Fairchild NC7SB3257 User Manual
NC7SB3257
NC7SB3257 TinyLogic
January 2000
Revised April 2002
TinyLogic
UHS
2:1 Multiplexer/Demultiplexer Bus Switch
General Description
The NC7SB3257 is a high performance, 2:1 NM OS passgate multiplexer/demultiplexer from Fairchild’s Ultra High
Speed Series of TinyLogic
advanced sub-micron CMOS technology to achieve high
speed enable and disable time s and low On Resistance.
The device is specified to operate over the 4.0 to 5.5V V
operating range. T he control input to lerates volt ages up to
5.5V independent of the V
. The device is fabricated with
operating range.
CC
Ordering Code:
Order
Number
NC7SB3257P6X MAA06A B7B 6-Lead SC70, EIAJ SC88, 1.25mm Wide 3k Units on Tape and Reel
NC7SB3257L6X MAC06A B7 6-Lead MicroPak, 1.0mm Wide 5k Units on Tape and Reel
Package
Number
Product Code
Top Mark
Features
■ Space saving SC70 6-lead surface mount package
■ Ultra small MicroPak
■ Typical 3
■ Minimal propagation delay through the switch
■ Power down high impedance cont rol input
CC
■ Zero bounce in flow through mode
■ TTL compatible control input
■ Overvoltage tolerance of control input to 7.0V
■ Break before make enable circuitry
Package Descript ion Supplied As
Ω switch resistance @ 5.0V V
leadless package
CC
UHS 2:1 Multiplexer/Demultiplexer Bus Switch
TinyLogic and MicroPa k are trademarks of Fairchild Semico nductor Corporatio n.
© 2002 Fairchild Semiconductor Corporation DS500325 www.fairchildsemi.com
Logic Symbol
NC7SB3257
Pin Descriptions
Pin Names Description
, B
A, B
0
1
S Control Input
Function Table
Input (S) Function
LB
HB
H = HIGH Logic Level
L = LOW Logic Level
Data Ports
Connected to A
0
Connected to A
1
Connection Diagrams
Pin Assignments for SC70
(Top View)
Pin One Orientation Diagram
AAA = Product Code Top Mark - see ordering code
Note: Orientation of Top Mark determines Pin One location. Read the top
product code mark lef t to right, Pin One is the lo w er left pin (see diagram ).
Pad Assignments for MicroPak
www.fairchildsemi.com 2
(Top Thru View)
Absolute Maximum Ratings(Note 1) Recommended Operating
Supply Voltage (VCC) −0.5V to +7.0V
DC Switch Voltage (V
DC Output Voltage (V
DC Input Diode Current (I
@ (I
) VIN < 0V −50 mA
IK
DC Output Current (I
or Ground Current (ICC/I
DC V
CC
Storage Temperature Range (T
Junction Lead Temperature under Bias (T
Lead Temperature (T
(Soldering, 10 seconds)
Power Dissipation (P
) −0.5V to +7.0V
S
) −0.5V to +7.0V
IN
)
IK
) 128 mA
OUT
L
)
) ±100 mA
GND
) −65°C to +150°C
STG
) +150°C
J
+260°C
) @ +85°C180 mW
D
Conditions
Supply Voltage Operating (V
Control Input Voltage (V
Switch Input Voltage (VIN)0V to V
Output Voltage (V
Operating Temperature (TA) −40°C to +85°C
Input Rise and Fall Time (t
Control Input V
Thermal Resistance (
Note 1: Absolute maximum ratings are DC values beyond which t he devi ce
may be damag ed or hav e it s usefu l li fe i mpa ired. Th e da tas heet sp ecific ations 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 mu s t 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 ou t put diode curr ent ratings ar e observed.
(Note 2)
) 4.0V to 5.5V
CC
)0V to V
IN
)0V to V
OUT
, tf)
r
= 4.0V to 5.5V 0 ns/V to 5 ns/V
CC
θ
)350°C/W
JA
DC Electrical Characteristics
V
Symbol Parameter
V
IK
V
IH
V
IL
I
IN
I
OFF
R
ON
I
CC
∆I
CC
Note 4: Measured by the voltag e drop bet ween A and B pins at the indic ated cu rrent th rough th e switch. On Resis tance is determin ed by the lower of the
voltages on the two (A or B Ports).
Note 5: Per TTL driven Input (V
Clamp Diode Voltage 4.5 −1.2 V IIN = −18 mA
HIGH Level Input Voltage 4.5 − 5.5 2.0 V
LOW Level Input Voltage 4.5 − 5.5 0.8
Input Leakage Current 5.5 ±1 µA0 ≤ VIN ≤ 5.5V
OFF State Leakage Current 5.5 ±1 µA0 ≤ A, B ≤ V
Switch ON Resistance (Note 4) 4.5 3 7 Ω VIN = 0V, IIN = 64 mA
Quiescent Supply Current 5.5 10 µAVIN = VCC or GND
Increase in ICC Per Input (Note 5) 5.5 0.9 2.5 mA VIN = 3.4V, IO = 0
= 3.4V, Control input only). A and B pins do not contribute to ICC.
IN
CC
(V) Min Typ Max
4.5 3 7 Ω V
4.5 6 15 Ω V
4.0 10 20 Ω VIN = 2.4V, IIN = 15 mA
TA = −40°C to +85°C
Units Conditions
CC
= 0V, IIN = 30 mA
IN
= 2.4V, IIN = 15 mA
IN
= 0
I
OUT
Control Input Only
NC7SB3257
CC
CC
CC
3 www.fairchildsemi.com
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