions
C
IN
C
I/O
Note 9: TA 25qC f 1MHz
Control Pin Input Capacitance25pFVCC 5.0V
Input/Output Capacitance4.510pFVCC 5.0V
AC Loading and Waveforms
Figures
1, 2
1, 2
1, 2
Note: Input driven by 50
C
includes load and stray capacitance.
L
Input PRR
1.0 MHz tw 500 ns.
:
source terminated in 50:.
FIGURE 1. AC Test Circuit
FIGURE 2. AC Waveforms
www.fairchildsemi.com4
Page 6
DC Characteristics
NC7SZD384
FIGURE 3. Typical High Level Output Voltage vs. Supply Voltage
NC7SZD384 1-Bit Low Power Bus Switch with Level Shifting
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY
ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT
CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
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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, or (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 significant injury to the user.
2. A critical component is 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.
PRODUCT STATUS DEFINITIONS
Definition of terms
Datasheet Identification Product StatusDefinition
Advance InformationF orm ative or In Design This datasheet contains the design specifications for product develop-
PreliminaryFirst ProductionThis datasheet contains preliminary data, and supplementary data will
No Identification NeededFull ProductionThis datasheet contains final specifications. Fairchild Semiconductor
ObsoleteNot In ProductionThis datasheet contains specifications on a product that has been dis-
ment. Specifications may change in any manner without notice.
be published at a later date. Fairchild Semiconductor reserves the right
to make changes at any time without notice in order to improve design.
reserves the right to make changes at any time without notice in order
to improve design.
continued by Fairchild Semiconductor. The datasheet is printed for reference information only.
11www.fairchildsemi.com
Page 13
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