MC3487N [TI]

QUADRUPLE DIFFERENTIAL LINE DRIVER; 四路差动线路驱动器
MC3487N
型号: MC3487N
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

QUADRUPLE DIFFERENTIAL LINE DRIVER
四路差动线路驱动器

线路驱动器或接收器 驱动程序和接口 接口集成电路 光电二极管 PC
文件: 总6页 (文件大小:102K)
中文:  中文翻译
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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 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 ,  
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 ,  
= 100 ,  
= 100 ,  
±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 .  
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 .  
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 .  
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  
IMPORTANT NOTICE  
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue  
any product or service without notice, and advise customers to obtain the latest version of relevant information  
to verify, before placing orders, that information being relied on is current and complete. All products are sold  
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those  
pertaining to warranty, patent infringement, and limitation of liability.  
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in  
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent  
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily  
performed, except those mandated by government requirements.  
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF  
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL  
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR  
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER  
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO  
BE FULLY AT THE CUSTOMER’S RISK.  
In order to minimize risks associated with the customer’s applications, adequate design and operating  
safeguards must be provided by the customer to minimize inherent or procedural hazards.  
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent  
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other  
intellectual property right of TI covering or relating to any combination, machine, or process in which such  
semiconductor products or services might be or are used. TI’s publication of information regarding any third  
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.  
Copyright 1998, Texas Instruments Incorporated  

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