MC3487 QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A ± MAY 1980 ± REVISED MAY 1995
DMeets or Exceeds Requirements of ANSI EIA/TIA-422-B and ITU Recommendation V.11
D3-State, TTL-Compatible Outputs
DFast Transition Times
DHigh-Impedance Inputs
DSingle 5-V Supply
DPower-Up and Power-Down Protection
DDesigned to Be Interchangeable With Motorola MC3487
D OR N PACKAGE
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(TOP VIEW) |
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1A |
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VCC |
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1 |
16 |
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1Y |
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2 |
15 |
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4A |
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1Z |
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3 |
14 |
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4Y |
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1, 2EN |
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4 |
13 |
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4Z |
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2Z |
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5 |
12 |
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3, 4EN |
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2Y |
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6 |
11 |
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3Z |
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2A |
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7 |
10 |
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3Y |
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GND |
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8 |
9 |
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3A |
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description
The MC3487 offers four independent differential line drivers designed to meet the specifications of ANSI EIA/TIA-422-B and ITU Recommendation V.11. Each driver has a TTL-compatible input buffered to reduce current and minimize loading.
The driver outputs utilize 3-state circuitry to provide high-impedance states at any pair of differential outputs when the appropriate output enable is at a low logic level. Internal circuitry is provided to ensure a high-impedance state at the differential outputs during power-up and power-down transition times provided the output enable is low. The outputs are capable of source or sink currents of 48 mA.
The MC3487 is designed for optimum performance when used with the MC3486 quadruple line receiver. It is supplied in a 16-pin dual-in-line package and operates from a single 5-V supply.
The MC3487 is characterized for operation from 0°C to 70°C.
logic symbol²
4 |
EN |
1, 2EN |
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1 |
2 |
1Y |
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1A |
3 |
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1Z |
7 |
6 |
2Y |
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2A |
5 |
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2Z |
12 |
EN |
3, 4EN |
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9 |
10 |
3Y |
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3A |
11 |
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3Z |
15 |
14 |
4Y |
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4A |
13 |
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4Z |
²This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
4
1, 2EN
1 |
2 |
1Y |
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1A |
3 |
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1Z |
7 |
6 |
2Y |
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2A |
5 |
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2Z |
12
3, 4EN
9 |
10 |
3Y |
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3A |
11 |
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3Z |
15 |
14 |
4Y |
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4A |
13 |
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4Z |
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 1995, Texas Instruments Incorporated
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
1 |
MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A ± MAY 1980 ± REVISED MAY 1995
FUNCTION TABLE (each driver)
INPUT |
OUTPUT |
OUTPUTS |
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ENABLE |
Y |
Z |
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H |
H |
H |
L |
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L |
H |
L |
H |
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X |
L |
Z |
Z |
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H = TTL high level, L = TTL low level,
X = irrelevant, Z = High impedance
schematics of inputs and outputs
EQUIVALENT OF EACH INPUT |
TYPICAL OF ALL OUTPUTS |
VCC |
VCC |
Input
9 Ω NOM
Output
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)²
Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . |
. . . . . . . . . . . 8 |
V |
Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . |
. . . . . . . . 5.5 |
V |
Output voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . |
. . . . . . . . . 7 |
V |
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
See Dissipation Rating Table |
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Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . |
. . 0°C to 70°C |
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Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . |
±65°C to 150°C |
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Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or N package . . . . . . . . . |
. . . . . . . 260°C |
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²Stresses beyond those listed under ªabsolute maximum ratingsº may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values, except differential output voltage, VOD, are with respect to the network ground terminal.
DISSIPATION RATING TABLE
PACKAGE |
TA ≤ 25°C |
DERATING FACTOR |
TA = 70°C |
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POWER RATING |
ABOVE TA = 25°C |
POWER RATING |
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D |
950 mW |
7.6 mW/°C |
608 mW |
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N |
1150 mW |
9.2 mW/°C |
736 mW |
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2 |
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
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