ST3222 3 TO 3.6V, LOW POWER, UP TO 400KBPS, RS-232 DRIVERS AND RECEIVERS ■ ■ ■ ■ ■ 300µA SUPPLY CURRENT 250Kbps MINIMUM GUARENTEED DATA RATE 6V/µs MINIMUM GUARANTEED SLEW RATE MEET EIA/TIA-232 SPECIFICATIONS DOWN TO 3V AVAILABLE IN SO-18 AND TSSOP20 DESCRIPTION The ST3222 is a 3V powered EIA/TIA-232 and V.28/V.24 communications interface with low power requirements and high data-rate capabilities. ST3222 has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 3.6V power supplies. The device requires only four small 0.1µF standard external capacitors for operating from 3V supply. The ST3222 has two receivers and two drivers. The ST3222 features a 1µA 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 1µA supply current. The device is guaranteed to run at data rates of 250Kbps while maintaining RS-232 output levels. SOP TSSOP Typical applications are Notebook, Subnotebook and Palmtop Computers, Battery Powered Equipment, Hand-Held Equipment, Peripherals and Printers. ORDERING CODES Type Temperature Range Package Comments ST3222CD ST3222BD ST3222CDR ST3222BDR ST3222CTR ST3222BTR 0 to 70 °C -40 to 85 °C 0 to 70 °C -40 to 85 °C 0 to 70 °C -40 to 85 °C SO-18 (Tube) SO-18 (Tube) SO-18 (Tape & Reel) SO-18 (Tape & Reel) TSSOP20 (Tape & Reel) TSSOP20 (Tape & Reel) 50parts per tube / 20tube per box 50parts per tube / 20tube per box 1000 parts per reel 1000 parts per reel 2500 parts per reel 2500 parts per reel October 2002 1/9 ST3222 PIN CONFIGURATION SO-18 TSSOP20 PIN DESCRIPTION 2/9 PlN N° (SO-18) PlN N° (TSSP20) SYMBOL NAME AND FUNCTION 1 1 EN 2 2 C1+ 3 3 V+ 4 4 C1- 5 5 C2+ 6 6 C2- 7 7 8 8 VT2OUT Receiver Enable Control. Drive low for normal operation. Drive high to force the receivers outputs (R_OUT) into a high-impedance state. Positive Terminal for the first Charge Pump Capacitor 5.5V Generated By The Charge Pump. Negative Terminal for the first Charge Pump Capacitor Positive Terminal for the second Charge Pump Capacitor Negative Terminal for the second Charge Pump Capacitor -5.5V Generated By The Charge Pump. Second Transmitter Output Voltage 9 9 R2IN 10 10 R2OUT Second Receiver Output Voltage 11 Not Connected Second Transmitter Input Voltage Second Receiver Input Voltage 11 12 NC T2IN 12 13 T1IN First Transmitter Input Voltage 14 Not Connected First Receiver Output Voltage 13 15 NC R1OUT 14 16 R1IN 15 17 T1OUT 16 18 17 19 GND VCC 18 20 SHDN First Receiver Input Voltage First Transmitter Output Voltage Ground Supply Voltage Active Low Shutdown Control Input. Drive Low To Shut-down Trnasmittes And Charge Pump ST3222 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCC Supply Voltage -0.3 to 6 V V+ Doubled Voltage Terminal (VCC - 0.3) to 7 V VV+ +|V-| TIN Inverted Voltage Terminal 0.3 to -7 13 V V Transmitter Input Voltage Range -0.3 to 6 V SHDN RIN Transmitter Input Voltage Range Receiver Input Voltage Range -0.3 to 6 V TOUT Transmitter Output Voltage Range ROUT Receiver Output Voltage Range tSHORT ± 25 V ± 13.2 V -0.3 to (VCC + 0.3) V 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. V+ and V- can have a maximum magnitude of +7V, but their absolute addition can not exceed 13 V. ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1µF, VCC = 3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter ISUPPLY VCC Power Supply Current Test Conditions No Load VCC = 3.3V Typ. Max. Unit TA = 25°C Min. 0.3 1 mA TA = 25°C 1 10 µA Typ. Max. Unit 0.8 V SHDN=VCC ISHDN SHUTDOWN Supply Current No Load VCC = 3.3V SHDN=VCC LOGIC INPUT ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1µF, VCC = 3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter Test Conditions VIL Input Logic Threshold Low T-IN, EN, SHDN (Note 1) VIH Input Logic Threshold High VCC = 3.3V VHYS IIL Transmitter Input Histeresys Input Leakage Current Min. 2 V 0.5 V ± 0.01 ±1 µA Min. Typ. Max. Unit ±5 ± 5.4 V 300 10M Ω T-IN, EN, SHDN Note 1: Transmitter input hysteresis is typically 250mV TRANSMITTER ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1µF VCC = 3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter VTOUT Output Voltage Swing RTOUT ITSC Transmitter Output Resistance Output Short Circuit Current ITOL Output Leakage Current Test Conditions All Transmitter outputs are loaded with 3KΩ to GND VCC = V+ = V- = 0V VOUT = ± 2V VCC = 0V or 3V to 3.6V Transmitters Disable VOUT = ± 12V ± 60 mA ± 25 µA 3/9 ST3222 RECEIVER ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1µF VCC = 3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol IOL Parameter Output Leakage Current Test Conditions R-OUT, EN = VCC, Receiver Disabled VRIL Receiver Input Voltage Operating Range Input Threshold Low TA = 25°C VCC = 3.3V VRIH Input Threshold High TA = 25°C VCC = 3.3V VRIN Min. Max. Unit ± 0.05 ± 10 µA 25 V -25 0.6 1.2 1.5 VRIHYS Input Hysteresis V 2.4 0.5 RRIN Input Resistance TA = 25°C VROL TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High IOUT = 1.6mA VROH Typ. 3 IOUT = -1mA 5 V V 7 KΩ 0.4 V VCC-0.6 VCC-0.1 V TIMING CHARACTERISTICS (C1 - C4 = 0.1µF, VCC = 3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol DR Parameter Data Transfer Rate tPHLR tPLHR Propagation Delay Input to Output |tPHLT - tTHL| Transmitter Propagation Delay Difference tOER tODR |tPHLR - tTHR| SRT Test Conditions RL = 3KΩ CL2= 1000pF one trasmitter switching RXIN to RXOUT CL = 150pF Typ. 240 400 Kbps 0.2 µs 100 ns 200 ns 200 ns 50 ns (Note 1) Receiver Output Enable Normal Operation Time Receiver Output Disable Normal Operation Time Receiver Propagation Delay Difference Trnasition 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 Transmitter Skew is measured at the transmitter zero cross points 4/9 Min. 6 4 Max. 30 30 Unit V/µs V/µs ST3222 APPLICATION CIRCUITS CAPACITANCE VALUE (µF) C1 C2. C3 C4 Cbypass 0.1 0.1 0.1 0.1 0.1 5/9 ST3222 TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified Tj = 25°C) Figure 1 : Driver Voltage Transfer Characteristics for Trasmitter Inputs Figure 3 : Output Current vs Output Low Voltage Figure 2 : Driver Voltage Transfer Characteristics for Receiver Inputs Figure 4 : Output Current vs Output High Voltage 6/9 ST3222 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 7/9 ST3222 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 8/9 ST3222 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. © The ST logo is a registered trademark of STMicroelectronics © 2002 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. © http://www.st.com 9/9