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NC7SB3257 2:1 Multiplexer/Demultiplexer Bus Switch
January 2000 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
NC7SB3257P6X NC7SB3257L6X
Package Number
MAA06A MAC06A
Product Code Top Mark
B7B B7
Package Description
Pb-Free 6-Lead MicroPak, 1.0mm Wide
Supplied As
5k Units on Tape and Reel
6-Lead SC70, EIAJ SC88, 1.25mm Wide 3k Units on Tape and Reel
Pb-Free package per JEDEC J-STD-020B.
MicroPak is a trademark of Fairchild Semiconductor Corporation.
(c) 2005 Fairchild Semiconductor Corporation
DS500325
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NC7SB3257
Logic Symbol
Connection Diagrams
Pin Assignments for SC70
Pin Descriptions
(Top View)
Pin Names
A, B0, B1 S
Description
Data Ports Control Input
Pin One Orientation Diagram
Function Table
Input (S)
L H
H HIGH Logic Level L LOW Logic Level
Function
B0 Connected to A 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).
Pad Assignments for MicroPak
(Top Through View)
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NC7SB3257
Absolute Maximum Ratings(Note 1)
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) DC VCC or Ground Current (ICC/IGND) Storage Temperature Range (TSTG) Junction Lead Temperature under Bias (TJ) Lead Temperature (TL) Power Dissipation (PD) @ 85qC (Soldering, 10 seconds)
0.5V to 7.0V 0.5V to 7.0V 0.5V to 7.0V 50 mA r100 mA 65qC to 150qC 150qC 260qC
180 mW 128 mA
Recommended Operating Conditions (Note 2)
Supply Voltage Operating (VCC) Control Input Voltage (VIN) Switch Input Voltage (VIN) Output Voltage (VOUT) Operating Temperature (TA) Input Rise and Fall Time (tr, tf) Control Input VCC 4.0V to 5.5V 0 ns/V to 5 ns/V 350qC/W Thermal Resistance (TJA) 4.0V to 5.5V 0V to VCC 0V to VCC 0V to VCC
40qC to 85qC
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. 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 VIK VIH VIL IIN IOFF RON Parameter Clamp Diode Voltage HIGH Level Input Voltage LOW Level Input Voltage Input Leakage Current OFF State Leakage Current Switch On Resistance (Note 4) VCC (V) 4.5 4.5 5.5 4.5 5.5 5.5 5.5 4.5 4.5 4.5 4.0 ICC Quiescent Supply Current Increase in ICC Per Input (Note 5) 5.5 5.5 0.9 3.0 3.0 6.0 10.0 2.0 0.8 Min TA
40qC to 85qC
Typ Max
Units
Conditions IIN
1.2 r1.0 r1.0
7.0 7.0 15.0 20.0 10.0 2.5
V V
18 mA
PA PA : : : : PA
mA
0 d VIN d 5.5V VIN VIN VIN VIN VIN IOUT VIN 0V, IIN 0V, IIN 2.4V, IIN 2.4V, IIN 0 3.4V, IO
0 d A, B d VCC 64 mA 30 mA 15 mA 15 mA
VCC or GND 0
'ICC
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.
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NC7SB3257
AC Electrical Characteristics
TA Symbol Parameter VCC (V) tPHL tPLH tPZL tPZH tPLZ tPHZ tB-M Break Before Make Time (Note 7) Output Disable Time Propagation Delay Bus to Bus (Note 6) Output Enable Time 4.5 5.5 4.0 4.5 5.5 4.0 4.5 5.5 4.0 1.8 1.8 0.8 0.8 0.5 0.5 6.5 7.3 4.7 5.3 ns ns VI VI VI VI 7V for tPZL 0V for tPZH 7V for tPLZ 0V for tPHZ 4.0 55 CL Min
40qC to 85qC
RD 500: Max 0.25 ns VI OPEN Units Conditions Figure Number Figures 1, 2 Figures 1, 2 Figures 1, 2 Figure 3 Typ
50 pF, RU
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
Symbol CIN CIO-B CIO-A
(Note 8)
Parameter Typ 2.3 5.7 16.0 Max Units pF pF pF Conditions VCC VCC VCC 0V 5.0V 5.0V
Control Pin Input Capacitance B Port OFF Capacitance A Port ON Capacitance
Note 8: Capacitance is characterized but not tested.
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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
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NC7SB3257
Tape and Reel Specification
TAPE FORMAT for SC70
Package Designator
P6X
Tape Section
Leader (Start End) Carrier Trailer (Hub End)
Number Cavities
125 (typ) 3000 75 (typ)
Cavity Status
Empty Filled Empty
Cover Tape Status
Sealed Sealed Sealed
TAPE DIMENSIONS inches (millimeters)
Package
SC70-6
Tape Size
8 mm
DIM A
0.093 (2.35)
DIM B
0.096 (2.45)
DIM F
0.138 r 0.004 (3.5 r 0.10)
0.053 r 0.004 (1.35 r 0.10)
DIM Ko
DIM P1
0.157 (4)
DIM W
0.315 r 0.004 (8 r 0.1)
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NC7SB3257
TAPE FORMAT for MicroPak
Package Designator
L6X
Tape Section
Leader (Start End) Carrier Trailer (Hub End)
Number Cavities
125 (typ) 5000 75 (typ)
Cavity Status
Empty Filled Empty
Cover Tape Status
Sealed Sealed Sealed
REEL DIMENSIONS inches (millimeters)
Tape Size
8 mm
A
7.0 (177.8)
B
0.059 (1.50)
C
0.512 (13.00)
D
0.795 (20.20)
N
2.165 (55.00)
0.331 0.059/0.000 (8.40 1.50/0.00)
W1
W2
0.567 (14.40)
W1 0.078/0.039 (W1 2.00/1.00)
W3
7
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NC7SB3257
Physical Dimensions inches (millimeters) unless otherwise noted
6-Lead SC70, EIAJ SC88, 1.25mm Wide Package Number MAA06A
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NC7SB3257
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Pb-Free 6-Lead MicroPak, 1.0mm Wide Package Number MAC06A
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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
Advance Information Preliminary Formative or In Design First Production
Definition
This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. 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. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only.
No Identification Needed
Full Production
Obsolete
Not In Production
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