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Электронный компонент: uA9638CD

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uA9638C
DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER
SLLS112C OCTOBER 1980 REVISED APRIL 1994
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Meets or Exceeds ANSI Standard
EIA / TIA-422-B
D
Operates From a Single 5-V Power Supply
D
Drives Loads as Low as 50
up
to 15 Mbps
D
TTL- and CMOS-Input Compatibility
D
Output Short-Circuit Protection
D
Interchangeable With National
Semiconductor
TM
DS9638
description
The uA9638C is a dual high-speed differential line driver designed to meet ANSI Standard EIA / TIA-422-B. The
inputs are TTL and CMOS compatible and have input clamp diodes. Schottky-diode-clamped transistors are
used to minimize propagation delay time. This device operates from a single 5-V power supply and is supplied
in an 8-pin package.
The uA9638 provides the current needed to drive low-impedance loads at high speeds. Typically used with
twisted-pair cabling and differential receiver(s), base-band data transmission can be accomplished up to and
exceeding 15 Mbps in properly designed systems. The uA9637A dual line receiver is commonly used as the
receiver. For even faster switching speeds in the same pin configuration, see the SN75ALS191.
The uA9638C is characterized for operation from 0
C to 70
C.
logic symbol
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
2A
1A
5
6
7
8
2Z
2Y
1Z
1Y
3
2
logic diagram
2Z
2Y
1Z
1Y
3
2
2A
1A
5
6
7
8
Copyright
1994, 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.
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.
National Semiconductor is a trademark of National Semiconductor Corporation.
1
2
3
4
8
7
6
5
V
CC
1A
2A
GND
1Y
1Z
2Y
2Z
D OR P PACKAGE
(TOP VIEW)
uA9638C
DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER
SLLS112C OCTOBER 1980 REVISED APRIL 1994
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
schematics of inputs and outputs
VCC
EQUIVALENT OF EACH INPUT
TYPICAL OF ALL OUTPUTS
Input
4 k
NOM
VCC
Output
GND
9.6
NOM
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
(see Note 1)
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation
See Dissipation Rating Table
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
0
C to 70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from 10 seconds
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: Voltage values except differential output voltages are with respect to network GND.
DISSIPATION RATING TABLE
PACKAGE
TA = 25
C
DERATING FACTOR
TA = 70
C
PACKAGE
A
POWER RATING
ABOVE TA = 25
C
A
POWER RATING
D
725 mW
5.8 mW/
C
464 mW
P
1000 mW
8.0 mW/
C
640 mW
recommended operating conditions
MIN
NOM
MAX
UNIT
Supply voltage, VCC
4.75
5
5.25
V
High-level input voltage, VIH
2
V
Low-level input voltage, VIL
0.8
V
High-level output current, IOH
50
mA
Low-level output current, IOL
50
mA
Operating free-air temperature, TA
0
70
C
uA9638C
DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER
SLLS112C OCTOBER 1980 REVISED APRIL 1994
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIK
Input clamp voltage
VCC = 4.75 V, II = 18 mA
1
1.2
V
VOH
High level output voltage
VCC = 4.75 V, VIH = 2 V,
IOH = 10 mA
2.5
3.5
V
VOH
High-level output voltage
CC
,
VIL = 0.8 V
IH
,
IOH = 40 mA
2
V
VOL
Low level output voltage
VCC = 4.75 V, VIH = 2 V,
VIL = 0.8 V,
0 5
V
VOL
Low-level output voltage
CC
,
IOL = 40 mA
IH
,
IL
,
0.5
V
|VOD1|
Magnitude of differential output voltage
VCC = 5.25 V, IO = 0
2VOD2
V
|VOD2|
Magnitude of differential output voltage
2
V
|VOD|
Change in magnitude of differential
0 4
V
|VOD|
Change in magnitude of differential
output voltage
VCC = 4.75 V to 5.25 V,
RL = 100
,
0.4
V
VOC
Common-mode output voltage
CC
,
See Figure 1
L
,
3
V
|VOC|
Change in magnitude of common-mode
0 4
V
|VOC|
Change in magnitude of common mode
output voltage
0.4
V
VO = 6 V
0.1
100
IO
Output current with power off
VCC = 0
VO = 0.25 V
0.1
100
A
VO = 0.25 V to 6 V
100
II
Input current
VCC = 5.25 V, VI = 5.5 V
50
A
IIH
High-level input current
VCC = 5.25 V, VI = 2.7 V
25
A
IIL
Low-level input current
VCC = 5.25 V, VI = 0.5 V
200
A
IOS
Short-circuit output current
VCC = 5.25 V, VO = 0
50
150
mA
ICC
Supply current (both drivers)
VCC = 5.25 V, No load,
All inputs at 0 V
45
65
mA
All typical values are at VCC = 5 V and TA = 25
C.
| 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 or vice versa.
In Standard EIA-422-A, 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, V
CC
= 5 V, T
A
= 25
C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
td(OD)
Differential output delay time
CL = 15 pF
RL = 100
See Figure 2
10
20
ns
tt(OD)
Differential output transition time
CL = 15 pF,
RL = 100
,
See Figure 2
10
20
ns
tsk(o)
Output skew
See Figure 2
1
ns
uA9638C
DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER
SLLS112C OCTOBER 1980 REVISED APRIL 1994
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
50
VOC
50
Input
VOD2
Figure 1. Differential and Common-Mode Output Voltages
Differential
Output
td(OD)
TEST CIRCUIT
Z Output
CL = 15 pF
(see Note B)
50
VOLTAGE WAVEFORMS
Input
1.5 V
3 V
tt(OD)
0 V
td(OD)
10%
10%
90%
90%
Y Output
RL = 100
CL
1.5 V
tt(OD)
VOL
50%
VOL
50%
tsk(o)
tsk(o)
Y Output
Z Output
VOH
VOH
Generator
(see Note A)
50%
50%
NOTES: A. The input pulse generator has the following characteristics: ZO = 50
, PRR
500 kHz, tw = 100 ns, tr =
5 ns.
B. CL includes probe and jig capacitance.
Figure 2. Test Circuit and Voltage Waveforms
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pertaining to warranty, patent infringement, and limitation of liability.
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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.
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Copyright
1998, Texas Instruments Incorporated