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NC7WB3306 2-Bit Low Power Bus Switch
May 2000 Revised December 2005
NC7WB3306 2-Bit Low Power Bus Switch
General Description
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 2bit 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.
Features O Space saving US8 surface mount package O MicroPak Pb-Free leadless package O Typical 3: switch resistance at 5.0V VCC O Minimal propagation delay through the switch O Power down high impedance input/output O Zero bounce in flow through mode. O TTL compatible active LOW control inputs O Control inputs are overvoltage tolerant
Ordering Code:
Product Package Code Number Top Mark
MAB08A MAC08A WB06 U3
Order Number
NC7WB3306K8X NC7WB3306L8X
Package Description
Supplied As
8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide 3k Units on Tape and Reel Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5k Units on Tape and Reel
Pb-Free package per JEDEC J-STD-020B.
MicroPak is a trademark of Fairchild Semiconductor Corporation.
(c) 2005 Fairchild Semiconductor Corporation
DS500377
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NC7WB3306
Logic Symbol
Connection Diagrams
(Top View)
Pin Descriptions
Pin Name
A B OE
Pin One Orientation Diagram
Description
Bus A Bus B Bus Enable Input
Function Table
Bus Enable Input OE
L H
H HIGH Logic Level L LOW Logic Level
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
B Connected to A Disconnected
Pad Assignments for MicroPak
(Top Through View)
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NC7WB3306
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC) DC Switch Voltage (VS) DC Output Voltage (VIN) (Note 2) DC Input Diode Current (IIK) VIN 0V DC Output (IOUT) Current DC VCC or Ground Current (ICC/GND) Storage Temperature Range (TSTG) Junction Lead Temperature under Bias (TJ) Lead Temperature (TL) Power Dissipation (PD) @ 85qC (Soldering, 10 seconds)
0.5V to 7.0V 0.5V to 7.0V 0.5V to 7.0V 50 mA r100 mA 65qC to 150qC 150qC 260qC
250 mW 128 mA
Recommended Operating Conditions (Note 3)
Supply Operating (VCC) Control Input Voltage (VIN) Switch Input Voltage (VIN) Output Voltage (VOUT) Operating Temperature (TA) Input Rise and Fall Time (tr, tf) Control Input Switch I/O Thermal Resistance (TJA) 0 ns/V to 5 ns/V 0 ns/V to DC 250qC/W 4.0V to 5.5V 0V to 5.5V 0V to 5.5V 0V to 5.5V
40qC to 85qC
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 VIK VIH VIL VOH IIN IOFF RON Parameter Clamp Diode Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage Input Leakage Current Switch OFF Leakage Current Switch On Resistance (Note 4) VCC (V) 4.5 4.0 to 5.5 4.0 to 5.5 4.5 to 5.5 5.5 5.5 4.5 4.5 4.5 4.0 ICC Quiescent Supply Current Increase in ICC per Input (Note 5) 5.5 5.5 1.0 3.0 3.0 6.0 10.0 see Figure 3 2.0 0.8 Min TA
40qC to 85qC
Typ Max
Units
Conditions IIN
1.2
V V V V
18 mA
r1.0 r1.0
7.0 7.0 15.0 20.0 3.0 2.5
PA PA : PA
mA
VIN
0 d VIN d 5.5V VIN VIN 0V, IIN 0V, IIN 2.4V, IIN 2.4V, IIN 0 3.4V, IO
VCC
0 d A, B, d VCC 64 mA 30 mA 15 mA 15 mA
VIN VIN VIN IOUT VIN
VCC or GND, 0,
'ICC
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
AC Electrical Characteristics
TA Symbol Parameter VCC (V) tPHL, tPLH tPZL, tPZH tPLZ, tPHZ Output Disable Time Propagation Delay Bus-to-Bus (Note 6) Output Enable Time 4.5 to 5.5 4.0 4.5 to 5.5 4.0 0.8 0.8 0.8 0.8 2.5 3.0 3.1 2.9 4.2 4.6 4.8 4.4 ns ns VI VI VI VI 7V for tPZL 0V for tPZH 7V for tPLZ 0V for tPHZ 4.0 to 5.5 CL Min
40qC to 85qC
RD 500: Max 0.25 ns VI OPEN Units Conditions Figure Number Figures 1, 2 Figures 1, 2 Figures 1Figure 2 Typ
50 pF, RU
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 CIN CI/O (OFF) CI/O (ON) Parameter Control Pin Input Capacitance Port OFF Capacitance Switch ON Capacitance Typ 2.5 6.0 12.0 Max Units pF pF pF VCC VCC VCC 0V 5.0V OE 0V Conditions
5.0V, OE
AC Loading and Waveforms
Input driven by 50: source terminated in 50:. 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 Designator
K8X
Tape Section
Leader (Start End) Carrier Trailer (Hub End)
Number Cavities
125 (typ) 250 75 (typ)
Cavity Status
Empty Filled Empty
Cover Tape Status
Sealed Sealed Sealed
TAPE DIMENSIONS inches (millimeters)
TAPE FORMAT for MicroPak
Package Designator
L8X
Tape Section
Leader (Start End) Carrier Trailer (Hub End)
Number Cavities
125 (typ) 250 75 (typ)
Cavity Status
Empty Filled Empty
Cover Tape Status
Sealed Sealed Sealed
TAPE DIMENSIONS inches (millimeters)
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NC7WB3306
REEL DIMENSIONS inches (millimeters)
Tape Size
8 mm
A
7.0 (177.8)
B
0.059 (1.50)
C
0.512 (13.00)
D
0.795 (20.20)
N
2.165 (55.00)
0.331 0.059/0.000 (8.40 1.50/0.00)
W1
W2
0.567 (14.40)
W1 0.078/0.039 (W1 2.00/1.00)
W3
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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
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Pb-Free 8-Lead MicroPak, 1.6 mm Wide Package Number MAC08A
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NC7WB3306 2-Bit Low Power Bus Switch DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
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 FAIRCHILD SEMICONDUCTOR CORPORATION As used herein: provided in the labeling, can be reasonably expected to result in significant injury to the user. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or 2. A critical component is any component of a life support (b) support or sustain life, or (c) whose failure to perform device or system whose failure to perform can be reasonwhen properly used in accordance with instructions for use ably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of terms
Datasheet Identification Product Status
Advance Information Preliminary Formative or In Design First Production
Definition
This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only.
No Identification Needed
Full Production
Obsolete
Not In Production
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