Fairchild NC7WB3306 Tinylogic uhs 2-bit low power bus switch Datasheet

Revised September 2003
NC7WB3306
TinyLogic UHS 2-Bit Low Power Bus Switch
General Description
Features
The NC7WB3306 is a 2-bit ultra high-speed CMOS FET
bus switch with TTL-compatible active LOW control inputs.
The low On Resistance of the switch allows inputs to be
connected to outputs with minimal propagation delay and
without generating additional ground bounce noise. The
device is organized as a 2-bit switch with independent bus
enable (OE) controls. When OE is LOW, the switch is ON
and Port A is connected to Port B. When OE is HIGH, the
switch is OPEN and a high-impedance state exists
between the two ports. Control inputs tolerate voltages up
to 5.5V independent of VCC.
■ Space saving US8 surface mount package
■ MicroPak leadless package
■ Typical 3Ω switch resistance at 5.0V VCC
■ Minimal propagation delay through the switch
■ Power down high impedance input/output
■ Zero bounce in flow through mode.
■ TTL compatible active LOW control inputs
■ Control inputs are overvoltage tolerant
Ordering Code:
Product
Order
Number
Package
Code
Package Description
Supplied As
Number Top Mark
NC7WB3306K8X MAB08A
WB06
NC7WB3306L8X MAC08A
U3
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
TinyLogic is a registered trademark of Fairchild Semiconductor Corporation.
MicroPak is a trademark of Fairchild Semiconductor Corporation.
© 2003 Fairchild Semiconductor Corporation
DS500377
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NC7WB3306 TinyLogic UHS 2-Bit Low Power Bus Switch
May 2000
NC7WB3306
Logic Symbol
Connection Diagrams
(Top View)
Pin One Orientation Diagram
Pin Descriptions
Pin Name
Description
A
Bus A
B
Bus B
OE
Bus Enable 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
Pad Assignments for MicroPak
Bus Enable Input OE
Function
L
B Connected to A
H
Disconnected
H = HIGH Logic Level
L = LOW Logic Level
(Top Thru View)
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2
Recommended Operating
Conditions (Note 3)
Supply Voltage (VCC)
−0.5V to +7.0V
DC Switch Voltage (VS)
−0.5V to +7.0V
Supply Operating (VCC)
DC Output Voltage (VIN) (Note 2)
−0.5V to +7.0V
Control Input Voltage (VIN)
0V to 5.5V
Switch Input Voltage (VIN)
0V to 5.5V
DC Input Diode Current
(IIK) VIN < 0V
DC Output (IOUT) Current
Storage Temperature Range (TSTG)
−50 mA
Output Voltage (VOUT)
128 mA
Operating Temperature (TA)
±100 mA
DC VCC or Ground Current (ICC/GND)
0V to 5.5V
−40°C to +85°C
Input Rise and Fall Time (tr, tf)
−65°C to +150°C
Control Input
+150°C
Junction Lead Temperature under Bias (TJ)
4.0V to 5.5V
0 ns/V to 5 ns/V
Switch I/O
0 ns/V to DC
Thermal Resistance (θJA)
Lead Temperature (TL)
250 °C/W
+260°C
(Soldering, 10 seconds)
Power Dissipation (PD) @ +85°C
250 mW
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 logic inputs must be held HIGH or LOW. They may not
float.
DC Electrical Characteristics
Symbol
Parameter
TA = −40°C to +85°C
VCC
(V)
Min
Typ
Max
−1.2
VIK
Clamp Diode Voltage
VIH
HIGH Level Input Voltage
4.0 to 5.5
VIL
LOW Level Input Voltage
4.0 to 5.5
VOH
HIGH Level Output Voltage
4.5 to 5.5
IIN
Input Leakage Current
5.5
IOFF
Switch OFF Leakage Current
5.5
RON
Switch On Resistance
4.5
3
7
(Note 4)
4.5
3
7
4.5
6
15
4.0
10
20
4.5
ICC
Quiescent Supply Current
5.5
∆ICC
Increase in ICC per Input
5.5
2.0
Units
V
Conditions
IIN = −18 mA
V
0.8
V
V
VIN = VCC
±1.0
µA
0 ≤ VIN ≤ 5.5V
±1.0
µA
0 ≤ A, B, ≤ VCC
see Figure 3
VIN = 0V, IIN = 64 mA
Ω
VIN = 0V, IIN = 30 mA
VIN = 2.4V, IIN = 15 mA
VIN = 2.4V, IIN = 15 mA
3
µA
VIN = VCC or GND,
2.5
mA
VIN = 3.4V, IO = 0,
IOUT = 0
1
(Note 5)
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) pins.
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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NC7WB3306
Absolute Maximum Ratings(Note 1)
NC7WB3306
AC Electrical Characteristics
TA = −40°C to +85°C
Symbol
CL = 50 pF, RU = RD = 500Ω
VCC
Parameter
(V)
tPHL,
Propagation Delay Bus-to-Bus
tPLH
(Note 6)
tPZL,
Output Enable Time
Output Disable Time
Typ
4.0 to 5.5
0.25
0.8
2.5
4.2
4.0
0.8
3.0
4.6
4.5 to 5.5
0.8
3.1
4.8
4.0
0.8
2.9
4.4
tPHZ
Units
Conditions
Max
4.5 to 5.5
tPZH
tPLZ,
Min
Figure
Number
ns
ns
VI = OPEN
Figures
1, 2
VI = 7V for tPZL
Figures
1, 2
VI = 0V for tPZH
VI = 7V for tPLZ
ns
Figures
1, 2
VI = 0V for tPHZ
Note 6: This parameter is guaranteed. The bus switch contributes no propagation delay other than the RC delay of the typical On Resistance of the switch
and the 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance). The specified limit is calculated on this basis.
Capacitance
Symbol
Parameter
Typ
Max
2.5
Units
pF
Conditions
VCC = 0V
CIN
Control Pin Input Capacitance
CI/O (OFF)
Port OFF Capacitance
6
pF
VCC = 5.0V = OE
CI/O (ON)
Switch ON Capacitance
12
pF
VCC = 5.0V, OE = 0V
AC Loading and Waveforms
Input driven by 50Ω source terminated in 50Ω.
CL includes load and stray capacitance.
Input PRR = 1.0 MHz tw = 500 ns.
FIGURE 1. AC Test Circuit
FIGURE 2. AC Waveforms
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NC7WB3306
DC Characteristics
FIGURE 3. Typical High Level Output Voltage vs. Supply Voltage
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NC7WB3306
Tape and Reel Specification
TAPE FORMAT for US8
Package
Tape
Number
Cavity
Section
Cavities
Status
Status
Leader (Start End)
125 (typ)
Empty
Sealed
Designator
K8X
Cover Tape
Carrier
250
Filled
Sealed
Trailer (Hub End)
75 (typ)
Empty
Sealed
Cover Tape
TAPE DIMENSIONS inches (millimeters)
TAPE FORMAT for MicroPak
Package
Designator
L8X
Tape
Number
Cavity
Section
Cavities
Status
Status
Leader (Start End)
125 (typ)
Empty
Sealed
Carrier
250
Filled
Sealed
Trailer (Hub End)
75 (typ)
Empty
Sealed
TAPE DIMENSIONS inches (millimeters)
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NC7WB3306
Tape and Reel Specification
(Continued)
REEL DIMENSIONS inches (millimeters)
Tape
Size
8 mm
A
B
C
D
N
W1
W2
W3
7.0
0.059
0.512
0.795
2.165
0.331 + 0.059/−0.000
0.567
W1 + 0.078/−0.039
(177.8)
(1.50)
(13.00)
(20.20)
(55.00)
(8.40 + 1.50/−0.00)
(14.40)
(W1 + 2.00/−1.00)
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NC7WB3306
Physical Dimensions inches (millimeters) unless otherwise noted
8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide
Package Number MAB08A
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NC7WB3306 TinyLogic UHS 2-Bit Low Power Bus Switch
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
8-Lead MicroPak, 1.6 mm Wide
Package Number MAC08A
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
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 THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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