ST3243CPR

ST3243B, ST3243C ±15 kV ESD protected 3 to 5.5 V, 400 kbps, RS-232 transceiver with auto-power-down Datasheet - production data All transmitter outputs and receiver inputs are protected to ±8 kV using IEC61000-4-2 contact discharge and ±15 kV IEC61000-4-2 air discharge. The receiver R2 is always active to implement a wake-up feature for the serial port. SSOP-28 Features • ESD protection for RS-232 I/O pins – ±8 kV IEC61000-4-2 contact discharge – ±15 kV IEC61000-4-2 air discharge • 1 μA supply current achieved when in autopower-down • 250 kbps minimum guaranteed data rate • Guaranteed 6 V/μs slew rate range • Guaranteed mouse drive ability • 0.1 μF external capacitors • Meet EIA/TIA-232 specifications down to 3 V • Available in SSOP-28 package Description The ST3243B/ST3243C devices consist of 3 drivers, 5 receivers and a dual charge pump circuit. The devices meet the requirements of EIA/TIA and V.28/V.24 communication standards providing high data rate capability and enhanced electrostatic discharge (ESD) protection. The ST3243B/ST3243C devices have a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a 3.0 V to 5.5 V supply with a dual charge pump. The devices are guaranteed to run at data rates of 250 kbps while maintaining RS-232 output levels. The auto-power-down feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is set low, both drivers and receivers (expert R2B) are shut off, and supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drives causes the auto-power-down condition to occur. Auto-power-down can be disabled when FORCEON and FORCEOFF are high, and should be done when driving a serial mouse. With autopower-down enabled, the device is activated automatically when a valid signal is applied to any receiver input. Typical application are in notebook, subnotebook, palmtop computers, battery-powered equipment, hand-held equipment, peripherals, and printers. Table 1. Device summary Order code Temperature range Package Packaging ST3243CPR 0 to 70 °C SSOP-28 (tape and reel) 1350 parts per reel Note: For new designs, we recommend the use of the ST3243EB and ST3243EC which have a temperature range of -40 to 85 °C and 0 to 70 °C respectively. October 2014 This is information on a product in full production. DocID7539 Rev 12 1/18 www.st.com Contents ST3243B, ST3243C Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2/18 DocID7539 Rev 12 ST3243B, ST3243C 1 Pin configuration Pin configuration Figure 1. Pin configuration DocID7539 Rev 12 3/18 18 Pin configuration ST3243B, ST3243C Table 2. Pin description 4/18 Pin no Symbol Name and function 1 C2+ Positive terminal of inverting charge pump capacitor 2 C2- Negative terminal of inverting charge pump capacitor 3 V- - 5.5 V generated by the charge pump 4 R1IN First receiver input voltage 5 R2IN Second receiver input voltage 6 R3IN Third receiver input voltage 7 R4IN Fourth receiver input voltage 8 R5IN Fifth receiver input voltage 9 T1OUT First transmitter output voltage 10 T2OUT Second transmitter output voltage 11 T3OUT Third transmitter output voltage 12 T3IN Third transmitter input voltage 13 T2IN Second transmitter input voltage 14 T1IN First transmitter input voltage 15 R5OUT Fifth receiver output voltage 16 R4OUT Fourth receiver output voltage 17 R3OUT Third receiver output voltage 18 R2OUT Second receiver output voltage 19 R1OUT First receiver output voltage 20 R2OUTB Non-inverting complementary receiver output, always active for wakeup 21 INVALID Output of the valid signal detector. Indicates if a valid RS-232 level is present on receiver inputs logic “1” 22 FORCEOFF Drive low to shut down transmitters and on-board power supply. This overrides all automatic circuitry and FORCEON 23 FORCEON Drive high to override automatic circuitry keeping transmitters on (FORCEOFF must be high) 24 C1- 25 GND Ground 26 VCC Supply voltage 27 V+ 5.5 V generated by the charge pump 28 C1+ Positive terminal of voltage charge pump capacitor Negative terminal of voltage charge pump capacitor DocID7539 Rev 12 ST3243B, ST3243C Pin configuration Table 3. Truth table FORCEOFF TOUT ROUT R2OUTB 0 HIGH Z HIGH Z ACTIVE(1) 1 ACTIVE(1) ACTIVE(1) ACTIVE(1) 1. If the part is in auto-power-down mode (FORCEOFF = VCC, FORCEON = GND) it is shutdown, if no valid RS-232 levels are present on all receiver input. DocID7539 Rev 12 5/18 18 Maximum ratings 2 ST3243B, ST3243C Maximum ratings Table 4. Absolute maximum ratings Symbol Parameter Value Unit VCC Supply voltage V+ Doubled voltage terminal (VCC -0.3) to 7 V- Inverted voltage terminal 0.3 to -7 -0.3 to 6 V+ +|V-| 13 FORCEON, Input voltage FORCEOFF, TIN TOUT TSTG Note: ± 13.2 Transmitter output voltage range ROUT ROUTB INVALID tSHORT ± 25 Receiver input voltage range RIN V -0.3 to 6 Receiver output voltage range -0.3 to (VCC + 0.3) Short-circuit duration on TOUT (one at a time) Continuous Storage temperature range -65 to 150 °C 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 +7 V, but their absolute addition can not exceed 13 V. Table 5. ESD performance: transmitter outputs, receiver inputs Symbol 6/18 Parameter Test conditions Min. ESD ESD protection voltage IEC61000-4-2 air discharge ± 15 ESD ESD protection voltage IEC61000-4-2 (contact discharge) ±8 DocID7539 Rev 12 Typ. Max. Unit — — kV ST3243B, ST3243C 3 Electrical characteristics 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. Table 6. Electrical characteristics Symbol IASHDN ISHDN ISUPPLY Parameter Test conditions Supply current auto-power-down VCC = 3.3 or 5.0 V, TA = 25 °C All R_IN open, FORCEOFF = VCC Shutdown supply current VCC = 3.3 or 5.0 V, TA = 25 °C All R_IN open, FORCEOFF = GND Supply current auto-power-down disabled VCC = 3.3 or 5.0 V TA = 25 °C FORCEON = FORCEOFF = VCC no load Min. Typ. Max. 1 10 Unit µA 1 10 0.3 1 mA C1 - C4 = 0.1 µA, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C. Table 7. Logic input electrical characteristics Symbol Parameter Test conditions VTIL Input logic threshold low T-IN, FORCEON, FORCEOFF VTIH Input logic threshold high T-IN, FORCEON, FORCEOFF VCC = 3.3 V VCC = 5 V VTHYS Transmitter input hysteresis Min. Typ. Max. Unit 0.8 V 2 2.4 0.5 IIL Input leakage current T-IN, FORCEON, FORCEOFF ± 0.01 ± 1.0 IOL Output leakage current Receiver disabled ± 0.05 ± 10 VOL Output voltage low IOUT = 1.6 mA VOH Output voltage high IOUT = -1 mA DocID7539 Rev 12 0.4 VCC - 0.6 VCC - 0.1 µA V 7/18 18 Electrical characteristics ST3243B, ST3243C 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. Table 8. Auto-power-down electrical characteristics Symbol Parameter Test conditions Min. Typ. VRITE Receiver input threshold to transmitter enabled Positive threshold Negative threshold 2.7 VRITD Receiver input threshold to transmitter disabled 1 µA supply current -0.3 VIOL INVALID output voltage LOW VIOH INVALID output voltage HIGH tWU Receiver threshold to transmitter enabled IOUT = 1.6 mA 250 tINVH Receiver positive or negative threshold to INVALID HIGH IOUT = -1 mA 1 tINVL Receiver positive or negative threshold to INVALID LOW Max. Unit 2.7 0.3 V 0.4 VCC - 0.6 µs 30 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. Table 9. Transmitter electrical characteristics Symbol 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 ROUT Output resistance VCC = V+ = V- = 0 V, VOUT = ± 2 V 300 10 M Ω ISC VOT 8/18 ± 35 Output short-circuit current Transmitter output voltage T1IN = T2IN = GND, T3IN = VCC T3OUT loaded with 3 kΩ to GND T1OUT and T2OUT loaded with 2.5 mA each DocID7539 Rev 12 ±5 ± 60 mA V ST3243B, ST3243C 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. Table 10. Receiver electrical characteristics Symbol Parameter Test conditions VRIN Receiver input voltage operating range VRIL RS-232 Input threshold low TA = 25 °C, VCC = 3.3 V TA = 25 °C, VCC = 5.0 V RS-232 Input threshold high TA = 25 °C, VCC = 3.3 V TA = 25 °C, VCC = 5.0 V VRIH VRIHYS Input hysteresis RRIN Input resistance Min. Typ. -25 Max. Unit 25 0.6 0.8 1.2 1.2 1.5 1.8 V 2.4 2.4 0.5 TA = 25 °C 3 5 7 kΩ 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. Table 11. Timing characteristics Symbol Parameter Test conditions RL = 3 kΩ, CL= 1000 pF one transmitter switching DR Maximum data rate tPHL tPLH Receiver propagation delay RIN to ROUT, CL = 150 pF Min. Typ. 250 400 kbps 0.15 µs tT_SKEW Transmitter skew 100 tR_SKEW Receiver skew 50 tINVH Receiver positive or negative threshold to INVALID HIGH 1 tINVL Receiver positive or negative threshold to INVALID LOW 30 SRT Transition slew rate Max. Unit ns µs TA = 25 °C, RL = 3 kΩ to 7 kΩ, VCC = 3.3 V measured from +3 V to -3 V or -3 V to +3 V CL = 150 pF to 1000 pF CL = 150 pF to 2500 pF DocID7539 Rev 12 6 4 30 30 V/µs 9/18 18 Application 4 ST3243B, ST3243C Application Figure 2. Application circuit $0 10/18 DocID7539 Rev 12 ST3243B, ST3243C Application Table 12. 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 1.0 1.0 1.0 0.22 DocID7539 Rev 12 11/18 18 Typical performance characteristics 5 ST3243B, ST3243C Typical performance characteristics Unless otherwise specified TJ = 25 °C. 12/18 Figure 3. INVALID HIGH threshold time Figure 4. INVALID LOW threshold time Figure 5. Receiver propagation delay Figure 6. Receiver output enable and disable time DocID7539 Rev 12 ST3243B, ST3243C Typical performance characteristics Figure 7. Output current vs. output high voltage Figure 8. Output current vs. output low voltage DocID7539 Rev 12 13/18 18 Package mechanical data 6 ST3243B, ST3243C Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark. 14/18 DocID7539 Rev 12 ST3243B, ST3243C Package mechanical data Figure 9. SSOP-28 package mechanical drawing Table 13. SSOP-28 package mechanical data Dimensions Symbol mm Min. Typ. A inches Max. Min. Typ. 2 A1 0.050 A2 1.65 b Max. 0.079 0.002 1.85 0.065 0.22 0.38 0.009 0.015 c 0.09 0.25 0.004 0.010 D 9.9 10.2 10.5 0.390 0.402 0.413 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 1.75 0.65 BSC K 0° L 0.55 0.75 0.069 0.073 0.0256 BSC 10° 0° 0.95 0.022 DocID7539 Rev 12 10° 0.030 0.037 15/18 18 Package mechanical data ST3243B, ST3243C Figure 10. SSOP-28 tape and reel mechanical drawing(1) 1. Drawing not in scale. Table 14. SSOP-28 tape and reel mechanical data Dimensions Symbol mm 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. inches 0.504 22.4 0.519 0.882 Ao 8.4 8.6 0.331 0.339 Bo 10.7 10.9 0.421 0.429 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 DocID7539 Rev 12 ST3243B, ST3243C 7 Revision history Revision history Table 15. Document revision history Date Revision 19-Sep-2004 6 Document updating. 31-Mar-2006 7 Order codes updated. 12-Nov-2007 8 Added Table 1. 21-Oct-2009 9 Modified Table 1: Device summary 07-Oct-2011 10 Added ST3243B device, document reformatted, updated/added Figure 9 and Figure 10, Table 13 and Table 14, minor text and typo modifications throughout the document. 11 Updated title, Features, Description and Table 5 (added ESD protection, replaced “Human body model” by “±15 kV IEC61000-4-2 air discharge”, IEC1000-4-2 replaced by IEC61000-4-2). Removed Note 2 below Table 4. Added Table 5. Corrected typ. and max. mm value of E symbol in Table 13. Minor corrections throughout document. 12 Description: Replaced supply current of “1 mA” with “1 µA” Table 1: Device summary: removed obsolete order code ST3243BPR Added Note: on page 1 Minor text updates throughout document 15-Feb-2013 02-Oct-2014 Changes DocID7539 Rev 12 17/18 18 ST3243B, ST3243C IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2014 STMicroelectronics – All rights reserved 18/18 DocID7539 Rev 12