SCDS128A − SEPTEMBER 2003 − REVISED OCTOBER 2003
D Undershoot Protection for Off-Isolation on
D Data I/Os Support 0 to 5-V Signaling Levels
A and B Ports Up To −2 V
Integrated Diode to VCC Provides 5-V Input
Down To 3.3-V Output Level Shift
Bidirectional Data Flow, With Near-Zero
Propagation Delay
Low ON-State Resistance (ron)
Characteristics (ron = 3 Ω Typical)
Low Input/Output Capacitance Minimizes
Loading and Signal Distortion
(Cio(OFF) = 5 pF Typical)
Data and Control Inputs Provide
Undershoot Clamp Diodes
VCC Operating Range From 4.5 V to 5.5 V
(0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, 5-V)
Control Inputs Can be Driven by TTL or
5-V/3.3-V CMOS Outputs
Ioff Supports Partial-Power-Down Mode
Operation
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Performance Tested Per JESD 22
− 2000-V Human-Body Model
(A114-B, Class II)
− 1000-V Charged-Device Model (C101)
Supports Both Digital and Analog
Applications: USB Interface, Memory
Interleaving, Bus Isolation, Low-Distortion
Signal Gating
D
D
D
D
D
D
D
D
D
D
D
D OR PW PACKAGE
(TOP VIEW)
1OE
1A
1B
GND
1
8
2
7
3
6
4
5
VCC
2OE
2B
2A
description/ordering information
The SN74CBTD3306C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron),
allowing for minimal propagation delay. This device features an integrated diode in series with VCC to provide
level shifting for 5-V input down to 3.3-V output levels. Active Undershoot-Protection Circuitry on the A and B
ports of the SN74CBTD3306C provides protection for undershoot up to −2 V by sensing an undershoot event
and ensuring that the switch remains in the proper OFF state.
The SN74CBTD3306C is organized as two 1-bit bus switches with separate output-enable (1OE, 2OE) inputs.
It can be used as two 1-bit bus switches or as one 2-bit bus switch. When OE is low, the associated 1-bit bus
switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When
OE is high, the associated 1-bit bus switch is OFF, and a high-impedance state exists between the A and B ports.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
PACKAGE†
TA
SOIC − D
−40°C to 85°C
TSSOP − PW
TOP-SIDE
MARKING
Tube
SN74CBTD3306CD
Tape and reel
SN74CBTD3306CDR
Tube
SN74CBTD3306CPW
Tape and reel
SN74CBTD3306CPWR
CC306C
CC306C
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2003, Texas Instruments Incorporated
!"#$%! & '("")% $& ! *(+,'$%! -$%).
"!-('%& '!!"# %! &*)''$%!& *)" %/) %)"#& ! )0$& &%"(#)%&
&%$-$"- 1$""$%2. "!-('%! *"!')&&3 -!)& !% )')&&$",2 ',(-)
%)&%3 ! $,, *$"$#)%)"&.
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1
SCDS128A − SEPTEMBER 2003 − REVISED OCTOBER 2003
description/ordering information (continued)
This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that
damaging current will not backflow through the device when it is powered down. The device has isolation during
power off.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
FUNCTION TABLE
(each bus switch)
INPUT
OE
INPUT/OUTPUT
A
FUNCTION
L
B
A port = B port
H
Z
Disconnect
logic diagram (positive logic)
3
2
1A
1OE
1B
SW
1
5
6
2A
SW
2B
7
2OE
simplified schematic, each FET switch (SW)
A
B
Undershoot
Protection Circuit
EN†
† EN is the internal enable signal applied to the switch.
2
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SCDS128A − SEPTEMBER 2003 − REVISED OCTOBER 2003
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Control input voltage range, VIN (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Switch I/O voltage range, VI/O (see Notes 1, 2, and 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Control input clamp current, IIK (VIN < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA
I/O port clamp current, II/OK (VI/O < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA
ON-state switch current, II/O (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±128 mA
Continuous current through VCC or GND terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
Package thermal impedance, θJA (see Note 5): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltages are with respect to ground unless otherwise specified.
2. The input and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
3. VI and VO are used to denote specific conditions for VI/O.
4. II and IO are used to denote specific conditions for II/O.
5. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Notes 6 and 7)
MIN
MAX
4.5
5.5
V
High-level control input voltage
2
5.5
V
Low-level control input voltage
0
0.8
V
Data input/output voltage
0
5.5
V
VCC
VIH
Supply voltage
VIL
VI/O
UNIT
TA
Operating free-air temperature
−40
85
°C
NOTES: 6. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application
report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
7. In applications with fast edge rates, multiple outputs switching, and operating at high frequencies, the output may have little or no
level-shifting effect.
POST OFFICE BOX 655303
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3
SCDS128A − SEPTEMBER 2003 − REVISED OCTOBER 2003
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VIK
Control inputs
VCC = 4.5 V,
VIKU
Data inputs
VCC = 5 V,
VOH
IIN
Control inputs
IIN = −18 mA
0 mA > II ≥ −50 mA,
VIN = VCC or GND,
MIN
TYP†
Switch OFF
MAX
UNIT
−1.8
V
−2
V
±1
µA
±10
µA
See Figures 4 and 5
VCC = 5.5 V,
IOZ‡
VCC = 5.5 V,
Ioff
VCC = 0,
ICC
VCC = 5.5 V,
VIN = VCC or GND
VO = 0 to 5.5 V,
VI = 0,
Switch OFF,
VIN = VCC or GND
VO = 0 to 5.5 V,
II/O = 0,
VIN = VCC or GND,
VI = 0
10
µA
Switch ON or OFF
1.5
mA
VCC = 5.5 V,
VIN = 3 V or 0
One input at 3.4 V,
Other inputs at VCC or GND
2.5
mA
Cio(OFF)
VI/O = 3 V or 0,
Switch OFF,
Cio(ON)
VI/O = 3 V or 0,
Switch ON,
ron¶
VCC = 4.5 V
VI = 0
IO = 64 mA
IO = 30 mA
∆ICC§
Cin
Control inputs
Control inputs
3.5
pF
VIN = VCC or GND
5
pF
VIN = VCC or GND
12.5
pF
3
6
3
6
Ω
VI = 2.4 V,
IO = −15 mA
9
20
VIN and IIN refer to control inputs. VI, VO, II, and IO refer to data pins.
† All typical values are at VCC = 5 V (unless otherwise noted), TA = 25°C.
‡ For I/O ports, the parameter IOZ includes the input leakage current.
§ This is the increase in supply current for each input that is at the specified voltage level, rather than VCC or GND.
¶ Measured by the voltage drop between the A and B terminals at the indicated current through the switch. ON-state resistance is determined by
the lower of the voltages of the two (A or B) terminals.
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 3)
PARAMETER
tpd#
ten
FROM
(INPUT)
TO
(OUTPUT)
A or B
B or A
OE
A or B
VCC = 5 V
± 0.5 V
MIN
1.5
UNIT
MAX
0.15
ns
4.7
ns
tdis
A or B
1.5
4.7
ns
OE
# The propagation delay is the calculated RC time constant of the typical ON-state resistance of the switch and the specified load capacitance,
when driven by an ideal voltage source (zero output impedance).
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SCDS128A − SEPTEMBER 2003 − REVISED OCTOBER 2003
undershoot characteristics (see Figures 1 and 2)
PARAMETER
TEST CONDITIONS
VOUTU
VCC = 5.5 V,
Switch OFF,
† All typical values are at VCC = 5 V (unless otherwise noted), TA = 25°C.
VCC
Input
Generator
Ax
VS
DUT
TYP†
2
VOH−0.3
VIN = VCC or GND
MAX
UNIT
V
11 V
Input
(Open
Socket)
100 kΩ
50 Ω
MIN
Bx
100 kΩ
90 %
2 ns
10 %
−2 V
20 ns
Output
(VOUTU)
POST OFFICE BOX 655303
5.5 V
2 ns
10 %
10 pF
Figure 1. Device Test Setup
90 %
VOH
VOH − 0.3
Figure 2. Transient Input Voltage (VI) and Output
Voltage (VOUTU) Waveforms
(Switch OFF)
• DALLAS, TEXAS 75265
5
SCDS128A − SEPTEMBER 2003 − REVISED OCTOBER 2003
PARAMETER MEASUREMENT INFORMATION
FOR LEVEL SHIFTER
VCC
Input Generator
VIN
50 Ω
50 Ω
VG1
TEST CIRCUIT
DUT
7V
Input Generator
S1
RL
VO
VI
GND
50 Ω
50 Ω
VG2
CL
(see Note A)
RL
VCC
S1
RL
VI
CL
tpd(s)
5 V ± 0.5 V
Open
500 Ω
VCC or GND
50 pF
tPLZ/tPZL
5 V ± 0.5 V
7V
500 Ω
GND
50 pF
0.3 V
tPHZ/tPZH
5 V ± 0.5 V
Open
500 Ω
VCC
50 pF
0.3 V
TEST
Output
Control
(VIN)
V∆
3V
1.5 V
3V
1.5 V
1.5 V
0V
tPLH
VOH
Output
1.5 V
Output
Waveform 1
S1 at 7 V
(see Note B)
tPLZ
3.5 V
1.5 V
tPZH
tPHL
1.5 V
VOL
Output
Waveform 2
S1 at Open
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES (tpd(s))
1.5 V
0V
tPZL
Output
Control
(VIN)
Open
VOL + V∆
VOL
tPHZ
1.5 V
VOH − V∆
VOH
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd(s). The tpd propagation delay is the calculated RC time constant of the typical ON-state
resistance of the switch and the specified load capacitance, when driven by an ideal voltage source (zero output impedance).
H. All parameters and waveforms are not applicable to all devices.
Figure 3. Test Circuit and Voltage Waveforms
6
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SCDS128A − SEPTEMBER 2003 − REVISED OCTOBER 2003
TYPICAL CHARACTERISTICS
OUTPUT VOLTAGE HIGH
vs
SUPPLY VOLTAGE
OUTPUT VOLTAGE HIGH
vs
SUPPLY VOLTAGE
4
3.25
100 µA
6 mA
12 mA
3.5
100 µA
3.25
6 mA
12 mA
3
24 mA
24 mA
3
2.75
2.5
2.25
2
1.75
1.5
4.5
TA = 25°C
VI = VCC
3.75
VOH − Output Voltage High − V
3.5
2.75
2.5
2.25
2
1.75
4.75
5
5.25
5.5
1.5
4.5
5.75
4.75
VCC − Supply Voltage − V
5
5.25
5.5
5.75
VCC − Supply Voltage − V
OUTPUT VOLTAGE HIGH
vs
SUPPLY VOLTAGE
4
TA = 0°C
VI = VCC
3.75
VOH − Output Voltage High − V
VOH − Output Voltage High − V
3.75
4
TA = 85°C
VI = VCC
3.5
100 µA
3.25
6 mA
12 mA
3
24 mA
2.75
2.5
2.25
2
1.75
1.5
4.5
4.75
5
5.25
5.5
5.75
VCC − Supply Voltage − V
Figure 4. VOH Values
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7
SCDS128A − SEPTEMBER 2003 − REVISED OCTOBER 2003
TYPICAL CHARACTERISTICS (continued)
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
3.5
VCC = 5 V
TA = 25°C
VO − Output Voltage − V
3
100 µA
6 mA
12 mA
24 mA
2.5
2
1.5
1
5
0
0
1
2
3
4
5
VI − Input Voltage − V
Figure 5. Data Output Voltage vs Data Input Voltage
8
POST OFFICE BOX 655303
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PACKAGE OPTION ADDENDUM
www.ti.com
25-Feb-2005
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
Lead/Ball Finish
MSL Peak Temp (3)
SN74CBTD3306CD
ACTIVE
SOIC
D
8
75
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
SN74CBTD3306CDR
ACTIVE
SOIC
D
8
2500
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
SN74CBTD3306CPW
ACTIVE
TSSOP
PW
8
150
Pb-Free
(RoHS)
CU NIPDAU
Level-1-250C-UNLIM
SN74CBTD3306CPWR
ACTIVE
TSSOP
PW
8
2000
Pb-Free
(RoHS)
CU NIPDAU
Level-1-250C-UNLIM
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional
product content details.
None: Not yet available Lead (Pb-Free).
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
MECHANICAL DATA
MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999
PW (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0,30
0,19
0,65
14
0,10 M
8
0,15 NOM
4,50
4,30
6,60
6,20
Gage Plane
0,25
1
7
0°– 8°
A
0,75
0,50
Seating Plane
0,15
0,05
1,20 MAX
PINS **
0,10
8
14
16
20
24
28
A MAX
3,10
5,10
5,10
6,60
7,90
9,80
A MIN
2,90
4,90
4,90
6,40
7,70
9,60
DIM
4040064/F 01/97
NOTES: A.
B.
C.
D.
All linear dimensions are in millimeters.
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion not to exceed 0,15.
Falls within JEDEC MO-153
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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