MAX3238IDBRG4Q1

    
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  ! SLLS569B − MAY 2003 − REVISED APRIL 2008 D Qualified for Automotive Applications D ESD Protection Exceeds 2000 V Per D D D D D D D D D DB OR PW PACKAGE (TOP VIEW) MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) Meets or Exceeds Requirements of TIA/EIA-232-F and ITU v.28 Standards Operates With 3-V to 5.5-V VCC Supply Operates Up To 250 kbit/s Five Drivers and Three Receivers 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) RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM) C2 + GND C2− V− DOUT1 DOUT2 DOUT3 RIN1 RIN2 DOUT4 RIN3 DOUT5 FORCEON FORCEOFF 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 INVALID description/ordering information The MAX3238 consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM) 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 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. These devices operate at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew rate. ORDERING INFORMATION{ PACKAGE‡ TA −40°C to 85°C ORDERABLE PART NUMBER TOP-SIDE MARKING MAX3238Q SSOP (DB) Tape and reel MAX3238IDBRQ1 TSSOP (PW) Tape and reel MAX3238IPWRQ1 MB3238Q † 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 http://www.ti.com. ‡ Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging. 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. Copyright  2008, Texas Instruments Incorporated   "#$%&'()"%# "* +,&&-#) (* %$ .,/0"+()"%# 1()- &%1,+)* +%#$%&' )% *.-+"$"+()"%#* .-& )2- )-&'* %$ -3(* #*)&,'-#)* *)(#1(&1 4(&&(#)5 &%1,+)"%# .&%+-**"#6 1%-* #%) #-+-**(&"05 "#+0,1)-*)"#6 %$ (00 .(&('-)-&* POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 
    
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  ! SLLS569B − MAY 2003 − REVISED APRIL 2008 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 automatically activates once 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. Function Tables EACH DRIVER INPUTS OUTPUT DOUT DRIVER STATUS X Z Powered off Normal operation with auto-powerdown plus disabled DIN FORCEON FORCEOFF TIME ELAPSED SINCE LAST RIN OR DIN TRANSITION X X L L H H X H H H H X L 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 INPUTS RIN1 RIN2−RIN3 OUTPUTS FORCEOFF TIME ELAPSED SINCE LAST RIN OR DIN TRANSITION ROUT1B ROUT L X L X L Z H X L X H Z L L H