TRS3232
SLLS812B – JULY 2007 – REVISED JUNE 2021
TRS3232 3-V to 5.5-V Multichannel RS-232 Line Driver and Receiver
With ±15-kV ESD Protection
1 Features
3 Description
•
The TRS3232 consists of two line drivers, two
line receivers, and a dual charge-pump circuit with
±15-kV ESD protection terminal-to-terminal (serialport connection terminals, including GND). The
device meets the requirements of TIA/EIA-232-F
and 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 one
3-V to 5.5-V supply. The devices operate at datasignaling rates up to 250 kbps and a maximum of
30-V/μs driver-output slew rate.
•
•
•
•
•
•
•
•
RS-232 Bus-terminal ESD protection exceeds
±15 kV using human-body model (HBM)
Meets or exceeds the requirements of
TIA/EIA-232-F and ITU V.28 standards
Operates with 3-V to 5.5-V VCC supply
Operates up to 250 kbps
Two drivers and two receivers
Low supply current: 300-μA typical
External capacitors: 4 × 0.1 μF
Accepts 5-V logic input with 3.3-V supply
Alternative high-speed terminal-compatible
devices s (1 Mbps)
– SN65C3232 (–40°C to 85°C)
– SN75C3232 (0°C to 70°C)
Device Information
PART NUMBER
2 Applications
•
•
•
•
•
•
•
•
Industrial PCs
Wired networking
Data cneter and enterprise computing
Battery-powered systems
Notebooks
Laptops
Palmtop PCs
Hand-held equipment
TRS3232
(1)
3.3 V, 5 V
BODY SIZE (NOM)
SOIC (16)
9.90 mm × 3.91 mm
SSOP (16)
6.20 mm × 5.30 mm
SOIC-Wide (16)
10.30 mm × 7.50 mm
TSSOP (16)
5.00 mm × 4.40 mm
For all available packages, see the orderable addendum at
the end of the data sheet.
POWER
2
DIN
2
TX
DOUT
RS232
2
ROUT
PACKAGE(1)
RX
2
RIN
RS232
Simplified Schematic
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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Table of Contents
1 Features............................................................................1
2 Applications..................................................................... 1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Pin Configuration and Functions...................................3
6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings........................................ 4
6.2 ESD Ratings............................................................... 4
6.3 Recommended Operating Conditions.........................4
6.4 Thermal Information....................................................5
6.5 Electrical Characteristics—Device.............................. 5
6.6 Electrical Characteristics—Driver............................... 5
6.7 Electrical Characteristics—Receiver...........................6
6.8 Switching Characteristics............................................6
6.9 Typical Characteristics................................................ 6
7 Parameter Measurement Information............................ 7
8 Detailed Description........................................................8
8.1 Overview..................................................................... 8
8.2 Functional Block Diagram........................................... 8
8.3 Feature Description.....................................................8
8.4 Device Functional Modes............................................9
9 Application and Implementation.................................. 10
9.1 Application Information............................................. 10
9.2 Typical Application.................................................... 10
10 Power Supply Recommendations..............................11
11 Layout........................................................................... 12
11.1 Layout Guidelines................................................... 12
11.2 Layout Example...................................................... 12
12 Device and Documentation Support..........................13
12.1 Receiving Notification of Documentation Updates..13
12.2 Support Resources................................................. 13
12.3 Trademarks............................................................. 13
12.4 Electrostatic Discharge Caution..............................13
12.5 Glossary..................................................................13
13 Mechanical, Packaging, and Orderable
Information.................................................................... 13
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (July 2015) to Revision B (June 2021)
Page
• Added Applications: Industrial PCs, Wired networking, and Data center and enterprise computing..................1
• Added additional thermal parameters for all packages in Thermal Information table.........................................5
Changes from Revision * (July 2007) to Revision A (June 2015)
Page
• Changed Pin Functions table, ESD Ratings table, Thermal Information table, Typical Characteristics section,
Detailed Description section, Power Supply Recommendations and Layout sections, Device and
Documentation Support and Mechanical, Packaging, and Orderable Information ............................................ 1
• Deleted Ordering Information table.....................................................................................................................3
2
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5 Pin Configuration and Functions
C1+
1
16
VCC
V+
2
15
GND
C1–
3
14
DOUT1
C2+
4
13
RIN1
C2–
5
12
ROUT1
V–
6
11
DIN1
DOUT2
7
10
DIN2
RIN2
8
9
ROUT2
Not to scale
Figure 5-1. D, DB, DW, PW Packages 16-Pin SOIC, SSOP, SOIC (Wide), TSSOP Top View
Table 5-1. Pin Functions
PIN
NAME
NO.
TYPE
DESCRIPTION
C1+
1
—
Positive lead of C1 capacitor
C1–
3
—
Negative lead of C1 capacitor
C2+
4
—
Positive lead of C2 capacitor
C2–
5
—
Negative lead of C2 capacitor
DIN1
11
I
Logic data input (from UART)
DIN2
10
I
Logic data input (from UART)
DOUT1
14
O
RS232 line data output (to remote RS232 system)
DOUT2
7
O
RS232 line data output (to remote RS232 system)
GND
15
—
Ground
RIN1
13
I
RS232 line data input (from remote RS232 system)
RIN2
8
I
RS232 line data input (from remote RS232 system)
ROUT1
12
O
Logic data output (to UART)
ROUT2
9
O
Logic data output (to UART)
V+
2
O
Positive charge pump output for storage capacitor only
V–
6
O
Negative charge pump output for storage capacitor only
VCC
16
—
Supply Voltage, Connect to external 3-V to 5.5-V power supply
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6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
Supply voltage(2)
VCC
voltage(2)
V+
Positive output supply
V–
Negative output supply voltage(2)
V+ – V–
Supply voltage
Input voltage
VO
Output voltage
TJ
Operating virtual junction temperature
Tstg
Storage temperature
(2)
MAX
UNIT
6
V
–0.3
7
V
–7
0.3
V
13
V
difference(2)
VI
(1)
MIN
–0.3
Drivers
–0.3
6
Receivers
–25
25
Drivers
–13.2
13.2
Receivers
–0.3
VCC + 0.3
–65
V
V
150
°C
150
°C
Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply
functional operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions.
If used outside the Recommended Operating Conditions but within the Absolute Maximum Ratings, the device may not be fully
functional, and this may affect device reliability, functionality, performance, and shorten the device lifetime.
All voltages are with respect to network GND.
6.2 ESD Ratings
VALUE
V(ESD)
(1)
(2)
Electrostatic discharge
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001
RIN , DOUT, and GND pins (1)
±15000
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001
All other pins(1)
±3000
Charged device model (CDM), per JEDEC specification JESD22-C101,
all pins(2)
±1000
UNIT
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
6.3 Recommended Operating Conditions
(see Figure 9-1)(1)
MIN
NOM
MAX
3
3.3
3.6
4.5
5
5.5
UNIT
VCC
Supply voltage
VIH
Driver high-level input voltage
DIN
VIL
Driver low-level input voltage
DIN
Driver input voltage
DIN
0
5.5
Receiver input voltage
RIN
–25
25
0
70
°C
–40
85
°C
VI
TA
(1)
4
VCC = 3.3 V
Operating free-air temperature
VCC = 5 V
VCC = 3.3 V
VCC = 5 V
TRS3232C
TRS3232I
2
V
V
2.4
0.8
V
V
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.
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6.4 Thermal Information
TRS3232
D
(SOIC)
DB
(SSOP)
DW
(SOIC-wide)
PW
(TSSOP)
16 PINS
16 PINS
16 PINS
16 PINS
73
82
57
108
°C/W
RθJC(top) Junction-to-case (bottom) thermal resistance
38.5
45.8
32.4
39
°C/W
RθJB
Junction-to-board thermal resistance
36.3
44.6
31.9
54.4
°C/W
ψ JT
Junction-to-top characterization parameter
8.0
11.1
8.4
3.3
ψ JB
Junction-to-board characterization parameter
36.0
44
31.5
53.8
R θJC(bot) Junction-to-case (bottom) thermal resistance
N/A
N/A
N/A
N/A
THERMAL METRIC(1)
RθJA
(1)
Junction-to-ambient thermal resistance
UNIT
°C/W
°C/W
°C/W
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report (SPRA953).
6.5 Electrical Characteristics—Device
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)(2) (see Figure 9-1)
PARAMETER
ICC
(1)
(2)
TEST CONDITIONS
Supply current
No load,
MIN
VCC = 3.3 V to 5 V
TYP(1)
MAX
0.3
1
UNIT
mA
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°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.
6.6 Electrical Characteristics—Driver
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)(1) (see Figure 9-1)
PARAMETER
TEST CONDITIONS
MIN
TYP(2)
MAX
UNIT
VOH
High-level output voltage
DOUT at RL = 3 kΩ to GND,
DIN = GND
5
5.4
V
VOL
Low-level output voltage
DOUT at RL = 3 kΩ to GND,
DIN = VCC
–5
–5.4
V
IIH
High-level input current
VI = VCC
±0.01
±1
μA
IIL
Low-level input current
VI at GND
±0.01
±1
μA
IOS (3)
Short-circuit output current
±35
±60
mA
rO
Output resistance
(1)
(2)
(3)
VCC = 3.6 V
VO = 0 V
VCC = 5.5 V
VO = 0 V
VCC = 0 V, V+ = 0 V, and V–
VO = ±2 V
=0V
300
10M
Ω
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
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.
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6.7 Electrical Characteristics—Receiver
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)(1) (see Figure 9-1)
PARAMETER
VOH
High-level output voltage
IOH = –1 mA
VOL
Low-level output voltage
IOL = 1.6 mA
VIT+
Positive-going input threshold voltage
VIT–
Negative-going input threshold voltage
Vhys
Input hysteresis (VIT+ – VIT–)
rI
Input resistance
(1)
(2)
MIN
TYP(2)
VCC – 0.6
VCC – 0.1
TEST CONDITIONS
MAX
V
0.4
VCC = 3.3 V
1.5
2.4
VCC = 5 V
1.8
2.4
VCC = 3.3 V
0.6
1.2
VCC = 5 V
0.8
1.5
3
V
V
V
0.3
VI = ±3 V to ±25 V
UNIT
V
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.
6.8 Switching Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)(1) (see Figure 9-1)
PARAMETER
TEST CONDITIONS
Maximum data rate
RL = 3 kΩ,
CL = 1000 pF
One DOUT switching,
See Figure 7-1
tsk(p)
Driver Pulse skew(3)
RL = 3 kΩ to 7 kΩ,
SR(tr)
Driver Slew rate, transition region
(see Figure 7-1)
RL = 3 kΩ to 7 kΩ,
VCC = 5 V
tPLH
Receiver Propagation delay time, lowto high-level output
tPHL
Receiver Propagation delay time,
high- to low-level output
tsk(p)
Receiver Pulse skew(1)
(1)
(2)
(3)
MIN
TYP(2)
150
250
kbps
300
ns
CL = 150 to 2500 pF
See Figure 7-2
MAX
CL = 150 to 1000 pF
6
30
CL = 150 to 2500 pF
4
30
UNIT
V/μs
300
ns
300
ns
300
ns
CL = 150 pF
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.
6.9 Typical Characteristics
VCC = 3.3 V
1
6
VOH
0
±1
4
VOL (V)
VOH (V)
5
3
2
±3
±4
1
±5
0
±6
0
5
10
15
Output Current (mA)
20
25
VOL
0
5
10
15
Output Current (mA)
C001
Figure 6-1. DOUT VOH vs Load Current, Both Drivers Loaded
6
±2
20
25
C001
Figure 6-2. DOUT VOL vs Load Current, Both Drivers Loaded
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7 Parameter Measurement Information
3V
Input
Generator
(see Note B)
1.5 V
RS-232
Output
50 W
RL
1.5 V
0V
tTHL
CL
(see Note A)
tTLH
3V
Output
3V
-3 V
-3 V
TEST CIRCUIT
SR(tr) =
A.
B.
VOH
VOL
VOLTAGE WAVEFORMS
6V
tTHL or tTLH
CL includes probe and jig capacitance.
The pulse generator has the following characteristics: PRR = 250 kbps, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
Figure 7-1. Driver Slew Rate
3V
Generator
(see Note B)
RS-232
Output
50 W
RL
Input
1.5 V
1.5 V
0V
CL
(see Note A)
tPHL
tPLH
VOH
50%
50%
Output
VOL
TEST CIRCUIT
A.
B.
VOLTAGE WAVEFORMS
CL includes probe and jig capacitance.
The pulse generator has the following characteristics: PRR = 250 kbps, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
Figure 7-2. Driver Pulse Skew
3V
Input
Generator
(see Note B)
1.5 V
1.5 V
-3 V
Output
50 W
tPHL
CL
(see Note A)
tPLH
VOH
50%
50%
Output
VOL
TEST CIRCUIT
A.
B.
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.
Figure 7-3. Receiver Propagation Delay Times
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8 Detailed Description
8.1 Overview
The TRS3232 device consists of two line drivers, two line receivers, and a dual charge-pump circuit with
±15-kV ESD protection terminal to terminal (serial-port connection terminals, including GND). The device
meets the requirements of TIA/EIA-232-F and 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 one 3-V to 5.5-V supply. The device operates at data signaling rates up to 250 kbps and a
maximum of 30-V/μs driver output slew rate. Outputs are protected against shorts to ground.
8.2 Functional Block Diagram
3.3 V, 5 V
POWER
2
DIN
2
TX
2
ROUT
DOUT
RS232
RX
2
RIN
RS232
8.3 Feature Description
8.3.1 Power
The power block increases, inverts, and regulates voltage at V+ and V– pins using a charge pump that requires
four external capacitors.
8.3.2 RS232 Driver
Two drivers interface the standard logic level to RS232 levels. Both DIN inputs must be valid high or low.
8.3.3 RS232 Receiver
Two receivers interface RS232 levels to standard logic levels. An open input results in a high output on ROUT.
Each RIN input includes an internal standard RS232 load.
8
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8.4 Device Functional Modes
Table 8-1. Each Driver
(1)
INPUT DIN(1)
OUTPUT DOUT
L
H
H
L
H = high level, L = low level
Table 8-2. Each Receiver
(1)
INPUT RIN(1)
OUTPUT ROUT
L
H
H
L
Open
H
H = high level, L = low level,
Open = input disconnected or connected driver off
8.4.1 VCC Powered by 3 V to 5.5 V
The device is in normal operation.
8.4.2 VCC Unpowered, VCC = 0 V
When the TRS3232 device is unpowered, it can be safely connected to an active remote RS232 device.
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9 Application and Implementation
Note
Information in the following applications sections is not part of the TI component specification,
and TI does not warrant its accuracy or completeness. TI’s customers are responsible for
determining suitability of components for their purposes, as well as validating and testing their design
implementation to confirm system functionality.
9.1 Application Information
The TRS3232 is designed to convert single-ended signals into RS232-compatible signals, and vice-versa.
This device can be used in any application where an RS232 line driver or receiver is required. One benefit of this
device is its ESD protection, which helps protect other components on the board when the RS232 lines are tied
to a physical connector.
9.2 Typical Application
1
-
16
+ CBYPASS
- = 0.1 mF
+
C1
VCC
C1+
2
(A)
† +
C3
V+
GND
15
3
4
14
DOUT1
C113
C2+
+
C2
RIN1
5 kW
5 C212
6
C4
DOUT2
RIN2
-
V-
11
ROUT1
DIN1
+
7
10
8
9
DIN2
ROUT2
5 kW
A.
B.
C.
D.
C3 can be connected to VCC or GND.
Resistor values shown are nominal.
Nonpolarized ceramic capacitors are acceptable. If polarized tantalum or electrolytic capacitors are used, they must be connected as
shown.
See Table 9-1 for capacitor values.
Figure 9-1. Typical Operating Circuit
10
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9.2.1 Design Requirements
•
•
Recommended VCC is 3.3 V or 5 V
– 3 V to 5.5 V is also possible
Maximum recommended bit rate is 250 kbites
Table 9-1. VCC versus Capacitor Values
VCC
C1
C2, C3, C4
3.3 V ± 0.3 V
0.1 µF
0.1 µF
5 V ± 0.5 V
0.047 µF
0.33 µF
3 V to 5.5 V
0.1 µF
0.47 µF
9.2.2 Detailed Design Procedure
For proper operation, add capacitors as shown in Figure 9-1 and Table 9-1.
All DIN inputs must be connected to valid low or high logic levels.
Select capacitor values based on VCC level for best performance.
Voltage (V)
9.2.3 Application Curve
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
DIN
DOUT to RIN
ROUT
0
1
2
3
4
5
6
7
Time (µs)
8
9
10
C001
Figure 9-2. 250 kbps Driver to Receiver Loopback Timing Waveform, VCC= 3.3 V
10 Power Supply Recommendations
VCC must be between 3 V and 5.5 V. Charge pump capacitors must be chosen using Table 9-1.
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11 Layout
11.1 Layout Guidelines
Keep the external capacitor traces short. This is more important on C1 and C2 nodes that have the fastest rise
and fall times.
11.2 Layout Example
Ground
C3
C1
1 C1+
VCC 16
2 V+
GND 15
3 C1–
DOUT1 14
4 C2+
RIN1 13
5 C2–
ROUT1 12
VCC
0.1µF
Ground
C2
Ground
6 V–
DIN1 11
7 DOUT2
DIN2 10
C4
8 RIN2
ROUT2 9
Figure 11-1. Layout Diagram
12
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12 Device and Documentation Support
12.1 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. Click on
Subscribe to updates to register and receive a weekly digest of any product information that has changed. For
change details, review the revision history included in any revised document.
12.2 Support Resources
TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight
from the experts. Search existing answers or ask your own question to get the quick design help you need.
Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do
not necessarily reflect TI's views; see TI's Terms of Use.
12.3 Trademarks
TI E2E™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
12.4 Electrostatic Discharge Caution
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled
with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
12.5 Glossary
TI Glossary
This glossary lists and explains terms, acronyms, and definitions.
13 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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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)
Samples
(4/5)
(6)
TRS3232CDBR
ACTIVE
SSOP
DB
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
RS32C
Samples
TRS3232CDWR
ACTIVE
SOIC
DW
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
TRS3232C
Samples
TRS3232IPWR
ACTIVE
TSSOP
PW
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
RS32I
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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