SN74CB3T3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V TOLERANT LEVEL SHIFTER
www.ti.com
SCDS148 – OCTOBER 2003 – REVISED JUNE 2005
FEATURES
•
•
•
•
•
•
•
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
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Performance Tested Per JESD 22
– 2000-V Human-Body Model
(A114-B, Class II)
– 1000-V Charged-Device Model (C101)
Supports Digital Applications: Level
Translation, USB Interface, Memory
Interleaving, Bus Isolation
Ideal for Low-Power Portable Equipment
D, DBQ, DGV, OR PW PACKAGE
(TOP VIEW)
1OE
S1
1B4
1B3
1B2
1B1
1A
GND
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
VCC
2OE
S0
2B4
2B3
2B2
2B1
2A
DESCRIPTION/ORDERING INFORMATION
The SN74CB3T3253 is a high-speed TTL-compatible FET multiplexer/demultiplexer 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 SN74CB3T3253 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 SN74CB3T3253 is organized as two 1-of-4 multiplexer/demultiplexers with separate output-enable (1OE,
2OE) inputs. The select (S0, S1) inputs control the data path of each multiplexer/demultiplexer. When OE is low,
the associated multiplexer/demultiplexer is ON, and the A port is connected to the B port, allowing bidirectional
data flow between ports. When OE is high, the associated multiplexer/demultiplexer 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.
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 © 2003–2005, Texas Instruments Incorporated
SN74CB3T3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V TOLERANT LEVEL SHIFTER
www.ti.com
SCDS148 – OCTOBER 2003 – REVISED JUNE 2005
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
PACKAGE (1)
TA
SOIC – D
–40°C to 85°C
SSOP (QSOP) – DBQ
TSSOP – PW
TVSOP – DGV
(1)
ORDERABLE PART NUMBER
Tube
SN74CB3T3253D
Tape and reel
SN74CB3T3253DR
Tape and reel
SN74CB3T3253DBQR
Tube
SN74CB3T3253PW
Tape and reel
SN74CB3T3253PWR
Tape and reel
SN74CB3T3253DGVR
CB3T3253
KS253
KS253
KS253
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
(EACH MULTIPLEXER/DEMULTIPLEXER)
INPUTS
2
TOP-SIDE MARKING
S0
INPUT/OUTPUT
A
FUNCTION
L
L
B1
A port = B1 port
L
H
B2
A port = B2 port
H
L
B3
A port = B3 port
H
H
B4
A port = B4 port
X
X
Z
Disconnect
OE
S1
L
L
L
L
H
SN74CB3T3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V TOLERANT LEVEL SHIFTER
www.ti.com
SCDS148 – OCTOBER 2003 – REVISED JUNE 2005
LOGIC DIAGRAM (POSITIVE LOGIC)
7
6
1A
SW
5
SW
1B1
1B2
4
SW
1B3
3
1B4
SW
9
10
2A
2B1
SW
11
SW
2B2
12
2B3
SW
13
SW
2B4
14
S0
2
S1
1
1OE
2OE
15
SIMPLIFIED SCHEMATIC, EACH FET SWITCH (SW)
A
B
VG(1)
Control
Circuit
EN(2)
(1) Gate voltage (VG) is approximately equal to VCC + VT when the switch is ON
and VI > VCC + VT.
(2) EN is the internal enable signal applied to the switch.
3
SN74CB3T3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V TOLERANT LEVEL SHIFTER
www.ti.com
SCDS148 – OCTOBER 2003 – REVISED JUNE 2005
Absolute Maximum Ratings (1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
VCC
Supply voltage range (2)
–0.5
7
V
VIN
Control input voltage range (2) (3)
–0.5
7
V
VI/O
Switch I/O voltage
range (2) (3) (4)
IIK
Control input clamp current
VIN < 0
–50
mA
II/OK
I/O port clamp current
VI/O < 0
–50
mA
±128
mA
±100
mA
II/O
ON-state switch
–0.5
7
current (5)
Continuous current through VCC or GND
D package
θJA
Package thermal impedance (6)
Tstg
Storage temperature range
(2)
(3)
(4)
(5)
(6)
V
73
DBQ package
90
DGV package
120
PW package
(1)
UNIT
°C/W
108
–65
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)
4
MIN
MAX
2.3
3.6
UNIT
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
0
5.5
V
–40
85
°C
V
V
V
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.
www.ti.com
SN74CB3T3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V TOLERANT LEVEL SHIFTER
SCDS148 – OCTOBER 2003 – REVISED JUNE 2005
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
Control inputs
IOZ
Ioff
VCC = 0, VO = 0 to 5.5 V, VI = 0
ICC
VCC = 3.6 V, II/O = 0, Switch ON or OFF,
VIN = VCC or GND
∆ICC (4)
Control inputs
VCC = 3 V to 3.6 V, One input at VCC – 0.6 V,
Other inputs at VCC or GND
Cin
Control inputs
VCC = 3.3 V, VIN = VCC or GND
A port
B port
Cio(ON)
VCC = 3.3 V, Switch ON, VIN = VCC or GND
B port
VCC = 2.3 V, TYP at VCC = 2.5 V, VI = 0
ron (5)
VCC = 3 V, VI = 0
(1)
(2)
(3)
(4)
(5)
±10
µA
VI = 0.7 V to VCC – 0.7 V
–40
µA
±5
±10
µA
10
µA
VI = VCC or GND
20
VI = 5.5 V
20
µA
µA
300
3
pF
12
VCC = 3.3 V, VI/O = 5.5 V, 3.3 V, or GND,
Switch OFF, VIN = VCC or GND
A port
V
±20
VI = 0 to 0.7 V
UNIT
–1.2
VI = VCC – 0.7 V to 5.5 V
VCC = 3.6 V, VO = 0 to 5.5 V, VI = 0,
Switch OFF, VIN = VCC or GND
(3)
Cio(OFF)
TYP (2) MAX
VCC = 3.6 V, VIN = 3.6 V to 5.5 V or GND
VCC = 3.6 V, Switch ON,
VIN = VCC or GND
II
MIN
pF
5
VI/O = 5.5 V or 3.3 V
10
VI/O = GND
22
VI/O = 5.5 V or 3.3 V
pF
4
VI/O = GND
22
IO = 24 mA
5
8
IO = 16 mA
5
8
IO = 64 mA
5
7
IO = 32 mA
5
7
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)
TO
(OUTPUT)
tpd (1)
A or B
B or A
tpd(s)
S
A
1
ten
tdis
(1)
VCC = 2.5 V
± 0.2 V
FROM
(INPUT)
PARAMETER
MIN
MAX
VCC = 3.3 V
± 0.3 V
MIN
0.15
UNIT
MAX
0.25
ns
10.5
1
8
ns
S
B
1
10
1
8
OE
A or B
1
8.5
1
8
S
B
1
7.5
1
8.5
OE
A or B
1
6.5
1
8
ns
ns
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).
5
SN74CB3T3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V TOLERANT LEVEL SHIFTER
www.ti.com
SCDS148 – OCTOBER 2003 – REVISED JUNE 2005
PARAMETER MEASUREMENT INFORMATION
VCC
Input Generator
VIN
50 Ω
50 Ω
VG1
TEST CIRCUIT
DUT
2 × VCC
Input Generator
S1
RL
VO
VI
50 Ω
50 Ω
VG2
CL
(see Note A)
RL
TEST
VCC
S1
RL
VI
CL
tpd(s)
2.5 V ± 0.2 V
3.3 V ± 0.3 V
Open
Open
500 Ω
500 Ω
3.6 V or GND
5.5 V or GND
30 pF
50 pF
tPLZ/tPZL
2.5 V ± 0.2 V
3.3 V ± 0.3 V
2 × VCC
2 × VCC
500 Ω
500 Ω
GND
GND
30 pF
50 pF
0.15 V
0.3 V
tPHZ/tPZH
2.5 V ± 0.2 V
3.3 V ± 0.3 V
Open
Open
500 Ω
500 Ω
3.6 V
5.5 V
30 pF
50 pF
0.15 V
0.3 V
V∆
VCC
Output
Control
(VIN)
VCC/2
VCC
VCC/2
VCC/2
0V
tPLH
VOH
Output
VCC/2
VCC/2
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES (tpd(s))
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
tPLZ
VCC
VCC/2
VOL + V∆
VOL
tPZH
tPHL
VCC/2
0V
tPZL
Output
Control
(VIN)
Open
GND
Output
Waveform 2
S1 at Open
(see Note B)
tPHZ
VOH
VCC/2
VOH − V∆
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 2. Test Circuit and Voltage Waveforms
6
SN74CB3T3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V TOLERANT LEVEL SHIFTER
www.ti.com
SCDS148 – OCTOBER 2003 – REVISED JUNE 2005
TYPICAL CHARACTERISTICS
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
4.0
VCC = 2.3 V
IO = 1 µA
TA = 25°C
3.0
V - Output Voltage - V
O
V - Output Voltage - V
O
4.0
2.0
1.0
0.0
0.0
1.0
2.0
3.0
4.0
VI - Input Voltage - V
5.0
6.0
VCC = 3 V
IO = 1 µA
TA = 25°C
3.0
2.0
1.0
0.0
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
7
SN74CB3T3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V TOLERANT LEVEL SHIFTER
www.ti.com
SCDS148 – OCTOBER 2003 – REVISED JUNE 2005
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
1.5
2.3
2.5
2.7
2.9
3.1
3.3
3.5
V
- Output Voltage High - V
OH
V
- Output Voltage High - V
OH
4.0
OUTPUT VOLTAGE HIGH
vs
SUPPLY VOLTAGE
VCC = 2.3 V to 3.6 V
VI = 5.5 V
TA = 25°C
3.5
100 µA
8 mA
16 mA
24 mA
3.0
2.5
2.0
1.5
3.7
2.3
2.5
2.7
2.9
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
VCC - Supply Voltage - V
Figure 4. VOH Values
8
3.1
VCC - Supply Voltage - V
VCC - Supply Voltage - V
3.3
3.5
3.7
3.3
3.5
3.7
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)
SN74CB3T3253D
ACTIVE
SOIC
D
16
40
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
CB3T3253
SN74CB3T3253DBQR
ACTIVE
SSOP
DBQ
16
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
KS253
SN74CB3T3253DGVR
ACTIVE
TVSOP
DGV
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
KS253
SN74CB3T3253DR
ACTIVE
SOIC
D
16
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
CB3T3253
SN74CB3T3253PW
ACTIVE
TSSOP
PW
16
90
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
KS253
SN74CB3T3253PWR
ACTIVE
TSSOP
PW
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
KS253
(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