•Auto-Powerdown Plus Option Features
Flexible Power-Saving Mode
•Operates From a Single 2.25-V to 3-V V
Supply
•Designed to be Interchangeable With Industry
Standard '3318 Devices
APPLICATIONS
•Battery-Powered Systems
•PDAs
•Cellular Phones
•Notebooks
•Hand-Held Equipment
•Pagers
CC
SLLS805B –APRIL 2007–REVISED OCTOBER 2013
DESCRIPTION
The TRS3318E is a dual-driver, dual-receiver, RS232-compatible transceiver. The device features
auto-powerdown plus and enhanced electrostatic
discharge (ESD) protection integrated into the chip.
Driver output and receiver input are protected to ±15
kV using the IEC 61000-4-2 Air-Gap Discharge
method, ±8 kV using the IEC 61000-4-2 Contact
Discharge method, and ±15 kV using the HumanBody Model (HBM).
The device operates at a data rate of 460 kbps. The
transceiver has a proprietary low-dropout driver
output stage, enabling RS-232-compatible operation
from a 2.25-V to 3-V supply with a dual charge pump.
Thechargepumprequiresonlyfour0.1-µF
capacitors and features a logic-level output (READY)
that asserts when the charge pump is regulating and
the device is ready to begin transmitting.
The TRS3318E achieves a 1-µA supply current using
theauto-powerdownfeature.Thisdevice
automatically enters a low-power power-down mode
when the RS-232 cable is disconnected or the drivers
of the connected peripherals are inactive for more
than 30 s. The device turns on again when it senses
a valid transition at any driver or receiver input. Autopowerdown saves power without changes to the
existing BIOS or operating system.
Thisdeviceisavailableintwospace-saving
packages: 20-pin SSOP and 20-pin TSSOP.
1
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.
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.
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.
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DETAILED DESCRIPTION
Flexible control options for power management are featured when the serial port and driver inputs are inactive.
The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode of
operation, if the device does not sense valid signal transitions on all receiver and driver inputs for approximately
30 s, the built-in charge pump and drivers are powered down, reducing the supply current to 1 µA. By
disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus can be disabled when
FORCEON and FORCEOFF are high. With auto-powerdown plus enabled, the device activates automatically
when a valid signal is applied to any receiver or driver input. INVALID is high (valid data) if any 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
(typical number). INVALID is low (invalid data) if all receiver input voltage are between –0.3 V and 0.3 V for more
than 30 µs (typical number).
FUNCTION TABLE
INPUT CONDITIONSOUTPUT STATES
RECEIVER
FORCEONFORCEOFFLEVELDRIVERRECEIVERINVALIDREADY
HHNoNoActiveActiveLHauto-powerdown
HHNoYesActiveActiveHHauto-powerdown
LHYesNoActiveActiveLHauto-powerdown
LHYesYesActiveActiveHHauto-powerdown
LHNoNoZActiveLLauto-powerdown
LHNoYesZActiveHLauto-powerdown
XLXNoZActiveLL
XLXYesZActiveHL
INVALIDINVALIDXNoZActiveLLauto-powerdown
INVALIDINVALIDXYesActiveActiveHHauto-powerdown
(1) H = high level, L = low level, X = irrelevant, Z = high impedance
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.
–0.37V
–70.3V
13V
Recommended Operating Conditions
See Figure 4
MIN NOMMAX UNIT
Supply voltage2.252.53V
VIHDriver and control high-level input voltageVCC= 2.5 V to 3 V0.7 × V
VILDriver and control low-level input voltageVCC= 2.5 V to 3 V00.3 × V
VIReceiver input voltage–2525V
over recommended ranges of supply voltage and operating free-air temperature,
VCC= 2.25 V to 3 V, C1–C4 = 0.1 µF, TA= T
PARAMETERTEST CONDITIONSMINTYP
DC Characteristics (VCC= 2.5 V, TA= 25°C)
Auto-powerdown plus supply current FORCEON = GND, FORCEOFF = VCC, All RIN and DIN idle110µA
Auto-powerdown supply currentFORCEOFF = GND110µA
Supply currentFORCEON = FORCEOFF = VCC, No load0.32mA
over recommended ranges of supply voltage and operating free-air temperature,
VCC= 2.25 V to 3 V, C1–C4 = 0.1 µF, TA= T
PARAMETERTEST CONDITIONSMIN TYP
Driver input hysteresis0.3V
Input leakage currentFORCEON, DIN, FORCEOFF±0.01±1µA
Output voltage swingAll driver outputs loaded with 3 kΩ to ground±3.7±4V
Output resistanceVCC= 0, Driver output = ±2 V30010MΩ
Output short-circuit current
Output leakage currentVCC= 0 or 2.25 V to 3 V, V
(1) Typical values are at VCC= 2.5 V, TA= 25°C.
(2) 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.
(2)
MIN
to T
(unless otherwise noted) (see Figure 4)
MAX
= ±12 V, Drivers disabled±25µA
OUT
(1)
MAXUNIT
±25±60mA
Switching Characteristics
over recommended ranges of supply voltage and operating free-air temperature,
VCC= 2.25 V to 3 V, C1–C4 = 0.1 µF, TA= T
PARAMETERTEST CONDITIONSMINTYP
Maximum data rateRL= 3 kΩ, CL= 1000 pF, One transmitter switching460kbps
|t
– t
PHL
| Driver skew
PLH
Transition-region slew rateMeasured from 3 V to –3 V or –3 V to 3 V,430 V/µs
(2)
MIN
to T
(unless otherwise noted) (see Figure 1)
MAX
VCC= 2.5 V, TA= 25°C, RL= 3 kΩ to 7 kΩ,
CL= 150 pF to 2500 pF
(1)
MAX UNIT
100ns
(1) Typical values are at VCC= 2.5 V, TA= 25°C.
(2) Pulse skew is defined as |t
over recommended ranges of supply voltage and operating free-air temperature,
VCC= 2.25 V to 3 V, C1–C4 = 0.1 µF, TA= T
PARAMETERTEST CONDITIONSMIN TYP
Input voltage range–2525V
Input threshold lowTA= 25°C0.3 × V
Input threshold highTA= 25°C0.7 × V
Input hysteresis0.3V
Input resistanceTA= 25°C357kΩ
Output leakage current±0.05±10µA
Output voltage lowI
Output voltage highI
(1) Typical values are at VCC= 2.5 V, TA= 25°C.
= 0.5 mA0.1 × V
OUT
= –0.5 mA0.9 × V
OUT
MIN
to T
(unless otherwise noted) (see Figure 4)
MAX
CC
CC
(1)
MAXUNIT
CC
CC
Switching Characteristics
over recommended ranges of supply voltage and operating free-air temperature,
VCC= 2.25 V to 3 V, C1–C4 = 0.1 µF (unless otherwise noted) (see Figure 4)
(1)
0.175
0.175
50ns
t
t
|t
PHL
PLH
PHL
Receiver propagation delayRIN to ROUT, CL= 150 pFµs
– t
|Receiver skew
PLH
PARAMETERTEST CONDITIONSTYP
(2)
V
V
V
V
UNIT
(1) Typical values are at VCC= 2.5 V, TA= 25°C.
(2) Pulse skew is defined as |t
Auto-Powerdown Plus Section
Electrical Characteristics
over recommended ranges of supply voltage and operating free-air temperature,
VCC= 2.25 V to 3 V, C1–C4 = 0.1 µF, TA= T
PARAMETERTEST CONDITIONSMINMAXUNIT
Receiver input threshold to INVALID highV
Receiver input threshold INVALID low–0.30.3V
INVALID, READY voltage lowI
INVALID, READY voltage highI
MIN
to T
(unless otherwise noted) (see Figure 4)
MAX
Positive threshold2.7
Negative threshold–2.7
= 0.5 mA0.1 × V
OUT
= –0.5 mA0.8 × V
OUT
CC
CC
Switching Characteristics
over recommended ranges of supply voltage and operating free-air temperature,
VCC= 2.25 V to 3 V, C1–C4 = 0.1 µF, TA= T
PARAMETERTEST CONDITIONSMINTYP
t
INVH
t
INVL
t
WU
t
AUTOPRDN
Receiver positive or negative threshold to INVALID highVCC= 2.5 V1µs
Receiver positive or negative threshold to INVALID lowVCC= 2.5 V30µs
Receiver or driver edge to driver enabledVCC= 2.5 V100µs
Receiver or driver edge to driver shutdownVCC= 2.5 V153060s
TRS3318ECDBRACTIVESSOPDB202000RoHS & GreenNIPDAULevel-1-260C-UNLIM0 to 70RV18EC
TRS3318ECPWACTIVETSSOPPW2070RoHS & GreenNIPDAULevel-1-260C-UNLIM0 to 70RV18EC
TRS3318ECPWRACTIVETSSOPPW202000RoHS & GreenNIPDAULevel-1-260C-UNLIM0 to 70RV18EC
TRS3318EIDBACTIVESSOPDB2070RoHS & GreenNIPDAULevel-1-260C-UNLIM0 to 70RV18EI
TRS3318EIDBRACTIVESSOPDB202000RoHS & GreenNIPDAULevel-1-260C-UNLIM-40 to 85RV18EI
TRS3318EIPWACTIVETSSOPPW2070RoHS & GreenNIPDAULevel-1-260C-UNLIM-40 to 85RV18EI
TRS3318EIPWRACTIVETSSOPPW202000RoHS & GreenNIPDAULevel-1-260C-UNLIM-40 to 85RV18EI
TRS3318EIPWRG4ACTIVETSSOPPW202000RoHS & GreenNIPDAULevel-1-260C-UNLIM-40 to 85RV18EI
(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.
Package Type Package
(1)
Drawing
Pins Package
Qty
Eco Plan
(2)
Lead finish/
Ball material
(6)
MSL Peak Temp
(3)
Op Temp (°C)Device Marking
(4/5)
(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 <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
Samples
Addendum-Page 1
PACKAGE OPTION ADDENDUM
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10-Dec-2020
(6)
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two
lines if the finish value exceeds the maximum column width.
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.
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not
exceed 0.15 mm per side.
4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.25 mm per side.
5. Reference JEDEC registration MO-150.
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2 MAX
0.05 MIN
EXAMPLE BOARD LAYOUT
SSOP - 2 mm max heightDB0020A
SMALL OUTLINE PACKAGE
20X (0.45)
18X (0.65)
1
10
20X (1.85)
SYMM
(R0.05) TYP
20
SYMM
11
(7)
LAND PATTERN EXAMPLE
EXPOSED METAL SHOWN
SCALE: 10X
SOLDER MASK
OPENING
EXPOSED METAL
0.07 MAX
ALL AROUND
NON-SOLDER MASK
DEFINED
(PREFERRED)
METAL
15.000
SOLDER MASK DETAILS
METAL UNDER
SOLDER MASK
0.07 MIN
ALL AROUND
SOLDER MASK
DEFINED
NOTES: (continued)
6. Publication IPC-7351 may have alternate designs.
7. Solder mask tolerances between and around signal pads can vary based on board fabrication site.
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SOLDER MASK
OPENING
EXPOSED METAL
4214851/B 08/2019
EXAMPLE STENCIL DESIGN
SSOP - 2 mm max heightDB0020A
SMALL OUTLINE PACKAGE
20X (0.45)
18X (0.65)
1
10
20X (1.85)
SYMM
(R0.05) TYP
20
SYMM
11
(7)
SOLDER PASTE EXAMPLE
BASED ON 0.125 mm THICK STENCIL
SCALE: 10X
4214851/B 08/2019
NOTES: (continued)
8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
9. Board assembly site may have different recommendations for stencil design.
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