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TXB0104-Q1
SCES727A – JUNE 2008 – REVISED DECEMBER 2014
TXB0104-Q1 4-Bit Bidirectional Voltage-Level Translator with Automatic Direction Sensing
and ±15-kV ESD Protection
1 Features
3 Description
•
•
Voltage-level translators address the challenges
posed by simultaneous use of different supply-voltage
levels on the same circuit board. This 4-bit noninverting translator uses two separate configurable
power-supply rails. The A port is designed to track
VCCA. VCCA accepts any supply voltage from 1.2 V to
3.6 V. The B port is designed to track VCCB. VCCB
accepts any supply voltage from 1.65 V to 5.5 V. This
allows for universal low-voltage bidirectional
translation between any of the 1.2-V, 1.5-V, 1.8-V,
2.5-V, 3.3-V, and 5-V voltage nodes. VCCA should not
exceed VCCB.
1
•
•
•
•
•
•
Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
1.2 V to 3.6 V on A Port and 1.65 V to 5.5 V on B
Port (VCCA ≤ VCCB)
VCC Isolation Feature – If Either VCC Input is at
GND, All Outputs are in the High-Impedance State
OE Input Circuit Referenced to VCCA
Ioff Supports Partial-Power-Down Mode Operation
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
– A port
– ±2500-V Human-Body Model (A114-B)
– ±1000-V Charged-Device Model (C101)
– B port
– ±15000-V Human-Body Model (A114-B)
– ±1000-V Charged-Device Model (C101)
2 Applications
•
•
•
Automotive infotainment
Advanced Driver Assistance System (ADAS)
Telematics
When the output-enable (OE) input is low, all outputs
are placed in the high-impedance state. To ensure
the high-impedance state during power up or power
down, OE should be tied to GND through a pulldown
resistor; the minimum value of the resistor is
determined by the current-sourcing capability of the
driver.
The TXB0104 is designed so that the OE input circuit
is supplied by VCCA.
This device is fully specified for partial-power-down
applications using Ioff. The Ioff circuitry disables the
outputs, preventing damaging current backflow
through the device when it is powered down.
Device Information(1)
PART NUMBER
TXB0104-Q1
PACKAGE
BODY SIZE (NOM)
TSSOP (14)
5.00 mm x 4.40 mm
VQFN (14)
3.50 mm x 3.50 mm
UQFN (12)
2.00 mm x 1.70 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Block Diagram for TXB010X
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TXB0104-Q1
SCES727A – JUNE 2008 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1
2
3
4
5
6
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
3
4
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
6.13
6.14
6.15
4
4
4
5
5
6
6
6
6
6
7
7
7
8
8
Absolute Maximum Ratings ......................................
ESD Ratings ............................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Timing Requirements: VCCA = 1.2 V ........................
Timing Requirements: VCCA = 1.5 V ± 0.1 V ............
Timing Requirements: VCCA = 1.8 V ± 0.15 V ..........
Timing Requirements: VCCA = 2.5 V ± 0.2 V ............
Timing Requirements: VCCA = 3.3 V ± 0.3 V ..........
Switching Characteristics: VCCA = 1.2 V .................
Switching Characteristics: VCCA = 1.5 V ± 0.1 V ....
Switching Characteristics: VCCA = 1.8 V ± 0.15 V ..
Switching Characteristics: VCCA = 2.5 V ± 0.2 V ....
Switching Characteristics: VCCA = 3.3 V ± 0.3 V ....
6.16 Operating Characteristics........................................ 9
6.17 Typical Characteristics ............................................ 9
7
8
Parameter Measurement Information ................ 10
Detailed Description ............................................ 11
8.1
8.2
8.3
8.4
9
Overview .................................................................
Functional Block Diagram .......................................
Feature Description.................................................
Device Functional Modes........................................
11
11
11
13
Application and Implementation ........................ 14
9.1 Application Information............................................ 14
9.2 Typical Application .................................................. 14
10 Power Supply Recommendations ..................... 16
11 Layout................................................................... 16
11.1 Layout Guidelines ................................................. 16
11.2 Layout Example .................................................... 16
12 Device and Documentation Support ................. 17
12.1 Trademarks ........................................................... 17
12.2 Electrostatic Discharge Caution ............................ 17
12.3 Glossary ................................................................ 17
13 Mechanical, Packaging, and Orderable
Information ........................................................... 17
4 Revision History
Changes from Original (June 2008) to Revision A
•
2
Page
Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
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SCES727A – JUNE 2008 – REVISED DECEMBER 2014
5 Pin Configuration and Functions
A2 3
13 B1
12 B2
A3 4
11 B3
A4 5
10 B4
A3
A4
4
5
NC
6
6
9
NC
GND
7
8
OE
2
VCCA 1
13 B1
12 B2
Exposed
Center
Pad
3
OE
14
11 B3
10 B4
9 NC
7
8
OE
NC
A1
A2
1
GND
A1 2
RUT PACKAGE
12 PINS
(TOP VIEW)
12
11 VCCB
A1
2
10 B1
A2
3
9
B2
8
B3
7
B4
A3
4
A4
5
6
GND
14 VCCB
VCCA 1
VCCB
PW PACKAGE
14 PINS
(TOPVIEW)
VCCA
RGY
PACKAGE
14 PINS
(TOP VIEW)
NC − No internal connection
For RGY, if the exposed center pad is used, it must be connected only to as a secondary ground or left electrically
open.
Pin Functions
PIN
I/O
DESCRIPTION
NO.
NAME
1
VCCA
I
2
A1
I/O
Input/output 1. Referenced to VCCA.
3
A2
I/O
Input/output 2. Referenced to VCCA.
4
A3
I/O
Input/output 3. Referenced to VCCA.
5
A4
I/O
Input/output 4. Referenced to VCCA.
6
NC
–
No connection. Not internally connected.
7
GND
–
Ground
8
OE
I
3-state output-mode enable. Pull OE low to place all outputs in 3-state mode. Referenced to VCCA.
9
NC
–
No connection. Not internally connected.
10
B4
I/O
Input/output 4. Referenced to VCCB.
11
B3
I/O
Input/output 3. Referenced to VCCB.
12
B2
I/O
Input/output 2. Referenced to VCCB.
13
B1
I/O
Input/output 1. Referenced to VCCB.
14
VCCB
I
A-port supply voltage 1.2 V ≤ VCCA ≤ 3.6 V and VCCA ≤ VCCB.
B-port supply voltage 1.65 V ≤ VCCB ≤ 5.5 V.
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6 Specifications
6.1 Absolute Maximum Ratings (1)
over operating free-air temperature range (unless otherwise noted)
VCCA
VCCB
MIN
MAX
–0.5
4.6
–0.5
6.5
A port
–0.5
4.6
B port
–0.5
6.5
A port
–0.5
4.6
B port
-0.5
6.5
A port
–0.5
VCCA + 0.5
B port
–0.5
VCCB + 0.5
Supply voltage
UNIT
V
VI
Input voltage
VO
Voltage applied to any output in the high-impedance or
power-off state
VO
Voltage applied to any output in the high or low state (2)
IIK
Input clamp current
VI < 0
–50
mA
IOK
Output clamp current
VO < 0
–50
mA
IO
Continuous output current
±50
mA
±100
mA
150
°C
Continuous current through VCCA, VCCB, or GND
Tstg
(1)
(2)
Storage temperature
–65
V
V
V
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.
The value of VCCA and VCCB are provided in the recommended operating conditions table.
6.2 ESD Ratings
VALUE
Human-body model (HBM), per JEDEC
V(ESD)
Electrostatic discharge
Charged-device model (CDM), per JEDEC
A Port
±2500
B Port
±15000
A Port
±1000
B Port
±1000
UNIT
V
6.3 Recommended Operating Conditions (1) (2)
VCCA
VCCA
VCCB
Supply voltage
MAX
1.2
3.6
1.65
5.5
1.2 V to 3.6 V
1.65 V to 5.5 V
VCCI × 0.65 (3)
VCCI
OE
1.2 V to 3.6 V
1.65 V to 5.5 V
VCCA × 0.65
5.5
Data inputs
1.2 V to 5.5 V
1.65 V to 5.5 V
0
VCCI × 0.35 (3)
OE
1.2 V to 3.6 V
1.65 V to 5.5 V
0
VCCA × 0.35
0
3.6
1.2 V to 3.6 V
1.65 V to 5.5 V
0
5.5
1.2 V to 3.6 V
1.65 V to 5.5 V
40
1.65 V to 3.6 V
40
High-level input voltage
VIL
Low-level input voltage
VO
Voltage range applied to any A-port
output in the high-impedance
B-port
or power-off state
Δt/Δv
Input transition
rise or fall rate
TA
Operating free-air temperature
A-port inputs
4
MIN
Data inputs
VIH
(1)
(2)
(3)
VCCB
B-port inputs
1.2 V to 3.6 V
4.5 V to 5.5 V
UNIT
V
V
V
V
ns/V
30
–40
125
°C
The A and B sides of an unused data I/O pair must be held in the same state, i.e., both at VCCI or both at GND.
VCCA must be less than or equal to VCCB and must not exceed 3.6 V.
VCCI is the supply voltage associated with the input port.
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6.4 Thermal Information
TXB0104-Q1
THERMAL METRIC (1)
PW
RGY
RUT
14 PINS
14 PINS
12 PINS
121
52.8
119.8
RθJA
Junction-to-ambient thermal resistance
RθJC(top)
Junction-to-case (top) thermal resistance
50
67.7
42.6
RθJB
Junction-to-board thermal resistance
62.8
28.9
52.5
ψJT
Junction-to-top characterization parameter
6.4
2.6
0.7
ψJB
Junction-to-board characterization parameter
62.2
29.0
52.3
RθJC(bot)
Junction-to-case (bottom) thermal resistance
N/A
9.3
N/A
(1)
UNIT
°C/W
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
6.5 Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCCA
VCCB
VOLA
IOL = 20 μA
VOHB
IOH = –20 μA
1.65 V to 5.5 V
VOLB
IOL = 20 μA
1.65 V to 5.5 V
Ioff
IOZ
VI = VCCI or GND
A port
MIN
TYP
MAX
1.4 V to 3.6 V
1.2 V
0.9
1.4 V to 3.6 V
0.4
VCCB – 0.4
V
V
μA
±5
VI or VO = 0 to 3.6 V
0V
0 V to 5.5 V
±1
±10
B port
VI or VO = 0 to 5.5 V
0 V to 3.6 V
0V
±1
±10
A or B port
OE = GND
1.2 V to 3.6 V
1.65 V to 5.5 V
±1
±10
1.2 V
1.65 V to 5.5 V
1.4 V to 3.6 V
1.65 V to 5.5 V
20
3.6 V
0V
15
0V
5.5 V
–15
VI = VCCI or GND,
IO = 0
1.65 V to 5.5 V
1.65 V to 5.5 V
3.4
20
3.6 V
0V
–15
0V
5.5 V
15
1.2 V
1.65 V to 5.5 V
1.4 V to 3.6 V
1.65 V to 5.5 V
1.2 V
1.65 V to 5.5 V
1.4 V to 3.6 V
1.65 V to 5.5 V
PW, RGY package
1.2 V to 3.6 V
1.65 V to 5.5 V
3
pF
RUT package
1.2 V to 3.6 V
1.65 V to 5.5 V
4
pF
PW, RGY package
5
pF
RUT package
6
pF
11
pF
13
pF
ICCZB
VI = VCCI or GND,
IO = 0,
OE = GND
PW, RGY package
1.2 V to 3.6 V
1.65 V to 5.5 V
RUT package
3.5
μA
1.65 V to 5.5 V
VI = VCCI or GND,
IO = 0,
OE = GND
B port
1.2 V
1.4 V to 3.6 V
μA
1.65 V to 5.5 V
ICCZA
Cio
μA
0.06
1.2 V
VI = VCCI or GND,
IO = 0
A port
μA
1.4 V to 3.6 V
ICCA + ICCB
OE
V
0.4
±1
VI = VCCI or GND,
IO = 0
UNIT
V
VCCA – 0.4
1.65 V to 5.5 V
ICCB
(1)
(2)
–40°C to 125°C
MAX
1.2 V to 3.6 V
ICCA
Ci
TYP
1.1
IOH = –20 μA
OE
TA = 25°C
MIN
1.2 V
VOHA
II
(1) (2)
40
μA
0.05
15
μA
3.3
15
μA
VCCI is the supply voltage associated with the input port.
VCCO is the supply voltage associated with the output port.
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6.6 Timing Requirements: VCCA = 1.2 V
TA = 25°C, VCCA = 1.2 V
VCCB = 1.8 V
tw
VCCB = 2.5 V
VCCB = 3.3 V
VCCB = 5 V
TYP
TYP
TYP
TYP
UNIT
Data rate
For PW, RGY, RUT package
20
20
20
20
Mbps
Pulse duration
Data inputs
50
50
50
50
ns
6.7 Timing Requirements: VCCA = 1.5 V ± 0.1 V
over recommended operating free-air temperature range, VCCA = 1.5 V ± 0.1 V (unless otherwise noted)
VCCB = 1.8 V
± 0.15 V
MIN
Data rate
tw
Pulse duration
MAX
VCCB = 2.5 V
± 0.2 V
MIN
VCCB = 3.3 V
± 0.3 V
MAX
MIN
VCCB = 5 V
± 0.5 V
MAX
MIN
UNIT
MAX
For PW, RGY package
40
40
40
40
Mbps
For RUT package
37
37
40
40
Mbps
Data inputs, For PW, RGY
package
25
25
25
25
ns
Data inputs, For RUT package
27
27
25
25
ns
6.8 Timing Requirements: VCCA = 1.8 V ± 0.15 V
over recommended operating free-air temperature range, VCCA = 1.8 V ± 0.15 V (unless otherwise noted)
VCCB = 1.8 V
± 0.15 V
MIN
Data rate
tw
Pulse duration
MAX
VCCB = 2.5 V
± 0.2 V
MIN
VCCB = 3.3 V
± 0.3 V
MAX
MIN
VCCB = 5 V
± 0.5 V
MAX
MIN
UNIT
MAX
For PW, RGY package
55
55
55
55
Mbps
For RUT package
37
37
55
55
Mbps
Data inputs, For PW, RGY
package
18
18
18
18
ns
Data inputs, For RUT package
27
27
18
18
ns
6.9 Timing Requirements: VCCA = 2.5 V ± 0.2 V
over recommended operating free-air temperature range, VCCA = 2.5 V ± 0.2 V (unless otherwise noted)
VCCB = 2.5 V
± 0.2 V
MIN
Data rate
tw
Pulse duration
VCCB = 3.3 V
± 0.3 V
MAX
MIN
VCCB = 5 V
± 0.5 V
MAX
MIN
UNIT
MAX
For PW, RGY package
75
80
100
Mbps
For RUT package
65
80
85
Mbps
Data inputs, For PW, RGY package
13
12
10
ns
Data inputs, For RUT package
15
12
11
ns
6.10 Timing Requirements: VCCA = 3.3 V ± 0.3 V
over recommended operating free-air temperature range, VCCA = 3.3 V ± 0.3 V (unless otherwise noted)
VCCB = 3.3 V
± 0.3 V
MIN
Data rate
tw
6
Pulse duration
For PW, RGY package
For RUT package
VCCB = 5 V
± 0.5 V
MAX
MIN
UNIT
MAX
100
100
Mbps
90
90
Mbps
Data inputs, For PW, RGY package
10
10
ns
Data inputs, For RUT package
11
11
ns
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6.11 Switching Characteristics: VCCA = 1.2 V
TA = 25°C, VCCA = 1.2 V
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
A
B
VCCB = 1.8 V
VCCB = 2.5 V
VCCB = 3.3 V
VCCB = 5 V
UNIT
TYP
TYP
TYP
TYP
B
6.9
5.7
5.3
5.5
A
7.4
6.4
6
5.8
A
1
1
1
1
B
1
1
1
1
A
320
320
320
330
B
150
110
150
110
trA, tfA
A-port rise and fall times
4.2
4.2
4.2
4.2
ns
trB, tfB
B-port rise and fall times
2.1
1.5
1.2
1.1
ns
tpd
ten
OE
tdis
OE
ns
μs
ns
6.12 Switching Characteristics: VCCA = 1.5 V ± 0.1 V
over recommended operating free-air temperature range, VCCA = 1.5 V ± 0.1 V (unless otherwise noted)
VCCB = 1.8 V
± 0.15 V
VCCB = 2.5 V
± 0.2 V
VCCB = 3.3 V
± 0.3 V
VCCB = 5 V
± 0.5 V
FROM
(INPUT)
TO
(OUTPUT)
A
B
15.9
13.1
13
12.9
B
A
17.2
15
14.7
16.7
A
1
1
1
1
B
1
1
1
1
A
340
280
280
300
B
220
220
220
220
trA, tfA
A-port rise and fall times
7.1
7.1
7.1
7.1
ns
trB, tfB
B-port rise and fall times
6.5
5.2
4.8
4.7
ns
PARAMETER
tpd
ten
OE
tdis
OE
MIN
MAX
MIN
MAX
MIN
MAX
MIN
UNIT
MAX
ns
μs
ns
6.13 Switching Characteristics: VCCA = 1.8 V ± 0.15 V
over recommended operating free-air temperature range, VCCA = 1.8 V ± 0.15 V (unless otherwise noted)
VCCB = 1.8 V
± 0.15 V
VCCB = 2.5 V
± 0.2 V
VCCB = 3.3 V
± 0.3 V
VCCB = 5 V
± 0.5 V
FROM
(INPUT)
TO
(OUTPUT)
A
B
14
10.7
9.8
9.5
B
A
15
11.4
10.6
10.1
A
1
1
1
1
B
1
1
1
1
A
280
250
250
250
B
220
220
220
220
trA, tfA
A-port rise and fall times
6.2
6.1
6.1
6.1
ns
trB, tfB
B-port rise and fall times
5.8
5.2
4.8
4.7
ns
PARAMETER
tpd
ten
OE
tdis
OE
MIN
MAX
MIN
MAX
MIN
MAX
MIN
UNIT
MAX
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μs
ns
7
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6.14 Switching Characteristics: VCCA = 2.5 V ± 0.2 V
over recommended operating free-air temperature range, VCCA = 2.5 V ± 0.2 V (unless otherwise noted)
PARAMETER
tpd
VCCB = 2.5 V
± 0.2 V
VCCB = 3.3 V
± 0.3 V
VCCB = 5 V
± 0.5 V
FROM
(INPUT)
TO
(OUTPUT)
A
B
9.3
8.2
7.7
B
A
9.6
8.1
7.4
A
1
1
1
B
1
1
1
A
220
220
220
B
220
220
220
ten
OE
tdis
OE
MIN
MAX
MIN
MAX
MIN
UNIT
MAX
ns
μs
ns
trA, tfA
A-port rise and fall times
5
5
5
ns
trB, tfB
B-port rise and fall times
4.6
4.8
4.7
ns
6.15 Switching Characteristics: VCCA = 3.3 V ± 0.3 V
over recommended operating free-air temperature range, VCCA = 3.3 V ± 0.3 V (unless otherwise noted)
PARAMETER
tpd
VCCB = 3.3 V
± 0.3 V
VCCB = 5 V
± 0.5 V
FROM
(INPUT)
TO
(OUTPUT)
A
B
7.7
7
B
A
7.9
6.8
A
1
1
B
1
1
A
280
280
B
220
220
ten
OE
tdis
OE
MIN
MAX
MIN
UNIT
MAX
ns
μs
ns
trA, tfA
A-port rise and fall times
4.5
4.5
ns
trB, tfB
B-port rise and fall times
4.1
4.7
ns
8
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6.16 Operating Characteristics (1)
TA = 25°C
VCCA
1.2 V
1.2 V
1.5 V
1.8 V
2.5 V
2.5 V
3.3 V
2.5 V
5V
3.3 V
to
5V
VCCB
PARAMETER
TEST CONDITIONS
5V
CpdA
CpdB
CpdA
CpdB
(1)
A-port input, B-port output
B-port input, A-port output
A-port input, B-port output
B-port input, A-port output
A-port input, B-port output
B-port input, A-port output
A-port input, B-port output
B-port input, A-port output
CL = 0, f = 10 MHz,
tr = tf = 1 ns,
OE = VCCA
(outputs enabled)
CL = 0, f = 10 MHz,
tr = tf = 1 ns,
OE = GND
(outputs disabled)
1.8 V
1.8 V
1.8 V
UNIT
TYP
TYP
TYP
TYP
TYP
TYP
TYP
7.8
10
9
8
8
8
9
12
11
11
11
11
11
11
38.1
28
28
28
29
29
29
25.4
19
18
18
19
21
22
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.03
0.01
0.01
0.01
0.01
0.01
0.01
0.04
pF
pF
Cpd parameter is the capacitance used to determine the no-load dynamic power dissipation per logic function for CMOS devices as per
the formula: PD = Cpd (VCC)2 + ICCVCC. For more details about the use of Cpd to calculate power dissipation, refer to SCAA035.
6.17 Typical Characteristics
Figure 1. Input capacitance for OE pin (CI) vs Power Supply
(VCCA) for VCCB = 3.3 V (RUT package)
Figure 2. Capacitance for A port I/O pins (CiO) vs Power
Supply (VCCA) for VCCB = 3.3 V (RUT package)
Figure 3. Capacitance for B port I/O pins (CiO) vs Power Supply (VCCB) for VCCA = 3.3 V (RUT package)
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7 Parameter Measurement Information
2 × VCCO
From Output
Under Test
50 kW
From Output
Under Test
15 pF
15 pF
1 MW
Open
50 kW
TEST
tPZL/tPLZ
tPHZ/tPZH
LOAD CIRCUIT FOR
ENABLE/DISABLE
TIME MEASUREMENT
LOAD CIRCUIT FOR MAX DATA RATE,
PULSE DURATION PROPAGATION
DELAY OUTPUT RISE AND FALL TIME
MEASUREMENT
S1
S1
2 × VCCO
Open
VCCI
Input
VCCI/2
VCCI/2
0V
tPLH
tPHL
tw
Output
VCCO/2
0.9 y VCCO
0.1 y VCCO
VOH
tf
tr
VCCI
VCCO/2
VOL
Input
VCCI/2
0V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
A.
B.
C.
D.
E.
F.
G.
VCCI/2
CL includes probe and jig capacitance.
All input pulses are supplied by generators having the following characteristics: PRRv10 MHz, ZO = 50 Ω, dv/dt ≥ 1 V/ns.
The outputs are measured one at a time, with one transition per measurement.
tPLH and tPHL are the same as tpd.
VCCI is the VCC associated with the input port.
VCCO is the VCC associated with the output port.
All parameters and waveforms are not applicable to all devices.
Figure 4. Load Circuits and Voltage Waveforms
10
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8 Detailed Description
8.1 Overview
The TXB0104 device is a 4-bit, bi-directional voltage-level translator specifically designed for translating logic
voltage levels. The A port is able to accept I/O voltages ranging from 1.2 V to 3.6 V, while the B port can accept
I/O voltages from 1.65 V to 5.5 V. The device is a buffered architecture with edge-rate accelerators (one-shots)
to improve the overall data rate. This device can only translate push-pull CMOS logic outputs. If for open-drain
signal translation, please refer to TI’s TXS010X products.
8.2 Functional Block Diagram
8.3 Feature Description
8.3.1 Architecture
The TXB0104 architecture (see Functional Block Diagram) does not require a direction-control signal to control
the direction of data flow from A to B or from B to A. In a DC state, the output drivers of the TXB0104 can
maintain a high or low, but are designed to be weak, so that they can be overdriven by an external driver when
data on the bus starts flowing the opposite direction.
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Feature Description (continued)
The output one-shots detect rising or falling edges on the A or B ports. During a rising edge, the one-shot turns
on the PMOS transistors (T1, T3) for a short duration, which speeds up the low-to-high transition. Similarly,
during a falling edge, the one-shot turns on the NMOS transistors (T2, T4) for a short duration which speeds up
the high-to-low transition. The typical output impedance during output transition is 70 Ω at VCCO = 1.2 V to 1.8 V,
50 Ω at VCCO = 1.8 V to 3.3 V, and 40 Ω at VCCO = 3.3 V to 5 V.
VCCA
VCCB
One
Shot
T1
4k
One
Shot
T2
A
B
One
Shot
T3
4k
T4
One
Shot
Figure 5. Architecture of TXB0104 I/O Cell
8.3.2 Input Driver Requirements
Typical IIN vs VIN characteristics of the TXB0104 are shown in Figure 6. For proper operation, the device driving
the data I/Os of the TXB0104 must have drive strength of at least ±2 mA.
IIN
VT/4 kW
VIN
–(VD – VT)/4 kW
A. VT is the input threshold voltage of the TXB0104 (typically VCCI/2).
B. VD is the supply voltage of the external driver.
Figure 6. Typical IIN vs VIN Curve
12
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Feature Description (continued)
8.3.3 Output Load Considerations
TI recommends careful PCB layout practices with short PCB trace lengths to avoid excessive capacitive loading
and to ensure that proper one shot (O.S.) triggering takes place. PCB signal trace-lengths should be kept short
enough such that the round trip delay of any reflection is less than the one-shot duration. This improves signal
integrity by ensuring that any reflection sees a low impedance at the driver. The O.S. circuits have been
designed to stay on for approximately 10 ns. The maximum capacitance of the lumped load that can be driven
also depends directly on the one-shot duration. With very heavy capacitive loads, the one-shot can time-out
before the signal is driven fully to the positive rail. The O.S. duration has been set to best optimize trade-offs
between dynamic ICC, load driving capability, and maximum bit-rate considerations. Both PCB trace length and
connectors add to the capacitance that the TXB0104 output sees, so it is recommended that this lumped-load
capacitance be considered to avoid O.S. retriggering, bus contention, output signal oscillations, or other adverse
system-level affects.
8.3.4 Enable and Disable
The TXB0104 has an OE input that is used to disable the device by setting OE = low, which places all I/Os in the
high-impedance (Hi-Z) state. The disable time (tdis) indicates the delay between when OE goes low and when the
outputs actually get disabled (Hi-Z). The enable time (ten) indicates the amount of time the user must allow for the
one-shot circuitry to become operational after OE is taken high.
8.3.5 Pullup or Pulldown Resistors on I/O Lines
The TXB0104 is designed to drive capacitive loads of up to 70 pF. The output drivers of the TXB0104 have low
DC drive strength. If pullup or pulldown resistors are connected externally to the data I/Os, their values must be
kept higher than 50 kΩ to ensure that they do not contend with the output drivers of the TXB0104.
For the same reason, the TXB0104 should not be used in applications such as I2C or 1-Wire where an opendrain driver is connected on the bidirectional data I/O. For these applications, use a device from the TI TXS01xx
series of level translators.
8.4 Device Functional Modes
The TXB0104 device has two functional modes, enabled and disabled. To disable the device, set the OE input to
low, which places all I/Os in a high impedance state. Setting the OE input to high will enable the device.
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9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The TXB0104 can be used in level-translation applications for interfacing devices or systems operating at
different interface voltages with one another. It can only translate push-pull CMOS logic outputs. If for open-drain
signal translation, please refer to TI TXS010X products. Any external pulldown or pullup resistors are
recommended larger than 50 kΩ.
9.2 Typical Application
Figure 7. Typical Application Schematic
9.2.1 Design Requirements
For this design example, use the parameters listed in Table 1. And make sure the VCCA ≤VCCB.
Table 1. Design Parameters
DESIGN PARAMETERS
EXAMPLE VALUE
Input voltage range
1.2 V to 3.6 V
Output voltage range
1.65 V to 5.5 V
9.2.2 Detailed Design Procedure
To begin the design process, determine the following:
• Input voltage range
- Use the supply voltage of the device that is driving the TXB0104 device to determine the input voltage
range. For a valid logic high the value must exceed the VIH of the input port. For a valid logic low the value
must be less than the VIL of the input port.
• Output voltage range
- Use the supply voltage of the device that the TXB0104 device is driving to determine the output voltage
range.
- It is not recommended to have the external pullup or pulldown resistors. If mandatory, it is recommended
the value should be larger than 50 kΩ.
• An external pulldown or pullup resistor decreases the output VOH and VOL. Use the below equations to draft
estimate the VOH and VOL as a result of an external pulldown and pullup resistor.
14
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VOH = VCCx × RPD / (RPD + 4.5 kΩ)
VOL = VCCx × 4.5 kΩ / (RPU + 4.5 kΩ)
(1)
where
•
•
•
•
VCCx is the output port supply voltage on either VCCA or VCCB
RPD is the value of the external pull down resistor
RPU is the value of the external pull up resistor
4.5 kΩ is the counting the variation of the serial resistor 4 kΩ in the I/O line
(2)
9.2.3 Application Curve
Figure 8. Example of Level Translation of a 2.5-MHz 1.8 V Signal (Green) to a 3.3 V Signal (Pink)
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10 Power Supply Recommendations
During operation, ensure that VCCA ≤ VCCB at all times. During power-up sequencing, VCCA ≥ VCCB does not
damage the device, so any power supply can be ramped up first. The TXB0104 has circuitry that disables all
output ports when either VCC is switched off (VCCA/B = 0 V). The output-enable (OE) input circuit is designed so
that it is supplied by VCCA and when the (OE) input is low, all outputs are placed in the high-impedance state. To
ensure the high-impedance state of the outputs during power up or power down, the OE input pin must be tied to
GND through a pulldown resistor and must not be enabled until VCCA and VCCB are fully ramped and stable. The
minimum value of the pulldown resistor to ground is determined by the current-sourcing capability of the driver.
11 Layout
11.1 Layout Guidelines
To ensure reliability of the device, following common printed-circuit board layout guidelines are recommended:
• Bypass capacitors should be used on power supplies. And should be placed as close as possible to the
VCCA, VCCB pin, and GND pin
• Short trace-lengths should be used to avoid excessive loading.
• PCB signal trace-lengths must be kept short enough so that the round-trip delay of any reflection is less than
the one-shot duration, approximately 10 ns, ensuring that any reflection encounters low impedance at the
source driver.
11.2 Layout Example
Figure 9. Layout Example Schematic
16
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12 Device and Documentation Support
12.1 Trademarks
All trademarks are the property of their respective owners.
12.2 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
12.3 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
13 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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PACKAGE OPTION ADDENDUM
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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)
TXB0104QPWRQ1
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
YE04Q1
TXB0104QRGYRQ1
ACTIVE
VQFN
RGY
14
3000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
YE04Q1
TXB0104QRUTRQ1
ACTIVE
UQFN
RUT
12
3000
RoHS & Green
NIPDAUAG
Level-1-260C-UNLIM
-40 to 125
SIG
(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
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