TRS3238ECPW

www.ti.com TRS3238E 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD (HBM) PROTECTION SLLS797 – JUNE 2007 FEATURES • • • • • • • • • • • RS-232 Bus-Pin 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 400 kbit/s Five Drivers and Three Receivers Auto-Powerdown Plus Feature Enables Flexible Power-Down Mode Low Standby Current . . . 1 μA Typical External Capacitors . . . 4 × 0.1 μF Accepts 5-V Logic Input With 3.3-V Supply Always-Active Noninverting Receiver Output (ROUT1B) Alternative High-Speed Pin-Compatible Device (1 Mbit/s) for TRSF3238 ESD Protection for RS-232 Interface Pins – ±15 kV – Human-Body Model (HBM) – ±8 kV – IEC61000-4-2, Contact Discharge – ±15 kV – IEC61000-4-2, Air-Gap Discharge DB, DW, OR PW PACKAGE (TOP VIEW) C2 + GND C2VDOUT1 DOUT2 DOUT3 RIN1 RIN2 DOUT4 RIN3 DOUT5 FORCEON FORCEOFF 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 C1DIN1 DIN2 DIN3 ROUT1 ROUT2 DIN4 ROUT3 DIN5 ROUT1B INVALID 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 DIN2 DIN3 ROUT1 ROUT2 DIN4 ROUT3 9 10 11 12 13 14 15 16 DOUT5 FORCEON FORCEOFF INVALID N.C. ROUT1B DIN5 N.C. Battery-Powered Systems PDAs Notebooks Subnotebooks Laptops Palmtop PCs Hand-Held Equipment Modems Printers 28 2 RHB PACKAGE (TOP VIEW) APPLICATIONS • • • • • • • • • 1 VC2– GND C2+ C1+ V+ VCC N.C. • N.C. - Not inter nally connected DESCRIPTION/ORDERING INFORMATION The TRS3238E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between notebook and subnotebook computer applications. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT1B), which allows applications using the ring indicator to transmit data while the device is powered down. This device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/μs driver output slew rate. 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. UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2007, Texas Instruments Incorporated TRS3238E 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD (HBM) PROTECTION www.ti.com SLLS797 – JUNE 2007 DESCRIPTION/ORDERING INFORMATION (CONTINUED) 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 occurs if there is no activity in the logic levels for the driver inputs. 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. INVALID is low (invalid data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 μs. Refer to Figure 5 for receiver input levels. ORDERING INFORMATION TA PACKAGE (1) (2) 2 TOP-SIDE MARKING TRS3238ECDB Reel of 2000 TRS3238ECDBR Tube of 50 TRS3238ECPW Reel of 2000 TRS3238ECPWR SOIC – DW Reel of 2000 TRS3238ECDWR TRS3238EC QFN – RHB Reel of 2000 TRS3238ECRHBR PREVIEW Tube of 50 TRS3238EIDB Reel of 2000 TRS3238EIDBR Tube of 50 TRS3238EIPW Reel of 2000 TRS3238EIPWR SOIC – DW Reel of 2000 TRS3238ICDWR TRS3238EI QFN – RHB Reel of 2000 TRS3238EIRHBR PREVIEW TSSOP – PW SSOP – DB –40°C to 85°C ORDERABLE PART NUMBER Tube of 50 SSOP – DB 0°C to 70°C (1) (2) TSSOP – PW TRS3238EC RS38EC TRS3238EI RS38EI Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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. Submit Documentation Feedback TRS3238E 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD (HBM) PROTECTION www.ti.com SLLS797 – JUNE 2007 FUNCTION TABLES abc Each Driver (1) INPUTS DIN (1) FORCEON FORCEOFF TIME ELAPSED SINCE LAST RIN OR DIN TRANSITION 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 plus disabled L L H 30 s Z Normal operation with auto-powerdown plus enabled Powered off by auto-powerdown plus feature H = high level, L = low level, X = irrelevant, Z = high impedance Each Receiver (1) INPUTS OUTPUTS RIN1 RIN2–RIN3 FORCEOFF TIME ELAPSED SINCE LAST RIN OR DIN TRANSITION ROUT1B ROUT2 AND ROUT3 RECEIVER STATUS Powered off while ROUT1B is active L X L X L Z H X L X H Z L L H