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ST75C185
LOW POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS
TARGET DATA
s s
s
s s
s s s s
s
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/s MAX RECEIVER INPUT HYSTERESIS: 1.1 TYP PUSH-PULL RECEIVER OUTPUTS ON CHIP RECEIVER 1s NOISE FILTER FUNCTIONALLY INTERCHANGEABLE WITH STM ST75185 ESD PROTECTION: 10KV HUMAN BODY MODEL
(Micro Package)
(Plastic Package) (TSSOP Package)
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/s and the receivers have filters that reject input noise pulses that are shorter than 1s. Both
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 ST75C185CN ST75C185CD ST75C185CDR ST75C185CTR ST75C185BN ST75C185BD ST75C185BDR ST75C185BTR T emperature Ran ge 0 to 70 oC 0 to 70 oC 0 to 70 C 0 to 70 oC -40 to 85 oC -40 to 85 oC -40 to 85 oC -40 to 85 oC
o
Package DIP-20 SO-20 (Tube) SO-20 (Tape & Reel) TSSOP20 (Tape & Reel) DIP-20 SO-20 (Tube) SO-20 (Tape & Reel) TSSOP20 (Tape & Reel)
Comments 20 parts per tube / 50 tubes per box 40 parts per tube / 25 tubes per box 1000 parts per reel 2500 parts per reel 20 parts per tube / 50 tubes per box 40 parts per tube / 25 tubes per box 1000 parts per reel 2500 parts per reel
PIN DESCRIPTION
PIN No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SYMBOL VDD RA1 RA2 RA3 DY1 DY2 RA4 DY3 RA5 VSS GND RY5 DA3 RY4 DA2 DA1 RY3 RY2 RY1 VCC NAME AND F UNCTIO N Supply Voltage (+12V) First Receiver Input Second Receiver Input Third Receiver Input First Driver Output Second Driver Output FourthReceiver Input Third Driver Output Fifth Receiver Input Supply Voltage (-12V) Ground Fifth Receiver Output Third Driver Input Fourth Receiver Output Second Driver Input First Driver Input Third Receiver Output Second Receiver Output First Receiver Output Supply Voltage (+5V)
2/13
ST75C185
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE (unless otherwise specified)
Symbol VDD VSS VCC VI VI VO VO IO TA Tstg TL Parameter Supply Voltage (Note 1) Supply Voltage (Note 1) Supply Voltage (Note 1) Input Voltage Range (DRIVER) Input Voltage Range (RECEIVER) Output Voltage Range (DRIVER) Output Voltage Range (RECEIVER) Receiver Low Level Output Current Operating Free-Air Temperature Range Storage Temperature Range Lead Temperature 1.6mm from case for 10 sec Value 15 -15 7 -0.3 to (VCC+0.3) -30 to 30 (VSS-6) to (VDD+6) -0.3 to (VCC+0.3) 20 -40 to 85 -65 to +150 260 Un it V V V V V V V mA
o o o
C C 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 VDD VSS VCC V IN IOH IOL TA Supply Voltage Supply Voltage Supply Voltage Input Voltage (Note 2) High Level Output Current Low Level Output Current Operating Free-Air Temperature Parameter Min 7 -7 4.5 TYP 12 -12 5 Max 13.2 -13.2 5.5 VCC 25 -1 3.2 -40 25 85 mA mA
o
Unit V V V V
DRIVER
RECEIVER RECEIVER RECEIVER
0 -25
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.
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ST75C185
SUPPLY CURRENTS (VDD = 12V, VSS = -12V, VCC = 5V, unless otherwise specified)
Symb ol IDD ISS ICC Parameter Supply Current from VDD Supply Current from VSS Supply Current from VCC T est Cond it ion s Min . No load. All inputs at 2 or 0.8V No load. All inputs at 2 or 0.8V No load. All inputs at 0 or 5V Value T yp. 115 -115 950 Max. 500 -500 1500 A A A Un it
DRIVER ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (VDD = 12V, VSS = -12V, VCC = 5V10%, unless otherwise specified)
Symb ol VOH Parameter High Level Output Voltage T est Cond it ion s Min . VIL = 0.8V R L = 3K (See Figure 1) VIH = 1.9 V R L = 3K (See Figure 1) VDD = 7V, VSS = -7V VDD = 12V, V SS = -12V VDD = 7V, VSS = -7V VDD = 12V, V SS = -12V 2 VI = 5 V (See Figure 2) VI = 0 V (See Figure 2) VI = 0.8 V V O = 0V or VSS (See Figure 1) VI = 2 V V O = 0V or VSS (See Figure 1) VO = -2 to 2 V VSS = VCC = VDD = 0V -6 6 300 -20 35 450 5 10 Value T yp. 6.3 10.8 -6.3 -10.8 1.4 1.4 0.8 1 -1 -60 60 -5 -10 Max. V V V V V V A A mA mA Un it
VOL
Low Level Output Voltage (Note 3) High Level Input Voltage Low Level Input Voltage High Level Input Current Low Level Input Current High Level Short Circuit Output Current (Note 4) Low Level Short Circuit Output Current (Note 4) Output Resistance
VIH VIL IIH IIL IOS(H) IOS(L) RO
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 tPLH tPHL tTLH tTHL SR Parameter T est Cond it ion s Min . Propagation Delay Time, Low R L = 3 to 7 K C L = 1000 pF to High Level Output (See Figures 3) Propagation Delay Time High to Low Level Output Transition Time Low to High Level Output Transition Time High to Low Level Output Output Slew Rate (Note 5) R L = 3 to 7 K C L = 1000 pF (See Figures 3) R L = 3 to 7 K C L = 1000 pF (See Figures 3) R L = 3 to 7 K (See Figure 3) C L = 1000 pF 0.53 0.53 4 Value T yp. 1.9 1.6 2 2 11 Max. 4 4 3.2 3.2 30 s s s s V/s Un it
R L = 3 to 7 K C L = 50 to 2500 pF (See Figure 3)
NOTE 5: Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all unused inputs tied either high or low.
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ST75C185
RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (VDD = 12V, VSS = -12V, VCC = 5V10%, unless otherwise specified)
Symb ol VT+ VTVhys VOH VOL IIH IIL IOS(H) IOS(L) Parameter Positive Going Threshold Voltage Negative Going Threshold Voltage Input Hysteresis (VT+ - VT-) (Note 6) High Level Output Voltage (Note 7) Low Level Output Voltage High Level Input Current Low Level Input Current Short-Circuit Output Current at High Level Short-Circuit Output Current at Low Level IOH = 0.75mA or Input Open IOH = -1mA (See Figure 6) VI = 3 V IOL = 3.2 mA (See Figure 6) VI = 25 V VI = 3 V VI = -25 V VI = -3 V (See Figure 6) (See Figure 6) (See Figure 6) (See Figure 6) 3.6 0.43 -3.6 -0.4 T est Cond it ion s Min . (See Figure 6) (See Figure 6) 1.6 0.65 0.6 3.5 Value T yp. 2.1 1 1.1 4.8 0.2 4.5 0.55 -4.4 -0.55 -13 35 0.4 8.3 1 -8.3 -1 -30 60 mA mA mA Max. 2.55 1.25 V V Un it
V V V mA
VI = 0.75 V VO = 0 V (See Figure 5) VI = VCC VO = VCC (See Figure 5)
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 = 5V10% TA = 25 oC)
Symbo l tPLH tPHL tTLH tTHL tW(N) Parameter T est Co nditio ns Min. Propagation Delay Time, Low R L = 5 K CL = 50 pF to High Level Output (See Figure 6) Propagation Delay Time High to Low Level Output Transition Time Low to High Level Output Transition Time High to Low Level Output Pulse Duration of longest pulse rejection as noise (Note8) R L = 5 K CL = 50 pF (See Figure 6) R L = 5 K CL = 50 pF (See Figure 6) R L = 5 K CL = 50 pF (See Figure 6) R L = 5 K CL = 50 pF (See Figure 6) 1 Value Typ . 3.2 2.6 30 10 2.3 Max. 4 4 100 50 4 s s ns ns s Unit
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).
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ST75C185
APPLICATION CIRCUITS
TTL LEVEL
Vdd +12 V
ST75C185
Vcc +5 V
100nF
RS232 LEVEL
PC Serial Port
1
100nF
20
Vcc Rout1 Rout2 Rout3 Din1
Vdd Rin1 Rin2
1
DCD 38 DSR 37 RXD 21
19
2
DCD
3
18
6 2 7 3 8 4 9 5
Rin3
4
DSR RXD
5
17
UART RTS (16550) TXD
Dout1 Dout2 Rin4 Dout3
8
32 11
16
Din2
15
CL
6 7
RTS
CL
CTS 36 DTR 33 RI 39
Rout4
14
TXD CTS CL DTR RI
Din3
13
Rout5
12 11
Rin5
9
GND
Vss
10
100nF
GND
Vss -12V
DB9S EIA232-E Serial Port Connector
To CPU BUS
FIGURE 1: Driver Test Circuit for VOH, VOL, ISO(H) and ISO(L)
FIGURE 2: Driver Test Circuit for IIH and IIL
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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 s,PRR = 20 KHz, ZO = 50 , 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 MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.34 8.5 2.54 22.86 7.1 3.93 0.130 0.053 0.254 1.39 0.45 0.25 25.4 0.335 0.100 0.900 0.280 0.155 1.65 TYP. MAX. MIN. 0.010 0.055 0.018 0.010 1.000 0.065 inch TYP. MAX.
DIM.
P001J
10/13
ST75C185
SO-20 MECHANICAL DATA
DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F L M S 7.40 0.50 12.60 10.00 1.27 11.43 7.60 1.27 0.75 8 (max.) 0.291 0.19 13.00 10.65 0.35 0.23 0.50 45 (typ.) 0.496 0.393 0.050 0.450 0.299 0.050 0.029 0.512 0.419 0.10 mm TYP. MAX. 2.65 0.20 2.45 0.49 0.32 0.013 0.009 0.020 0.004 MIN. inch TYP. MAX. 0.104 0.007 0.096 0.019 0.012
P013L
11/13
ST75C185
TSSOP20 MECHANICAL DATA
mm MIN. A A1 A2 b c D E E1 e K L 0o 0.50 0.05 0.85 0.19 0.09 6.4 6.25 4.3 6.5 6.4 4.4 0.65 BSC 4o 0.60 8o 0.70 0o 0.020 0.10 0.9 TYP. MAX. 1.1 0.15 0.95 0.30 0.2 6.6 6.5 4.48 0.002 0.335 0.0075 0.0035 0.252 0.246 0.169 0.256 0.252 0.173 0.0256 BSC 4o 0.024 8o 0.028 0.004 0.354 MIN. inch TYP. MAX. 0.433 0.006 0.374 0.0118 0.0079 0.260 0.256 0.176
DIM.
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1
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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 (c) 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 .
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