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MC1488 Quad Line EIA-232D Driver
The MC1488 is a monolithic quad line driver designed to interface data terminal equipment with data communications equipment in conformance with the specifications of EIA Standard No. EIA-232D.
Features
* Current Limited Output
10 mA typical
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SOIC-14 D SUFFIX CASE 751A
* Power-Off Source Impedance
300 W minimum
14 1
* Simple Slew Rate Control with External Capacitor * Flexible Operating Supply Range * Compatible with All ON Semiconductor MDTL and MTTL Logic *
Families Pb-Free Packages are Available
14 1
PDIP-14 P SUFFIX CASE 646
14
SOEIAJ-14 M SUFFIX CASE 965 1
PIN CONNECTIONS
VEE 1 Input A 2 Output A 3 Input B1 4 Input B2 5
MDTL Logic Input Interconnecting Cable MDTL Logic Output
Line Driver MC1488
Interconnecting Cable
Line Receiver MC1489
14 VCC 13 Input D1 12 Input D2 11 Output D 10 Input C1 9 Input C2 8 Output C
Output B 6 Gnd 7
Figure 1. Simplified Application ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking section on page 8 of this data sheet.
(c) Semiconductor Components Industries, LLC, 2006
October, 2006 - Rev. 8
1
Publication Order Number: MC1488/D
MC1488
VCC 14 8.2 k Pins 4, 9, 12 or 2 Input Input Pins 5, 10, 13 6.2 k
70 300 Output Pins 6, 8, 11 or 3
3.6 k
GND 7
10 k 7.0 k VEE 1 70
Figure 2. Circuit Schematic
(1/4 of Circuit Shown)
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MC1488
MAXIMUM RATINGS (TA = + 25C, unless otherwise noted.)
Rating Power Supply Voltage Input Voltage Range Output Signal Voltage Power Derating (Package Limitation, SO-14 and Plastic Dual-In-Line Package) Derate above TA = + 25C Operating Ambient Temperature Range Storage Temperature Range Symbol VCC VEE VIR VO PD 1/RqJA TA Tstg Value + 15 - 15 - 15 p VIR p 7.0 15 1000 6.7 0 to + 75 - 65 to + 175 Unit Vdc Vdc Vdc mW mW/C C C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
ELECTRICAL CHARACTERISTICS (VCC = + 9.0 1% Vdc, VEE = - 9.0 1% Vdc, TA = 0 to 75C, unless otherwise noted.)
Characteristic Input Current - Low Logic State (VIL = 0) Input Current - High Logic State (VIH = 5.0 V) Output Voltage - High Logic State (VIL = 0.8 Vdc, RL = 3.0 kW , VCC = + 9.0 Vdc, VEE = - 9.0 Vdc) (VIL = 0.8 Vdc, RL = 3.0 kW , VCC = + 13.2 Vdc, VEE = - 13.2 Vdc) Output Voltage - Low Logic State (VIH = 1.9 Vdc, RL = 3.0 kW , VCC = + 9.0 Vdc, VEE = - 9.0 Vdc) (VIH = 1.9 Vdc, RL = 3.0 kW , VCC = + 13.2 Vdc, VEE = - 13.2 Vdc) Positive Output Short-Circuit Current, Note 1 Negative Output Short-Circuit Current, Note 1 Output Resistance (VCC = VEE = 0, VO = 2.0 V) Positive Supply Current (RI = ) (VIH = 1.9 Vdc, VCC = + 9.0 Vdc) (VIL = 0.8 Vdc, VCC = + 9.0 Vdc) (VIH = 1.9 Vdc, VCC = + 12 Vdc) (VIL = 0.8 Vdc, VCC = + 12 Vdc) (VIH = 1.9 Vdc, VCC = + 15 Vdc) (VIL = 0.8 Vdc, VCC = + 15 Vdc) Negative Supply Current (RL = ) (VIH = 1.9 Vdc, VEE = - 9.0 Vdc) (VIL = 0.8 Vdc, VEE = - 9.0 Vdc) (VIH = 1.9 Vdc, VEE = - 12 Vdc) (VIL = 0.8 Vdc, VEE = - 12 Vdc) (VIH = 1.9 Vdc, VEE = - 15 Vdc) (VIL = 0.8 Vdc, VEE = - 15 Vdc) Power Consumption (VCC = 9.0 Vdc, VEE = - 9.0 Vdc) (VCC = 12 Vdc, VEE = - 12 Vdc) Symbol IIL IIH VOH Min - - + 6.0 + 9.0 - 6.0 - 9.0 + 6.0 - 6.0 300 - - - - - - - - - - - - - - Typ 1.0 - + 7.0 + 10.5 - 7.0 - 10.5 + 10 - 10 - + 15 + 4.5 + 19 + 5.5 - - - 13 - - 18 - - - - - Max 1.6 10 - - Vdc - - + 12 - 12 - + 20 + 6.0 + 25 + 7.0 + 34 + 12 - 17 - 500 - 23 - 500 - 34 - 2.5 333 576 mA mA mA mA mA mA mW mA mA Ohms mA Unit mA mA Vdc
VOL
IOS + IOS - ro ICC
IEE
PC
SWITCHING CHARACTERISTICS (VCC = + 9.0 1% Vdc, VEE = - 9.0 1% Vdc, TA = + 25C.)
Propagation Delay Time (zI = 3.0 k and 15 pF) Fall Time (zI = 3.0 k and 15 pF) (zI = 3.0 k and 15 pF) Propagation Delay Time (zI = 3.0 k and 15 pF) Rise Time tPLH tTHL tPHL tTLH - - - - 275 45 110 55 350 75 175 100 ns ns ns ns
1. Maximum Package Power Dissipation may be exceeded if all outputs are shorted simultaneously.
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MC1488
CHARACTERISTIC DEFINITIONS
9.0 V 14 -9.0 V 1 9.0 V 14 -9.0 V 1
1.9 V 5 10 VOL 4 VOH 13 9 12 0.8 V 2
2 4 9 12 7 IIL IIH 5.0 V
3 6 8 11 7 VOH VOL 3.0 k
Figure 3. Input Voltage
Figure 4. Output Current
VCC 14
VEE 14 7 1 1 2 3 6 IOS 5 8 9 10 11 12 13 VO 2.0 Vdc 6.6 mA Max
1.9 V 2 IOS + 4 9 12
3 6 8 11 7
4
IOS -
0.8 V
Figure 5. Output Short-Circuit Current
Figure 6. Output Resistance (Power Off)
VCC ein 1.9 V 2 VIH 4 7 9 VIL 12 1 VO 0.8 V IEE 50% tTHL tTHL and tTLH Measured 10% to 90% VEE tTLH ein ICC 3.0 k 15 pF VO
14 3.0 V 1.5 V tPHL tPLH 0V
Figure 7. Power Supply Currents
Figure 8. Switching Response
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MC1488
TYPICAL CHARACTERISTICS (TA = +25C, unless otherwise noted.)
12 9.0 V O , OUTPUT VOLTAGE (V) 6.0 3.0 0 -3.0 -6.0 -9.0 -12 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Vin, INPUT VOLTAGE (V) VI VO 3.0 k I SC , SHORT CIRCUIT OUTPUT CURRENT (mA) VCC = VEE = 12 V VCC = VEE = 9.0 V VCC = VEE = 6.0 V 12 9.0 6.0 3.0 0 -3.0 -6.0 -9.0 -12 -55 0 25 75 125 T, TEMPERATURE (C) IOS - 1.9 V VI 0.8 V VEE = 9.0 V VCC = 9.0 V IOS +
Figure 9. Transfer Characteristics versus Power Supply Voltage
Figure 10. Short Circuit Output Current versus Temperature
1000 IO , OUTPUT CURRENT (mA)
20 16 12 8.0 4.0 0 -4.0 -8.0 -12 1.9 V VI IOS 3.0 kW LOAD LINE
SLEW RATE (V/ s)
100
10
VI CL
VO
1.0 1.0
10
100 CL, CAPACITANCE (pF)
1,000
10,000
+ VO -16 0.8 V VCC = VEE = 9.0V - -20 -16 -12 -8.0 -4.0 0 4.0 VO, OUTPUT VOLTAGE (V)
8.0
12
16
Figure 11. Output Slew Rate versus Load Capacitance
Figure 12. Output Voltage and Current-Limiting Characteristics
VCC , VEE , POWER SUPPLY VOLTAGE (V)
16 14 12 10 8.0 6.0 4.0 2.0 0 -55 7 1 VEE 0 25 75 125 T, TEMPERATURE (C) VCC 14 3 3.0 k 6 3.0 k 8 3.0 k 11 3.0 k
Figure 13. Maximum Operating Temperature versus Power Supply Voltage
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MC1488
APPLICATIONS INFORMATION The Electronic Industries Association EIA-232D specification details the requirements for the interface between data processing equipment and data communications equipment. This standard specifies not only the number and type of interface leads, but also the voltage levels to be used. The MC1488 quad driver and its companion circuit, the MC1489 quad receiver, provide a complete interface system between DTL or TTL logic levels and the EIA-232D defined levels. The EIA-232D requirements as applied to drivers are discussed herein. The required driver voltages are defined as between 5.0 and 15 V in magnitude and are positive for a Logic "0" and negative for a Logic "1." These voltages are so defined when the drivers are terminated with a 3000 to 7000 W resistor. The MC1488 meets this voltage requirement by converting a DTL/TTL logic level into EIA-232D levels with one stage of inversion. The EIA-232D specification further requires that during transitions, the driver output slew rate must not exceed 30 V per microsecond. The inherent slew rate of the MC1488 is much too fast for this requirement. The current limited output of the device can be used to control this slew rate by connecting a capacitor to each driver output. The required capacitor can be easily determined by using the relationship C = IOS x DT/DV from which Figure 14 is derived. Accordingly, a 330 pF capacitor on each output will guarantee a worst case slew rate of 30 V per microsecond.
1000
7 1 7 1 7 1
power supply designs, a loss of system power causes a low impedance on the power supply outputs. When this occurs, a low impedance to ground would exist at the power inputs to the MC1488 effectively shorting the 300 W output resistors to ground. If all four outputs were then shorted to plus or minus 15 V, the power dissipation in these resistors would be excessive. Therefore, if the system is designed to permit low impedances to ground at the power supplies of the drivers, a diode should be placed in each power supply lead to prevent overheating in this fault condition. These two diodes, as shown in Figure 15, could be used to decouple all the driver packages in a system. (These same diodes will allow the MC1488 to withstand momentary shorts to the 25 V limits specified in the earlier Standard EIA-232B.) The addition of the diodes also permits the MC1488 to withstand faults with power supplies of less than the 9.0 V stated above.
VCC 14 MC1488 14 MC1488 14 MC1488
SLEW RATE (V/s)
100
VEE
30 V/ms
Figure 15. Power Supply Protection to Meet Power Off Fault Conditions
10 333 pF 1.0 1.0
The maximum short circuit current allowable under fault conditions is more than guaranteed by the previously mentioned 10 mA output current limiting.
10,000
10
100 C, CAPACITANCE (pF)
1,000
Other Applications
Figure 14. Slew Rate versus Capacitance for ISC = 10 mA
The interface driver is also required to withstand an accidental short to any other conductor in an interconnecting cable. The worst possible signal on any conductor would be another driver using a plus or minus 15 V, 500 mA source. The MC1488 is designed to indefinitely withstand such a short to all four outputs in a package as long as the power supply voltages are greater than 9.0 V (i.e., VCC q 9.0 V; VEE p - 9.0 V). In some
The MC1488 is an extremely versatile line driver with a myriad of possible applications. Several features of the drivers enhance this versatility: 1. Output Current Limiting - this enables the circuit designer to define the output voltage levels independent of power supplies and can be accomplished by diode clamping of the output pins. Figure 16 shows the MC1488 used as a DTL to MOS translator where the high level voltage output is clamped one diode above ground. The resistor divider shown is used to reduce the output voltage below the 300 mV above ground MOS input level limit.
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MC1488
2. Power Supply Range - as can be seen from the schematic drawing of the drivers, the positive and negative driving elements of the device are essentially independent and do not require matching power supplies. In fact, the positive supply can vary from a minimum 7.0 V (required for driving the negative pulldown section) to the maximum specified 15 V. The negative supply can vary from approximately - 2.5 V to the minimum specified - 15 V. The MC1488 will drive the output to within 2.0 V of the positive or negative supplies as long as the current output limits are not exceeded. The combination of the current limiting and supply voltage features allow a wide combination of possible outputs within the same quad package. Thus if only a portion of the four drivers are used for driving EIA-232D lines, the remainder could be used for DTL to MOS or even DTL to DTL translation. Figure 17 shows one such combination.
12 V
MDTL Input MDTL NAND Gate Input MDTL MHTL Input MDTL MMOS Input
2
3
MRTL Output -0.7 V to +3.7 V 3.0 V
1/4 MC1488 MDTL MTTL Input MOS Output (with VSS = GND) 10 k
4 6 5 9
MDTL Output -0.7 V to +5.7 V
1.0 k
MC1488 8 5.0 V MHTL Output -0.7 V to 10 V
-12 V
-12 V
10 12 11 13 1 7 14 1.0 k 10 k MOS Output -10 V to 0 V
Figure 16. MDTL/MTTL-to-MOS Translator
-12 V
12 V
Figure 17. Logic Translator Applications
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MC1488
ORDERING INFORMATION
Device MC1488D MC1488DG MC1488DR2 MC1488DR2G MC1488P MC1488PG MC1488M MC1488MG MC1488MEL MC1488MELG Package SOIC-14 SOIC-14 (Pb-Free) SOIC-14 SOIC-14 (Pb-Free) PDIP-14 PDIP-14 (Pb-Free) SOEIAJ-14 SOEIAJ-14 (Pb-Free) SOEIAJ-14 SOEIAJ-14 (Pb-Free) 2000/Tape & Reel 50 Units/Rail TA = 0 to +75C 25 Units/Rail 2500/Tape & Reel 55 Units/Rail Operating Temperature Range Shipping
MARKING DIAGRAMS
SOIC-14 D SUFFIX CASE 751A 14 MC1488G AWLYWW 1 1 14 MC1488DG AWLYWW 1 14
PDIP-14 P SUFFIX CASE 646
MC1488P AWLYYWWG
SOEIAJ-14 M SUFFIX CASE 965
MC1488 ALYWG
A WL, L YY, Y WW, W G
= Assembly Location = Wafer Lot = Year = Work Week = Pb-Free Package
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MC1488
PACKAGE DIMENSIONS
SOIC-14 CASE 751A-03 ISSUE H
-A-
14 8
-B-
P 7 PL 0.25 (0.010)
M
B
M
1
7
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION.
G C -T-
SEATING PLANE
R X 45 _
F
D 14 PL 0.25 (0.010)
K
M
M
S
J
TB
A
S
DIM A B C D F G J K M P R
MILLIMETERS MIN MAX 8.55 8.75 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50
INCHES MIN MAX 0.337 0.344 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0_ 7_ 0.228 0.244 0.010 0.019
SOLDERING FOOTPRINT*
7X
7.04 1 0.58
14X
14X
1.52
1.27 PITCH
DIMENSIONS: MILLIMETERS
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
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MC1488
PACKAGE DIMENSIONS
PDIP-14 CASE 646-06 ISSUE P
14
8
B
1 7
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. INCHES MIN MAX 0.715 0.770 0.240 0.260 0.145 0.185 0.015 0.021 0.040 0.070 0.100 BSC 0.052 0.095 0.008 0.015 0.115 0.135 0.290 0.310 --- 10 _ 0.015 0.039 MILLIMETERS MIN MAX 18.16 19.56 6.10 6.60 3.69 4.69 0.38 0.53 1.02 1.78 2.54 BSC 1.32 2.41 0.20 0.38 2.92 3.43 7.37 7.87 --- 10 _ 0.38 1.01
A F N -T-
SEATING PLANE
L C
H
G
D 14 PL
K
M
J M
DIM A B C D F G H J K L M N
0.13 (0.005)
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MC1488
PACKAGE DIMENSIONS
SOEIAJ-14 CASE 965-01 ISSUE A
14
8
LE Q1 E HE M_ L DETAIL P
1
7
Z D e A VIEW P
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS AND ARE MEASURED AT THE PARTING LINE. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 5. THE LEAD WIDTH DIMENSION (b) DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN EXCESS OF THE LEAD WIDTH DIMENSION AT MAXIMUM MATERIAL CONDITION. DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINIMUM SPACE BETWEEN PROTRUSIONS AND ADJACENT LEAD TO BE 0.46 ( 0.018). DIM A A1 b c D E e HE 0.50 LE M Q1 Z MILLIMETERS MIN MAX --- 2.05 0.05 0.20 0.35 0.50 0.10 0.20 9.90 10.50 5.10 5.45 1.27 BSC 7.40 8.20 0.50 0.85 1.10 1.50 10 _ 0_ 0.70 0.90 --- 1.42 INCHES MIN MAX --- 0.081 0.002 0.008 0.014 0.020 0.004 0.008 0.390 0.413 0.201 0.215 0.050 BSC 0.291 0.323 0.020 0.033 0.043 0.059 10 _ 0_ 0.028 0.035 --- 0.056
c
b 0.13 (0.005)
M
A1 0.10 (0.004)
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
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MC1488/D

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