Fairchild NC7SB3257 2:1 multiplexer/demultiplexer bus switch Datasheet

Revised December 2005
NC7SB3257
2:1 Multiplexer/Demultiplexer Bus Switch
General Description
The NC7SB3257 is a high performance, 2:1 NMOS passgate
multiplexer/demultiplexer. The device is fabricated with
advanced sub-micron CMOS technology to achieve high speed
enable and disable times and low On Resistance. The device is
specified to operate over the 4.0 to 5.5V VCC operating range.
The control input tolerates voltages up to 5.5V independent of
the VCC operating range.
Features
O Space saving SC70 6-lead surface mount package
O Ultra small MicroPak¥ leadless package
O Typical 3: switch resistance @ 5.0V VCC
O Minimal propagation delay through the switch
O Power down high impedance control input
O Zero bounce in flow through mode
O TTL compatible control input
O Overvoltage tolerance of control input to 7.0V
O Break before make enable circuitry
Ordering Code:
Order
Number
Package Number
Product Code
Top Mark
NC7SB3257P6X
MAA06A
B7B
NC7SB3257L6X
MAC06A
B7
Package Description
Supplied As
6-Lead SC70, EIAJ SC88, 1.25mm Wide 3k Units on Tape and Reel
Pb-Free 6-Lead MicroPak, 1.0mm Wide
5k Units on Tape and Reel
Pb-Free package per JEDEC J-STD-020B.
MicroPak¥ is a trademark of Fairchild Semiconductor Corporation.
© 2005 Fairchild Semiconductor Corporation
DS500325
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NC7SB3257 2:1 Multiplexer/Demultiplexer Bus Switch
January 2000
NC7SB3257
Logic Symbol
Connection Diagrams
Pin Assignments for SC70
Pin Descriptions
(Top View)
Pin Names
Description
A, B0, B1
Data Ports
S
Control Input
Pin One Orientation Diagram
Function Table
Input (S)
Function
L
B0 Connected to A
H
B1 Connected to A
AAA
Product Code Top Mark - see ordering code
Note: Orientation of Top Mark determines Pin One location. Read the top product
code mark left to right, Pin One is the lower left pin (see diagram).
H HIGH Logic Level
L LOW Logic Level
Pad Assignments for MicroPak
(Top Through View)
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2
0.5V to 7.0V
0.5V to 7.0V
0.5V to 7.0V
Supply Voltage (VCC)
DC Switch Voltage (VS)
DC Output Voltage (VIN) (Note 3)
DC Input Diode Current (IIK)
@ (IIK) VIN 0V
DC Output Current (IOUT)
Recommended Operating
Conditions (Note 2)
Supply Voltage Operating (VCC)
50 mA
Storage Temperature Range (TSTG)
Junction Lead Temperature under Bias (TJ)
Power Dissipation (PD) @ 85qC
0V to VCC
40qC to 85qC
Input Rise and Fall Time (tr, tf)
Control Input VCC
4.0V to 5.5V
0 ns/V to 5 ns/V
Thermal Resistance (TJA)
260qC
(Soldering, 10 seconds)
0V to VCC
Operating Temperature (TA)
r100 mA
65qC to 150qC
150qC
Lead Temperature (TL)
0V to VCC
Switch Input Voltage (VIN)
Output Voltage (VOUT)
128 mA
DC VCC or Ground Current (ICC/IGND)
4.0V to 5.5V
Control Input Voltage (VIN)
350qC/W
Note 1: Absolute maximum ratings are DC values beyond which the device may be
damaged or have its useful life impaired. The datasheet specifications should be met,
without exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. Fairchild does not recommend operation outside datasheet specifications.
180 mW
Note 2: Control input must be held HIGH or LOW, it must not float.
Note 3: The input and output negative voltage ratings may be exceeded if the input
and output diode current ratings are observed.
DC Electrical Characteristics
Symbol
Parameter
VCC
(V)
VIK
Clamp Diode Voltage
VIH
HIGH Level Input Voltage
VIL
LOW Level Input Voltage
TA
Min
40qC to 85qC
Typ
4.5 5.5
Units
2.0
r1.0
r1.0
10.0
PA
PA
:
:
:
:
PA
2.5
mA
IIN
Input Leakage Current
5.5
OFF State Leakage Current
5.5
RON
Switch On Resistance (Note 4)
4.5
3.0
7.0
4.5
3.0
7.0
4.5
6.0
15.0
4.0
10.0
20.0
5.5
'ICC
Increase in ICC Per Input (Note 5)
5.5
IIN
18 mA
0.8
IOFF
Quiescent Supply Current
V
V
4.5 5.5
ICC
Conditions
Max
1.2
4.5
0 d VIN d 5.5V
0 d A, B d VCC
VIN
0V, IIN
64 mA
VIN
0V, IIN
30 mA
VIN
2.4V, IIN
15 mA
VIN
2.4V, IIN
15 mA
VIN
VCC or GND
IOUT
0.9
VIN
0
3.4V, IO
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 Ports).
Note 5: Per TTL driven Input (VIN
3.4V, Control input only). A and B pins do not contribute to ICC.
3
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NC7SB3257
Absolute Maximum Ratings(Note 1)
NC7SB3257
AC Electrical Characteristics
TA
Symbol
Parameter
tPHL
Propagation Delay Bus to Bus
tPLH
(Note 6)
tPZL
Output Enable Time
tPZH
tPLZ
Output Disable Time
tPHZ
tB-M
Break Before Make Time
(Note 7)
VCC
CL
(V)
Min
40qC to 85qC
50 pF, RU
RD 500:
Typ
Units
Conditions
Figure
Max
4.0 55
Number
0.25
4.5 5.5
1.8
6.5
4.0
1.8
7.3
4.5 5.5
0.8
4.0
0.8
4.5 5.5
0.5
4.0
0.5
ns
VI
OPEN
Figures
1, 2
Figures
1, 2
VI
7V for tPZL
VI
0V for tPZH
4.7
VI
7V for tPLZ
5.3
VI
0V for tPHZ
ns
Figures
1, 2
ns
Figure 3
Note 6: This parameter is guaranteed by design but not tested. The bus switch contributes no propagation delay other than the RC delay of the On Resistance of the switch and
the 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance).
Note 7: Guaranteed by design.
Capacitance
(Note 8)
Symbol
Parameter
Typ
Max
Units
Conditions
CIN
Control Pin Input Capacitance
2.3
pF
CIO-B
B Port OFF Capacitance
5.7
pF
VCC
5.0V
CIO-A
A Port ON Capacitance
16.0
pF
VCC
5.0V
Note 8: Capacitance is characterized but not tested.
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4
VCC
0V
NC7SB3257
AC Loading and Waveforms
Note: Input Driven by 50: source terminated in 50:
Note: CL includes load and stray capacitance
Note: Input PRR
1.0 MHz; tW
500 ns
FIGURE 1. AC Test Circuit
Input AC Waveform;
PRR Variable; Duty Cycle
50%
FIGURE 2. AC Waveforms
FIGURE 3. Break Before Make Interval Timing
5
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NC7SB3257
Tape and Reel Specification
TAPE FORMAT for SC70
Package
Designator
Tape
Section
Number
Cavities
Cavity
Status
Cover Tape
Status
Leader (Start End)
125 (typ)
Empty
Sealed
Carrier
3000
Filled
Sealed
Trailer (Hub End)
75 (typ)
Empty
Sealed
P6X
TAPE DIMENSIONS inches (millimeters)
Package
SC70-6
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Tape Size
8 mm
DIM A
DIM B
DIM F
0.093
0.096
0.138 r 0.004
(2.35)
(2.45)
(3.5 r 0.10)
6
DIM Ko
0.053 r 0.004
(1.35 r 0.10)
DIM P1
DIM W
0.157
0.315 r 0.004
(4)
(8 r 0.1)
Package
Designator
Tape
Section
Number
Cavities
Cavity
Status
Leader (Start End)
125 (typ)
Empty
Sealed
Carrier
5000
Filled
Sealed
Trailer (Hub End)
75 (typ)
Empty
Sealed
L6X
Cover Tape
Status
REEL DIMENSIONS inches (millimeters)
Tape Size
8 mm
A
B
C
D
N
7.0
0.059
0.512
0.795
2.165
(177.8)
(1.50)
(13.00)
(20.20)
(55.00)
7
W1
0.331 0.059/0.000
(8.40 1.50/0.00)
W2
0.567
(14.40)
W3
W1 0.078/0.039
(W1 2.00/1.00)
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NC7SB3257
TAPE FORMAT for MicroPak
NC7SB3257
Physical Dimensions inches (millimeters) unless otherwise noted
6-Lead SC70, EIAJ SC88, 1.25mm Wide
Package Number MAA06A
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8
NC7SB3257
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Pb-Free 6-Lead MicroPak, 1.0mm Wide
Package Number MAC06A
9
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NC7SB3257 2:1 Multiplexer/Demultiplexer Bus Switch
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.
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 FAIRCHILD SEMICONDUCTOR CORPORATION
As used herein:
provided in the labeling, can be reasonably expected to
result in significant injury to the user.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body, or
2. A critical component is any component of a life support
(b) support or sustain life, or (c) whose failure to perform
device or system whose failure to perform can be reasonwhen properly used in accordance with instructions for use
ably 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 Status
Definition
Advance Information
Formative or In Design
This datasheet contains the design specifications for product development. Specifications may change in any manner without notice.
Preliminary
First Production
This datasheet contains preliminary data, and supplementary data will
be published at a later date. Fairchild Semiconductor reserves the right
to make changes at any time without notice in order to improve design.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice in order
to improve design.
Obsolete
Not In Production
This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only.
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10
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