SN74CB3T1G125-Q1
SCDS319 – JUNE 2011
www.ti.com
SINGLE FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE SWITCH
WITH 5-V-TOLERANT LEVEL SHIFTER
Check for Samples: SN74CB3T1G125-Q1
FEATURES
1
•
•
•
•
•
•
•
•
•
Qualified for Automotive Applications
Output Voltage Translation Tracks VCC
Supports Mixed-Mode Signal Operation on All
Data I/O Ports
– 5-V Input Down to 3.3-V Output Level Shift
With 3.3-V VCC
– 5-V/3.3-V Input Down to 2.5-V Output Level
Shift With 2.5-V VCC
5-V-Tolerant I/Os, With Device Powered Up or
Powered Down
Bidirectional Data Flow With Near-Zero
Propagation Delay
Low ON-State Resistance (ron) Characteristics
(ron = 5 Ω Typ)
Low Input/Output Capacitance Minimizes
Loading (Cio(OFF) = 5 pF Typ)
Data and Control Inputs Provide Undershoot
Clamp Diodes
Low Power Consumption
(ICC = 20 μA Max)
•
•
•
•
•
•
VCC Operating Range From 2.3 V to 3.6 V
Data I/Os Support 0- to 5-V Signaling Levels
(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
Supports Digital Applications: Level
Translation, USB Interface, Bus Isolation
Ideal for Low-Power Portable Equipment
DESCRIPTION
The SN74CB3T1G125-Q1 is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron),
allowing for minimal propagation delay. The device fully supports mixed-mode signal operation on all data I/O
ports by providing voltage translation that tracks VCC. The SN74CB3T1G125-Q1 supports systems using 5-V
TTL, 3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels (see Figure 1).
The SN74CB3T1G125-Q1 is a 1-bit bus switch with a single ouput-enable (OE) input. When OE is low, the 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 bus switch is OFF, and a high-impedance state exists between the A and B ports.
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.
1
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated
SN74CB3T1G125-Q1
SCDS319 – JUNE 2011
www.ti.com
VCC
5.5 V
VCC
IN
≈VCC − 1 V
≈VCC
OUT
≈VCC − 1 V
CB3T
0V
0V
Input Voltages
Output Voltages
NOTE A: If the input high voltage (VIH) level is greater than or equal to VCC – 1 V, and less than or equal to 5.5 V, then the output high voltage
(VOH) level will be equal to approximately the VCC voltage level.
Figure 1. Typical DC Voltage Translation Characteristics
ORDERING INFORMATION
TA
–40°C to 125°C
(1)
(2)
PACKAGE (1)
SOT (SC-70) – DCK
ORDERABLE PART NUMBER
Reel of 3000
CCB3T1G125QDCKRQ1
TOP-SIDE MARKING (2)
72_
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
The actual top-side marking has one additional character that designates the assembly/test site.
FUNCTION TABLE
INPUT
OE
INPUT/OUTPUT
A
FUNCTION
L
B
A port = B port
H
Z
Disconnect
LOGIC DIAGRAM (POSITIVE LOGIC)
2
A
OE
2
4
SW
B
1
Copyright © 2011, Texas Instruments Incorporated
SN74CB3T1G125-Q1
SCDS319 – JUNE 2011
www.ti.com
SIMPLIFIED SCHEMATIC, EACH FET SWITCH (SW)
B
A
VG(1)
Control
Circuit
EN(2)
(1) Gate voltage (VG) is equal to approximately VCC + VT when the switch is ON
and VI > VCC + VT.
(2) EN is the internal enable signal applied to the switch.
ABSOLUTE MAXIMUM RATINGS (1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
–0.5
7
V
(3)
–0.5
7
V
(3) (4)
–0.5
7
V
VCC
Supply voltage range
VIN
Control input voltage range (2)
VI/O
Switch I/O voltage range (2)
IIK
Control input clamp current
VIN < 0
–50
mA
II/OK
I/O port clamp current
VI/O < 0
–50
mA
IIO
ON-state switch current (5)
±128
mA
Continuous current through VCC or GND
θJA
Package thermal impedance (6)
Tstg
Storage temperature range
(1)
(2)
(3)
(4)
(5)
(6)
DCK package
–65
±100
mA
252
°C/W
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.
All voltages are with respect to ground, unless otherwise specified.
The input and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
VI and VO are used to denote specific conditions for VI/O.
II and IO are used to denote specific conditions for II/O.
The package thermal impedance is calculated in accordance with JESD 51-7.
RECOMMENDED OPERATING CONDITIONS (1)
VCC
Supply voltage
VIH
High-level control input voltage
VIL
Low-level control input voltage
VI/O
Data input/output voltage
TA
Operating free-air temperature
(1)
MIN
MAX
2.3
3.6
VCC = 2.3 V to 2.7 V
1.7
5.5
VCC = 2.7 V to 3.6 V
2
5.5
VCC = 2.3 V to 2.7 V
0
0.7
VCC = 2.7 V to 3.6 V
0
0.8
UNIT
V
V
V
0
5.5
V
–40
125
°C
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.
Copyright © 2011, Texas Instruments Incorporated
3
SN74CB3T1G125-Q1
SCDS319 – JUNE 2011
www.ti.com
ELECTRICAL CHARACTERISTICS (1)
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VIK
VCC = 3 V, II = –18 mA
VOH
See Figure 3 and Figure 4
IIN
VCC = 3.6 V,
Switch ON,
VIN = VCC or GND
(3)
ICC
VCC = 3.6 V, II/O = 0,
Switch ON or OFF, VIN = VCC or GND
ΔICC
(4)
Cin
(1)
(2)
(3)
(4)
(5)
±10
μA
10
μA
VI = VCC or GND
20
VI = 5.5 V
20
300
μA
μA
3
pF
5
pF
VCC = 3.3 V, Switch ON,
VIN = VCC or GND
VI/O = 5.5 V or 3.3 V
VI/O = GND
12
VCC = 2.3 V, TYP at VCC = 2.5 V,
VI = 0
IO = 24 mA
5
10
IO = 16 mA
5
10
IO = 24 mA
5
9
IO = 16 mA
5
9
VCC = 3 V, VI = 0
μA
±5
VCC = 3.3 V, VI/O = 5.5 V, 3.3 V, or GND, Switch OFF, VIN = VCC or GND
(5)
μA
–40
Control inputs VCC = 3.3 V, VIN = VCC or GND
Cio(ON)
±10
VI = 0.7 V to VCC – 0.7 V
Control inputs VCC = 3 V to 3.6 V, One input at VCC – 0.6 V, Other inputs at VCC or GND
Cio(OFF)
V
±20
VCC = 3.6 V, VO = 0 to 5.5 V, VI = 0, Switch OFF, VIN = VCC or GND
VCC = 0, VO = 0 to 5.5 V, VI = 0
UNIT
–1.2
VI = VCC – 0.7 V to 5.5 V
VI = 0 to 0.7 V
Ioff
ron
TYP (2) MAX
Control inputs VCC = 3.6 V, VIN = 3.6 V to 5.5 V or GND
II
IOZ
MIN
4
pF
Ω
VIN and IIN refer to control inputs. VI, VO, II, and IO refer to data pins.
All typical values are at VCC = 3.3 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 TTL voltage level, rather than VCC or GND.
Measured by the voltage drop between 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 2)
FROM
(INPUT)
TO
(OUTPUT)
ten
OE
tdis
OE
PARAMETER
4
VCC = 2.5 V
± 0.2 V
VCC = 3.3 V
± 0.3 V
UNIT
MIN
MAX
MIN
MAX
A or B
1
10.5
1
9.5
ns
A or B
1
8.5
1
9
ns
Copyright © 2011, Texas Instruments Incorporated
SN74CB3T1G125-Q1
SCDS319 – JUNE 2011
www.ti.com
PARAMETER MEASUREMENT INFORMATION
VCC
Input Generator
VIN
50 W
50 W
VG1
TEST CIRCUIT
DUT
2 x VCC
Input Generator
VI
S1
RL
VO
50 W
GND
CL
(see Note A)
50 W
VG2
CL
500 W
500 W
3.6 V or GND
5.5 V or GND
30 pF
50 pF
2 x VCC
2 x VCC
500 W
500 W
GND
GND
30 pF
50 pF
0.15 V
0.15 V
Open
Open
500 W
500 W
3.6 V
5.5 V
30 pF
50 pF
0.15 V
0.15 V
S1
tpd(s)
2.5 V ± 0.2 V
3.3 V ± 0.3 V
Open
Open
tPLZ/tPZL
2.5 V ± 0.2 V
3.3 V ± 0.3 V
tPHZ/tPZH
2.5 V ± 0.2 V
3.3 V ± 0.3 V
RL
RL
VI
VCC
TEST
VD
VCC
Output
Control
(VIN)
VCC/2
VCC
VCC/2
VCC/2
0V
tPLH
VCC/2
VCC
VCC/2
tPZH
VOH
Output
tPLZ
Output
Waveform 1
S1 at 2 x VCC
(see Note B)
tPHL
VCC/2
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES (tpd(s))
Output
Waveform 2
S1 at Open
(see Note B)
VCC/2
0V
tPZL
Output
Control
(VIN)
Open
VOL + VD
VOL
tPHZ
VCC/2
VOH – VD
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 W, tr £ 2.5 ns,
tt £ 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 nd 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 2. Test Circuit and Voltage Waveforms
Copyright © 2011, Texas Instruments Incorporated
5
SN74CB3T1G125-Q1
SCDS319 – JUNE 2011
www.ti.com
TYPICAL CHARACTERISTICS
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
3.0
4.0
VCC = 2.3 V
IO = 1 µA
TA = 25°C
V - Output Voltage - V
O
V - Output Voltage - V
O
4.0
2.0
1.0
0.0
3.0
VCC = 3 V
IO = 1 µA
TA = 25°C
2.0
1.0
0.0
0.0
1.0
2.0
3.0
4.0
VI - Input Voltage - V
5.0
6.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
VI - Input Voltage - V
Figure 3. Data Output Voltage vs Data Input Voltage
6
Copyright © 2011, Texas Instruments Incorporated
SN74CB3T1G125-Q1
SCDS319 – JUNE 2011
www.ti.com
TYPICAL CHARACTERISTICS
OUTPUT VOLTAGE HIGH
vs
SUPPLY VOLTAGE
3.5
4.0
VCC = 2.3 V to 3.6 V
VI = 5.5 V
TA = 85°C
100 µA
8 mA
16 mA
24 mA
3.0
2.5
2.0
V
- Output Voltage High - V
OH
V
- Output Voltage High - V
OH
4.0
OUTPUT VOLTAGE HIGH
vs
SUPPLY VOLTAGE
100 µA
8 mA
16 mA
24 mA
3.0
2.5
2.0
1.5
1.5
2.3
3.5
VCC = 2.3 V to 3.6 V
VI = 5.5 V
TA = 25°C
2.5
2.7
2.9
3.1
3.3
VCC - Supply Voltage - V
3.5
3.7
2.3
2.5
2.7
2.9
3.1
3.3
VCC - Supply Voltage - V
3.5
3.7
OUTPUT VOLTAGE HIGH
vs
SUPPLY VOLTAGE
V
- Output Voltage High - V
OH
4.0
3.5
VCC = 2.3 V to 3.6 V
VI = 5.5 V
TA = -40°C
100 µA
8 mA
16 mA
24 mA
3.0
2.5
2.0
1.5
2.3
2.5
2.7
2.9
3.1
3.3
3.5
3.7
VCC - Supply Voltage - V
Figure 4. VOH Values
Copyright © 2011, Texas Instruments Incorporated
7
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
CCB3T1G125QDCKRQ1
ACTIVE
SC70
DCK
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
72R
(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)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of