MC3487N [TI]
QUADRUPLE DIFFERENTIAL LINE DRIVER; 四路差动线路驱动器
| 型号： | MC3487N |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | QUADRUPLE DIFFERENTIAL LINE DRIVER |
| 文件： | 总6页 (文件大小：102K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
D OR N PACKAGE
(TOP VIEW)
Meets or Exceeds Requirements of ANSI
EIA/TIA-422-B and ITU
Recommendation V.11
V
1A
1Y
1
2
3
4
5
6
7
8
16
15
14
13
CC
3-State, TTL-Compatible Outputs
Fast Transition Times
4A
4Y
4Z
1Z
High-Impedance Inputs
1,2EN
2Z
12 3,4EN
11 3Z
Single 5-V Supply
2Y
Power-Up and Power-Down Protection
10
9
3Y
3A
2A
Designed to Be Interchangeable With
Motorola MC3487
GND
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
logic diagram (positive logic)
4
1
7
4
1,2EN
EN
1,2EN
2
3
6
5
1Y
1Z
2Y
2Z
2
3
1A
1
1Y
1Z
1A
2A
6
5
7
2Y
2Z
2A
12
9
3,4EN
3A
EN
10
11
14
13
12
3Y
3Z
4Y
4Z
3,4EN
10
11
15
9
3Y
3Z
4A
3A
14
13
15
4Y
4Z
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
4A
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
FUNCTION TABLE
(each driver)
OUTPUTS
OUTPUT
ENABLE
INPUT
Y
H
L
Z
H
L
H
H
L
L
H
Z
X
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
V
CC
V
CC
Input
9 Ω NOM
Output
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 V
CC
Input voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
I
Output voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
O
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
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, V , are with respect to the network ground terminal.
OD
DISSIPATION RATING TABLE
T
≤ 25°C
DERATING FACTOR
T = 70°C
A
POWER RATING
A
PACKAGE
POWER RATING
ABOVE T = 25°C
A
D
N
950 mW
7.6 mW/°C
9.2 mW/°C
608 mW
1150 mW
736 mW
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
recommended operating conditions
MIN NOM
MAX
UNIT
V
Supply voltage, V
4.75
2
5
5.25
CC
High-level input voltage, V
V
IH
Low-level input voltage, V
0.8
70
V
IL
Operating free-air temperature, T
0
°C
A
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
Input clamp voltage
TEST CONDITIONS
MIN
2.5
2
MAX
UNIT
V
V
V
I = –18 mA
–1.5
V
V
V
IK
I
High-level output voltage
Low-level output voltage
Differential output voltage
Change in magnitude of
differential output voltage
Common-mode output voltage
Change in magnitude of
V
= 0.8 V,
= 0.8 V,
= 100 Ω,
V
V
= 2 V,
= 2 V,
I
I
= –20 mA
= 48 mA
OH
OL
IL
IL
IH
OH
V
0.5
IH
OL
|V
|
R
R
R
R
See Figure 1
See Figure 1
See Figure 1
See Figure 1
OD
L
L
L
L
∆|V
|
|
= 100 Ω,
= 100 Ω,
= 100 Ω,
±0.4
3
V
V
V
OD
†
‡
V
OC
∆|V
±0.4
OC
†
common-mode output voltage
V
O
V
O
V
O
V
O
= 6 V
100
–100
100
I
Output current with power off
V
= 0
µA
O
CC
= –0.25 V
= 2.7 V
= 0.5 V
I
I
High-impedance-state output current
Output enables at 0.8 V
V = 5.5 V
µA
µA
OZ
–100
Input current at maximum input volt-
age
100
I
I
I
I
I
High-level input current
Low-level input current
V = 2.7 V
50
µA
µA
IH
I
V = 0.5 V
I
–400
IL
§
Short-circuit output current
V = 2 V
I
–40 –140
mA
OS
Outputs disabled
Outputs enabled,
105
85
I
Supply current (all drivers)
mA
CC
No load
†
∆ |V
level.
| and ∆ |V
| are the changes in magnitude of V
OC
and V
OD
, respectively, that occur when the input is changed from a high level to a low
OC
OD
‡
§
In ANSI Standard EIA/TIA-422-B, V , which is the average of the two output voltages with respect to ground, is called output offset voltage,
OC
V
.
OS
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 , V
= 5 V
CC
PARAMETER
TEST CONDITIONS
MIN
MAX
20
20
6
UNIT
ns
t
t
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Skew time
PLH
PHL
C
C
= 15 pF,
See Figure 2
See Figure 3
ns
L
L
ns
t
t
t
t
t
Differential-output transition time
Output enable time to high level
Output enable time to low level
Output disable time from high level
Output disable time from low level
= 15 pF,
= 50 pF,
20
30
30
25
30
ns
t(OD)
PZH
PZL
ns
ns
C
See Figure 4
L
ns
PHZ
PLZ
ns
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
50 Ω
50 Ω
V
OD
V
OC
Figure 1. Differential and Common-Mode Output Voltages
3 V
0 V
1.5 V
1.5 V
Input
5 V
200 Ω
t
PHL
t
PLH
V
OH
SW1
1.5 V
1.5 V
Y Output
Generator
(see Note A)
V
50 Ω
OL
C
= 15 pF
Skew
t
Skew
L
(see Note B)
t
PLH
PHL
3 V
See Note C
V
OH
Z Output
1.5 V
1.5 V
V
OL
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: t ≤ 5 ns, t ≤ 5 ns, PRR ≤ 1 MHz, duty cycle = 50%,
r
f
Z
C
= 50 Ω.
O
L
B.
includes probe and stray capacitance.
C. All diodes are 1N916 or 1N3064.
Figure 2. Test Circuit and Voltage Waveforms
3 V
Input
C
R
= 100 Ω
L
L
0 V
t
Output
Generator
(see Note A)
t
t(OD)
t(OD)
50 Ω
3 V
90%
10%
Output
C
= 15 pF
L
(see Note B)
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: t ≤ 5 ns, t ≤ 5 ns, PRR ≤ 1 MHz, duty cycle = 50%,
r
f
Z
C
= 50 Ω.
O
L
B.
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
5 V
Output
200 Ω
SW3
SW1
0 V or 3 V
See Note C
SW2
1 kΩ
C
= 15 pF
L
Generator
(see Note A)
(see Note B)
50 Ω
TEST CIRCUIT
Output
Enable Input
Output
Enable Input
3 V
0 V
3 V
1.5 V
1.5 V
1.5 V
0 V
t
t
PHZ
PZL
SW1 Closed
SW2 Open
V
OH
0.5 V
0.5 V
SW1 Closed
SW2 Closed
≈ 1.5 V
Output
Output
Output
Output
V
OL
OH
t
PZH
t
PLZ
V
≈ 1.5 V
SW1 Closed
SW2 Closed
1.5 V SW1 Open
SW2 Closed
V
OL
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: t ≤ 5 ns, t ≤ 5 ns, PRR ≤ 1 MHz, duty cycle = 50%,
r
f
Z
C
= 50 Ω.
O
L
B.
includes probe and stray capacitance.
C. All diodes are 1N916 or 1N3064.
Figure 4. Driver Test Circuit and Voltage Waveforms
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
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Copyright 1998, Texas Instruments Incorporated
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