UA9638CPE4 [TI]
双路高速差分线路驱动器 | P | 8 | 0 to 70;
| 型号： | UA9638CPE4 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 双路高速差分线路驱动器 | P | 8 | 0 to 70 驱动 光电二极管 接口集成电路 线路驱动器或接收器 驱动程序和接口 |
| 文件： | 总5页 (文件大小：80K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
uA9638C
DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER
SLLS112C – OCTOBER 1980 – REVISED APRIL 1994
D OR P PACKAGE
(TOP VIEW)
Meets or Exceeds ANSI Standard
EIA/TIA-422-B
Operates From a Single 5-V Power Supply
V
1Y
1Z
2Y
2Z
1
2
3
4
8
7
6
5
CC
1A
Drives Loads as Low as 50 Ω up
to 15 Mbps
2A
TTL- and CMOS-Input Compatibility
Output Short-Circuit Protection
GND
Interchangeable With National
Semiconductor 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
logic diagram
8
7
6
5
2
3
1Y
1Z
2Y
2Z
8
7
6
5
1A
1Y
1Z
2Y
2Z
2
3
1A
2A
2A
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
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.
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
uA9638C
DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER
SLLS112C – OCTOBER 1980 – REVISED APRIL 1994
schematics of inputs and outputs
EQUIVALENT OF EACH INPUT
TYPICAL OF ALL OUTPUTS
V
CC
V
CC
4 kΩ NOM
Input
9.6 Ω NOM
Output
GND
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
CC
Input voltage range, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
I
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 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
T
= 25°C
DERATING FACTOR
T = 70°C
A
POWER RATING
A
PACKAGE
POWER RATING
ABOVE T = 25°C
A
D
P
725 mW
5.8 mW/°C
8.0 mW/°C
464 mW
1000 mW
640 mW
recommended operating conditions
MIN NOM
4.75
MAX
UNIT
V
Supply voltage, V
CC
High-level input voltage, V
5
5.25
2
V
IH
Low-level input voltage, V
0.8
–50
50
V
IL
High-level output current, I
mA
mA
°C
OH
Low-level output current, I
OL
Operating free-air temperature, T
0
70
A
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
uA9638C
DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER
SLLS112C – OCTOBER 1980 – REVISED APRIL 1994
electrical characteristics over operating free-air temperature range (unless otherwise noted)
†
PARAMETER
Input clamp voltage
TEST CONDITIONS
MIN TYP
MAX
UNIT
V
V
V
CC
= 4.75 V, I = –18 mA
–1
–1.2
V
IK
I
I
I
= –10 mA
= –40 mA
= 0.8 V,
2.5
2
3.5
V
V
= 4.75 V,
= 0.8 V
V
= 2 V,
OH
CC
IL
IH
High-level output voltage
Low-level output voltage
V
V
OH
OH
V
I
= 4.75 V,
= 40 mA
V
IH
= 2 V,
V
IL
CC
V
OL
0.5
OL
|V
|V
|
|
Magnitude of differential output voltage
Magnitude of differential output voltage
V
CC
= 5.25 V,
I
O
= 0
2V
V
V
OD1
OD2
2
OD2
Change in magnitude of differential
∆|V
|
±0.4
3
V
V
V
OD
‡
output voltage
Common-mode output voltage
Change in magnitude of common-mode
V
= 4.75 V to 5.25 V,
R
= 100 Ω,
CC
L
§
See Figure 1
V
OC
∆|V
|
±0.4
OC
‡
output voltage
V
V
V
= 6 V
0.1
100
O
O
O
I
Output current with power off
V
= 0
= – 0.25 V
–0.1 –100
±100
50
µA
O
CC
= – 0.25 V to 6 V
I
I
I
I
I
Input current
V
CC
V
CC
V
CC
V
CC
V
CC
= 5.25 V, V = 5.5 V
µA
µA
I
I
High-level input current
Low-level input current
= 5.25 V, V = 2.7 V
25
IH
IL
I
= 5.25 V, V = 0.5 V
–200
–150
µA
I
¶
= 5.25 V,
V
O
= 0
–50
mA
mA
Short-circuit output current
OS
CC
Supply current (both drivers)
= 5.25 V, No load,
All inputs at 0 V
45
65
†
‡
All typical values are at V
= 5 V and T = 25°C.
A
CC
| are the changes in magnitude of V and V
OD
∆| V
| and ∆| V
, respectively, that occur when the input is changed from a high level to a
OC
OD
OC
low level or vice versa.
§
¶
In Standard EIA-422-A, V
, which is the average of the two output voltages with respect to ground, is called output offset voltage, V
OC
.
OS
Only one output at a time should be shorted, and duration of the short circuit should not exceed one second.
switching characteristics, V
= 5 V, T = 25°C
A
CC
PARAMETER
TEST CONDITIONS
= 100 Ω, See Figure 2
MIN
TYP
10
10
1
MAX
20
UNIT
ns
t
t
t
Differential output delay time
d(OD)
t(OD)
sk(o)
C
= 15 pF,
R
L
L
Differential output transition time
Output skew
20
ns
See Figure 2
ns
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
uA9638C
DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER
SLLS112C – OCTOBER 1980 – REVISED APRIL 1994
PARAMETER MEASUREMENT INFORMATION
50 Ω
50 Ω
V
OD2
Input
V
OC
Figure 1. Differential and Common-Mode Output Voltages
3 V
0 V
Input
1.5 V
1.5 V
t
t
d(OD)
d(OD)
Y Output
Differential
Output
90%
90%
C
L
10%
t(OD)
10%
R
= 100 Ω
L
Generator
t
t
t(OD)
(see Note A)
50 Ω
Z Output
V
OH
C
= 15 pF
Y Output
Z Output
L
50%
50%
(see Note B)
V
V
OL
t
t
sk(o)
sk(o)
OH
50%
50%
V
OL
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The input pulse generator has the following characteristics: Z = 50 Ω, PRR ≤ 500 kHz, t = 100 ns, t = ≤ 5 ns.
O
w
r
B.
C includes probe and jig capacitance.
L
Figure 2. Test Circuit and Voltage Waveforms
4
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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