ST75C185 LOW POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS TARGET DATA ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ MEETS STANDARD EIA-232-E SINGLE CHIP WITH INTERFACE BETWEEN UART AND SERIAL PORT CONNECTOR LESS THAN 20mW QUIESCENT POWER CONSUMPTION WIDE DRIVER SUPPLY VOLTAGE: 7 TO 13.2V DRIVER OUTPUT SLEW RATE LIMITED TO 30V/µs MAX RECEIVER INPUT HYSTERESIS: 1.1 TYP PUSH-PULL RECEIVER OUTPUTS ON CHIP RECEIVER 1µs NOISE FILTER FUNCTIONALLY INTERCHANGEABLE WITH STM ST75185 ESD PROTECTION: ±10KV HUMAN BODY MODEL DESCRIPTION The ST75C185 is low power BICMOS device containing three independent drivers and five receivers that is used to interface data terminal equipment (DTE) with data circuit-terminating equipment (DCE). This device has been designed to conform to Standards ANSI/EIA-232-E. The drivers have a controlled output slew rate that is limited to a maximum of 30V/µs and the receivers have filters that reject input noise pulses that are shorter than 1µs. Both (Micro Package) (Plastic Package) (TSSOP Package) these features eliminate the need of external components. The ST75C185 hasn’t a power sequence fault condition. It has been designed using low-power techniques in a BICMOS tecnology. In most application the receivers contained in this device will interface to single inputs peripheral devices such as ACEs, UARTs or microprocessors. By using sampling, such peripheral devices are usuallly insensitive to the transition times of the input signals. If this is not the case, or for other uses, it is recommended that the ST75C185 receiver outputs be buffered by single gates of the HCMOS, ALS or 74F logic families. PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM June 2000 1/13 ST75C185 ORDER CODES T ype T emperature Ran ge Package Comments ST75C185CN 0 to 70 oC DIP-20 20 parts per tube / 50 tubes per box ST75C185CD 0 to 70 oC SO-20 (Tube) 40 parts per tube / 25 tubes per box ST75C185CDR 0 to 70 C SO-20 (Tape & Reel) 1000 parts per reel ST75C185CTR 0 to 70 oC TSSOP20 (Tape & Reel) 2500 parts per reel ST75C185BN -40 to 85 oC DIP-20 20 parts per tube / 50 tubes per box ST75C185BD -40 to 85 oC SO-20 (Tube) 40 parts per tube / 25 tubes per box ST75C185BDR -40 to 85 oC SO-20 (Tape & Reel) 1000 parts per reel ST75C185BTR -40 to 85 oC TSSOP20 (Tape & Reel) 2500 parts per reel o PIN DESCRIPTION 2/13 PIN No SYMBOL 1 VDD Supply Voltage (+12V) NAME AND F UNCTIO N 2 RA1 First Receiver Input 3 RA2 Second Receiver Input 4 RA3 Third Receiver Input 5 DY1 First Driver Output 6 DY2 Second Driver Output 7 RA4 FourthReceiver Input 8 DY3 Third Driver Output 9 RA5 Fifth Receiver Input 10 VSS Supply Voltage (-12V) 11 GND Ground 12 RY5 Fifth Receiver Output 13 DA3 Third Driver Input 14 RY4 Fourth Receiver Output 15 DA2 Second Driver Input 16 DA1 First Driver Input 17 RY3 Third Receiver Output 18 RY2 Second Receiver Output 19 RY1 First Receiver Output 20 VCC Supply Voltage (+5V) ST75C185 ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE (unless otherwise specified) Symbol Value Un it VDD Supply Voltage (Note 1) Parameter 15 V VSS Supply Voltage (Note 1) -15 V VCC Supply Voltage (Note 1) 7 V VI Input Voltage Range (DRIVER) -0.3 to (VCC+0.3) V VI Input Voltage Range (RECEIVER) -30 to 30 V VO Output Voltage Range (DRIVER) (VSS-6) to (VDD+6) V VO Output Voltage Range (RECEIVER) -0.3 to (VCC+0.3) V 20 mA IO Receiver Low Level Output Current TA Operating Free-Air Temperature Range Tstg Storage Temperature Range TL Lead Temperature 1.6mm from case for 10 sec -40 to 85 o C -65 to +150 o C 260 o C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. NOTE1:All voltages are withrespect tothe network ground terminal. RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min TYP Max Unit VDD Supply Voltage 7 12 13.2 V VSS Supply Voltage -7 -12 -13.2 V VCC Supply Voltage 4.5 5 V IN Input Voltage (Note 2) IOH High Level Output Current RECEIVER IOL Low Level Output Current RECEIVER TA Operating Free-Air Temperature DRIVER RECEIVER 5.5 V 0 VCC V -25 25 -40 25 -1 mA 3.2 mA 85 o C NOTE 2: The algebraic convertion, where the more positive (less negative) limitis designed as maximum, is used in this datasheet for logic levels only, e.g. if -10V is a maximum, the typical value is a more negative voltage. 3/13 ST75C185 SUPPLY CURRENTS (VDD = 12V, VSS = -12V, VCC = 5V, unless otherwise specified) Symb ol Parameter T est Cond it ion s Value Min . T yp. Un it Max. IDD Supply Current from VDD No load. All inputs at 2 or 0.8V 115 500 µA ISS Supply Current from VSS No load. All inputs at 2 or 0.8V -115 -500 µA ICC Supply Current from VCC No load. All inputs at 0 or 5V 950 1500 µA DRIVER ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (VDD = 12V, VSS = -12V, VCC = 5V±10%, unless otherwise specified) Symb ol VOH Parameter High Level Output Voltage VOL Low Level Output Voltage (Note 3) VIH High Level Input Voltage VIL Low Level Input Voltage IIH High Level Input Current T est Cond it ion s VIL = 0.8V R L = 3KΩ (See Figure 1) VIH = 1.9 V R L = 3KΩ (See Figure 1) Value Un it Min . T yp. VDD = 7V, VSS = -7V 5 6.3 V VDD = 12V, V SS = -12V 10 10.8 V VDD = 7V, VSS = -7V VDD = 12V, V SS = -12V 2 Max. -6.3 -5 V -10.8 -10 V 1.4 1.4 VI = 5 V (See Figure 2) V 0.8 V 1 µA IIL Low Level Input Current VI = 0 V (See Figure 2) -1 µA IOS(H) High Level Short Circuit Output Current (Note 4) VI = 0.8 V V O = 0V or VSS (See Figure 1) -6 -20 -60 mA IOS(L) Low Level Short Circuit Output Current (Note 4) VI = 2 V V O = 0V or VSS (See Figure 1) 6 35 60 mA Output Resistance VO = -2 to 2 V VSS = VCC = VDD = 0V 300 450 RO Ω NOTE 3: The algebraic convention, where the more positive (less negative) limitis designated as maximum, is used in this datasheet for logic levels only (e.g. if -10V is a maximum, the typical value is a more negative voltage). NOTE 4: Notmore than one outputs should be shorted atone time. DRIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V TA = 25 oC) Symb ol Parameter T est Cond it ion s Value Min . Un it T yp. Max. tPLH Propagation Delay Time, Low R L = 3 to 7 KΩ C L = 1000 pF to High Level Output (See Figures 3) 1.9 4 µs tPHL Propagation Delay Time High to Low Level Output R L = 3 to 7 KΩ C L = 1000 pF (See Figures 3) 1.6 4 µs tTLH Transition Time Low to High Level Output R L = 3 to 7 KΩ C L = 1000 pF (See Figures 3) 0.53 2 3.2 µs tTHL Transition Time High to Low Level Output R L = 3 to 7 KΩ (See Figure 3) 0.53 2 3.2 µs SR Output Slew Rate (Note 5) R L = 3 to 7 KΩ C L = 50 to 2500 pF (See Figure 3) 4 11 30 V/µs C L = 1000 pF NOTE 5: Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all unused inputs tied either high or low. 4/13 ST75C185 RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (VDD = 12V, VSS = -12V, VCC = 5V±10%, unless otherwise specified) Symb ol Parameter T est Cond it ion s Value Un it Min . T yp. Max. VT+ Positive Going Threshold Voltage (See Figure 6) 1.6 2.1 2.55 VT- Negative Going Threshold Voltage (See Figure 6) 0.65 1 1.25 Vhys Input Hysteresis (VT+ - VT-) (Note 6) 0.6 1.1 VOH High Level Output Voltage (Note 7) IOH = 0.75mA or Input Open IOH = -1mA (See Figure 6) 3.5 4.8 VOL Low Level Output Voltage VI = 3 V IOL = 3.2 mA (See Figure 6) High Level Input Current VI = 25 V (See Figure 6) VI = 3 V (See Figure 6) IIH IIL Low Level Input Current V V V V 0.2 0.4 V 3.6 4.5 8.3 mA 0.43 0.55 1 VI = -25 V (See Figure 6) -3.6 -4.4 -8.3 VI = -3 V (See Figure 6) -0.4 -0.55 -1 mA IOS(H) Short-Circuit Output Current at High Level VI = 0.75 V VO = 0 V (See Figure 5) -13 -30 mA IOS(L) Short-Circuit Output Current at Low Level VI = VCC VO = VCC (See Figure 5) 35 60 mA Alltypical values are at TA = 25 oC, NOTE 6: Hysteresis is thedifference between the positive going input threshold voltage, V T+, and the negative going input threshold voltage VT-. NOTE 7: Ifthe inputs are letf unconnected, the receiver interprets this as an input low, and the receiver outputs will remain in the high state. RECEIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V±10% TA = 25 oC) Symbo l Parameter T est Co nditio ns Value Min. Unit Typ . Max. tPLH Propagation Delay Time, Low R L = 5 KΩ CL = 50 pF to High Level Output (See Figure 6) 3.2 4 µs tPHL Propagation Delay Time High to Low Level Output R L = 5 KΩ CL = 50 pF (See Figure 6) 2.6 4 µs tTLH Transition Time Low to High Level Output R L = 5 KΩ CL = 50 pF (See Figure 6) 30 100 ns tTHL Transition Time High to Low Level Output R L = 5 KΩ CL = 50 pF (See Figure 6) 10 50 ns tW(N) Pulse Duration of longest pulse rejection as noise (Note8) R L = 5 KΩ CL = 50 pF (See Figure 6) 2.3 4 µs 1 NOTE 8: The receiver ignores any positive or negative going pulse that is less than the minimumvalue oft W(N) and accepts anypositive or negative going pulse greater than the maximum of tW(N). 5/13 ST75C185 APPLICATION CIRCUITS TTL LEVEL Vdd +12 V RS232 LEVEL Vcc +5 V ST75C185 20 DCD 38 19 DSR 37 18 RXD 21 17 UART RTS (16550) TXD 32 11 CTS 36 DTR 33 RI 39 PC Serial Port 100nF 100nF Vcc Rout1 Rout2 Vdd Rin1 1 2 DCD Rin2 6 3 Rout3 Rin3 Din1 Dout1 Din2 Dout2 Rout4 Rin4 Din3 Dout3 Rout5 Rin5 GND Vss DSR 4 2 RXD 7 5 16 15 14 13 CL RTS 6 7 CL 9 CTS DTR RI 10 100nF Vss -12V 3 TXD CL 8 12 11 1 8 4 9 5 GND DB9S EIA232-E Serial Port Connector To CPU BUS FIGURE 1: Driver Test Circuit for VOH, VOL, ISO(H) and ISO(L) 6/13 FIGURE 2: Driver Test Circuit for IIH and IIL ST75C185 FIGURE 3:Driver Test Circuit FIGURE 4: Driver Voltage Waveforms FIGURE 5: Receiver Test Circuit for IOS FIGURE 6: Receiver Test Circuit for VT, VOH, VOL FIGURE 7: Receiver Test Circuit FIGURE 8: Receiver Voltage Waveforms NOTE A: The pulse generator has the following characteristics: tW = 25 µs,PRR = 20 KHz, ZO = 50 Ω, tr = tf < 50ns. NOTE B: CL includes probe and jig capacitance. 7/13 ST75C185 Driver Voltage Transfer Characteristics Driver Output Current vs Output Voltage Driver Short Circuit Output Current vs Free-Air Temperature Device Supply Current vs Temperature Receiver Threshold vs Temperature Receiver Threshold vs Supply Voltage 8/13 ST75C185 APPLICATION INFORMATION: DIODES ON POWER SUPPLY Diodes placed in series with the VDD and VSS leads protect the ST75C185 in the fault condition in which the devices output are shorted to ±15V and the power supplies are at low state and provide low-impedance path to ground (see Figure below). Any idle transmitter input must be connected to GND or VCC. This device is not sensitive to power supply sequence. +Vdd Output ST75C185 Output ST75C185 Output shorted to ±15V -Vss 9/13 ST75C185 Plastic DIP-20 (0.25) MECHANICAL DATA mm DIM. MIN. a1 0.254 B 1.39 TYP. inch MAX. MIN. TYP. MAX. 0.010 1.65 0.055 0.065 b 0.45 0.018 b1 0.25 0.010 D 25.4 1.000 E 8.5 0.335 e 2.54 0.100 e3 22.86 0.900 F 7.1 0.280 I 3.93 0.155 L Z 3.3 0.130 1.34 0.053 P001J 10/13 ST75C185 SO-20 MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 2.65 0.10 0.104 0.20 a2 MAX. 0.004 0.007 2.45 0.096 b 0.35 0.49 0.013 0.019 b1 0.23 0.32 0.009 0.012 C 0.50 0.020 c1 45 (typ.) D 12.60 13.00 0.496 0.512 E 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 11.43 0.450 F 7.40 7.60 0.291 0.299 L 0.50 1.27 0.19 0.050 M S 0.75 0.029 8 (max.) P013L 11/13 ST75C185 TSSOP20 MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. A MIN. TYP. 1.1 0.433 A1 0.05 0.10 0.15 0.002 0.004 0.006 A2 0.85 0.9 0.95 0.335 0.354 0.374 b 0.19 0.30 0.0075 0.0118 c 0.09 0.2 0.0035 0.0079 D 6.4 6.5 6.6 0.252 0.256 0.260 E 6.25 6.4 6.5 0.246 0.252 0.256 E1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 BSC 0.0256 BSC K 0o 4o 8o 0o 4o 8o L 0.50 0.60 0.70 0.020 0.024 0.028 A A2 A1 b K e E1 PIN 1 IDENTIFICATION 1 L E c D 12/13 MAX. ST75C185 Information furnished is believed to be accurate and reliable. However, STMicroelectronic s 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. Specification 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 withoutexpress written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 2000 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com . 13/13