Fairchild Semiconductor NC7WB3306 Datasheet
NC7WB3306
NC7WB3306 TinyLogic
May 2000
Revised September 2003
TinyLogic
General Description
The NC7WB3306 is a 2-bit ultra high-spee d 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 wi th minimal propagation de lay and
without generating additional ground bounce noise. The
device is organized a s a 2-b it switch with indepe ndent b us
enable (OE
and Port A is connected to Port B. Whe n OE
switch is OPEN and a high-impedance state exists
between the two ports. C ontrol inputs t olerate voltages up
to 5.5V independent of V
UHS 2-Bit Low Power Bus Switch
) controls. When OE is LOW, the switch is ON
.
CC
is HIGH, the
Features
■ Space saving US8 surface mount package
■ MicroPak
■ Typical 3
■ 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
leadless package
Ω switch resistance at 5.0V V
CC
Ordering Code:
Product
Package Description Supplied AsOrder Package Code
Number Number Top Mark
NC7WB3306K8X MAB08A WB06 8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide 3k Units on Tape and Reel
NC7WB3306L8X MAC08A U3 8-Lead MicroPak, 1.6 mm Wide 5k Units on Tape and Reel
UHS 2-Bit Low Power Bus Switch
TinyLogic is a registered trademark of Fairchild Semico nductor Corporati on.
MicroPak is a tradem ark of Fairchild Semiconductor Corporation.
© 2003 Fairchild Semiconductor Corporation DS500377 www.fairchildsemi.com
Logic Symbol
NC7WB3306
Pin Descriptions
Pin Name Description
ABus A
BBus B
OE
Function Table
Bus Enable Input OE
L B Connected to A
H = HIGH Logic Level
L = LOW Logic Level
H Disconnected
Bus Enable Input
Function
Connection Diagrams
(Top View)
Pin One Orientation Diagram
AAA represents Product Code Top Mark - see ordering cod e
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 (VS)
DC Output Voltage (V
) (Note 2) −0.5V to +7.0V
IN
−0.5V to +7.0V
DC Input Diode Current
) VIN < 0V −50 mA
(I
IK
DC Output (I
DC V
CC
Storage Temperature Range (T
Junction Lead Temperature under Bias (T
Lead Temperature (T
(Soldering, 10 seconds)
Power Dissipation (P
) Current 128 mA
OUT
or Ground Current (ICC/GND) ±100 mA
) −65°C to +150°C
STG
)
L
) +150°C
J
+260°C
) @ +85°C250 mW
D
Conditions
Supply Operating (V
Control Input Voltage (V
Switch Input Voltage (V
Output Voltage (V
Operating Temperature (T
Input Rise and Fall Time (t
Control Input 0 ns/V to 5 ns/V
Switch I/O 0 ns/V to DC
Thermal Resistance (
Note 1: The “Absolute Maxi mum Ratings ” are those val ues beyond w hich
the safety of the d evice cannot b e guaranteed . The device sh ould not be
operated at these limit s. The parametric values defi ned in the Electrical
Characteristics tab les are not guaranteed a t t he absolute maximum rat ings.
The “Recommend ed O peratin g Cond itions” t able w ill defin e the condition s
for actual device operation.
Note 2: 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 3: Unused logic inputs must be held HIGH or LOW. They may not
float.
(Note 3)
) 4.0V to 5.5V
CC
) 0V to 5.5V
IN
) 0V to 5.5V
IN
) 0V to 5.5V
OUT
) −40°C to +85°C
A
, tf)
r
θ
) 250°C/W
JA
DC Electrical Characteristics
V
Symbol Parameter
V
V
V
V
I
I
R
I
∆I
Clamp Diode Voltage 4.5 −1.2 V IIN = −18 mA
IK
HIGH Level Input Voltage 4.0 to 5.5 2.0 V
IH
LOW Level Input Voltage 4.0 to 5.5 0.8 V
IL
HIGH Level Output Voltage 4.5 to 5.5 see Figure 3 V VIN = V
OH
Input Leakage Current 5.5 ±1.0 µA0 ≤ VIN ≤ 5.5V
IN
Switch OFF Leakage Current 5.5 ±1.0 µA0 ≤ A, B, ≤ V
OFF
Switch On Resistance 4.5 3 7
ON
(Note 4) 4.5 3 7 VIN = 0V, IIN = 30 mA
Quiescent Supply Current 5.5 3 µAVIN = VCC or GND,
CC
Increase in ICC per Input 5.5 1 2.5 mA VIN = 3.4V, IO = 0,
CC
(Note 5) Control Input Only
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) pins.
Note 5: Per TTL driven input (V
= 3.4V, control input only). A and B pins do not contribute to I
IN
CC
(V) Min Typ Max
4.5 6 15 V
4.0 10 20 V
TA = −40°C to +85°C
CC.
Units Conditions
CC
VIN = 0V, IIN = 64 mA
Ω
I
CC
= 2.4V, IIN = 15 mA
IN
= 2.4V, IIN = 15 mA
IN
= 0
OUT
NC7WB3306
3 www.fairchildsemi.com
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