TRSF3238ECDW

www.ti.com TRSF3238E 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD (HBM) PROTECTION SLLS826 – AUGUST 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 1000 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 Accept 5-V Logic Input With 3.3-V Supply Always-Active Noninverting Receiver Output (ROUT1B) 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 C2− V− DOUT1 DOUT2 DOUT3 RIN1 RIN2 DOUT4 RIN3 DOUT5 FORCEON FORCEOFF Battery-Powered Systems PDAs Notebooks Subnotebooks Laptops Palmtop PCs Hand-Held Equipment Modems Printers 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 INVALID RHB PACKAGE (TOP VIEW) APPLICATIONS • • • • • • • • • 1 V− C2– GND C2+ C1+ V+ VCC NC • 32 31 30 29 28 27 26 25 DOUT1 DOUT2 DOUT3 RIN1 RIN2 DOUT4 RIN3 NC 1 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 C1– DIN1 DIN2 DIN3 ROUT1 ROUT2 DIN4 ROUT3 DOUT5 FORCEON FORCEOFF INVALID NC ROUT1B DIN5 NC 9 10 11 12 13 14 15 16 DESCRIPTION/ORDERING INFORMATION The TRSF3238E 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. The TRSF3238E operates at data signaling rates up to 1000 kbit/s. 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 TRSF3238E 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD (HBM) PROTECTION www.ti.com SLLS826 – AUGUST 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 PACKAGE (1) (2) TA QFN – RHB SOIC – DW 0°C to 70°C SSOP – DB TSSOP – PW QFN – RHB SOIC – DW –40°C to 85°C SSOP – DB TSSOP – PW (1) (2) 2 ORDERABLE PART NUMBER Reel of 2000 TRSF3238ECRHBR Tube of 50 TRSF3238ECDW Reel of 2000 TRSF3238ECDWR Tube of 50 TRSF3238ECDB Reel of 2000 TRSF3238ECDBR Tube of 50 TRSF3238ECPW Reel of 2000 TRSF3238ECPWR Reel of 2000 TRSF3238EIRHBR Tube of 50 TRSF3238EIDW Reel of 2000 TRSF3238EIDWR Tube of 50 TRSF3238EIDB Reel of 2000 TRSF3238EIDBR Tube of 50 TRSF3238EIPW Reel of 2000 TRSF3238EIPWR TOP-SIDE MARKING RS38EC TRS3238EC TRS3238EC RS38EC RS38EI TRS3238EI TRS3238EI RS38EI Package drawings, thermal data, and symbolization are available at www.ti.com/packaging. 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 TRSF3238E 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD (HBM) PROTECTION www.ti.com SLLS826 – AUGUST 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 AND 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