NC7WB66 TinyLogic Low Voltage UHS Dual SPST Normally Open Bus Switch
May 2000
Revised August 2003
NC7WB66
TinyLogic
Low Voltage UHS Dual SPST
Normally Open Bus Switch
General Description
The NC7WB66 is an ultra high-speed (UHS) dual single-
pole/single-throw (SPST) bus switch. The device is fabri-
cated with advanced sub-micron CMOS technology to
achieve high speed enable and disable times and low On
Resistance over a broad V
CC
range. The device is speci-
fied to operate over the 1.65 to 5.5V V
CC
operating range.
The device is organized as a dual switch with independent
CMOS compatible switch enable (OE) controls. When OE
is HIGH, the switch is ON and Port A is connected to Port
B. When OE is LOW, the switch is OPEN and a high-
impedance state exists between the two ports. The enable
inputs tolerate voltages up to 5.5V independent of the V
CC
operating range.
Features
s
Useful in both analog and digital applications
s
Space saving US8 surface mount package
s
MicroPak
leadless package
s
Typical 7
Ω
On Resistance @ 5V V
CC
s
Broad V
CC
operating range: 1.65V to 5.5V
s
Rail-to-rail signal handling
s
Power down high impedance control inputs
s
Control inputs are overvoltage tolerant
s
Control inputs are CMOS compatible
Ordering Code:
Product
Order
Number
Package
Code
WB66
P4
Package Description
Supplied As
Number Top Mark
8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide 3K Units on Tape and Reel
8-Lead MicroPak, 1.6 mm Wide
5K Units on Tape and Reel
NC7WB66K8X MAB08A
NC7WB66L8X MAC08A
TinyLogic is a registered trademark of Fairchild Semiconductor Corporation.
MicroPak is a trademark of Fairchild Semiconductor Corporation.
© 2003 Fairchild Semiconductor Corporation
DS500373
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NC7WB66
Logic Symbol
Connection Diagrams
(Top View)
Pin One Orientation Diagram
Pin Descriptions
Pin Names
A
B
OE
Description
Switch Port A
Switch Port B
Control Input
AAA represents 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).
Function Table
Switch Enable Input (OE)
L
H
H
=
HIGH Logic Level
Function
Disconnect
B Connected to A
Pad Assignments for MicroPak
L
=
LOW Logic Level
(Top Through View)
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2
NC7WB66
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
CC
)
DC Switch Voltage (V
S
)
DC Input Voltage (V
IN
) (Note 2)
DC Input Diode Current
@ (I
IK
) V
IN
<
0V
DC Switch Output Current (I
OUT
)
DC V
CC
or Ground Current (I
CC
/I
GND
)
Storage Temperature Range (T
STG
)
Junction Lead Temperature
under Bias (T
J
)
Junction Lead Temperature (T
L
)
(Soldering, 10 Seconds)
Power Dissipation (P
D
) @
+
85
°
C
SC70-6
250 mW
−
0.5V to
+
7.0V
−
0.5V to V
CC
+
0.5V
−
0.5V to
+
7.0V
−
50 mA
±
128 mA
±
100 mA
−
65
°
C to
+
150
°
C
+
150
°
C
+
260
°
C
Recommended Operating
Conditions
(Note 3)
Supply Voltage (V
CC
)
Control Input Voltage (V
IN
)
Switch Input Voltage (V
IN
)
Switch Output Voltage (V
OUT
)
Operating Temperature (T
A
)
Input Rise and Fall Time (t
r
, t
f
)
Control Input V
CC
=
1.65V
−
2.7V
Control Input V
CC
=
3.0V
−
3.6V
Control Input V
CC
=
4.5V
−
5.5V
Thermal Resistance (
θ
JA
)
0 ns/V to 20 ns/V
0 ns/V to 10 ns/V
0 ns/V to 5 ns/V
250
°
C/W
1.65V to 5.5V
0V to 5.5V
0V to V
CC
0V to V
CC
−
40
°
C to
+
85
°
C
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.
DC Electrical Characteristics
Symbol
V
IH
V
IL
I
IN
I
OFF
R
ON
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
Input Leakage Current
Switch OFF Leakage Current
Switch ON Resistance
(Note 4)
4.5
V
CC
(V)
2.3–5.5
1.65–1.95
2.3–5.5
0–5.5
1.65–5.5
6
7
6
3.0
2.3
1.65
I
CC
Quiescent Supply Current
All Channels ON or OFF
Analog Signal Range
RRange
ON Resistance over
Signal Range
(Note 4)(Note 5)
∆R
ON
ON Resistance Match
Between Channels
(Note 4)(Note 7)
7.5
8.5
9
10.5
12.5
17
5.5
V
CC
4.5
3.0
2.3
1.65
4.5
3.0
2.3
1.65
0
8
15
45
150
0.2
0.2
0.5
0.6
Ω
Min
0.7 V
CC
0.25 V
CC
0.3 V
CC
±0.1
±0.1
10
13.5
10
15
15
20
20
30
30
1
V
CC
15
30
75
275
0
1.65–1.95 0.75 V
CC
T
A
= +25°C
Typ
Max
T
A
= −40°C
to
+85°C
Min
0.75 V
CC
0.7 V
CC
0.25V
CC
0.3 V
CC
±1.0
±1.0
10
13.5
10
15
15
20
20
30
30
10
V
CC
15
30
75
275
Ω
Ω
Ω
Ω
µA
V
I
O
= −30
mA, 0
≤
V
I
≤
V
CC
I
O
= −24
mA, 0
≤
V
I
≤
V
CC
I
O
= −8
mA, 0
≤
V
I
≤
V
CC
I
O
= −4
mA, 0
≤
V
I
≤
V
CC
I
O
= −30
mA, V
I
=
3.15
I
O
= −24
mA, V
I
=
2.1
I
O
= −8
mA, V
I
=
1.6
I
O
= −4
mA, V
I
=
1.15
Ω
Max
V
V
µA
µA
0
≤
V
IN
≤
5.5V
0
≤
A, B
≤
V
CC
V
I
=
0V, I
O
=
30 mA
V
I
=
2.4V, I
O
= −30
mA
V
I
=
4.5V, I
O
= −30
mA
V
I
=
0V, I
O
=
24 mA
V
I
=
3V, I
O
= −24
mA
V
I
=
0V, I
O
=
8 mA
V
I
=
2.3V, I
O
= −8
mA
V
I
=
0V, I
O
=
4 mA
V
I
=
1.65V, I
O
= −4
mA
V
IN
=
V
CC
or GND
I
OUT
=
0
Units
Conditions
3
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NC7WB66
DC Electrical Characteristics
Symbol
R
flat
Parameter
ON Resistance Flatness
(Note 4)(Note 5)(Note 6)
V
CC
(V)
4.5
3.0
2.3
1.65
(Continued)
T
A
= +25°C
T
A
= −40°C
to
+85°C
Max
6
17.5
60
250
Min
Max
6
17.5
60
250
I
O
= −30
mA, 0
≤
V
I
≤
V
CC
I
O
= −24
mA, 0
≤
V
I
≤
V
CC
I
O
= −8
mA, 0
≤
V
I
≤
V
CC
I
O
= −4
mA, 0
≤
V
I
≤
V
CC
Units
Conditions
Min
Typ
2.5
8
33
135
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) pins.
Note 5:
Guaranteed by design.
Note 6:
Flatness is defined as the difference between the minimum and maximum value of ON resistance over the specified range of conditions.
Note 7:
∆R
ON
=
R
ON
max
−
R
ON
min measured at identical V
CC
, temperature and voltage levels.
AC Electrical Characteristics
Symbol
t
PHL
, t
PLH
Parameter
Propagation Delay Bus to Bus
(Note 8)
V
CC
(V)
4.5–5.5
3.0–3.6
2.3–2.7
1.65–1.95
t
PZL
, t
PZH
Output Enable Time
Turn on Time
4.5–5.5
3.0–3.6
2.3–2.7
1.65–1.95
t
PLZ
, t
PHZ
Output Disable Time
Turn Off Time
4.5–5.5
3.0–3.6
2.3–2.7
1.65–1.95
0.8
1.2
1.5
2.5
0.8
1.5
2.0
3.0
T
A
= −40°C
to
+85°C
Min
Typ
0.35
0.7
1.1
2.0
2.0
2.5
3.2
5.7
2.6
3.4
4.2
6.2
Max
1.0
1.5
2.5
4.0
3.2
3.9
5.6
10
4.1
5.0
6.9
10.5
ns
V
I
=
0V for t
PHZ
V
I
=
2 x V
CC
for t
PLZ
C
L
=
50 pF, RU
=
RD
=
500Ω
Figures
2, 1
ns
V
I
=
0V for t
PZH
V
I
=
2 x V
CC
for t
PZL
C
L
=
50 pF, RU
=
RD
=
500Ω
Figures
2, 1
ns
V
I
=
OPEN
C
L
=
50 pF, RU
=
RD
=
500Ω
Figures
2, 1
Units
Conditions
Figure
Number
Note 8:
This parameter is guaranteed by design. The switch contributes no propagation delay other than the RC delay of the On resistance of the switch and
the 50 pF load capacitance.
Capacitance
Symbol
C
IN
C
I/O
(ON)
Parameter
Control Pin Input Capacitance
Switch Port Capacitance when Switch is Enabled
Typ
2.5
5
10
Max
Units
pF
pF
pF
V
CC
=
0V
V
CC
=
5.0V
V
CC
=
5.0V
Figure 3
Figure 4
Conditions
Figures
C
I/O
(OFF) Switch Port Off Capacitance
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4
NC7WB66
AC Loading and Waveforms
Input driven by 50Ω source terminated in 50Ω
C
L
includes load and stray capacitance.
Input PRR
=
1.0 MHz; t
w
=
500 ns
FIGURE 1. AC Test Circuit
FIGURE 2. AC Waveforms
FIGURE 3. Channel Off Capacitance
FIGURE 4. Channel On Capacitance
5
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