Fairchild Semiconductor NC7SB3257P6X Datasheet
NC7SB3257
NC7SB3257 TinyLogic
January 2000
Revised June 2000
TinyLogic
UHS Single 2-to-1
Multiplexer/Demultiplexer Bus Switc h
General Description
The NC7SB3257 is a high performance, 2-to-1 NMOS
passgate multiplexer/demultiplexer from Fairchild’s Ultra
High Speed Series of TinyLogic
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 V
operating range . The contr ol inpu t tol erates vo lt-
CC
ages up to 5.5V independent of the V
. The device is fab ricated
operating range.
CC
Ordering Code:
Order
Number
NC7SB3257P6X MAA06A B7B 6-Lead SC70, EIAJ SC88, 1.25mm Wide 3k Units on Tape and Reel
Package
Number
Product Code
Top Mark
Logic Symbol
Features
■ Space saving SC70 6-lead surface mount package
■ Typical 3
■ Minimal propagation delay through the switch
■ Power down high impedance cont rol input
■ 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
CC
Connection Diagram
UHS Single 2-to-1 Multiplexer/Demultiplexer Bus Switch
Pin Descriptions
Pin Names Description
, B
A, B
0
1
SEL Control Input
Data Ports
Pin One Orientation Diagram
(Top View)
Function Table
Input (SEL) Function
LB
HB
H = HIGH Logic Le v el
L = LOW Logic Level
TinyLogic is a trademark of Fairchild Semiconductor Co rporation.
© 2000 Fairchild Semiconductor Corporation DS500325 www.fairchildsemi.com
Connected to A
0
Connected to A
1
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 lower left pin (see diagram ).
Absolute Maximum Ratings(Note 1) Recommended Operating
Supply Voltage (VCC) −0.5V to +7.0V
DC Switch Voltage (V
DC Output Voltage (V
NC7SB3257
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
) −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
(Soldering, 10 seconds)
Power Dissipation (P
) @ +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 the devi ce
may be damage d or h ave its us eful life im pai red. Th e dat as heet sp ecific a-
+260°C
tions 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 no t recommend operation outsid e datasheet spec ifications.
Note 2: Control input must be held HIGH or LOW, it must not float.
Note 3: The input and output ne gative vo ltage ra tings may be excee ded if
the input and output diode current ratings are 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
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 Por t s).
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
CC
= 3.4V, Control input only). A and B pins do not c ontribute 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
CC
CC
CC
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AC Electrical Characteristics
= −40°C to +85°C
T
Symbol Parameter
A
CL = 50 pF, RU = RD =500Ω
CC
Units Conditions Fig. No.V
(V) Min Typ Max
t
PHL
t
PLH
t
PZL
t
PZH
t
PLZ
t
PHZ
t
B-M
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 idea l vo lt age source (zero out put impedance).
Note 7: Guaranteed by design.
Propagation Delay Bus to Bus 4.0 − 55 0.25
(Note 6)
Output Enable Time 4.5 − 5.5 1.8 6.5
4.0 1.8 7.3 VI = 0V for t
ns V
ns
= OPEN
I
VI = 7V for t
Output Disable Time 4.5 − 5.5 0.8 4.7 VI = 7V for t
4.0 0.8 5.3 VI = 0V for t
Break Before Make Time 4.5 − 5.5 0.5
(Note 7) 4.0 0.5
ns Figure 3
Figures 1,
PZL Figures 1,
PZH
PLZ Figures 1,
PHZ
Capacitance (Note 8)
Symbol Parameter Typ Max Units Conditions
C
IN
C
IO-B
CIO-A A Port ON Capacitance 16 pF VCC = 5.0V
Note 8: Capacitance is characterized but not tested.
Control Pin Input Capacitance 2.3 pF VCC = 0V
B Port OFF Capacitance 5.7 pF VCC = 5.0V
NC7SB3257
2
2
2
3 www.fairchildsemi.com
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