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UTC 75185
LINEAR INTEGRATED CIRCUIT
MULTIPLE RS-232 DRIVERS AND RECEIVERS
DESCRIPTION
The UTC 75185 complies with the requirements of the TIA/EIA232-F and ITU (formerly CCITT) v.28 standards. These standards are for data interchange between a host computer and peripheral at signaling rates up to 20kbit/s. The switching speeds of the UTC 75185 are fast enough to support rates up to 120kbite/s with lower capacitive loads (shorter cables). Interoperability at the higher signaling rates cannot be assured unless the designer has design control of the cable and the interface circuits at both ends. For interoperability at signaling rates to 120kbit/s, use of ITA/EIA-423-B (ITU v.10) and TIA/EIA-422-B (ITU v.11) standards are recommended. The UTC 75185 is Characterized for operation over the temperature range of 0C to 70C.
TSSOP-20
SOP-20
DIP-20
FEATURES
*Single chip with easy interface between UART and Serial-Port connector of IBMTM, PC/ATTM and Compatibles. *Three drivers and five receivers meet or exceed the requirements of TIA/EIA-232-F and ITU v.28 standards. *Designed to support data rates up to 120 kbps *ESD protection meets or exceeds 10 kV on RS-232 pins and 5 kV on all other pins (Human-Body Model)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R113-003,B
UTC 75185
PIN CONFIGURATIONS
LINEAR INTEGRATED CIRCUIT
VDD RA1 RA2 RA3 DY1 DY2 RA4 DY3 RA5 VSS
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC RY1 RY2 RY3 DA1 DA2 RY4 DA3 RY5 GND
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 FUNCTION
Supply Voltage First Receiver Input Second Receiver Input Third Receiver Input First Driver Output Second Driver Output Fourth Receiver Input Third Driver Output Fifth Receiver Input Supply Voltage 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
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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UTC 75185
LINEAR INTEGRATED CIRCUIT
LOGIC SYMBOL AND LOGIC DIAGRAM
This symbol is in accordance with ANSI/IEEE std 91-1984 and IEC Publication 617-12
CIRCUIT OF DRIVERS (Resistor value shown are nominal.)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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UTC 75185
LINEAR INTEGRATED CIRCUIT
CIRCUIT OF EACH RECEIVER (Resistor value shown are nominal.)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R113-003,B
UTC 75185
LINEAR INTEGRATED CIRCUIT
SYMBOL VALUE UNIT
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE (unless otherwise specified)
PARAMETER
Supply voltage (Note 1) VDD 15 V Supply voltage (Note 1) Vss -15 V Supply voltage (Note 1) Vcc 10 V Input voltage range (DRIVER) VI -15 to 7 V Input voltage range (RECEIVER) VI -30 to 30 V Driver output voltage range Vo -15 to 15 V Receiver low level output current Io 20 mA Thermal impedance (note 2) 97 SOP-20 C/W JA 67 DIP-20 Electrostatic discharge Human-body model: RS-232 pins, class 3, A (note 3) 10 kV Human-body model: All pins, class 3, A (note 4) 5 kV Machine model: RS-232 pins, class 3, B(note 5) 600 V Machine model: All pins, class 3, B (note 4) 300 V Storage temperature range Tstg -65 to +150 C Lead temperature 1.6mm from case for 10 sec TL 260 C Note 1: All voltage are with respect to the network ground terminal. Note 2: The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero. Note 3: RS-232 pins are tested with respect to ground and each other. Note 4: Per MIL-PRF-38535. Note 5: RS-232 pins are tested with respect to ground.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply voltage Supply voltage Supply voltage High level input voltage (driver only) Low level input voltage (driver only) High level output current DRIVER RECEIVER Low level output current DRIVER RECEIVER Operating free-air temperature
SYMBOL
VDD VSS VCC VIH VIL IOH
MIN
7.5 -7.5 4.5 1.9
TYP
9 -9 5
MAX
15 -15 5.5 0.8 -6.0 -0.5
UNIT
V V V V V mA
mA IOL TA 0 6 16 70
C
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UNISONIC TECHNOLOGIES CO., LTD.
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UTC 75185
SUPPLY CURRENTS
PARAMETER
Supply current from VDD
LINEAR INTEGRATED CIRCUIT
SYMBOL TEST CONDITIONS
VDD Vss No load. 9 -9 All inputs at 1.9V 12 -12 15 -15 9 -9 No load. All inputs at 0.8V 12 -12 15 -15 No load. 9 -9 All inputs at 1.9V 12 -12 15 -15 No load. 9 -9 All inputs at 0.8V 12 -12 15 -15 No load. All inputs at 5V, Vcc=5V MIN MAX 15 19 25 4.5 5.5 9 -15 -19 -25 -3.2 -3.2 -3.2 30 UNIT mA mA
IDD
Supply current from Vss Iss
mA
mA
Supply current from Vcc
Icc
mA
DRIVER ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING FREE-AIR TEMPERATURE RANGE (VDD=9V, Vss=-9V, Vcc=5V, unless otherwise specified)
PARAMETER
High level output voltage Low level output voltage (note 6) High level input current Low level input current High level short circuit output current (note 7) Low level short circuit output current Output resistance (note 8)
SYMBOL
VOH VOL IIH IIL IOS(H) IOS(L) rO
TEST CONDITIONS
VIL=0.8V, RL=3 k (Figure 1) VIH=1.9V, RL=3 k (Figure 1) VI=5V (Figure 2) VI=0V (Figure 2) VIL=0.8V, VO=0V(Figure 1)
MIN 6
TYP 7.5 -7.5
MAX -6 10 -1.6 -19.5
UNIT
V V A mA mA
-4.5
-12
VIH=2V, Vo=0V(Figure 1) 4.5 12 19.5 mA VDD=Vss=Vcc=0V 300 Vo=-2 to 2V Note 6: The algebraic convention, where the more positive (less negative) limit is 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 7: Output short circuit conditions must maintain the total power dissipation below absolute maximum ratings. Note 8: Test conditions are those specified by TIA/EIA232-F and as listed above.
DRIVER SWITCHING CHARACTERISTICS (VDD=12V, Vss=-12V, Vcc=5V, TA=25C)
PARAMETER
Propagation delay time, low to high level output Propagation delay time, high to low level output Transition time, low to high level output
SYMBOL
TEST CONDITIONS
RL=3 to 7 k, CL=15pF (Figure 3) RL=3 to 7 k, CL=15pF (Figure 3) RL=3 to 7 k, CL=15pF (Figure 3) RL=3 to 7 k, CL=2500pF (Note 9,Figure 3)
MIN
tPLH
tPHL
TYP 315 75 60 1.7
MAX 500 175 100 2.5
UNIT
ns ns ns s
tTLH
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UNISONIC TECHNOLOGIES CO., LTD.
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UTC 75185
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL TEST CONDITIONS
RL=3 to 7 k, CL=15pF (Figure 3) MIN TYP 40 MAX 75
UNIT
ns
Transition time high to low level output
RL=3 to 7 k, CL=2500pF 1.5 2.5 s (Note 10, Figure 3) Note 9: Measured between -3V and 3V points of the output waveform (TIA/EIA-232-F conditions), all unused inputs are tied. Note 10: Measured between 3V and -3V points of the output waveform (TIA/EIA-232-F conditions), all unused inputs are tied.
tTHL
RECEIVER ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING CONDITIONS (TA=25C, Vcc=5V, VDD=9V, Vss=-9V)
PARAMETER
Positive going threshold voltage VT+ Negative going threshold voltage Input hysteresis(VT+ - VT-) High level output voltage Low level output voltage High level input current Low level input current Short-circuit output current VTVhys VOH VOL IIH IIL Ios IoH=-0.5mA VIH=0.75V Inputs Open VI=3V, IOL=10mA VI=25V (Figure 5) VI=3V (Figure 5) VI=-25V (Figure 5) VI=-3V (Figure 5) (Figure 4)
SYMBOL
TEST CONDITIONS
(Figure 5) TA=25C TA=0C to 70C
MIN 1.75 1.55 0.75 0.5 2.6 2.6
TYP 1.9 0.97 4 0.2
MAX 2.3 2.3 1.25 5 0.45 8.3 -8.3
UNIT
V
V V V V mA mA mA
3.6 0.43 -3.6 -0.43 -3.4
-12
RECEIVER SWITCHING CHARACTERISTICS (VDD=12V, Vss=-12V, Vcc=5V, TA=25C)
PARAMETER
Propagation delay time, low to high level output Propagation delay time, high to low level output Transition time low to high level output Transition time high to low level output
SYMBOL
tPLH tPHL tTLH tTHL
TEST CONDITIONS
RL=5 k, CL=50pF (Figure 6)
MIN
TYP 107 42 175 16
MAX 500 150 525 60
UNIT
ns ns ns ns
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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UTC 75185
LINEAR INTEGRATED CIRCUIT
Figure 1. Driver test circuit for VOH, VOL, IOS(H), IOS(L)
Figure 2. Driver test circuit for IIH, IIL
Figure 3. Driver test circuit and voltage waveforms
Note 1. The pulse generator has the following characteristics: tw=25s, PRR=20kHz, Zo=50, tr=tf<50ns. Note 2. CL includes probe and jig capacitance.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R113-003,A
UTC 75185
LINEAR INTEGRATED CIRCUIT
Figure 4. Receiver test circuit for IOS
Figure 5. Receiver test circuit for VT, VOH, VOL
Figure 6. Receiver propagation and transition times
Note 1. The pulse generator has the following characteristics: tw=25s, PRR=20kHz, Zo=50, tr=tf<50ns. Note 2. CL includes probe and jig capacitance.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
9
QW-R113-003,A
UTC 75185
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (DRIVER)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
10
QW-R113-003,A
UTC 75185
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (RECEIVER)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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UTC 75185
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION Figure 15. Power-Supply protection to meet Power-Off fault conditions of TIA/TIA-232-F
Diodes placed in series with the VDD and VSS leads protect the UTC 75185 in the fault condition in which the device outputs are shorted to 15V and the power supplies are at low and provide low-impedance paths to ground.
Figure 16. Typical Connection
" " : See Figure 10 to select the correct values for the loading capacitors (C1, C2, and C3), which are required to meet the RS-232 maximum slew-rate requirement of 30V/s. The value of the loading capacitors required depends upon the line length and desired slew rate, but typically is 330 pF.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
12
QW-R113-003,A
UTC 75185
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R113-003,A

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