TRS3227 Datasheet, PDF (1/15 Pages) Texas Instruments – 3-V TO 5.5-V SINGLE-CHANNEL RS-232 LINE DRIVER/RECEIVER

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TRS3227
3-V TO 5.5-V SINGLE-CHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV ESD PROTECTION
SLLS821 – JULY 2007
FEATURES
• Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
• Operates With 3-V to 5.5-V V_CC Supply
• Operates at Least 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
• Designed to Be Interchangeable With industry
Standard '3227 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
– ±8 kV – IEC61000-4-2, Contact Discharge
– ±8 kV – IEC61000-4-2, Air-Gap Discharge
• Auto-Powerdown Plus Feature Automatically
Disables Drivers for Power Savings
• Packaged in Plastic Shrink Small-Outline
Package
APPLICATIONS
• Battery-Powered, Hand-Held, and Portable
Equipment
• PDAs and Palmtop PCs
• Notebooks, Sub-Notebooks, and Laptops
• Digital Cameras
• Mobile Phones and Wireless Devices
DB PACKAGE
(TOP VIEW)
READY 1
C1+ 2
V+ 3
C1− 4
C2+ 5
C2− ⁶
V− ⁷
RIN ⁸
16 FORCEOFF
15 V_CC
14 GND
13 DOUT
12 FORCEON
11 _DIN
10 _INVALID
9 _ROUT
DESCRIPTION/ORDERING INFORMATION
The TRS3227 consists of one line driver, one line receiver, 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 1 Mbit/s in normal operating mode and a maximum
of 30-V/μs driver output slew rate. This device also features a logic-level output (READY) that asserts when the
charge pump is regulating and the device is ready to begin transmitting.
The TRS3227 achieves a 1-μA supply current using the auto-powerdown plus feature. This device automatically
enters a low-power powerdown mode when the RS-232 cable is disconnected or the drivers of the connected
peripherals are inactive for more than 30 s. It turns on again when it senses a valid transition at any driver or
receiver input. Auto-powerdown saves power without changes to the existing BIOS or operating system.
The TRS3227C is characterized for operation from 0°C to 70°C. The TRS3227I is characterized for operation
from –40°C to 85°C.
T_A
0°C to 70°C
–40°C to 85°C
SSOP – DB
SSOP – DB
ORDERING INFORMATION
PACKAGE ^{(1) (2)}
ORDERABLE PART NUMBER
Reel of 2000
TRS3227CDBR
Reel of 2000
TRS3227IDBR
TOP-SIDE MARKING
RS27C
RS27I
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
(2) 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.
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