MAX To 5.5V Powered, Dual RS-232 Drivers/Receivers

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1 MAX To 5.5V Powered, Dual RS-232 Drivers/Receivers DESCRIPTION The MAX3-232 is a dual RS-232 driver/receiver interface circuit that meets all ElA RS-232C and V.2 specifications. It requires a single 3V to 5.5V power supply, and features two onboard charge pump voltage converters. The drivers feature true TT/CMOS input compatibility, slew-rate-limited output, and 300Ω power-off source impedance. The receivers also have hysteresis to improve noise rejection and ±2-kV ESD protection. FEATURES Meet or Exceed TIA/EIA-232-F and ITU Recommendation V.2 Operate With Single 3V to 5.5V Power Supply Operate Up to 20 kbit/s Two Drivers and Two Receivers 30-V Input evels ow Input Current....0 µa Typical Designed to be Interchangeable With Maxim and TI MAX3232, IC3232, SP3232 ESD Protection Exceeds JESD 22 - C 2000-V uman-body Model (A4-A) APPICATIONS Any System Requiring RS-232 Communications Port - Battery Powered Systems, PDAs, Notebooks, aptops, Palmtop PCs, and and-eld Equipment - Modems, Printers and other Peripherals - Digital Cameras - Cellular/Mobile Phones ORDERING INFORMATION PART NO. Temp. Range ( C) Package MAX3-232CPE 0 to 70 6 Pin DIP MAX3-232CSE 0 to 70 6 Pin Narrow SO MAX3-232EPE -40 to 5 6 Pin DIP MAX3-232ESE -40 to 5 6 Pin Narrow SO PINOUT MAX3-232 (DIP, SOIC) (TOP VIEW) C+ V + C C2+ C2 V DOUT2 RIN V CC GND DOUT RIN ROUT DIN DIN2 ROUT2

2 PIN DESCRIPTIONS Pin No. PIN NAME DESCRIPTION 0 C+ External capacitor + for internal voltage doubler. 02 V+ Internally generated +5.5V (typical) supply. 03 C- External capacitor - for internal voltage doubler. 04 C2+ External capacitor + internal voltage inverter. 05 C2- External capacitor - internal voltage inverter. 06 V- Internally generated -5.5V (typical) supply. 07 D OUT2 RS-232 Driver 2 output 5.5V(typical). 0 R IN2 RS-232 Receiver 2 input, with internal 5K pulldown resistor to GND. 0 R OUT2 Receiver 2 TT/CMOS output. 0 D IN2 Driver 2 TT/CMOS input. D IN Driver TT/CMOS input. 2 R OUT Receiver TT/CMOS output. 3 R IN RS-232 Receiver input, with internal 5K pulldown resistor to GND. 4 D OUT RS-232 Driver output 5.5V(typical). 5 GND Supply Ground. 6 V CC Positive Power Supply 3V to +5.5V Function Tables EAC DRIVER INPUT DIN OUTPUT DOUT = high level, = low level EAC RECEIVER INPUT RIN Open OUTPUT ROUT = high level, = low level, Open = input disconnected or connected driver off ogic diagram (positive logic) DIN 4 DOUT DIN2 0 7 DOUT2 ROUT 2 3 RIN ROUT2 RIN2 2

3 Absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage range, V CC (see Note ) to 6 V Positive output supply voltage range, V V CC 0. to 4 V Negative output supply voltage range, V to 4 V Input voltage range, V I : Driver to V CC + 0. Receiver ±30 V voltage range, V O : Driver V S 0. to V S Receivers to V CC + 0. Short-circuit duration: TOUT, T2OUT Unlimited Package thermal impedance, θ JA (see Note 2): SO package C/W DIP package C/W SO W package C/W ead temperature,6 mm (/6 inch) from case for 0 seconds C Storage temperature range, T stg C to 50 C Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings 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. NOTE : All voltage values. are with respect to network ground terminal. 2: The package thermal impedance is measured with the component mounted on an evaluation PC board in free air. Recommended operating conditions MIN NOM MAX UNIT VCC Supply voltage V VI Driver high-level input voltage (DIN) 2 V VI Driver low-level input voltage (DIN) 0. V RIN Receiver input voltage ±30 V TA Operating free-air temperature MAX3-232C 0 70 MAX3-232E 40 5 C Electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Note 3 and Figure 4) ICC Supply current PARAMETER TEST CONDITIONS MIN TYP MAX UNIT All typical values are at VCC = 3. and TA = 25 C. NOTE 3: Test conditions are C C4 = 0. µf at VCC = 3. ± 0.. VCC = 3.3 or 5V, TA = 25 C All outputs open, 0 ma 3

4 DRIVER SECTION Electrical characteristics over recommended ranges of supply voltage and operating free-air temperature range (see Note 3) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VO igh-level output voltage DOUT R = 3 kω to GND 3.5 V VO ow-level output voltage DOUT R = 3 kω to GND 3.5 V Ro resistance DOUT, DOUT2 V+ = V = 0, VO = ±2 V 300 Ω IOS Short-circuit output current DOUT, DOUT2 VCC = 3., VO = 0 ±0 ma IIS Short-circuit input current DIN, DIN2 VI = µa All typical values are at VCC = 3., TA = 25 C. The algebraic convention, in which the least positive (most negative) value is designated minimum, is used in this data sheet for logic voltage levels only. Not more than one output should be shorted at a time. NOTE 3: Test conditions are C C4 = 0. µf at VCC = 3. ± 0.. Switching characteristics, V CC = 3., T A = 25 C (see Note 3) SR Driver slew rate PARAMETER TEST CONDITIONS MIN TYP MAX UNIT R = 3 kω to 7 kω, See Figure 2 30 V/µs SR(t) Driver transition region slew rate See Figure 3 /µs Data rate One DOUT switching 20 kbit/s NOTE 3: Test conditions are C C4 = 0. µf at VCC = 3. ± 0.. RECEIVER SECTION Electrical characteristics over recommended ranges of supply voltage and operating free-air temperature range (see Note 3) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VO igh-level output voltage ROUT IO = ma 2.4 V VO ow-level output voltage ROUT IO = 3.2 ma 0. VIT+ Receiver positive-going input threshold voltage RIN VCC = 3., TA = 25 C V VIT Receiver negative-going input threshold voltage RIN VCC = 3., TA = 25 C V Vhys Input hysteresis voltage RIN VCC = V RI Receiver input resistance RIN VCC = 3.3V, TA = 25 C kω All typical values are at VCC = 3., TA = 25 C. The algebraic convention, in which the least positive (most negative) value is designated minimum, is used in this data sheet for logic voltage levels only. NOTE 3: Test conditions are C C4 = 0. µf at VCC = 3. ± 0.. Switching characteristics, V CC = 3., T A = 25 C (see Note 3 and Figure ) PARAMETER TYP UNIT tp(r) Receiver propagation delay time, low- to high-level output 500 ns tp(r) Receiver propagation delay time, high- to low-level output 500 ns NOTE 3: Test conditions are C C4 = 0. µf at VCC = 3. ± 0.5 V. 4

5 PARAMETER MEASUREMENT INFORMATION Generator (see Note B) 50 Ω R RS-232 C (see Note A) Input tt.5 V.5 V tt 0 V VO VO TEST CIRCUIT SR(tr) 6V t or t T T VOTAGE WAVEFORMS NOTES: A. C includes probe and jig capacitance. B. The pulse generator has the following characteristics: PRR = 20 kbit/s, ZO = 50 Ω, 50% duty cycle Figure. Driver Slew Rate Generator (see Note B) 50 Ω R RS-232 C (see Note A) Input tp.5 V.5 V 0 V tp VO 50% 50% VO TEST CIRCUIT VOTAGE WAVEFORMS NOTES: A. C includes probe and jig capacitance. B. The pulse generator has the following characteristics: PRR = 20 kbit/s, ZO = 50 Ω, 50% duty cycle Figure 2. Driver Pulse Skew Generator (see Note B) 50 Ω TEST CIRCUIT C (see Note A) Input tp NOTES: A. C includes probe and jig capacitance. B. The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle.5 V Figure 3. Receiver Propagation Delay Times 50%.5 V VOTAGE WAVEFORMS tp 50% VO VO 5

6 APPICATION INFORMATION + C + C3 2 3 C+ V+ C VCC GND CBYPASS = 0.µF DOUT + C2 4 5 C2+ C2 5 kω 3 2 RIN ROUT C4 + 6 V DIN DOUT2 7 0 DIN2 RIN2 ROUT2 5 kω C3 can be connected to VCC or GND. NOTES: A. Resistor values shown are nominal. B. Nonpolarized ceramic capacitors are acceptable. If polarized tantalum or electrolytic capacitors are used, they should be connected as shown. Figure 4. Typical Operating Circuit and Capacitor Values VCC vs CAPACITOR VAUES VCC C C2, C3, C4 3. ± 0. 5 V ± 0.5 V to 5.5 V 0. µf µf 0. µf 0. µf 0.33 µf 0.47 µf OUTINE DIMENSIONS Dimensions shown in inches and (mm). PIN 0.20 (5.33) MAX 0.60 (4.06) 0.5 (2.3) 6-ead Plastic DIP (0.55) 0.04 (0.356) 0.40 (2.34) (.2) (.77) (2.54) (.5) BSC 0.20 (7.) (6.0) (.52) 0.05 (0.3) 0.30 (3.30) MIN SEATING PANE (.25) (7.62) 0.05 (0.3) 0.00 (0.204) 0.5 (4.5) 0.5 (2.3) (4.00) 0.47 (3.0) PIN 6-ead Narrow SOIC (0.25) (0.0) (0.00) 0.35 (.0) (.27) BSC 0.02 (0.4) 0.03 (0.35) (6.20) (5.0) 0.06 (.75) (.35) SEATING PANE 0.00 (0.25) (0.) (0.50) (0.25) (.27) (0.4) 6