ST3222E ± 15KV ESD-protected, 3 to 5.5V Low power, up to 250KBps, RS-232 drivers and receivers General features ■ ESD protection for RS-232 I/O pins ± 15KV human body model, ± 8KV IEC 1000-4-2 contact discharge ■ 300µA supply current ■ 250KBps minimum guarantee data rate ■ 6V/µs minimum guarantee slew rate ■ Meet EIA/TIA-232 specification down to 3V ■ Available in SO-18, SSOP20 and TSSOP20 SOP SSOP TSSOP Description allowing external devices such as modems to be monitored using only 1mA supply current. The device is guaranteed to run at data rates of 250Kbps while maintaining RS-232 output levels. Typical applications are Notebook, Sub-notebook and Palmtop Computers, Battery Powered Equipment, Hand-Held Equipment, Peripherals and Printers. The ST3222E is a 3V powered EIA/TIA-232 and V.28/V.24 communications interface with low power requirements, high data-rate capabilities and enhanced electrostatic discharge (ESD) protection to ±8kV using IEC1000-4-2 Contact Discharge and ±15kV using the Human Body Model. ST3222E has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5V supplies with a dual charge pump. The charge pump requires only four small 0.1mF external capacitors for operation form 3V supply. The device has two receivers and two drivers. The ST3222E features a 1mA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers can remain active in shutdown mode, Order code Part number Temperature range Package Comments ST3222ECDR 0 to 70 °C SO-18 (Tape & Reel) 1000 parts per reel ST3222ECPR 0 to 70 °C SSOP20 (Tape & Reel) 1350 parts per reel ST3222EBPR -40 to 85 °C SSOP20 (Tape & Reel) 1350 parts per reel ST3222ECTR 0 to 70 °C TSSOP20 (Tape & Reel) 2500 parts per reel ST3222EBTR -40 to 85 °C TSSOP20 (Tape & Reel) 2500 parts per reel March 2006 Rev 6 1/ www.st.com 18 Contents ST3222E Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.1 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2/18 ST3222E Pin configuration 1 Pin configuration Figure 1. Pin connection SO-18 Table 1. SSOP20/TSSOP20 Pin description Pin n° SO-18 Pin n° SSOP/TSSOP20 Symbol Name and function 1 1 EN Receiver enable control. drive low for normal operation. Drive high to force the receivers outputs (R_OUT) into a high-impedance state. 2 2 C 1+ Positive terminal for the first charge pump capacitor 3 3 V+ 5.5V Generated by the charge pump. 4 4 C1- Negative terminal for the first charge pump capacitor 5 5 C 2+ Positive terminal for the second charge pump capacitor 6 6 C2- Negative terminal for the second charge pump capacitor 7 7 V- -5.5V Generated by the charge pump. 8 8 T2OUT 9 9 R2IN 10 10 R2OUT 11 NC Not connected 11 12 T2IN Second transmitter input voltage 12 13 T1IN First transmitter input voltage 14 NC Not connected 13 15 R1OUT 14 16 R1IN 15 17 T1OUT Second transmitter output voltage Second receiver input voltage Second receiver output voltage First receiver output voltage First receiver input voltage First transmitter output voltage 3/18 Pin configuration Table 1. ST3222E Pin description Pin n° SO-18 Pin n° SSOP/TSSOP20 Symbol 16 18 GND Ground 17 19 VCC Supply voltage 18 20 SHDN 4/18 Name and function Active low shutdown control input. drive low to shut-down transmitter and charge pump ST3222E Absolute maximum ratings 2 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit -0.3 to 6 V VCC Supply voltage V+ Doubled voltage terminal (V CC - 0.3) to 7 V V- Inverted voltage terminal 0.3 to -7 V 13 V V+ +|V-| TIN Transmitter input voltage range -0.3 to 6 V SHDN Transmitter input voltage range -0.3 to 6 V ± 25 V ± 13.2 V -0.3 to (VCC + 0.3) V RIN Receiver input voltage range TOUT Transmitter output voltage range ROUT Receiver output voltage range tSHORT Transmitter output short to GND time Continuous Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. V+ and V- can have a maximum magnitude of +7V, but their absolute addition can not exceed 13 V. Table 3. Shutdown and enable control truth table Table 4. Symbol SHDN EN T-OUT R-OUT 0 0 High Z Active 0 1 High Z High Z 1 0 Active Active 1 1 Active High Z ESD performance: transmitter outputs, receiver inputs Parameter Test Conditions Min. Typ. Max. Unit ESD ESD protection voltage Human body model ±15 kV ESD ESD protection voltage IEC-1000-4-2 ±8 kV 5/18 Electrical characteristics ST3222E 3 Electrical characteristics Table 5. Electrical characteristics (C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol ISUPPLY ISHDN Table 6. Symbol Parameter Typ. Max. Unit SHDN=VCCTA = 25°C 0.3 1 mA Shutdown supply current SHDN=VCCTA = 25°C 1 10 µA No load Logic input electrical characteristics (C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Parameter Input logic threshold low VIH Input logic threshold high IIL Min. VCC power supply current No load VIL VHYS Test conditions Test conditions Min. T-IN, EN, SHDN (Note 1) VCC = 3.3V VCC = 5V Max. Unit 0.8 V 2 V 2.4 Transmitter input hysteresis Input leakage current Typ. 0.25 ± 0.01 T-IN, EN, SHDN V ±1 µA Note: Note 1: Transmitter input hysteresis is typically 250mV Table 7. Transmitter electrical characteristics (C 1 - C4 = 0.1µF VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter Test Conditions Min. Typ. Max. Unit VTOUT Output voltage swing All transmitter outputs are loaded with 3KΩ to GND ±5 ± 5.4 V RTOUT Transmitter output resistance VCC = V+ = V- = 0VVOUT = ± 2V 300 10M Ω ITSC Output short circuit current ± 60 mA ITOL Output leakage current 6/18 VCC = 0V or 3V to 3.6V VOUT = ± 12V Transmitters disable ± 25 µA ST3222E Table 8. Symbol Electrical characteristics Receiver electrical characteristics (C1 - C4 = 0.1µF VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Parameter IOL Output leakage current VRIN Receiver input voltage operating range VRIL Input threshold low VRIH Input threshold high Test Conditions R-OUT, EN = VCC , receiver disabled Unit ± 0.05 ± 10 µA 25 V 0.6 1.2 TA = 25°CVCC = 5V 0.8 1.5 V TA = 25°CVCC = 3.3V 1.5 2.4 TA = 25°CVCC = 5V 1.8 2.4 RRIN Input resistance TA = 25°C VROL Output voltage low IOUT = 1.6mA VROH Output voltage high IOUT = -1mA DR Max. TA = 25°CVCC = 3.3V Input hysteresis Symbol Typ. -25 VRIHYS Table 9. Min. V 0.5 3 VCC -0.6 5 V 7 KΩ 0.4 V VCC0.1 V Timing characteristics (C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Parameter Data transfer rate Test conditions RL = 3KΩCL2= 1000pF one transmitter switching Min. Typ. Max. 250 Unit Kbps tPHLR tPLHR Propagation delay input to RXIN to RXOUTCL = 150pF output 0.15 µs |tPHLT - tTHL| Transmitter propagation delay difference (1) 200 ns tOER Receiver output enable time Normal operation 50 ns tODR Receiver output disable time Normal operation 50 ns 50 ns |tPHLR - tTHR| SRT Receiver Propagation Delay Difference Transition Slew Rate TA = 25°C RL = 3KΩ to 7KΩ VCC = 3.3V measured from +3V to -3V or -3V to +3V CL = 150pF to 1000pF CL = 150pF to 2500pF 6 4 30 30 V/µs V/µs 1. Transmitter Skew is measured at the transmitter zero cross points 7/18 Application circuits ST3222E 4 Application circuits Figure 2. Application schematic Table 10. Capacitance value (µF) 8/18 VCC C1 C2 C3 C4 Cbypass 3.0 to 3.6 0.1 0.1 0.1 0.1 0.1 4.5 to 5.5 0.047 0.33 0.33 0.33 0.1 3.0 to 5.5 0.1 0.47 0.47 0.47 0.1 ST3222E 4.1 Application circuits Typical performance characteristics (unless otherwise specified Tj = 25°C) Figure 3. Output current vs output high voltage Figure 4. Output current vs output high voltage Figure 5. Output current vs output low voltage Figure 6. Output current vs output low voltage Figure 7. Voltage transfer characteristics for Figure 8. transmitter inputs Receiver Input Resistance 9/18 Package mechanical data 5 ST3222E Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com 10/18 ST3222E Package mechanical data SO-18 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.35 2.65 0.092 0.104 A1 0.1 0.3 0.004 0.012 A2 2.55 0.100 B 0.33 0.51 0.013 0.020 C 0.23 0.32 0.009 0.012 D 11.35 11.75 0.447 0.462 E 7.4 7.6 0.291 0.299 e 1.27 0.050 H 10.00 10.65 0.393 0.419 h 0.25 0.75 0.010 0.029 0.016 0.050 k 8 L ˚ (max.) 0.4 1.27 B A A2 h x 45û K e A1 L 0.10mm C H .004 Seating Plane D 10 E 18 1 9 SO18 0070768 11/18 Package mechanical data ST3222E SSOP20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. MAX. 2 A1 0.05 A2 1.65 b 0.079 0.002 1.75 1.85 0.065 0.22 0.38 0.009 0.015 c 0.09 0.25 0.004 0.010 D 6.9 7.2 7.5 0.272 0.283 0.295 E 7.4 7.8 8.2 0.291 0.307 0.323 E1 5 5.3 5.6 0.197 0.209 0.220 e 0.069 0.65 BSC 0.073 0.0256 BSC K 0˚ 4˚ 8˚ 0˚ 4˚ 8˚ L 0.55 0.75 0.95 0.022 0.030 0.037 A A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 0061436C 12/18 ST3222E Package mechanical data TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 D 6.4 6.5 6.6 0.252 0.256 0.260 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 1 e 0.65 BSC K 0˚ L 0.45 A 0.0256 BSC 0.60 8˚ 0˚ 0.75 0.018 8˚ 0.024 0.030 A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 0087225C 13/18 Package mechanical data ST3222E Tape & Reel SO-18 MECHANICAL DATA mm. inch DIM. MIN. A MAX. MIN. 330 13.2 TYP. MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 14/18 TYP 0.504 22.4 0.519 0.882 Ao 10.8 11.0 0.425 0.433 Bo 11.9 12.1 0.468 0.476 Ko 2.9 3.1 0.114 0.122 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 ST3222E Package mechanical data Tape & Reel SSOP20 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 8.4 8.6 0.331 0.339 Bo 7.7 7.9 0.303 0.311 Ko 2.9 3.1 0.114 0.122 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 15/18 Package mechanical data ST3222E Tape & Reel TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. A MAX. MIN. 330 13.2 TYP. MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 16/18 TYP 0.504 22.4 0.519 0.882 Ao 6.8 7 0.268 0.276 Bo 6.9 7.1 0.272 0.280 Ko 1.7 1.9 0.067 0.075 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 ST3222E Revision history 6 Revision history Table 11. Revision history Date Revision 22-Mar-2006 6 Changes Order codes has been updated and new template. 17/18 ST3222E Please Read Carefully: Information in this document is provided solely in connection with ST products. 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