TI MC3487N Quadruple differential line driver Datasheet

MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
D
D
D
D
D
D
D
D OR N PACKAGE
(TOP VIEW)
Meets or Exceeds Requirements of ANSI
EIA/TIA-422-B and ITU
Recommendation V.11
3-State, TTL-Compatible Outputs
Fast Transition Times
High-Impedance Inputs
Single 5-V Supply
Power-Up and Power-Down Protection
Designed to Be Interchangeable With
Motorola MC3487
1A
1Y
1Z
1, 2EN
2Z
2Y
2A
GND
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
VCC
4A
4Y
4Z
3, 4EN
3Z
3Y
3A
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 symbol†
1, 2EN
1A
2A
4
logic diagram (positive logic)
EN
1, 2EN
2
1
3
6
7
5
1Y
1Z
1A
3A
4A
12
2
1
3
2Y
2Z
2A
3, 4EN
4
6
7
5
1Y
1Z
2Y
2Z
EN
9
15
10
11
14
13
3Y
3, 4EN
12
3Z
4Y
4Z
† This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
3A
4A
10
9
11
15
14
13
3Y
3Z
4Y
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.
Copyright  1995, Texas Instruments Incorporated
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
FUNCTION TABLE
(each driver)
OUTPUTS
INPUT
OUTPUT
ENABLE
Y
H
H
H
L
L
H
L
H
X
L
Z
Z
Z
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)†
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
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or N package . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under “absolute maximum ratings” 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 “recommended operating conditions” 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
2
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
D
950 mW
7.6 mW/°C
608 mW
N
1150 mW
9.2 mW/°C
736 mW
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
recommended operating conditions
Supply voltage, VCC
MIN
NOM
MAX
UNIT
4.75
5
5.25
V
High-level input voltage, VIH
2
V
Low-level input voltage, VIL
Operating free-air temperature, TA
0
0.8
V
70
°C
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VIK
VOH
Input clamp voltage
VOL
|VOD|
Low-level output voltage
Differential output voltage
VIL = 0.8 V,
RL = 100 Ω,
∆|VOD|
Change
of
g in magnitude
g
differential output voltage†
Ω
RL = 100 Ω,
VOC
Common-mode output voltage‡
∆|VOC|
Change
g in magnitude
g
of
common-mode output voltage†
IO
High-level output voltage
II = – 18 mA
VIL = 0.8 V,
VIH = 2 V,
VIH = 2 V,
MIN
IOH = – 20 mA
IOL = 48 mA
MAX
UNIT
– 1.5
V
2.5
V
0.5
V
See Figure 1
04
± 0.4
V
RL = 100 Ω,
See Figure 1
3
V
RL = 100 Ω,
Ω
See Figure 1
± 0.4
04
V
Output current with power off
VCC = 0
VO = 6 V
VO = – 0.25 V
100
– 100
IOZ
High impedance state output current
High-impedance-state
Output enables at 0
0.8
8V
VO = 2.7 V
VO = 0.5 V
– 100
II
Input current at maximum input voltage
VI = 5.5 V
100
µA
VI = 2.7 V
VI = 0.5 V
50
µA
IIH
IIL
High-level input current
IOS
Short-circuit output current §
ICC
Supply current (all drivers)
Low-level input current
See Figure 1
2
100
VI = 2 V
Outputs disabled
Outputs enabled,
– 40
µA
– 400
µA
– 140
mA
105
No load
µA
85
mA
† ∆ |VOD| and ∆ |VOC| are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a low
level.
‡ In ANSI Standard EIA/TIA-422-B, VOC, which is the average of the two output voltages with respect to ground, is called output offset voltage,
VOS.
§ Only one output at a time should be shorted, and duration of the short circuit should not exceed one second.
switching characteristics over recommended operating free-air temperature range , VCC = 5 V
PARAMETER
tPLH
tPHL
TEST CONDITIONS
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
CL = 15 pF,
See Figure 2
Skew time
CL = 15 pF,
MAX
UNIT
20
ns
20
ns
6
ns
tt(OD)
tPZH
Differential-output transition time
20
ns
Output enable time to high level
30
ns
tPZL
tPHZ
Output enable time to low level
30
ns
25
ns
tPLZ
Output disable time from low level
30
ns
CL = 50 pF
F,
Output disable time from high level
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• DALLAS, TEXAS 75265
See Figure 3
MIN
See Figure 4
3
MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
50 Ω
VOD
50 Ω
VOC
Figure 1. Differential and Common-Mode Output Voltages
3V
1.5 V
Input
5V
SW1
Generator
(see Note A)
200 Ω
1.5 V
tPHL
tPLH
0V
VOH
1.5 V
Y Output
1.5 V
50 Ω
VOL
CL = 15 pF
(see Note B)
3V
ÏÏ
Skew
tPHL
tPLH
See Note C
Z Output
Skew
1.5 V
VOH
1.5 V
VOL
VOLTAGE WAVEFORMS
TEST CIRCUIT
NOTES: A. The input pulse is supplied by a generator having the following characteristics: tr ≤ 5 ns, tf ≤ 5 ns, PRR ≤ 1 MHz, duty cycle = 50%,
ZO = 50 Ω.
B. CL includes probe and stray capacitance.
C. All diodes are 1N916 or 1N3064.
Figure 2. Test Circuit and Voltage Waveforms
3V
CL
Generator
(see Note A)
RL = 100 Ω
Output
Input
0V
tt(OD)
tt(OD)
50 Ω
90%
Output
3V
10%
CL = 15 pF
(see Note B)
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: tr ≤ 5 ns, tf ≤ 5 ns, PRR ≤ 1 MHz, duty cycle = 50%,
ZO = 50 Ω.
B. CL includes probe and stray capacitance.
Figure 3. Test Circuit and Voltage Waveforms
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
5V
Output
SW3
200 Ω
SW1
0 V or 3 V
Generator
(see Note A)
1 kΩ
CL = 15 pF
(see Note B)
50 Ω
See Note C
SW2
TEST CIRCUIT
Output
Enable Input
Output
Enable Input
3V
1.5 V
tPHZ
0V
tPZL
0V
VOH
SW1 Closed
SW2 Closed
≈ 1.5 V
≈ 1.5 V
SW1 Closed
0.5 V SW2 Closed
VOL
3V
1.5 V
0.5 V
Output
tPLZ
Output
1.5 V
Output
VOL
tPZH
Output
SW1 Closed
SW2 Open
1.5 V
VOH
SW1 Open
SW2 Closed
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: tr ≤ 5 ns, tf ≤ 5 ns, PRR ≤ 1 MHz, duty cycle = 50%,
ZO = 50 Ω.
B. CL includes probe and stray capacitance.
C. All diodes are 1N916 or 1N3064.
Figure 4. Driver Test Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
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