ST3222EBTR

ST3222EB ST3222EC ± 15 kV ESD protected, 3 to 5.5 V low power, up to 250 Kbps, RS-232 drivers and receivers Features ■ ESD protection for RS-232 I/O pins ± 15 kV human body model, ± 8 kV IEC 1000-4-2 contact discharge ■ 300 µA supply current ■ 250KBps minimum guarantee data rate ■ 6 V/µs minimum guarantee slew rate ■ Meet EIA/TIA-232 specification down to 3 V ■ Available in SSOP20 and TSSOP20 TSSOP Description Typical applications are Notebook, Sub-notebook and Palmtop Computers, Battery Powered Equipment, Hand-Held Equipment, Peripherals and Printers. The ST3222E is a 3 V 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 ± 8 kV using IEC1000-4-2 Contact Discharge and ±15 kV using the Human Body Model. ST3222E has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5 V supplies with a dual charge pump. The charge pump requires only four small 0.1 mF external capacitors for operation form 3 V supply. The device has two receivers and two drivers. The ST3222E features a 1 mA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers can remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1 mA supply current. The device is guaranteed to run at data rates of 250 Kbps while maintaining RS-232 output levels. Table 1. SSOP Device summary Order codes Temperature range Package Packaging ST3222ECPR 0 to 70 °C SSOP20 (tape and reel) 1350 parts per reel ST3222EBPR -40 to 85 °C SSOP20 (tape and reel) 1350 parts per reel ST3222ECTR 0 to 70 °C TSSOP20 (tape and reel) 2500 parts per reel ST3222EBTR -40 to 85 °C TSSOP20 (tape and reel) 2500 parts per reel January 2008 Rev 8 1/15 www.st.com 15 Contents ST3222E Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2/15 ST3222E Pin configuration 1 Pin configuration Figure 1. Pin connection Table 2. Pin description Pin n° Symbol Name and function 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 C1+ Positive terminal for the first charge pump capacitor 3 V+ 5.5V Generated by the charge pump. 4 C1- Negative terminal for the first charge pump capacitor 5 C2+ Positive terminal for the second charge pump capacitor 6 C2- Negative terminal for the second charge pump capacitor 7 V- -5.5V Generated by the charge pump. 8 T2OUT 9 R2IN 10 R2OUT 11 NC Not connected 12 T2IN Second transmitter input voltage 13 T1IN First transmitter input voltage 14 NC Not connected 15 R1OUT 16 R1IN 17 T1OUT 18 GND Ground 19 VCC Supply voltage 20 SHDN Second transmitter output voltage Second receiver input voltage Second receiver output voltage First receiver output voltage First receiver input voltage First transmitter output voltage Active low shutdown control input. drive low to shut-down transmitter and charge pump 3/15 Absolute maximum ratings ST3222E 2 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol Parameter Value Unit -0.3 to 6 V VCC Supply voltage V+ Doubled voltage terminal (VCC - 0.3) to 7 V V- Inverted voltage terminal 0.3 to -7 V 13 V -0.3 to 6 V ± 25 V ± 13.2 V -0.3 to (VCC + 0.3) V V+ +|V-| TIN Transmitter input voltage range RIN Receiver input voltage range TOUT Transmitter output voltage range ROUT Receiver output voltage range tSHORT Note: Transmitter output short to gnd time Continuous Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Externally applied V+ and V- can have a maximum magnitude of +7 V, but their absolute addition can not exceed 13 V. Running on internal charge pump, intrinsic self limitation allows exceeding those values without any damage. Startup voltage sequence (VCC, then V+, then V-) is critical, therefore it is not recommended to use this device using externally applied voltage to V+ and V-. Table 4. Table 5. Symbol Shutdown and enable control truth table 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 4/15 ST3222E Electrical characteristics 3 Electrical characteristics Table 6. Electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol ISUPPLY Parameter Table 7. No load, SHDN = VCC, TA = 25°C Typ. Max. Unit 0.3 1 mA 1 10 µA Logic input electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter VIL Input logic threshold low VIH Input logic threshold high Test conditions Min. VCC = 3.3 V Input leakage current 1 Table 8. Symbol Max. Unit 0.8 V 2 V 2.4 Transmitter input hysteresis IIL Typ. T-IN, EN, SHDN (Note: 1) VCC = 5 V VHYS Note: Min. VCC power supply current No load, SHDN = VCC, TA = 25°C Shutdown supply current ISHDN Test conditions 0.25 ± 0.01 T-IN, EN, SHDN V ±1 µA Transmitter input hysteresis is typically 250 mV Transmitter electrical characteristics (C1 - C4 = 0.1 µF VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Parameter Test conditions Min. Typ. Max. Unit VTOUT Output voltage swing All transmitter outputs are loaded with 3 KΩ to GND ±5 ± 5.4 V RTOUT Transmitter output resistance VCC = V+ = V- = 0 V, VOUT = ± 2 V 300 10M Ω ITSC Output short circuit current ± 60 mA ITOL Output leakage current VCC = 0 or 3 V to 3.6 V, VOUT = ± 12 V Transmitters disable ± 25 µA 5/15 Electrical characteristics Table 9. Symbol ST3222E Receiver electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, 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°C, VCC = 5 V 0.8 1.5 V TA = 25°C, VCC = 3.3 V 1.5 2.4 TA = 25°C, VCC = 5 V 1.8 2.4 RRIN Input resistance TA = 25°C VROL Output voltage low IOUT = 1.6 mA VROH Output voltage high IOUT = -1 mA DR Max. TA = 25°C, VCC = 3.3 V Input hysteresis Symbol Typ. -25 VRIHYS Table 10. Min. V 0.5 3 VCC-0.6 5 V 7 KΩ 0.4 V VCC0.1 V Timing characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Parameter Data transfer rate Test conditions RL = 3 KΩ, CL2= 1000 pF one transmitter switching Min. Typ. Max. 250 Unit Kbps tPHLR tPLHR Propagation delay input to RXIN to RXOUT, CL = 150 pF 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 = 3 KΩ to 7 KΩ VCC = 3.3 V measured from +3V to -3V or -3V to +3V CL = 150 pF to 1000 pF 6 30 V/µs TA = 25°C RL = 3 KΩ to 7 KΩ VCC = 3.3 V measured from +3V to -3V or -3V to +3V CL = 150 pF to 2500 pF 4 30 V/µs 1. Transmitter Skew is measured at the transmitter zero cross points 6/15 ST3222E Application circuits 4 Application circuits Figure 2. Application schematic Table 11. Capacitance value (µF) 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 0.33 3.0 to 5.5 0.22 0.1 0.1 0.1 0.22 7/15 Typical performance characteristics ST3222E 5 Typical performance characteristics Figure 3. (unless otherwise specified TJ = 25 °C) Output current vs output high Figure 4. voltage Output current vs output high voltage Figure 5. Output current vs output low voltage Output current vs output low voltage Figure 7. Voltage transfer characteristics for Figure 8. transmitter inputs 8/15 Figure 6. Receiver input resistance ST3222E 6 Package mechanical data 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 9/15 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 10/15 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 11/15 Package mechanical data ST3222E Tape & reel SSOP20 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 12/15 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 ST3222E Package mechanical data Tape & reel TSSOP20 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 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 13/15 Revision history ST3222E 7 Revision history Table 12. Document revision history Date Revision 22-Mar-2006 6 Order codes updated. 23-Aug-2007 7 Added Table 1 in cover page. 21-Jan-2008 8 Added note on Table 3. 14/15 Changes ST3222E Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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