TI TXB0104PWR

TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
FEATURES
GXU OR ZXU PACKAGE
(BOTTOM VIEW)
A
B
TERMINAL ASSIGNMENTS
(GXU/ZXU Package)
C
1
2
3
4
A
B
C
1
A1
VCCB
B1
2
A2
VCCA
B2
3
A3
OE
B3
4
A4
GND
B4
RGY PACKAGE
(TOP VIEW)
D OR PW PACKAGE
(TOP VIEW)
VCCA
1
14
VCCB
A1
2
13
B1
A2
3
12
B2
A3
4
11
B3
A4
5
10
B4
NC
GND
6
9
7
8
NC
OE
A1
A2
A3
A4
NC
NC − No internal connection
VCCB
•
ESD Protection Exceeds JESD 22
– A Port
• 2500-V Human-Body Model (A114-B)
• 200-V Machine Model (A115-A)
• 1500-V Charged-Device Model (C101)
– B Port
• ±15-kV Human-Body Model (A114-B)
• 200-V Machine Model (A115-A)
• 1500-V Charged-Device Model (C101)
1
14
2
13 B1
3
4
12 B2
5
6
10 B4
9 NC
11 B3
7
8
OE
•
•
•
•
VCCA
•
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
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
GND
•
NC − No internal connection
DESCRIPTION/ORDERING INFORMATION
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.
When the output-enable (OE) input is low, all outputs are placed in the high-impedance state.
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.
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, Texas Instruments Incorporated
TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
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
UFBGA – GXU
UFBGA – ZXU (Pb-Free)
–40°C to 85°C
(1)
ORDERABLE PART NUMBER
Tape and reel
TXB0104GXUR
___ _
TXB0104ZXUR
QFN – RGY
Tape and reel
TXB0104RGYR
SOIC – D
Tape and reel
TXB0104DR
TSSOP – PW
Tape and reel
TXB0104PWR
TOP-SIDE MARKING
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
PIN DESCRIPTION
D, PW, OR RGY
PIN NO.
GXU OR ZXU
BALL NO.
NAME
1
B2
VCCA
2
A1
A1
Input/output 1. Referenced to VCCA.
3
A2
A2
Input/output 2. Referenced to VCCA.
4
A3
A3
Input/output 3. Referenced to VCCA.
5
A4
A4
Input/output 4. Referenced to VCCA.
NC
No connection. Not internally connected.
6
A-port supply voltage 1.2 V ≤ VCCA ≤ 3.6 V and VCCA ≤ VCCB.
7
B4
GND
8
B3
OE
3-state output-mode enable. Pull OE low to place all outputs in
3-state mode. Referenced to VCCA.
NC
No connection. Not internally connected.
9
2
FUNCTION
Ground
10
C4
B4
Input/output 4. Referenced to VCCB.
11
C3
B3
Input/output 3. Referenced to VCCB.
12
C2
B2
Input/output 2. Referenced to VCCB.
13
C1
B1
Input/output 1. Referenced to VCCB.
14
B1
VCCB
B-port supply voltage 1.65 V ≤ VCCB ≤ 5.5 V.
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TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
Absolute Maximum Ratings
(1)
over operating free-air temperature range (unless otherwise noted)
VCCA
VCCB
Supply voltage range
MIN
MAX
–0.5
4.6
–0.5
6.5
UNIT
V
VI
Input voltage range (2)
–0.5
6.5
V
VO
Voltage range applied to any output in the high-impedance or power-off state (2)
–0.5
6.5
V
A port
–0.5
VCCA + 0.5
B port
–0.5
VCCB + 0.5
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
D package (4)
θJA
86
GXU/ZXU package (4)
Package thermal impedance
PW
TBD
package (4)
(1)
(2)
(3)
(4)
(5)
Storage temperature range
°C/W
113
RGY package (5)
Tstg
V
47
–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.
Recommended Operating Conditions (1) (2)
VCCA
VCCA
VCCB
Supply voltage
VIH
High-level input voltage
VIL
Low-level input voltage
∆t/∆v
Input transition
rise or fall rate
TA
(1)
(2)
(3)
VCCB
MIN
MAX
1.2
3.6
1.65
5.5
Data inputs
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
A-port inputs
1.2 V to 3.6 V
1.65 V to 5.5 V
40
1.65 V to 3.6 V
40
4.5 V to 5.5 V
30
B-port inputs
1.2 V to 3.6 V
Operating free-air temperature
–40
85
UNIT
V
V
V
ns/V
°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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3
TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
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
MIN
1.4 V to 3.6 V
MAX
1.2 V
0.9
0.4
VCCB – 0.4
V
V
µA
1.65 V to 5.5 V
±1
±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
1.2 V
1.65 V to 5.5 V
1.4 V to 3.6 V
1.65 V to 5.5 V
5
3.6 V
0V
2
0V
5.5 V
-2
OE = GND
VI = VCCI or GND,
IO = 0
ICCA
1.2 V
1.65 V to 5.5 V
ICCB
1.4 V to 3.6 V
1.65 V to 5.5 V
5
3.6 V
0V
-2
0V
5.5 V
ICCA + ICCB
VI = VCCI or GND,
IO = 0
1.2 V
1.65 V to 5.5 V
1.4 V to 3.6 V
1.65 V to 5.5 V
VI = VCCI or GND,
IO = 0,
OE = GND
1.2 V
1.65 V to 5.5 V
ICCZA
1.4 V to 3.6 V
1.65 V to 5.5 V
VI = VCCI or GND,
IO = 0,
OE = GND
1.2 V
1.65 V to 5.5 V
ICCZB
1.4 V to 3.6 V
1.65 V to 5.5 V
1.2 V to 3.6 V
1.65 V to 5.5 V
Cio
(1)
(2)
OE
A port
B port
1.2 V to 3.6 V
µA
µA
0.06
VI = VCCI or GND,
IO = 0
Ci
V
0.4
1.2 V to 3.6 V
A or B port
UNIT
V
VCCA – 0.4
1.4 V to 3.6 V
OE
Ioff
–40°C to 85°C
MAX
1.1
VOHA
II
TYP
µA
3.4
µA
2
3.5
10
0.05
5
3.3
5
1.65 V to 5.5 V
3
4
5
6
11
14
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
VCCB = 1.8 V
VCCB = 2.5 V
VCCB = 3.3 V
VCCB = 5 V
TYP
TYP
TYP
TYP
Data rate
tw
Pulse duration
Data inputs
UNIT
20
20
20
20
Mbps
50
50
50
50
ns
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
4
Pulse duration
MAX
VCCB = 2.5 V
± 0.2 V
MIN
40
Data inputs
25
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MAX
VCCB = 3.3 V
± 0.3 V
MIN
40
25
MAX
VCCB = 5 V
± 0.5 V
MIN
40
25
40
25
UNIT
MAX
Mbps
ns
TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
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
60
Pulse duration
Data inputs
VCCB = 3.3 V
± 0.3 V
MIN
MAX
60
17
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
100
Pulse duration
Data inputs
VCCB = 5 V
± 0.5 V
MIN
100
10
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
FROM
(INPUT)
TO
(OUTPUT)
VCCB = 1.8 V
VCCB = 2.5 V
VCCB = 3.3 V
VCCB = 5 V
TYP
TYP
TYP
TYP
A
B
6.9
5.7
5.3
5.5
B
A
7.4
6.4
6
5.8
A
1
1
1
1
B
1
1
1
1
A
18
15
14
14
B
20
17
16
16
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
tSK(O)
Channel-to-channel skew
0.4
0.5
0.5
1.4
ns
20
20
20
20
Mbps
PARAMETER
tpd
ten
OE
tdis
OE
trA, tfA
Max data rate
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UNIT
ns
µs
ns
5
TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
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
5.9
31
5.7
25.9
5.6
23
5.7
22.4
B
5.4
30.3
4.9
22.8
4.8
20
4.9
19.5
A-port rise and fall times
1.4
5.1
1.4
5.1
1.4
5.1
1.4
5.1
ns
trB, tfB
B-port rise and fall times
0.9
4.5
0.6
3.2
0.5
2.8
0.4
2.7
ns
tSK(O)
Channel-to-channel skew
trA, tfA
Max data rate
0.5
0.5
40
40
0.5
40
0.5
40
ns
ns
Mbps
Switching Characteristics
over recommended operating free-air temperature range, VCCA = 1.8 V ± 0.15 V (unless otherwise noted)
PARAMETER
tpd
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
1.3
8.4
1
7.6
0.9
7.1
A
1
1
1
1
B
1
1
1
1
ns
µs
A
5.9
31
5.1
21.3
5
19.3
5
17.4
B
5.4
30.3
4.4
20.8
4.2
17.9
4.3
16.3
A-port rise and fall times
1
4.2
1.1
4.1
1.1
4.1
1.1
4.1
ns
trB, tfB
B-port rise and fall times
0.9
3.8
0.6
3.2
0.5
2.8
0.4
2.7
ns
tSK(O)
Channel-to-channel skew
trA, tfA
Max data rate
6
FROM
(INPUT)
0.5
60
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0.5
60
0.5
60
0.5
60
ns
ns
Mbps
TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
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
1.2
VCCB = 5 V
± 0.5 V
UNIT
MIN
MAX
MIN
MAX
6.3
1
5.2
0.9
4.7
6.6
1.1
5.1
0.9
4.4
A
1
1
1
B
1
1
1
ns
µs
A
5.1
21.3
4.6
15.2
4.6
13.2
B
4.4
20.8
3.8
16
3.9
13.9
A-port rise and fall times
0.8
3
0.8
3
0.8
3
ns
trB, tfB
B-port rise and fall times
0.7
2.6
0.5
2.8
0.4
2.7
ns
tSK(O)
Channel-to-channel skew
trA, tfA
0.5
Max data rate
0.5
100
0.5
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 = 3.3 V
± 0.3 V
VCCB = 5 V
± 0.5 V
UNIT
MIN
MAX
MIN
MAX
B
0.9
4.7
0.8
4
A
1
4.9
0.9
3.8
A
1
1
B
1
1
ns
µs
A
4.6
15.2
4.3
12.1
B
3.8
16
3.4
13.2
A-port rise and fall times
0.7
2.5
0.7
2.5
ns
trB, tfB
B-port rise and fall times
0.5
2.1
0.4
2.7
ns
tSK(O)
Channel-to-channel skew
trA, tfA
Max data rate
0.5
100
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0.5
100
ns
ns
Mbps
7
TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
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
8
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
7.8
10
9
8
8
8
TYP
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
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pF
pF
TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
PRINCIPLES OF OPERATION
Applications
The TXB0104 can be used in level-translation applications for interfacing devices or systems operating at
different interface voltages with one another.
Architecture
The TXB0104 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 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.
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.
VCCA
VCCB
One
Shot
T1
4k
One
Shot
T2
A
B
One
Shot
T3
4k
T4
One
Shot
Figure 1. Architecture of TXB0104 I/O Cell
Input Driver Requirements
Typical IIN vs VIN characteristics of the TXB0104 are shown in Figure 2. For proper operation, the device driving
the data I/Os of the TXB0104 must have drive strength of at least ±2 mA.
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TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
PRINCIPLES OF OPERATION (continued)
IIN
VT/4 k
VIN
–(VD – VT)/4 k
A. VT is the input threshold voltage of the TXB0104 (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 TXB0104 has circuitry that disables all
output ports when either VCC is switched off (VCCA/B = 0 V).
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 acutally 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 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, 1-Wire, or an MMC card
interface 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.
10
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TXB0104
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTO DIRECTION SENSING AND ±15-kV ESD PROTECTION
www.ti.com
SCES650 – APRIL 2006
PARAMETER MEASUREMENT INFORMATION
2 × VCCO
From Output
Under Test
50 k
From Output
Under Test
15 pF
1 M
Open
50 k
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 VCCO
0.1 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: PRR10 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
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11
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