www.ti.com
TRSF3221
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
FEATURES
SLLS857 – AUGUST 2007
1
•
•
•
•
•
•
•
Operates With 3-V to 5.5-V VCC Supply
Operates up to 1 Mbit/s
Low Standby Current . . . 1 μA Typ
External Capacitors . . . 4 × 0.1 μF
Accepts 5-V Logic Input With 3.3-V Supply
RS-232 Bus-Pin ESD Protection Exceeds
±15 kV Using Human-Body Model (HBM)
Auto-Powerdown Feature Automatically
Disables Drivers for Power Savings
DB OR PW PACKAGE
(TOP VIEW)
EN
C1+
V+
C1−
C2+
C2−
V−
RIN
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
FORCEOFF
VCC
GND
DOUT
FORCEON
DIN
INVALID
ROUT
APPLICATIONS
•
•
•
•
•
Battery-Powered, Hand-Held, and Portable
Equipment
PDAs and Palmtop PCs
Notebooks, Sub-Notebooks, and Laptops
Digital Cameras
Mobile Phones and Wireless Devices
DESCRIPTION/ORDERING INFORMATION
The TRSF3221 consists of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV IEC
ESD protection pin-to-pin (serial-port connection pins, including GND). The TRSF3221 provides the electrical
interface between an asynchronous communication controller and the serial-port connector. The charge pump
and four small external capacitors allow operation from a single 3-V to 5.5-V supply. The TRSF3221 operates at
data signaling rates up to 1 Mbit/s and a driver output slew rate of 24 V/μs to 150 V/μs.
Flexible control options for power management are available when the serial port is inactive. The
auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of
operation, if the TRSF3221 does not sense a valid RS-232 signal on the receiver input, the driver output is
disabled. If FORCEOFF is set low and the enable (EN) input is high, both the driver and receiver are shut off,
and the supply current is reduced to 1 μA. Disconnecting the serial port or turning off the peripheral drivers
causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and
FORCEOFF are high. With auto-powerdown enabled, the device is activated automatically when a valid signal is
applied to the receiver input. The INVALID output notifies the user if an RS-232 signal is present at the receiver
input. INVALID is high (valid data) if the receiver input voltage is greater than 2.7 V or less than –2.7 V, or has
been between –0.3 V and 0.3 V for less than 30 μs. INVALID is low (invalid data) if the receiver input voltage is
between –0.3 V and 0.3 V for more than 30 μs. See Figure 5 for receiver input levels.
1
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 © 2007, Texas Instruments Incorporated
TRSF3221
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
www.ti.com
SLLS857 – AUGUST 2007
ORDERING INFORMATION
TA
PACKAGE
SSOP – DB
0°C to 70°C
TSSOP – PW
SSOP – DB
–40°C to 85°C
(1)
(2)
TSSOP – PW
(1) (2)
ORDERABLE PART NUMBER
Reel of 2000
TRSF3221CDBR
Tube of 90
TRSF3221CPW
Reel of 2000
TRSF3221CPWR
Reel of 2000
TRSF3221IDBR
Tube of 90
TRSF3221IPW
Reel of 2000
TRSF3221IPWR
TOP-SIDE MARKING
RT21C
RT21C
RT21I
RT21I
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
FUNCTION TABLES
abc
Each Driver (1)
INPUTS
DIN
(1)
FORCEON
FORCEOFF
VALID RIN
RS-232 LEVEL
OUTPUT
DOUT
DRIVER STATUS
X
X
L
X
Z
Powered off
L
H
H
X
H
H
H
H
X
L
Normal operation with
auto-powerdown disabled
L
L
H
Yes
H
H
L
H
Yes
L
L
L
H
No
Z
H
L
H
No
Z
Normal operation with
auto-powerdown enabled
Powered off by
auto-powerdown feature
H = high level, L = low level, X = irrelevant, Z = high impedance
abc
Each Receiver (1)
INPUTS
(1)
RIN
EN
VALID RIN
RS-232 LEVEL
OUTPUT
ROUT
L
L
X
H
H
L
X
L
X
H
X
Z
Open
L
No
H
H = high level, L = low level, X = irrelevant, Z = high impedance (off),
Open = disconnected input or connected driver off
LOGIC DIAGRAM (POSITIVE LOGIC)
DIN
FORCEOFF
FORCEON
ROUT
11
13
16
12
Auto-Powerdown
9
10
8
1
2
DOUT
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INVALID
RIN
EN
Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TRSF3221
TRSF3221
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
www.ti.com
SLLS857 – AUGUST 2007
Absolute Maximum Ratings (1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
VCC
Supply voltage range (2)
–0.3
6
V
V+
Positive-output supply voltage range (2)
–0.3
7
V
0.3
–7
V
13
V
V–
Negative-output supply voltage range
(2)
V+ – V– Supply voltage difference (2)
VI
Input voltage range
VO
Output voltage range
θJA
Package thermal impedance (3) (4)
TJ
Operating virtual junction temperature
Tstg
Storage temperature range
(1)
(2)
(3)
(4)
Driver (FORCEOFF, FORCEON, EN)
–0.3
6
Receiver
–25
25
Driver
–13.2
13.2
–0.3
VCC + 0.3
Receiver (INVALID)
DB package
82
PW package
108
–65
UNIT
V
V
°C/W
150
°C
150
°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltages are with respect to network GND.
Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
The package thermal impedance is calculated in accordance with JESD 51-7.
Recommended Operating Conditions (1)
See Figure 6
Supply voltage
VCC = 5 V
VIH
Driver and control
high-level input voltage
DIN, FORCEOFF, FORCEON, EN
VIL
Driver and control
low-level input voltage
DIN, FORCEOFF, FORCEON, EN
VI
Driver and control input voltage
DIN, FORCEOFF, FORCEON
VI
Receiver input voltage
TA
Operating free-air temperature
(1)
MIN
NOM
MAX
3
3.3
3.6
4.5
5
5.5
VCC = 3.3 V
VCC = 3.3 V
VCC = 5 V
TRSF3221I
UNIT
V
2
V
2.4
0.8
V
0
5.5
V
–25
25
V
–40
85
0
70
TRSF3221C
°C
Test conditions are C1–C4 = 0.1 μF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 μF, C2–C4 = 0.33 μF at VCC = 5 V ± 0.5 V.
Electrical Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
II
ICC
(1)
(2)
Input leakage current
Supply current
(TA = 25°C)
TEST CONDITIONS
MIN
FORCEOFF, FORCEON, EN
TYP (2)
MAX
±0.01
±1
μA
0.3
1
mA
Auto-powerdown disabled
No load,
FORCEOFF and FORCEON at VCC
Powered off
No load, FORCEOFF at GND
1
10
Auto-powerdown enabled
No load, FORCEOFF at VCC,
FORCEON at GND,
All RIN are open or grounded
1
10
UNIT
μA
Test conditions are C1–C4 = 0.1 μF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 μF, C2–C4 = 0.33 μF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
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TRSF3221
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
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SLLS857 – AUGUST 2007
DRIVER SECTION
abc
Electrical Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
TEST CONDITIONS
MIN
TYP (2) MAX
VOH
High-level output voltage
DOUT at RL = 3 kΩ to GND,
DIN = GND
5
5.4
VOL
Low-level output voltage
DOUT at RL = 3 kΩ to GND,
DIN = VCC
–5
–5.4
IIH
High-level input current
VI = VCC
IIL
Low-level input current
VI at GND
IOS
Short-circuit
output current (3)
VO = 0 V
ro
Output resistance
VCC, V+, and V– = 0 V,
Ioff
Output leakage current
FORCEOFF = GND
(1)
(2)
(3)
±0.01
V
V
±1
μA
μA
±0.01
±1
VCC = 3.6 V
±35
±60
VCC = 5.5 V
±35
±90
VO = ±2 V
300
UNIT
mA
Ω
10M
VO = ±12 V,
VCC = 3 V to 3.6 V
±25
VO = ±10 V,
VCC = 4.5 V to 5.5 V
±25
μA
Test conditions are C1–C4 = 0.1 μF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 μF, C2–C4 = 0.33 μF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
Short-circuit durations should be controlled to prevent exceeding the device absolute power dissipation ratings, and not more than one
output should be shorted at a time.
Switching Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
Maximum data rate
(see Figure 1)
RL = 3 kΩ
TEST CONDITIONS
MIN
CL = 1000 pF
250
CL = 250 pF,
VCC = 3 V to 4.5 V
1000
CL = 1000 pF,
VCC = 4.5 V to 5.5 V
1000
tsk(p)
Pulse skew (3)
CL = 150 pF to 2500 pF,
RL = 3 kΩ to 7 kΩ,
See Figure 2
SR(tr)
Slew rate,
transition region
(see Figure 1)
VCC = 3.3 V,
RL = 3 kΩ to 7 kΩ,
CL = 150 pF to 1000 pF
(1)
(2)
(3)
TYP (2)
MAX
kbit/s
100
18
UNIT
ns
150
V/μs
Test conditions are C1–C4 = 0.1 μF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 μF, C2–C4 = 0.33 μF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
Pulse skew is defined as |tPLH – tPHL| of each channel of the same device.
ESD Protection
TERMINAL
4
NAME
NO.
DOUT
13
TEST CONDITIONS
HBM
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TYP
UNIT
±15
kV
Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TRSF3221
TRSF3221
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
www.ti.com
SLLS857 – AUGUST 2007
RECEIVER SECTION
abc
Electrical Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
MIN
TYP (2)
VCC – 0.6
VCC – 0.1
TEST CONDITIONS
VOH
High-level output voltage
IOH = –1 mA
VOL
Low-level output voltage
IOL = 1.6 mA
MAX
V
0.4
VCC = 3.3 V
1.6
2.4
VCC = 5 V
1.9
2.4
VIT+
Positive-going input threshold voltage
VIT–
Negative-going input threshold voltage
Vhys
Input hysteresis (VIT+ – VIT–)
Ioff
Output leakage current
FORCEOFF = 0 V
ri
Input resistance
VI = ±3 V to ±25 V
UNIT
VCC = 3.3 V
0.6
1.1
VCC = 5 V
0.8
1.4
V
V
V
0.5
3
V
±0.05
±10
μA
5
7
kΩ
Test conditions are C1–C4 = 0.1 μF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 μF, C2–C4 = 0.33 μF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
(1)
(2)
Switching Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
TEST CONDITIONS
TYP (2)
UNIT
tPLH
Propagation delay time, low- to high-level output
CL = 150 pF, See Figure 3
150
ns
tPHL
Propagation delay time, high- to low-level output
CL = 150 pF, See Figure 3
150
ns
ten
Output enable time
CL = 150 pF, RL = 3 kΩ, See Figure 4
200
ns
tdis
Output disable time
CL = 150 pF, RL = 3 kΩ, See Figure 4
200
ns
tsk(p)
Pulse skew (3)
See Figure 3
50
ns
(1)
(2)
(3)
Test conditions are C1–C4 = 0.1 μF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 μF, C2–C4 = 0.33 μF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
Pulse skew is defined as |tPLH – tPHL| of each channel of the same device.
ESD Protection
TERMINAL
NAME
NO.
RIN
8
TEST CONDITIONS
HBM
TYP
UNIT
±15
kV
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TRSF3221
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
www.ti.com
SLLS857 – AUGUST 2007
AUTO-POWERDOWN SECTION
abc
Electrical Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
TEST CONDITIONS
MIN
VT+(valid)
Receiver input threshold
for INVALID high-level output voltage
FORCEON = GND,
FORCEOFF = VCC
VT–(valid)
Receiver input threshold
for INVALID high-level output voltage
FORCEON = GND,
FORCEOFF = VCC
–2.7
VT(invalid)
Receiver input threshold
for INVALID low-level output voltage
FORCEON = GND,
FORCEOFF = VCC
–0.3
VOH
INVALID high-level output voltage
IOH = –1 mA, FORCEON = GND,
FORCEOFF = VCC
VOL
INVALID low-level output voltage
IOL = 1.6 mA, FORCEON = GND,
FORCEOFF = VCC
MAX
UNIT
2.7
V
V
0.3
V
VCC – 0.6
V
0.4
V
Switching Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
tvalid
Propagation delay time, low- to high-level output
tinvalid
Propagation delay time, high- to low-level output
ten
Supply enable time
(1)
6
TYP (1)
UNIT
1
μs
30
μs
100
μs
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
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TRSF3221
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
www.ti.com
SLLS857 – AUGUST 2007
PARAMETER MEASUREMENT INFORMATION
3V
Generator
(see Note B)
Input
RS-232
Output
50 Ω
RL
tTHL
CL
(see Note A)
3V
FORCEOFF
TEST CIRCUIT
0V
tTLH
3V
3V
Output
−3 V
−3 V
6V
SR(tr) +
t THL or tTLH
VOH
VOL
VOLTAGE WAVEFORMS
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
Figure 1. Driver Slew Rate
3V
Generator
(see Note B)
RS-232
Output
50 Ω
RL
Input
1.5 V
1.5 V
0V
CL
(see Note A)
tPHL
tPLH
VOH
3V
FORCEOFF
50%
50%
Output
VOL
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
Figure 2. Driver Pulse Skew
3 V or 0 V
FORCEON
3V
Input
1.5 V
1.5 V
−3 V
Output
Generator
(see Note B)
tPHL
50 Ω
3V
FORCEOFF
tPLH
CL
(see Note A)
VOH
50%
Output
50%
VOL
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
Figure 3. Receiver Propagation Delay Times
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3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
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SLLS857 – AUGUST 2007
PARAMETER MEASUREMENT INFORMATION (continued)
3V
Input
VCC
3 V or 0 V
FORCEON
3 V or 0 V
1.5 V
1.5 V
GND
S1
0V
tPZH
(S1 at GND)
tPHZ
(S1 at GND)
RL
VOH
Output
50%
Output
CL
(see Note A)
EN
Generator
(see Note B)
50 Ω
0.3 V
tPLZ
(S1 at VCC)
tPZL
(S1 at VCC)
0.3 V
Output
50%
VOL
TEST CIRCUIT
NOTES: A.
B.
C.
D.
VOLTAGE WAVEFORMS
CL includes probe and jig capacitance.
The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
tPLZ and tPHZ are the same as tdis.
tPZL and tPZH are the same as ten.
Figure 4. Receiver Enable and Disable Times
8
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TRSF3221
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
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SLLS857 – AUGUST 2007
PARAMETER MEASUREMENT INFORMATION (continued)
2.7 V
2.7 V
0V
Receiver
Input
0V
ROUT
Generator
(see Note B)
3V
−2.7 V
−2.7 V
50 Ω
−3 V
tvalid
tinvalid
VCC
Autopowerdown
INVALID
INVALID
Output
CL = 30 pF
(see Note A)
FORCEOFF
FORCEON
DIN
DOUT
50% VCC
50% VCC
0V
ten
V+
≈V+
Supply
Voltages
0.3 V
VCC
0V
0.3 V
V−
≈V−
TEST CIRCUIT
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
VOLTAGE WAVEFORMS
Valid RS-232 Level, INVALID High
2.7 V
Indeterminate
0.3 V
0V
If Signal Remains Within This Region
For More Than 30 µs, INVALID Is Low†
−0.3 V
Indeterminate
−2.7 V
Valid RS-232 Level, INVALID High
†
Auto-powerdown disables drivers and reduces supply
current to 1 µA.
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 5 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
Figure 5. INVALID Propagation Delay Times and Driver Enabling Time
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TRSF3221
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
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SLLS857 – AUGUST 2007
APPLICATION INFORMATION
EN
16
1
2
VCC
C1+
15
+
3
C1
+
+
−
−
V+
AutoPowerdown
C3(1)
4
GND
−
14
13
12
C2
6
C2−
7
RIN
11
V−
10
C4
+
DOUT
C2+
+
−
CBYPASS = 0.1 µF
C1−
5
−
FORCEOFF
8
9
FORCEON
DIN
INVALID
ROUT
5 kΩ
(1) C3 can be connected to VCC or GND.
NOTES: A. Resistor values shown are nominal.
VCC vs CAPACITOR VALUES
VCC
C1
C2, C3, and C4
3.3 V ± 0.3 V
5 V ± 0.5 V
3 V to 5.5 V
0.1 µF
0.047 µF
0.1 µF
0.1 µF
0.33 µF
0.47 µF
Figure 6. Typical Operating Circuit and Capacitor Values
10
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Product Folder Link(s): TRSF3221
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
TRSF3221CDBR
ACTIVE
SSOP
DB
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
RT21C
(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