TI TXB0108RGYR

TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
FEATURES
•
•
•
•
•
•
1.2 V to 3.6 V on A Port and 1.65 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
Low Power Consumption, 4-µA Max ICC
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
– 2000-V Human-Body Model (A114-B)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
– B Port
– ±15-kV Human-Body Model (A114-B)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
GXY OR ZXY PACKAGE
(BOTTOM VIEW)
1
2
3
4
TERMINAL ASSIGNMENTS
(20-Ball GXY/ZXY Package)
5
D
C
B
1
2
3
4
5
D
VCCB
B2
B4
B6
B8
C
B1
B3
B5
B7
GND
B
A1
A3
A5
A7
OE
A
VCCA
A2
A4
A6
A8
A
PW PACKAGE
(TOP VIEW)
VCCA
2
19
A2
A3
A4
A5
3
18
4
17
5
16
6
15
A6
A7
7
14
8
13
9
12
10
11
A8
OE
B1
VCCB
B2
B3
B4
B5
B6
B7
B8
GND
VCCA
A2
A3
A4
A5
A6
A7
A8
B1
20
1
20
4
19 VCCB
18 B2
17 B3
5
6
16 B4
15 B5
7
8
14 B6
13 B7
2
3
12 B8
9
10
11
GND
1
OE
A1
A1
RGY PACKAGE
(TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
This 8-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.
When the output-enable (OE) input is low, all outputs are placed in the high-impedance state.
The TXB0101 is desinged so that the OE input circuit is supplied by VCCA.
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 © 2006–2007, Texas Instruments Incorporated
TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
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.
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.
ORDERING INFORMATION
PACKAGE (1)
TA
–40°C to 85°C
(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
QFN – RGY
Reel of 1000
TXB0108RGYR
YE08
TSSOP – PW
Reel of 2000
TXB0108PWR
YE08
VFBGA – GXY
Reel of 2500
TXB0108GXYR
YE08
VFBGA – ZXY (Pb-free)
Reel of 2500
TXB0108ZXYR
YE08
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
PIN DESCRIPTION
2
NO.
NAME
1
A1
FUNCTION
2
VCCA
3
A2
Input/output 2. Referenced to VCCA.
4
A3
Input/output 3. Referenced to VCCA.
5
A4
Input/output 4. Referenced to VCCA.
6
A5
Input/output 5. Referenced to VCCA.
7
A6
Input/output 6. Referenced to VCCA.
8
A7
Input/output 7. Referenced to VCCA.
9
A8
Input/output 8. Referenced to VCCA.
10
OE
Output enable. Pull OE low to place all outputs in 3-state mode.
Referenced to VCCA.
11
GND
12
B8
Input/output 8. Referenced to VCCB.
13
B7
Input/output 7. Referenced to VCCB.
14
B6
Input/output 6. Referenced to VCCB.
15
B5
Input/output 5. Referenced to VCCB.
16
B4
Input/output 4. Referenced to VCCB.
17
B3
Input/output 3. Referenced to VCCB.
18
B2
Input/output 2. Referenced to VCCB.
19
VCCB
20
B1
Input/output 1. Referenced to VCCA.
A-port supply voltage. 1.1 V ≤ VCCA ≤ 3.6 V, VCCA ≤ VCCB.
Ground
B-port supply voltage. 1.65 V ≤ VCCB ≤ 5.5 V.
Input/output 1. Referenced to VCCB.
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TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
TYPICAL OPERATING CIRCUIT
1.8 V
3.3 V
VCCA
VCCB
OE
TXB0108
1.8 -V
System
Controller
Data
A1
A2
B1
B2
A3
A4
A5
A6
A7
A8
B3
B4
B5
B6
B7
B8
3.3-V
System
Data
Absolute Maximum Ratings (1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
VCCA
Supply voltage range
–0.5
4.6
V
VCCB
Supply voltage range
–0.5
6.5
V
range (2)
–0.5
6.5
V
–0.5
6.5
V
VI
Input voltage
VO
Voltage range applied to any output in the high-impedance or power-off state (2)
A inputs
–0.5 VCCA + 0.5
B inputs
–0.5 VCCB + 0.5
UNIT
VO
Voltage range applied to any output in the high or low state (2) (3)
IIK
Input clamp current
VI < 0
–50
mA
IOK
Output clamp current
VO < 0
–50
mA
IO
Continuous output current
±50
mA
±100
mA
Continuous current through VCCA, VCCB, or GND
θJA
Package thermal impedance
GXY/ZXY package (4)
78
PW package (4)
83
RGY
Tstg
(1)
(2)
(3)
(4)
(5)
package (5)
Storage temperature range
V
°C/W
37
–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.
The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.
The value of VCCA and VCCB are provided in the recommended operating conditions table.
The package thermal impedance is calculated in accordance with JESD 51-7.
The package thermal impedance is calculated in accordance with JESD 51-5.
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3
TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
Recommended Operating Conditions (1) (2)
VCCA
VCCA
VCCB
High-level input voltage
VIL
Low-level input voltage
∆t/∆v
Input transition
rise or fall rate
(1)
(2)
(3)
4
Supply voltage
VIH
TA
VCCB
Data inputs
OE
1.2 V to 3.6 V
Data inputs
1.2 V to 5.5 V
OE
1.2 V to 3.6 V
A-port inputs
1.2 V to 3.6 V
B-port inputs
1.2 V to 3.6 V
1.65 V to 5.5 V
1.65 V to 5.5 V
MIN
MAX
1.2
3.6
1.65
5.5
VCCI x 0.65 (3)
VCCI
VCCA x 0.65
5.5
0
VCCI x 0.35 (3)
0
VCCA x 0.35
1.65 V to 5.5 V
40
1.65 V to 3.6 V
40
4.5 V to 5.5 V
30
Operating free-air temperature
–40
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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85
UNIT
V
V
V
ns/V
°C
TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
Electrical Characteristics
(1) (2)
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST
CONDITIONS
VCCA
TA = 25°C
VCCB
MIN
1.2 V
IOH = –20 µA
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
IOZ
1.4 V to 3.6 V
0.4
VCCB – 0.4
V
V
µA
±2
A port
0V
0 V to 5.5 V
±1
±2
B port
0 V to 3.6 V
0V
±1
±2
1.2 V to 3.6 V
1.65 V to 5.5 V
±1
±2
OE = GND
VI = VCCI or GND,
IO = 0
1.4 V to 3.6 V
0V
5.5 V
–2
ICCA + ICCB
VI = VCCI or GND,
IO = 0
1.2 V
ICCZA
VI = VCCI or GND,
IO = 0,
OE = GND
ICCZB
VI = VCCI or GND,
IO = 0,
OE = GND
A port
B port
5
2
ICCB
OE
1.65 V to 5.5 V
0V
1.2 V
0V
0V
5.5 V
1.4 V to 3.6 V
5
–2
1.65 V to 5.5 V
10
0.05
1.65 V to 5.5 V
5
1.2 V
1.4 V to 3.6 V
1.2 V to 3.6 V
1.2 V to 3.6 V
µA
µA
2
3.5
1.2 V
1.4 V to 3.6 V
µA
3.4
1.65 V to 5.5 V
3.6 V
µA
0.06
3.6 V
1.4 V to 3.6 V
V
0.4
±1
VI = VCCI or GND,
IO = 0
(1)
(2)
0.9
1.65 V to 5.5 V
A or B port
UNIT
V
1.2 V to 3.6 V
ICCA
Cio
MAX
VCCA – 0.4
1.2 V
1.2 V
CI
MIN
1.4 V to 3.6 V
OE
Ioff
–40°C to 85°C
MAX
1.1
VOHA
II
TYP
3.3
1.65 V to 5.5 V
5
1.65 V to 5.5 V
1.65 V to 5.5 V
5
5.5
5
6.5
8
10
µA
µA
µA
pF
pF
VCCI is the supply voltage associated with the input port.
VCCO is the supply voltage associated with the output port.
Timing Requirements
TA = 25°C, VCCA = 1.2 V
Data rate
tw
Pulse duration
Data inputs
VCCB = 1.8 V
VCCB = 2.5 V
VCCB = 3.3 V
VCCB = 5 V
TYP
TYP
TYP
TYP
20
20
20
20
Mbps
50
50
50
50
ns
UNIT
Timing Requirements
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
50
Data inputs
20
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MAX
VCCB = 3.3 V
± 0.3 V
MIN
50
20
MAX
VCCB = 5 V
± 0.5 V
MIN
50
20
50
20
UNIT
MAX
Mbps
ns
5
TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
Timing Requirements
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
MAX
Data rate
tw
VCCB = 2.5 V
± 0.2 V
MIN
MAX
52
Pulse duration
Data inputs
VCCB = 3.3 V
± 0.3 V
MIN
MAX
60
19
VCCB = 5 V
± 0.5 V
MIN
60
17
60
17
UNIT
MAX
17
Mbps
ns
Timing Requirements
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
MAX
Data rate
tw
VCCB = 3.3 V
± 0.3 V
MIN
MAX
70
Pulse duration
Data inputs
VCCB = 5 V
± 0.5 V
MIN
100
14
100
10
UNIT
MAX
10
Mbps
ns
Timing Requirements
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
VCCB = 5 V
± 0.5 V
MAX
MIN
100
Pulse duration
Data inputs
10
UNIT
MAX
100
10
Mbps
ns
Switching Characteristics
TA = 25°C, VCCA = 1.2 V
PARAMETER
tpd
TO
(OUTPUT)
VCCB = 1.8 V
VCCB = 2.5 V
VCCB = 3.3 V
VCCB = 5 V
TYP
TYP
TYP
TYP
A
B
9.5
7.9
7.6
8.5
B
A
9.2
8.8
8.4
8
A
1
1
1
1
B
1
1
1
1
A
20
17
17
18
B
20
16
15
15
A-port rise and fall times
4.1
4.4
4.1
3.9
ns
ns
ten
OE
tdis
OE
trA, tfA
UNIT
ns
µs
ns
trB, tfB
B-port rise and fall times
5
5
5.1
5.1
tSK(O)
Channel-to-channel skew
2.4
1.7
1.9
7
ns
20
20
20
20
Mbps
Max data rate
6
FROM
(INPUT)
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TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
Switching Characteristics
over recommended operating free-air temperature range, VCCA = 1.5 V ± 0.1 V (unless otherwise noted)
PARAMETER
tpd
FROM
(INPUT)
TO
(OUTPUT)
A
B
ten
OE
tdis
OE
VCCB = 1.8 V
± 0.15 V
VCCB = 2.5 V
± 0.2 V
VCCB = 3.3 V
± 0.3 V
MIN
MAX
MIN
MAX
MIN
B
1.4
12.9
1.2
10.1
A
0.9
14.2
0.7
12
VCCB = 5 V
± 0.5 V
UNIT
MAX
MIN
MAX
1.1
10
0.8
9.9
0.4
11.7
0.3
13.7
A
1
1
1
1
B
1
1
1
1
ns
µs
A
6.6
33
6.4
25.3
6.1
23.1
5.9
24.6
B
6.6
35.6
5.8
25.6
5.5
22.1
5.6
20.6
A-port rise and fall times
0.8
6.5
0.8
6.3
0.8
6.3
0.8
6.3
ns
trB, tfB
B-port rise and fall times
1
7.3
0.7
4.9
0.7
4.6
0.6
4.6
ns
tSK(O)
Channel-to-channel skew
trA, tfA
Max data rate
2.6
1.9
50
50
1.6
50
1.3
50
ns
ns
Mbps
Switching Characteristics
over recommended operating free-air temperature range, VCCA = 1.8 V ± 0.15 V (unless otherwise noted)
PARAMETER
tpd
FROM
(INPUT)
TO
(OUTPUT)
A
B
ten
OE
tdis
OE
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
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
B
1.6
11
1.4
7.7
1.3
6.8
1.2
6.5
A
1.5
12
1.2
8.4
0.8
7.6
0.5
7.1
A
1
1
1
1
B
1
1
1
1
ns
µs
A
5.9
26.7
5.6
21.6
5.4
18.9
4.8
18.7
B
6.1
33.9
5.2
23.7
5
19.9
5
17.6
A-port rise and fall times
0.7
5.1
0.7
5
1
5
0.7
5
ns
trB, tfB
B-port rise and fall times
1
7.3
0.7
5
0.7
3.9
0.6
3.8
ns
tSK(O)
Channel-to-channel skew
trA, tfA
Max data rate
0.8
52
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0.7
60
0.6
60
0.6
60
ns
ns
Mbps
7
TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
Switching Characteristics
over recommended operating free-air temperature range, VCCA = 2.5 V ± 0.2 V (unless otherwise noted)
PARAMETER
tpd
FROM
(INPUT)
TO
(OUTPUT)
A
B
ten
OE
tdis
OE
VCCB = 2.5 V
± 0.2 V
VCCB = 3.3 V
± 0.3 V
MIN
MAX
B
1.1
A
1
VCCB = 5 V
± 0.5 V
UNIT
MIN
MAX
MIN
MAX
6.4
1
5.3
0.9
4.7
7
0.6
5.6
0.3
4.4
A
1
1
1
B
1
1
1
ns
µs
A
5
16.9
4.9
15
4.5
13.8
B
4.8
21.8
4.5
17.9
4.4
15.2
A-port rise and fall times
0.8
3.6
0.6
3.6
0.5
3.5
ns
trB, tfB
B-port rise and fall times
0.6
4.9
0.7
3.9
0.6
3.2
ns
tSK(O)
Channel-to-channel skew
trA, tfA
0.4
Max data rate
0.3
70
0.3
100
100
ns
ns
Mbps
Switching Characteristics
over recommended operating free-air temperature range, VCCA = 3.3 V ± 0.3 V (unless otherwise noted)
PARAMETER
tpd
FROM
(INPUT)
TO
(OUTPUT)
A
B
ten
OE
tdis
OE
VCCB = 5 V
± 0.5 V
UNIT
MIN
MAX
MIN
MAX
B
0.9
4.9
0.8
4
A
0.5
5.4
0.2
4
A
1
1
B
1
1
ns
µs
A
4.5
13.9
4.1
12.4
B
4.1
17.3
4
14.4
A-port rise and fall times
0.5
3
0.5
3
ns
trB, tfB
B-port rise and fall times
0.7
3.9
0.6
3.2
ns
tSK(O)
Channel-to-channel skew
trA, tfA
Max data rate
8
VCCB = 3.3 V
± 0.3 V
0.4
100
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0.3
100
ns
ns
Mbps
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TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
Operating Characteristics
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
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
9
8
7
7
7
7
TYP
8
12
11
11
11
11
11
11
35
26
27
27
27
27
28
26
19
18
18
18
20
21
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
0.03
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pF
pF
9
TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
PRINCIPLES OF OPERATION
Applications
The TXB0108 can be used in level-translation applications for interfacing devices or systems operating at
different interface voltages with one another.
Architecture
The TXB0108 architecture (see Figure 1) 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 TXB0108 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.
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 70Ω at VCCO = 1.2 V to 1.8 V,
50Ω at VCCO = 1.8 V to 3.3 V and 40Ω 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 1. Architecture of TXB0108 I/O Cell
Input Driver Requirements
Typical IIN vs VIN characteristics of the TXB0108 are shown in Figure 2. For proper operation, the device driving
the data I/Os of the TXB0108 must have drive strength of at least ±2 mA.
10
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TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
PRINCIPLES OF OPERATION (continued)
IIN
VT/4 kW
VIN
–(VD – VT)/4 kW
A. VT is the input threshold voltage of the TXB0108 (typically VCCI/2).
B. VD is the supply voltage of the external driver.
Figure 2. Typical IIN vs VIN Curve
Power Up
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 TXB0108 has circuitry that disables all
output ports when either VCC is switched off (VCCA/B = 0 V).
Enable and Disable
The TXB0108 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.
Pullup or Pulldown Resistors on I/O Lines
The TXB0108 is designed to drive capacitive loads of up to 70 pF. The output drivers of the TXB0108 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 TXB0108.
For the same reason, the TXB0108 should not be used in applications such as I2C or 1-Wire where an
open-drain driver is connected on the bidirectional data I/O. For these applications, use a device from the TI
TXS01xx series of level translators.
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11
TXB0108
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES643A – NOVEMBER 2006 – REVISED JANUARY 2007
PARAMETER MEASUREMENT INFORMATION
2 × VCCO
From Output
Under Test
50 kW
From Output
Under Test
15 pF
1 MW
Open
50 kW
15 pF
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
0V
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 3. Load Circuits and Voltage Waveforms
12
VCCI/2
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
A.
B.
C.
D.
E.
F.
G.
VCCI/2
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PACKAGE OPTION ADDENDUM
www.ti.com
5-Feb-2007
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
TXB0108PWR
ACTIVE
TSSOP
PW
20
2000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
TXB0108RGYR
ACTIVE
QFN
RGY
20
1000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1YEAR
Lead/Ball Finish
MSL Peak Temp (3)
(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 - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
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.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry 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
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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
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