TRS3237E
www.ti.com
SLLS796A – JUNE 2007 – REVISED JANUARY 2010
3-V TO 5.5-V MULTICHANNEL RS-232 1-MBit/s LINE DRIVER/RECEIVER
Check for Samples: TRS3237E
FEATURES
1
•
•
•
•
•
•
•
•
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 From 250 kbits/s to 1 Mbit/s
Low Standby Current . . . 1 mA Typical
External Capacitors . . . 4 × 0.1 mF
Accepts 5-V Logic Input With 3.3-V Supply
Designed to Be Interchangeable With Industry
Standard '3237E Devices
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
•
ESD Protection for RS-232 I/O Pins
– ±15 kV – Human-Body Model (HBM)
– ±8 kV – IEC61000-4-2, Contact Discharge
– ±15 kV – IEC61000-4-2, Air-Gap Discharge
APPLICATIONS
•
•
•
•
•
Battery-Powered, Hand-Held, and Portable
Equipment
PDAs and Palmtop PCs
Notebooks, Sub-Notebooks, and Laptops
Digital Cameras
Mobile Phones and Wireless Devices
RHB PACKAGE
(TOP VIEW)
1
28
2
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
C1+
V+
VCC
C1−
DIN1
DIN2
DIN3
ROUT1
ROUT2
DIN4
ROUT3
DIN5
ROUT1B
MBAUD
32 31 30 29 28 27 26 25
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
N.C.
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
C1–
DIN1
IN2
DIN3
ROUT1
ROUT2
DIN4
ROUT3
9 10 11 12 13 14 15 16
DOUT5
EN
SHDN
MBAUD
N.C.
ROUT1B
DIN5
N.C.
C2 +
GND
C2−
V−
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
DOUT5
EN
SHDN
V−
C2–
GND
C2+
C1+
V+
VCC
N.C.
DB, DW, OR PW PACKAGE
(TOP VIEW)
N.C.– Not internally connected
DESCRIPTION/ORDERING INFORMATION
The TRS3237E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV ESD
protection pin to pin (serial-port connection pins, 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 a single 3-V to
5.5-V supply. This device operates at data signaling rates of 250 kbit/s in normal operating mode
(MBAUD = GND) and 1Mbit/s when MBAUD = VCC. The driver output slew rate is a maximum of 30 V/ms.
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 © 2007–2010, Texas Instruments Incorporated
TRS3237E
SLLS796A – JUNE 2007 – REVISED JANUARY 2010
www.ti.com
The TRS3237E transmitters are disabled and the outputs are forced into high-impedance state when the device
is in shutdown mode (SHDN = GND) and the supply current falls to less than 1 mA. Also, during shutdown, the
onboard charge pump is disabled; V+ is lowered to VCC, and V– is raised toward GND. Receiver outputs also
can be placed in the high-impedance state by setting enable (EN) high. ROUT1B remains active all the time,
regardless of the EN and SHDN condition.
The TRS3237EC is characterized for operation from 0°C to 70°C. The TRS3237EI is characterized for operation
from –40°C to 85°C.
Table 1. ORDERING INFORMATION (1)
PACKAGE (2)
TA
0°C to 70°C
–40°C to 85°C
(1)
(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
SSOP – DB
Reel of 2000
TRS3237ECDBR
TRS3237EC
SOIC – DW
Reel of 2000
TRS3237ECDWR
TRS3237EC
TSSOP – PW
Reel of 2000
TRS3237ECPWR
RS37EC
QFN – RHB
Reel of 2000
TRS3237ECRHBR
PREVIEW
SSOP – DB
Reel of 2000
TRS3237EIDBR
TRS3237EI
SOIC – DW
Reel of 2000
TRS3237EIDWR
TRS3237EI
TSSOP – PW
Reel of 2000
TRS3237EIPWR
RS37EI
QFN – RHB
Reel of 2000
TRS3237EIRHBR
PREVIEW
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.
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
Table 2. FUNCTION TABLE
INPUTS
(1)
2
OUTPUTS
SHDN
EN
DOUT
ROUT
ROUT1B
0
0
Z (1)
Active
Active
0
1
Z (1)
Z (1)
Active
1
0
Active
Active
Active
1
1
Active
Z (1)
Active
Z = high impedance (off)
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Product Folder Link(s): TRS3237E
TRS3237E
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SLLS796A – JUNE 2007 – REVISED JANUARY 2010
LOGIC DIAGRAM (POSITIVE LOGIC)
DIN1
DIN2
DIN3
DIN4
DIN5
SHDN
MBAUD
ROUT1B
ROUT1
ROUT2
ROUT3
EN
24
5
23
6
22
7
19
10
17
12
DOUT1
DOUT2
DOUT3
DOUT4
DOUT5
14
15
16
21
8
20
9
18
11
RIN1
RIN2
RIN3
13
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Product Folder Link(s): TRS3237E
3
TRS3237E
SLLS796A – JUNE 2007 – REVISED JANUARY 2010
www.ti.com
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
V–
Negative-output supply voltage range (2)
0.3
–7
V
13
V
V+ – V–
Supply voltage difference
VI
Input voltage range
VO
Output voltage range
(2)
Package thermal impedance
Tstg
Storage temperature range
(1)
(2)
(3)
–0.3
6
Receiver
–25
25
Driver
Receiver
Short-circuit duration
qJA
Driver (SHDN, MBAUD, EN)
DOUT to GND
–13.2
13.2
–0.3
VCC + 0.3
UNIT
V
V
Unlimited
(3)
–65
62
°C/W
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.
The package thermal impedance is calculated in accordance with JESD 51-7.
RECOMMENDED OPERATING CONDITIONS (1)
See Figure 5
VCC = 3.3 V
Supply voltage
VCC = 5 V
VIH
Driver and control high-level input voltage
DIN, SHDN, MBAUD, EN
VIL
Driver and control low-level input voltage
DIN, SHDN, MBAUD, EN
VI
Receiver input voltage
TA
Operating free-air temperature
(1)
VCC = 3.3 V
VCC = 5 V
TRS3237EC
TRS3237EI
MIN
NOM
MAX
3
3.3
3.6
4.5
5
5.5
2
5.5
2.4
5.5
UNIT
V
V
0
0.8
V
–25
25
V
0
70
–40
85
°C
Test conditions are C1–C4 = 0.1 mF at VCC = 3 V to 5 V.
ELECTRICAL CHARACTERISTICS (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
II
Input leakage current
ICC
Supply current
(TA = 25°C)
TEST CONDITIONS
DIN, SHDN, MBAUD, EN
No load, SHDN = VCC
(1)
(2)
4
SHDN = GND
Shutdown supply current
SHDN = RIN = GND,
DIN = GND or VCC
MIN TYP (2)
MAX
9
18
mA
0.5
2
mA
1
10
mA
10
300
nA
UNIT
Test conditions are C1–C4 = 0.1 mF at VCC = 3 V to 5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
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TRS3237E
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SLLS796A – JUNE 2007 – REVISED JANUARY 2010
DRIVER SECTION ELECTRICAL CHARACTERISTICS (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
MIN TYP (2)
TEST CONDITIONS
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)
VCC = 3.6 V or 3.3 V,
VO = 0 V
ro
Output resistance
VCC, V+, and V– = 0 V,
VO = ±2 V
(1)
(2)
(3)
±0.01
±0.01
300
MAX
UNIT
V
V
±1
mA
±1
mA
±60
mA
Ω
50k
Test conditions are C1–C4 = 0.1 mF at VCC = 3 V to 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.
DRIVER SECTION SWITCHING CHARACTERISTICS (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
TEST CONDITIONS
MIN
CL = 1000 pF,
MBAUD = GND
Maximum data rate
CL = 1000 pF,
VCC = 4.5 V to 5.5 V,
MBAUD = VCC
MAX
UNIT
250
RL = 3 kΩ, 1 DIN switching,
See Figure 1
CL = 250 pF,
VCC = 3 V to 4.5 V,
MBAUD = VCC
1000
kbit/s
1000
tsk(p)
Pulse skew (3)
CL = 150 pF to 2500 pF, RL = 3 kΩ to 7 kΩ,
MBAUD = VCC or GND, See Figure 2
SR(tr)
Slew rate,
transition region
(see Figure 1)
VCC = 3.3 V,
RL = 3 kΩ to 7 kΩ,
TA = 25°C
(1)
(2)
(3)
TYP (2)
100
MBAUD =
CL = 150 pF to 1000 pF GND
MBAUD = VCC
CL = 150 pF to 2500
pF,
MBAUD =
GND
ns
6
30
24
150
4
30
V/ms
Test conditions are C1–C4 = 0.1 mF at VCC = 3 V to 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.
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TRS3237E
SLLS796A – JUNE 2007 – REVISED JANUARY 2010
www.ti.com
RECEIVER SECTION ELECTRICAL CHARACTERISTICS (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
VOH
High-level output voltage
IOH = –1 mA
VOL
Low-level output voltage
IOL = 1 mA
TYP (2)
VCC – 0.6
VCC – 0.1
MAX
VCC = 3.3 V
Positive-going input threshold voltage
VIT–
Negative-going input threshold voltage
Vhys
Input hysteresis (VIT+ – VIT–)
Ioz
Output leakage current
EN = VCC
ri
Input resistance
VI = ±3 V to ±25 V
1.5
2.4
2
2.4
VCC = 5 V
VCC = 3.3 V
0.6
1.1
VCC = 5 V
0.8
1.5
UNIT
V
0.4
VIT+
(1)
(2)
MIN
TEST CONDITIONS
V
V
V
0.5
V
±0.05
±10
mA
5
7
kΩ
3
Test conditions are C1–C4 = 0.1 mF at VCC = 3 V to.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
RECEIVER SECTION SWITCHING CHARACTERISTICS (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TYP (2)
UNIT
tPLH
Propagation delay time, low- to high-level output
CL = 150 pF, See Figure 3
150
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
2.6
ms
tdis
Output disable time
CL = 150 pF, RL = 3 kΩ, See Figure 4
2.4
ms
tsk(p)
Pulse skew (3)
See Figure 3
50
ns
TYP
UNIT
(1)
(2)
(3)
ns
Test conditions are C1–C4 = 0.1 mF at VCC = 3 V to 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
PIN
DOUT, RIN
6
TEST CONDITIONS
IEC61000-4-2, Contact Discharge
±8
IEC61000-4-2, Air-Gap Discharge
±15
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kV
Copyright © 2007–2010, Texas Instruments Incorporated
Product Folder Link(s): TRS3237E
TRS3237E
www.ti.com
SLLS796A – JUNE 2007 – REVISED JANUARY 2010
PARAMETER MEASUREMENT INFORMATION
3V
Generator
(see Note B)
Input
RS-232
Output
50 Ω
RL
tTHL
CL
(see Note A)
3V
SHDN = VCC
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)
tPLH
tPHL
VOH
3V
SHDN = VCC
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
EN = GND
3V
Input
1.5 V
1.5 V
−3 V
Output
Generator
(see Note B)
tPHL
50 Ω
3V
EN = GND
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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TRS3237E
SLLS796A – JUNE 2007 – REVISED JANUARY 2010
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PARAMETER MEASUREMENT INFORMATION (continued)
3V
Input
VCC
3 V or 0 V
1.5 V
GND
S1
−3 V
tPZH
(S1 at GND)
tPHZ
(S1 at GND)
RL
3 V or 0 V
1.5 V
VOH
Output
50%
Output
CL
(see Note A)
EN
Generator
(see Note B)
50 Ω
0.3 V
tPZL
(S1 at VCC)
tPLZ
(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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TRS3237E
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SLLS796A – JUNE 2007 – REVISED JANUARY 2010
APPLICATION INFORMATION
CBYPASS = 0.1 µF
+
−
1
2
+
C2
V+
28
27
+
GND
C3†
−
−
3
4
−
+
C1+
C2+
C2−
VCC
V−
C1−
C4
DOUT1
DOUT2
DOUT3
RIN1
+
−
26
C1
25
5
24
6
23
7
22
8
21
DIN1
DIN2
DIN3
ROUT1
5 kΩ
RS-232 Port
RIN2
9
20
ROUT2
Logic I/Os
5 kΩ
DOUT4
RIN3
10
19
11
18
DIN4
ROUT3
5 kΩ
DOUT5
12
17
16
EN
SHDN
13
14
15
DIN5
ROUT1B
MBAUD
†
C3 can be connected to VCC or GND.
NOTES: A. Resistor values shown are nominal.
B. Nonpolarized ceramic capacitors are acceptable. If polarized tantalum or
electrolytic capacitors are used, they should be connected as shown.
VCC vs CAPACITOR VALUES
VCC
3.3 V ± 0.15 V
3.3 V ± 0.3 V
5 V ± 0.5 V
3 V to 5.5 V
C1
0.1 µF
0.22 µF
0.047 µF
0.22 µF
C2, C3, and C4
0.1 µF
0.22 µF
0.33 µF
1 µF
Figure 5. Typical Operating Circuit and Capacitor Values
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9
PACKAGE OPTION ADDENDUM
www.ti.com
23-Apr-2022
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)
TRS3237ECDBR
ACTIVE
SSOP
DB
28
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
TRS3237EC
TRS3237ECPWR
ACTIVE
TSSOP
PW
28
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
RS37EC
TRS3237EIDB
ACTIVE
SSOP
DB
28
50
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TRS3237EI
TRS3237EIDBR
ACTIVE
SSOP
DB
28
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
TRS3237EI
TRS3237EIPWR
ACTIVE
TSSOP
PW
28
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
RS37EI
(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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