TI TMDS141

TMDS141
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SLLS737B – JUNE 2006 – REVISED APRIL 2007
HDMI HIDER
FEATURES
•
•
•
•
•
•
Supports 2.25 Gbps Signaling Rate for 480i/p,
720i/p, and 1080i/p Resolution to 12-Bit Color
Depth
Compatible with HDMI 1.3a
Integrated Receiver Termination
8-dB Equalizer Compensates Losses from 5-m
or Longer HDMI Cables
Selectable Output De-Emphasis Supports 1-m
HDMI Transmission
I2C Repeater Isolates Bus Capacitance at Both
Ends
•
•
•
•
•
High Impedance Outputs When Disabled
TMDS Inputs HBM ESD Protection Exceeds 6
kV
3.3-V Supply Operation
40-Pin QFN Package (RHA)
ROHS Compatible and 260°C Reflow Rated
APPLICATIONS
•
•
•
•
•
•
Digital TV
DVD Player
Set-Top-Box
Audio Video Receiver
Digital Projector
DVI or HDMI cable
DESCRIPTION
The TMDS141 HDMI hider is designed to accommodate a 1-m HDMI cable between a HDMI connector and a
receiver. The internal cable causes signal distortion to high-speed TMDS signals, as well as increasing
capacitance to the DDC channel. Each TMDS141 contains four TMDS repeaters to transmit digital content with
signaling rates of up to 2.25-Gbps, and an I2C repeater to link extended display identification data (EDID)
reading and high-bandwidth digital content protection (HDCP) key exchange under I2C standard mode
operations.
The device includes four TMDS compliant differential receivers with 50-Ω termination resistors and 3.3-V
termination voltage integrated at each receiver input pin. External terminations are not required. A built-in
frequency response equalization circuit, 8 dB at 825 MHz, compensates inter-symbol interference (ISI) losses
from a 5-m or longer input cable link.
The device also includes four TMDS compliant differential drivers. A precision resistor is connected externally
from the VSADJ pin to ground for setting the differential output voltage to be compliant with the TMDS standard.
A selectable de-emphasis circuit is available via the PRE input to drive long PCB traces or cables. When PRE is
high, the 3.5-dB high frequency gain offsets the losses due to the FR4 trace. PRE can be left open or kept low
when the de-emphasis function is not desired.
TYPICAL APPLICATION
Digital TV
Interface
Unit
Audiovisual
Processing
Unit
HDMI
Rx
TMDS
141
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
TMDS141
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SLLS737B – JUNE 2006 – REVISED APRIL 2007
With standard TMDS terminations at the outputs, all TMDS outputs are forced high-impedance when OE is set
high. The I2C repeater isolates the buses without accumulating the capacitance of both sides. It allows DDC
capacitance to be controlled under the desired load. The I2C outputs are high-impedance when device supply
voltage is less than 1.5 V or I2CEN is low. The OVS pin, output voltage select, provides the flexibility of
adjusting the output voltage level of the TSCL and TSDA side to optimize noise margins while interfacing to
different HDMI receivers. The device is characterized for operation from 0°C to 70°C.
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.
FUNCTIONAL BLOCK DIAGRAM
VSADJ
OE
PRE
V
CC
RINT
RX2
TX2
RX2
TMDS
Receiver
w/EQ
TMDS
Driver
TMDS
Receiver
w/EQ
TMDS
Driver
TMDS
Receiver
w/EQ
TMDS
Driver
TMDS
Receiver
w/EQ
TMDS
Driver
TX2
V
CC
RINT
RX1
TX1
RX1
TX1
V
CC
RINT
RX0
TX0
RX0
TX0
V
CC
RINT
RXC
RXC
TXC
RSCL
TSCL
RSDA
TSDA
I2CEN
OVS
2
TXC
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22
21
VCC
TSDA
TSCL
GND
23
25
24
27
26
RX1
VCC
28
VSADJ
VCC
RX0
RX0
GND
RX1
30
31
29
GND
RXC
RXC
RSCL
RSDA
VCC
GND
OVS
RHA PACKAGE
(TOP VIEW)
GND
TXC
TXC
20
14
38
13
39
12
40
11
TX1
VCC
PRE
GND
TX2
Tx2
6
5
3
4
9
15
37
VCC
TX0
TX0
GND
TX1
10
36
8
16
7
17
35
1
18
34
2
33
RX2
GND
VCC
I2CEN
OE
19
Rx2
32
TERMINAL FUNCTIONS
TERMINAL
NAME
RX2, RX1, RX0, RXC
NO.
1, 38, 35, 32
I/O
DESCRIPTION
I
TMDS Negative inputs
RX2, RX1, RX0, RXC
2, 39, 36, 33
I
TMDS Positive inputs
TX2, TX1, TX0, TXC
10, 13, 16, 19
O
TMDS Negative outputs
TX2, TX1, TX0, TXC
9, 12, 15, 18
O
TMDS Positive outputs
RSCL
29
I/O
DDC Bus clock line to source
RSDA
28
I/O
DDC Bus data line to source
TSCL
22
I/O
DDC Bus clock line to sink
TSDA
23
I/O
DDC Bus data line to sink
VSADJ
30
I
TMDS Compliant voltage swing control
I2CEN
5
I
I2C Repeater enable
Low: High-Z
High: Active
OVS
25
I
TSCL/TSDA Output voltage select
OE
6
I
TMDS Output enable
Low: Active
High: High-Z
PRE
7
I
TMDS Output de-emphasis adjustment
Low: 0 dB
High: 3.5 dB
VCC
4, 11, 17, 24, 27,
34, 40
Power supply
GND
3, 8, 14, 20, 21,
26, 31, 37
Ground
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EQUIVALENT INPUT AND OUTPUT SCHEMATIC DIAGRAMS
TMDS Input Stage
VCC
VCC
Y
25W
Z
25W
50W
Control Input Stage
TMDS Output Stage
50W
A
B
PRE
OE
I2CEN
400W
10mA
2
2
T-Side I C Input/Output Stage
R-Side I C Input/Output Stage
RSCL
RSDA
400W
VCC
VCC
VCC
TSCL
TSDA
Control Input Stage
VCC
VCC
400W
OVS
400W
VOL
ORDERING INFORMATION (1)
(1)
4
PART NUMBER
PART MARKING
PACKAGE
TMDS141RHAR
TMDS141
40-PIN QFN Tape/Reel
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
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ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted) (1)
UNIT
Supply voltage range (2)
VCC
–0.5 V to 4 V
RX, RX
Voltage range
2.0 V to 4 V
TX, TX, PRE, VSADJ, OE, I2CEN, OVS, HPDn
–0.5V to 4 V
RSCL, RSDA, TSCL, TSDA
–0.5 V to 6 V
Electrostatic
discharge
±6 kV
RX, RX
Human body model (3)
±4 kV
All pins
Charged-device model (4) (all pins)
±1500 V
(5)
± 200 V
Machine model
(all pins)
Continuous power dissipation
(1)
(2)
(3)
(4)
(5)
See Dissipation Rating Table
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 voltage values, except differential I/O bus voltages, are with respect to network ground terminal.
Tested in accordance with JEDEC Standard 22, Test Method A114-B
Tested in accordance with JEDEC Standard 22, Test Method C101-A
Tested in accordance with JEDEC Standard 22, Test Method A115-A
DISSIPATION RATINGS
(1)
(2)
(3)
(1)
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
PACKAGE
PCB JEDEC STANDARD
TA ≤ 25°C
40-QFN RHA
Low-K (2)
839.7 mW
8.39 mW/°C
461.8 mW
40-QFN RHA
High-K (3)
3030.3 mW
30.3 mW/°C
1666.6mW
This is the inverse of the junction-to-ambient thermal resistance when board-mounted and with no air flow.
In accordance with the Low-K thermal metric definitions of EIA/JESD51-3
In accordance with the High-K thermal metric definitions of EIA/JESD51-7
THERMAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
RθJB
Junction-to-board thermal
resistance
30.9
6
°C/W
RθJC
Junction- to-case thermal
resistance
32.4
2
°C/W
PD
Device power dissipation
VIH = VCC, VIL = VCC - 0.5 V, RT = 50 Ω,
VCC = AVCC = 3.3V, Rvsadj = 4.64 kΩ
PRE = Low
344
370
PRE = High
381
407
VIH = VCC, VIL = VCC - 0.6 V, RT = 50 Ω,
VCC = 3.6 V, AVCC = 3.3V, Rvsadj = 4.6 kΩ
PRE = Low
484
PRE = High
526
mW
mW
RECOMMENDED OPERATING CONDITIONS
MIN
NOM
MAX
VCC
Supply voltage
3
3.3
3.6
UNIT
V
TA
Operating free-air temperature
0
70
°C
VCC–400
VCC+10
mV
TMDS DIFFERENTIAL PINS (RX/ RXC)
VIC
Input common mode voltage
VID
Receiver peak-to-peak differential input voltage
150
1560
mVp-p
RVSADJ
Resistor for TMDS compliant voltage swing range
4.6
4.64
4.68
kΩ
AVCC
TMDS Output termination voltage, see Figure 1
3
3.3
3.6
V
RT
Termination resistance, see Figure 1
45
50
Signaling rate
0
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2.25
Ω
Gbps
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RECOMMENDED OPERATING CONDITIONS (continued)
MIN
NOM
MAX
UNIT
CONTROL PINS (PRE, OE, I2CEN)
VIH
LVTTL High-level input voltage
2
VCC
V
VIL
LVTTL Low-level input voltage
GND
0.8
V
CONTROL PINS (OVS)
VIH
LVTTL High-level input voltage
3
3.6
V
VIL
LVTTL Low-level input voltage
-0.5
0.5
V
I2C
PINS (TSCL, TSDA)
VIH
High-level input voltage
0.7VCC
5.5
V
VIL
Low-level input voltage
-0.5
0.3VCC
V
VICL
Low-level input voltage contention (1)
-0.5
0.4
V
I2C
PINS (RSCL, RSDA)
VIH
High-level input voltage
2.1
5.5
V
VIL
Low-level input voltage
-0.5
1.5
V
(1)
VIL specification is for the first low level seen by the SCL/SDA lines. VICL is for the second and subsequent low levels seen by the
TSCL/TSDA lines.
ELECTRICAL CHARACTERISTICS
over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
ICC
Supply current
VIH = VCC, VIL = VCC – 0.4 V, RT = 50 Ω,
AVCC = 3.3 V, RVSADJ = 4.64 kΩ,
1.65-Gbps HDMI data pattern,
165-MHz Pixel clock, PRE = Low
PD
Power dissipation
VIH = VCC, VIL = VCC – 0.4 V, RT = 50 Ω,
AVCC = 3.3 V, RVSADJ = 4.64 kΩ,
1.65-Gbps HDMI data pattern,
165-MHz Pixel clock, PRE = Low
MIN
TYP (1)
MAX
UNIT
108
130 (2)
mA
497 (2)
mW
TMDS DIFFERENTIAL PINS (TX, TXC)
VOH
Single-ended high-level output voltage
AVCC–10
AVCC+10
mV
VOL
Single-ended low-level output voltage
AVCC–600
AVCC–400
mV
Vswing
Single-ended output swing voltage
400
600
mV
VOD(O)
Overshoot of output differential voltage
VOD(U)
Undershoot of output differential voltage
∆VOC(SS)
Change in steady-state common-mode
output voltage between logic states
I(O)OFF
Single-ended standby output current
VOD(pp)
Peak-to-peak output differential voltage
VODE(SS)
Steady state output differential voltage
with de-emphasis
I(OS)
Short circuit output current
See Figure 4
VI(open)
Single-ended input voltage under high
impedance input or open input
II = 10 µA
RINT
Input termination resistance
VIN = 2.9 V
See Figure 2, AVCC = 3.3 V,
RT = 50 Ω
15% 2× Vswing
25% 2× Vswing
0 V ≤ VCC ≤ 1.5 V,
AVCC = 3.3 V, RT = 50 Ω
See Figure 3, PRE = High,
AVCC = 3.3 V, RT = 50 Ω
5
mV
–10
10
µA
800
1200
600
820
-12
12
mA
VCC–10
VCC+10
mV
45
50
mVp-p
55
Ω
CONTROL PINS (PRE, OE, I2CEN, OVS)
|IIH|
High-level digital input current
VIH = 2 V or VCC
-10
10
µA
|IIL|
Low-level digital input current
VIL = GND or 0.8 V
-10
10
µA
VI = 5.5 V
-50
50
VI = VCC
-10
10
VO = 3.6 V
-10
10
I2C
|Ilkg|
Input leakage current
|IOH|
High-level output current
(1)
(2)
6
PINS (TSCL, TSDA)
All typical values are at 25°C and with a 3.3-V supply.
The maximum rating is characterized under 3.6 V VCC and 600 mV VID.
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ELECTRICAL CHARACTERISTICS (continued)
over recommended operating conditions (unless otherwise noted)
PARAMETER
|IIL|
Low-level input current
TEST CONDITIONS
Low-level output voltage
IOL = 400 µA or 4 mA
TYP (1)
40
0.47
0.6
OVS = GND (3)
0.6
0.75
OVS = VCC (3)
0.75
0.95
OVS = NC (3)
VOL-VILC
Low-level input voltage below output
low-level voltage level
Ensured by design
OVS =
Input/output capacitance
UNIT
µA
V
70
GND (3)
220
OVS = VCC (3)
CIO
MAX
-40
OVS = NC (3)
VOL
MIN
VIL = GND
mV
370
VI = 5.0 V or 0 V, Freq = 100 kHz
25
VI = 3.0 V or 0 V, Freq = 100 kHz
10
pF
I2C PINS (RSCL, RSDA)
VI = 5.5 V
-50
50
VI = VCC
-10
10
High-level output current
VO = 3.6 V
-10
10
µA
Low-level input current
VIL = GND
-10
10
µA
Low-level output voltage
IOL = 4 mA
0.2
V
VI = 5.0 V or 0 V, Freq = 100 kHz
25
VI = 3.0 V or 0 V, Freq = 100 kHz
10
|Ilkg|
Input leakage current
|IOH|
|IIL|
VOL
CI
(3)
Input capacitance
µA
pF
The patent of the OVS pin is filed.
SWITCHING CHARACTERISTICS
over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP (1)
MAX
UNIT
TMDS DIFFERENTIAL PINS (TX/TXC)
tPLH
Propagation delay time, low-to-high-level output
100
500
ps
tPHL
Propagation delay time, high-to-low-level output
100
500
ps
tr
Differential output signal rise time (20% - 80%)
75
240
ps
tf
Differential output signal fall time (20% - 80%)
75
240
ps
See Figure 2, AVCC = 3.3 V,
RT = 50 Ω
tPLH|) (2)
tsk(p)
Pulse skew (|tPHL–
50
ps
tsk(D)
Intra-pair differential skew, see Figure 5
60
ps
tsk(o)
Inter-pair channel-to-channel output skew (3)
80
ps
tsk(pp)
Part-to-part skew
200
ps
ten
Enable time
10
ns
tdis
Disable time
10
ns
tjit(pp)
Peak-to-peak output jitter from TXC, residual jitter (5)
tjit(pp)
Peak-to-peak output jitter from TX0 - TX2, residual jitter (5)
tjit(pp)
Peak-to-peak output jitter from TXC, residual jitter (5)
tjit(pp)
Peak-to-peak output jitter from TX0 - TX2, residual jitter (5)
(1)
(2)
(3)
(4)
(5)
(4)
See Figure 6
See Figure 7, RXC = 165-MHz clock,
RX = 1.65-Gbps HDMI pattern,
Input: 5m 28AWG HDMI cable,
Output: 1m 28AWG HDMI cable, PRE = high
14
30
ps
30
88
ps
See Figure 7, RXC = 225-MHz clock,
RX = 2.25-Gbps HDMI pattern,
Input: 5m 28AWG HDMI cable,
Output: 1m 28AWG HDMI cable, PRE = high
25
42
88
ps
All typical values are at 25°C and with a 3.3-V supply.
tsk(p) is the magnitude of the time difference between tPLH and tPHL of a specified terminal.
tsk(o) is the magnitude of the difference in propagation delay times between any specified terminals of channel 2 to 4 of a device when
inputs are tied together.
tsk(pp) is the magnitude of the difference in propagation delay times between any specified terminals of channel 2 to 4 of two devices, or
between channel 1 of two devices, when both devices operate with the same source, the same supply voltages, at the same
temperature, and have identical packages and test circuits.
Jitter specifications are ensured by design and characterization and measured in BER-12
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SWITCHING CHARACTERISTICS (continued)
over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP (1)
MAX
UNIT
459
ns
120
ns
351
ns
120
ns
I2C PINS (RSCL, RSDA, TSCL, TSDA)
8
tPLH
Propagation delay time, low-to-high-level output
TSCL/TSDA to RSCL/RSDA
204
tPHL
Propagation delay time, high-to-low-level output
TSCL/TSDA to RSCL/RSDA
35
tPLH
Propagation delay time, low-to-high-level output
RSCL/RSDA to TSCL/TSDA
194
tPHL
Propagation delay time, high-to-low-level output
RSCL/RSDA to TSCL/TSDA
tr
TSCL/TSDA Output signal rise time
500
800
ns
tf
TSCL/TSDA Output signal fall time
30
72
ns
tr
RSCL/RSDA Output signal rise time
796
999
ns
tf
RSCL/RSDA Output signal fall time
20
72
ns
tset
Enable to start condition
thold
Enable after stop condition
See Figure 8, OVS = NC
See Figure 9
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100
ns
100
ns
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PARAMETER MEASUREMENT INFORMATION
AVcc
RT
RT
ZO = RT
TMDS
Driver
TMDS
Receiver
ZO = RT
Figure 1. Typical Termination for TMDS Output Driver
Vcc
RINT
RINT
RT
TX
RX
TMDS
Receiver
VIC
VRX
TMDS
Driver
CL
0.5 pF
AVcc
RT
VTX
TX
RX
VTX
VRX
VIC = | VRX − VRX|
Vswing = | VTX − VTX|
VRX
DC Coupled
Vcc
AC Coupled
Vcc+0.2 V
VRX
Vcc−0.4 V
Vcc−0.2 V
VIC
0.4 V
VIC
VID(pp)
0V
−0.4 V
t PHL
t
PLH
100%
80%
Vswing
VOD(O)
0V Differential
VOD(pp)
20%
0%
tf
VOC
tr
VOD(U)
nVOC(SS)
NOTE: PRE = low. All input pulses are supplied by a generator having the following characteristics: tr or tf < 100 ps, 100
MHz from Agilent 81250. CL includes instrumentation and fixture capacitance within 0.06 m of the D.U.T.
Measurement equipment provides a bandwidth of 20 GHz minimum.
Figure 2. TMDS Timing Test Circuit and Definitions
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PARAMETER MEASUREMENT INFORMATION (continued)
1 to N bit
1 bit
VODE(SS)
VOD(pp)
80%
20%
t PRE
Figure 3. De-Emphasis Output Voltage Waveforms and Duration Measurement Definitions
50 W
IOS
TMDS
Driver
50 W
+
_
0 V or 3.6 V
Figure 4. Short Circuit Output Current Test Circuit
VTX
50%
VTX
tsk(D)
Figure 5. Definition of Intra-Pair Differential Skew
VCC
1.5 V
OE
0V
TX
VOD = 75 mV
TX
VOD = -75 mV
VOD = 400 mV
0V
Hi-Z
tdis
VOD = -400 mV
ten
Figure 6. TMDS Enable and Disable Timing Definitions
10
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PARAMETER MEASUREMENT INFORMATION (continued)
AVcc
RT
Data +
Coax
Video
Data Patterm
Generator
Coax
800mVpp or
1200mVpp
Differential
SMA
SMA
RX
+EQ
SMA
28AWG
HDMI Cable
SMA
Jitter Test
Instrument
AVcc
RT
RT
SMA
RX
+EQ
Coax
Transmission media
HDMI cable
or
FR4 PCB trace
TMDS141
SMA
Coax
Clk-
OUT
SMA
Coax
Clk+
RT
Coax
Coax
OUT
SMA
Coax
Jitter Test
Instrument
XTP1
XTP2
XTP3
XTP4
10-12
A.
All jitters are measured in BER of
B.
The residual jitter reflects the total jitter measured at XTP4, subtract the total jitter at XTP1
Figure 7. Jitter Test Circuit
Vcc
VCC
3.3V + 10%
RSCL/RSDA
Input
Vcc/2
RL=4.7kW
PULSE
GENERATOR
0.1V
D.U.T.
RT
tPHL
C L=100pF
VIN
tPLH
80%
VOUT
TSCL/TSDA
Output
80%
20%
1.5V
20%
tf
3.3V +
10%
tr
VOL
Vcc
VCC
5V + 10%
TSCL/TSDA
Input
1.5V
RL=1.67kW
PULSE
GENERATOR
0.1V
D.U.T.
RT
tPHL
C L=400pF
VIN
80%
VOUT
RSCL/RSDA
Output
80%
20%
20%
tf
tr
5V +
10%
Vcc/2
VOL
Vcc
TSCL/TSDA
Input
0.5V
tPLH
5V +
10%
RSCL/RSDA
Output
Vcc/2
Figure 8. I2C Timing Test Circuit and Definition
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PARAMETER MEASUREMENT INFORMATION (continued)
START
STOP
V DD
SCL
0V
V DD
SDA
1.5V
0V
V DD
1.5V
I2CEN
0V
t SET
t HOLD
Figure 9. I2C Setup and Hold Definition
12
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TYPICAL CHARACTERISTICS
SUPPLY CURRENT
vs
FREE-AIR TEMPERATURE
120
120
110
110
100
100
90
ICC - Supply Current - mA
ICC - Supply Current - mA
SUPPLY CURRENT
vs
FREQUENCY
OE = Low, PRE = High
80
70
OE = Low, PRE = Low
60
50
OE = High, PRE = Low
40
30
20
10
VCC = AVCC = 3.3 V, RT = 50 W,
RVSADJ = 4.64 kW, TA = 25°C,
VID(PP) = 1200 mVp-p
80
70
60
50
40
30
VCC = AVCC = 3.3 V, RT = 50 W,
20
RVSADJ = 4.64 kW, VID(PP) = 1200 mVp-p,
Rx0 - Rx2 HDMI Data Pattern,
2.25 Gbps RxC, 225 MHz
10
0
0
75
165
185
205
f - Frequency - MHz
1
225
2
3
4
5
6
TA - Free- Air Temperature - °C
Figure 10.
Figure 11.
RESIDUAL PEAK-TO-PEAK JITTER
vs
DATA RATE
(DC Coupled Input: 5m 28AWG, Output: 1m 28AWG)
RESIDUAL PEAK-TO-PEAK JITTER
vs
DATA RATE
(DC Coupled Input: 3m 30AWG, Output: 1m 28AWG)
20
20
16
14
PRE = Low, 1200 mVPP
12
10
8
PRE = High, 800 mVPP
6
PRE = High, 1200 mVPP
4
2
VCC = AVCC = 3.3 V, RT = 50 W, RVSADJ = 4.64 kW,
TA = 25°C, OE = Low, HDMI Data Pattern
0
750
1450
1650
1850
2250
Residual Peak-peak Jitter - % of Tbit
18
PRE = Low, 800 mVPP
18
Residual Peak-peak Jitter - % of Tbit
OE = Low, PRE = High
90
16
PRE = Low, 1200 mVPP
14
12
PRE = Low, 800 mVPP
10
8
PRE = High, 1200 mVPP
6
PRE = High, 800 mVPP
4
2
0
VCC = AVCC = 3.3 V, RT = 50 W, RVSADJ = 4.64 kW,
TA = 25°C, OE = Low, HDMI Data Pattern
750
Data Rate - Mbps
1450
1650
1850
2250
Data Rate - Mbps
Figure 12.
Figure 13.
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TYPICAL CHARACTERISTICS (continued)
RESIDUAL PEAK-TO-PEAK JITTER
vs
DATA RATE
(AC Coupled Input: 3m 30AWG, Output: 1m 28AWG)
RESIDUAL PEAK-TO-PEAK JITTER
vs
8-MIL FR4 TRACE OUTPUT
(DC Coupled Input: 5m 28AWG)
20
15
16
PRE = Low, 800 mVPP
14
12
PRE = Low, 1200 mVPP
10
8
PRE = High, 1200 mVPP
6
4
PRE = High, 800 mVPP
14
Residual Peak-peak jitter - % of Tbit
Residual Peak-peak Jitter - % of Tbit
VCC = AVCC = 3.3 V, RT = 50 W, RVSADJ = 4.64 kW,
18 TA = 25°C, OE = Low, HDMI Data Pattern
10
2
1450
1650
1850
9
8
7
XTP1 VID = 800 mVPP
6
XTP1 VID = 1200 mVPP
5
4
3
2
1
0
0
750
VCC = AVCC = 3.3 V, RT = 50 W,
RVSADJ = 4.64 kW,TA = 25°C, PRE = High,
13 OE = Low, 1.65 Gbps HDMI Pattern,
12 165-Mhz Pixel Clock, VID(PP) at XTP1,
11 Source Jitter < 0.3 UI, See Figure 7
2250
5
Data Rate - Mbps
7
11
15
8-mil FR4 Trace Length - inch
Figure 14.
Figure 15.
RESIDUAL PEAK-TO-PEAK JITTER
vs
PEAK-TO-PEAK DIFFERENTIAL INPUT VOLTAGE
(at XTP2)
Residual Peak-peak Jitter - % of Tbit
8
7.5
7
6.5
VCC = AVCC = 3.3 V, RT = 50 W, RVSADJ = 4.64 kW,
TA = 25°C, OE = Low, 28AWG HDMI Cable,
1.65 Gbps HDMI Data Pattern, 165 Mhz Pixel Clock,
VID(PP) at XTP1, Source Jitter < 0.3 UI, See Figure 7
Output = 0m, PRE = Low
6
5.5
5
Output = 1m, PRE = High
4.5
4
300 500 700 900 1100 1300 1500 1700
Peak-to-Peak Differential Input Voltage - mVp-p
Figure 16.
14
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APPLICATION INFORMATION
Supply Voltage
All VCC pins can be tied to a single 3.3-V power source. A 0.01-µF capacitor is connected from each VCC pin
directly to ground to filter supply noise.
TMDS Inputs
Standard TMDS terminations are integrated on all TMDS inputs. External terminations are not required. Each
input channel contains an 8-dB equalization circuit to compensate for cable losses. The voltage at the TMDS
input pins must be limited per the absolute maximum ratings. An unused input should not be connected to
ground as this would result in excessive current flow damaging the device. TMDS input pins do not incorporate
failsafe circuits. An unused input channel can be externally biased to prevent output oscillation. The
complementary input pin is recommended to be grounded through a 1-kΩ resistor and the other pin left open.
TMDS Outputs
A 1% precision resister, 4.64-kΩ, connected from VSADJ to ground is recommended to allow the differential
output swing to comply with TMDS signal levels. The differential output driver provides a typical 10-mA current
sink capability, which provides a typical 500-mV voltage drop across a 50-Ω termination resistor.
AVCC
VCC
TMDS141
ZO = RT
TMDS
Driver
RT
RT
ZO = RT
TMDS
Receiver
GND
Figure 17. TMDS Driver and Termination Circuit
Referring to Figure 17, if both VCC (TMDS141 supply) and AVCC (sink termination supply) are both powered, the
TMDS output signals is high impedance when OEB = high. Both supplies being active is the normal operating
condition.
Again refer to Figure 17, if VCC is on and AVCC is off, the TMDS outputs source a typical 5-mA current through
each termination resistor to ground. A total of 10-mW of power is consumed by the terminations independent of
the OEB logical selection. When AVCC is powered on, normal operation (OEB controls output impedance) is
resumed.
When the power source of the device is off and the power source to termination is on, the IO(off), output leakage
current, specification ensures the leakage current is limited 10-µA or less.
The PRE pin provides 3dB de-emphasis, allowing output signal pre-conditioning to offset interconnect losses
from the TMDS141 outputs to a TMDS receiver. PRE is recommended to be set low while connecting to a
receiver throw short PCB route.
I2C Function Description
The RSCL/RSDA and TSCL/TSDA pins are 5-V tolerant when the device is powered off and high impedance
under low supply voltage, 1.5 V or below. If the device is powered up and the I2C circuits are enabled, and
I2CEN = high, the driver T (see Figure 18) is turned on or off depending up on the corresponding R side voltage
level.
When the R side is pulled low below 1.5 V, the corresponding T side driver turns on and pulls the T side down to
a low level output voltage, VOL. The value of VOL depends on the input to the OVS pin. When OVS is left floating
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APPLICATION INFORMATION (continued)
or not connected, VOL is typically 0.5 V. When OVS is connected to GND, VOL is typically 0.65 V. When OVS is
connected to VCC, VOL is typically 0.8 V. VOL is always higher than the driver R input threshold, VIL, which is
typically 0.4 V, preventing lockup of the repeater loop. The VOL value can be selected to improve or optimize
noise margins between VOL and the VIL of the repeater itself or the VIL of some external device connected on the
T side.
When the R side is pulled up, above 1.5 V, the T side driver turns off and the T side pin is high impedance.
OVS
T
RSCL
RSDA
TSCL
TSDA
I2CEN
R
Figure 18. I2C Drivers in TMDS141
When the T side is pulled below 0.4 V by an external I2C driver, both drivers R and T are turned on. Driver R
pulls the R side to near 0 V, and driver T is on, but is overridden by the external I2C driver. If driver T is already
on, due to a low on the R side, driver R just turns on.
When the T side is released by the external I2C driver, driver T is still on, so the T side is only able to rise to the
VOL of driver T. Driver R turns off, since VOL is above its 0.4-V VIL threshold, releasing the R side. If no external
I2C driver is keeping the R side low, the R side rises, and driver T turns off once the R side rises above 1.5 V,
see Figure 19.
Vcc
TSCL/TSDA
0.5V
tPLH
5V +
10%
RSCL/RSDA
Vcc/2
Figure 19. Waveform of Turning Driver T Off
It is important that any external I2C driver on the T side is able to pull the bus below 0.4 V to ensure full
operation. If the T side cannot be pulled below 0.4 V, driver R may not recognize and transmit the low value to
the R side.
I2C Enable
The I2CEN pin is active high with an internal pull-up to VCC. It can be used to isolate a badly behaved slave
during power up. It should never change state during an I2C operation because disabling during a bus operation
may hang the bus and enabling part way through a bus cycle could confuse the I2C parts being enabled.
I2C Behavior
The typical application of the TMDS141 is as a repeater in a TV connecting the HDMI input connector and an
internal HDMI Rx through flat cables. The I2C repeater is 5-V tolerant, and no additional circuitry is required to
translate between 3.3-V to 5-V bus voltages. In the following example, the system master is running on an
R-side I2C-bus while the slave is connected to a T-side bus. Both buses run at 100 kHz supporting
standard-mode I2C operation. Master devices can be placed on either bus.
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APPLICATION INFORMATION (continued)
VRdd
V Tdd
Driver T
RRup
RTup
Master
Slave
CSOURCE
CI
CO
Cslave
Driver R
Cmedium
CCABLE
Figure 20. Typical Application
Figure 21 illustrates the waveforms seen on the R-side I2C-bus when the master writes to the slave through the
I2C repeater circuit of the TMDS141. This looks like a normal I2C transmission, and the turn on and turn off of
the acknowledge signals are slightly delayed.
9th Clock Pulse - Acknowledge From Slave
RSCL
RSDA
Figure 21. Bus R Waveform
Figure 22 illustrates the waveforms seen on the T-side I2C-bus under the same operation in Figure 21. On the
T-side of the I2C repeater, the clock and data lines would have a positive offset from ground equal to the VOL of
the driver T. After the 8th clock pulse, the data line is pulled to the VOL of the slave device which is very close to
ground in this example. At the end of the acknowledge, the slave device releases and the bus level rises back to
the VOL set by the driver until the R-side rises above VCC/2, after which it continues to high. It is important to
note that any arbitration or clock stretching events require that the low level on the T-side bus at the input of the
TMDS141 I2C repeater is below 0.4 V to be recognized by the device and then transmitted to the R-side I2C bus.
9th Clock Pulse - Acknowledge From Slave
TSCL
TSDA
VOL Of Driver T
V OL Of Slave
Figure 22. Bus T Waveform
The I2C circuitry inside the TMDS141 allows multiple stage operation as shown in Figure 23. I2C-Bus slave
devices can be connected to any of the bus segments. The number of devices that can be connected in series is
limited by repeater delay/time of flight considerations for the maximum bus speed requirements.
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APPLICATION INFORMATION (continued)
Source
Sink
Repeater
3.3V
5V
5V
5V
Rup
5V
3.3V
Rup SOURCE
SOURCE
Rup 1
3.3V
Rup
Rup 2
Rup SINK
SINK
SDA
RSDA
TSDA
RSDA
TSDA
RSDA
TSDA
SDA
SCL
RSCL
TSCL
RSCL
TSCL
RSCL
TSCL
SCL
BUS
MASTER
C1
TMDS141
C2
C3
C2
C2
C2
C3
TMDS141
EN
EN
TMDS141
C1
BUS
SLAVE
EN
Figure 23. Typical Series Application
I2C Pull-up Resistors
The pull-up resistor value is determined by two requirements:
1. The maximum sink current of the I2C buffer:
The maximum sink current is 3 mA or slightly higher for an I2C driver supporting standard-mode I2C
operation.
R up(min) + VDDńlsink
(1)
2. The maximum transition time on the bus:
The maximum transition time, T, of an I2C bus is set by an RC time constant, where R is the pull-up resistor
value, and C is the total load capacitance. The parameter, k, can be calculated from equation 3 by solving for
t, the times at which certain voltage thresholds are reached. Different input threshold combinations introduce
different values of t. Table 1 summarizes the possible values of k under different threshold combinations.
T + k RC
(2)
V(t) + V
(1 * e *tńRC)
DD
(3)
Table 1. Value k Upon Different Input Threshold Voltages
Vth-\Vth+
0.7VDD
0.65VDD
0.6VDD
0.55VDD
0.5VDD
0.45VDD
0.4VDD
0.35VDD
0.3VDD
0.1VDD
1.0986
0.9445
0.8109
0.6931
0.5878
0.4925
0.4055
0.3254
0.2513
0.15VDD
1.0415
0.8873
0.7538
0.6360
0.5306
0.4353
0.3483
0.2683
0.1942
0.2VDD
0.9808
0.8267
0.6931
0.5754
0.4700
0.3747
0.2877
0.2076
0.1335
0.25VDD
0.9163
0.7621
0.6286
0.5108
0.4055
0.3102
0.2231
0.1431
0.0690
0.3VDD
0.8473
0.6931
0.5596
0.4418
0.3365
0.2412
0.1542
0.0741
-
From equation 1, Rup(min) = 5.5V/3mA = 1.83 kΩ to operate the bus under a 5-V pull-up voltage and provide less
than 3 mA when the I2C device is driving the bus to a low state. If a higher sink current, for example 4 mA, is
allowed, Rup(min) can be as low as 1.375 kΩ.
Given a 5-V I2C device with input low and high threshold voltages at 0.3 Vdd and 0.7 Vdd, the valued of k is
0.8473 from Table 1. Taking into account the 1.83-kΩ pull-up resistor, the maximum total load capacitance is
C(total-5V) = 645 pF. Ccable(max) should be restricted to be less than 545 pF if Csource and Ci can be as heavy as 50
pF. Here the Ci is treated as Csink, the load capacitance of a sink device.
Fixing the maximum transition time from Table 1, T = 1 µs, and using the k values from Table 1, the
recommended maximum total resistance of the pull-up resistors on an I2C bus can be calculated for different
system setups.
To support the maximum load capacitance specified in the HDMI spec, Ccable(max) = 700pF/Csource = 50pF/Ci =
50pF, R(max) can be calculated as shown in Table 2.
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Table 2. Pull-Up Resistor Upon Different Threshold Voltages and 800-pF Loads
Vth-\Vth+
0.7VDD
0.65VDD
0.6VDD
0.55VDD
0.5VDD
0.45VDD
0.4VDD
0.35VDD
0.3VDD
UNIT
0.1VDD
1.14
1.32
1.54
1.80
2.13
2.54
3.08
3.84
4.97
kΩ
0.15VDD
1.20
1.41
1.66
1.97
2.36
2.87
3.59
4.66
6.44
kΩ
0.2VDD
1.27
1.51
1.80
2.17
2.66
3.34
4.35
6.02
9.36
kΩ
0.25VDD
1.36
1.64
1.99
2.45
3.08
4.03
5.60
8.74
18.12
kΩ
0.3VDD
1.48
1.80
2.23
2.83
3.72
5.18
8.11
16.87
-
kΩ
Or, limiting the maximum load capacitance of each cable to be 400 pF to accommodate with I2C spec version
2.1. Ccable(max) = 400pF/Csource=50pF/Ci = 50pF, the maximum values of R(max) are calculated as shown in
Table 3.
Table 3. Pull-Up Resistor Upon Different Threshold Voltages and 500-pF Loads
Vth-\Vth+
0.7VDD
0.65VDD
0.6VDD
0.55VDD
0.5VDD
0.45VDD
0.4VDD
0.35VDD
0.3VDD
UNIT
0.1VDD
1.82
2.12
2.47
2.89
3.40
4.06
4.93
6.15
7.96
kΩ
0.15VDD
1.92
2.25
2.65
3.14
3.77
4.59
5.74
7.46
10.30
kΩ
0.2VDD
2.04
2.42
2.89
3.48
4.26
5.34
6.95
9.63
14.98
kΩ
0.25VDD
2.18
2.62
3.18
3.92
4.93
6.45
8.96
13.98
28.99
kΩ
0.3VDD
2.36
2.89
3.57
4.53
5.94
8.29
12.97
26.99
-
kΩ
Obviously, to accommodate the 3-mA drive current specification, a narrower threshold voltage range is required
to support a maximum 800-pF load capacitance for a standard-mode I2C bus.
When the input low and high level threshold voltages, Vth- and Vth+, are 0.7 V and 1.9 V, which is 0.15 VDD and
0.4 VDD approximately with VDD = 5 V, from Table 2, the maximum pull-up resistor is 3.59 kΩ. The allowable
pull-up resistor is in the range of 1.83 kΩ and 3.59 kΩ.
Thermal Dissipation
On a high-K board – It is always recommended to solder the PowerPAD onto the thermal land. A thermal land is
the area of solder-tinned-copper underneath the PowerPAD package. On a high-K board the TMDS141 can
operate over the full temperature range by soldering the PowerPAD onto the thermal land without vias.
On a low-K board – In order for the device to operate across the temperature range on a low-K board, a 1-oz Cu
trace connecting the GND pins to the thermal land must be used. A simulation shows RθJA = 100.84°C/W
allowing 545 mW power dissipation at 70°C ambient temperature.
A general PCB design guide for PowerPAD packages is provided in the document SLMA002 - PowerPAD
Thermally Enhanced Package.
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PACKAGE OPTION ADDENDUM
PACKAGING INFORMATION 11-August-2006
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins
Package
Qty
Eco Plan (2)
Lead/Ball Finish
MSL Peak Temp (3)
TMDS141RHAR
ACTIVE
QFN
RHA
40
2500
Green (RoHS &
no Sb/ Br)
CU NIPDAU
Level-3-260C-168 HR
TMDS141RHARG4
ACTIVE
QFN
RHA
40
2500
Green (RoHS &
no Sb/ Br)
CU NIPDAU
Level-3-260C-168 HR
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 information may not be available for release.
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.
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Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from A Revision (August 2006) to B Revision ............................................................................................... Page
•
•
•
•
•
•
•
•
•
•
•
•
•
Changed Features ................................................................................................................................................................ 1
Changed Signaling rate from 1.65 Gbps to 2.25 Gbps ........................................................................................................ 5
Added PRE = Low to supply current test conditions ............................................................................................................ 6
Added PRE = Low to power dissipation test conditions ....................................................................................................... 6
Deleted TTL high- and low-level output voltages ................................................................................................................. 7
Changed Peak-to-peak output jitter from TX0 - TX2, residual jitter from 90 to 88 ps .......................................................... 7
Added Peak-to-peak output jitter from TXC, residual jitter ................................................................................................... 7
Added Peak-to-peak output jitter from TX0 - TX2, residual jitter.......................................................................................... 7
Changed Figure 10 ............................................................................................................................................................ 13
Changed Figure 11 ............................................................................................................................................................ 13
Changed Figure 12 ............................................................................................................................................................ 13
Changed Figure 13 ............................................................................................................................................................ 13
Changed Figure 14 ............................................................................................................................................................ 14
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PACKAGE OPTION ADDENDUM
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14-Apr-2007
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
TMDS141RHAR
ACTIVE
QFN
RHA
40
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
TMDS141RHARG4
ACTIVE
QFN
RHA
40
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
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
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Addendum-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
17-May-2007
TAPE AND REEL INFORMATION
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
Device
TMDS141RHAR
17-May-2007
Package Pins
RHA
40
Site
Reel
Diameter
(mm)
Reel
Width
(mm)
A0 (mm)
B0 (mm)
K0 (mm)
P1
(mm)
MLA
330
16
6.3
6.3
1.5
12
TAPE AND REEL BOX INFORMATION
Device
Package
Pins
Site
Length (mm)
Width (mm)
Height (mm)
TMDS141RHAR
RHA
40
MLA
346.0
346.0
33.0
Pack Materials-Page 2
W
Pin1
(mm) Quadrant
16
PKGORN
T2TR-MS
P
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