SN75ALS121D [TI]
DUAL LINE DRIVER, PDSO16;
| 型号： | SN75ALS121D |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | DUAL LINE DRIVER, PDSO16 驱动 光电二极管 接口集成电路 驱动器 |
| 文件： | 总7页 (文件大小：75K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN75ALS121
DUAL LINE DRIVER
SLLS030A – D1334, SEPTEMBER 1987 – REVISED AUGUST 1989
D OR N PACKAGE
(TOP VIEW)
•
•
Permits Digital Data Transmission Over
Coaxial Cable, Strip Line, or Twisted Pair
Operates With 50-Ω to 500-Ω Transmission
Lines
V
1A
1B
1
2
3
4
5
6
7
8
16
15
14
CC
2F
2E
•
•
•
TTL Compatible With 5-V Supply
1C
2.4-V Output at I
= –75 mA
13 2D
12 2C
1D
OH
1E
Uncommitted Emitter-Follower Output
Structure for Party-Line Operation
11
10
9
2B
2A
2Y
1F
1Y
•
•
IMPACT Low-Power Schottky Technology
GND
Improved Replacement for the SN75121
and Signetics 8T13
•
•
•
•
Glitchless Power Up/Power Down
Short-Circuit Protection
NOT RECOMMENDED FOR NEW DESIGN
AND-OR Logic Configuration
High Speed . . . Maximum Propagation
FUNCTION TABLE
INPUTS
OUTPUT
Y
Delay Time of 14 ns at C = 15 pF
L
A
B
C
D
E
F
description
H
X
H
X
H
X
H
X
X
H
X
H
H
H
L
The SN75ALS121 dual line driver is designed for
All other input combinations
H = high level, L = low level, X = irrelevant
digital data transmission over lines having
impedances from 50 to 500 Ω. It is compatible with
standard TTL logic and supply voltage levels.
The low-impedance emitter-follower outputs drive terminated lines such as coaxial cable, strip line, or twisted
pair. Having the outputs uncommitted allows wired-OR logic to be performed in party-line applications. Output
short-circuit protection is provided by an internal clamping network that turns on when the output voltage drops
belowapproximately1.5V. AllinputsareinconventionalTTLconfiguration. Gatingcanbeusedduringpower-up
and power-down sequences to ensure that no noise is introduced on the line.
The SN75ALS121 employs the IMPACT process to achieve fast switching speeds, low power dissipation, and
reduced input current requirements.
The SN75ALS121 is characterized for operation from 0°C to 70°C.
IMPACT is a trademark of Texas Instruments Incorporated.
Copyright 1989, 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.
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS121
DUAL LINE DRIVER
SLLS030A – D1334, SEPTEMBER 1987 – REVISED AUGUST 1989
†
logic symbol
logic diagram (positive logic)
1
&
&
≥ 1
1A
1B
1C
1D
1
2
3
4
1A
1B
1C
1D
2
3
7
7
1Y
1Y
4
5
1E
5
1E
1F
6
1F
6
10
11
2A
2B
2C
2D
2E
2F
10
2A
11
2B
2C
2D
12
13
12
13
9
2Y
9
2Y
14
14
15
2E
15
2F
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
schematics of inputs and outputs
EQUIVALENT OF EACH INPUT
TYPICAL OF ALL OUTPUTS
V
CC
V
CC
25 kΩ
17 Ω
Input
GND
Y Output
GND
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS121
DUAL LINE DRIVER
SLLS030A – D1334, SEPTEMBER 1987 – REVISED AUGUST 1989
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
CC
Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Continuous total dissipation at (or below) 25°C free air temperature . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
NOTE 1: All voltage values are with respect to network ground terminal.
DISSIPATION RATING TABLE
T
≤ 25°C
OPERATING 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
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
– 75
70
V
IL
High-level output current, I
mA
°C
OH
Operating free-air temperature range, T
0
A
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
†
PARAMETER
Input clamp voltage
TEST CONDITIONS
I = –12 mA
MIN
MAX
UNIT
TYP
V
V
V
V
V
V
V
= 5 V,
= 5 V,
– 1.5
V
V
V
IK
CC
I
Input breakdown voltage
High-level output voltage
I = 10 mA
I
5.5
2.4
(BR)I
OH
CC
= 2 V,
I
= –75 mA,
See Note 2
V = 2 V,
OH
3.2
IH
OH
= 5 V,
= 25°C,
V
= 4.5 V,
CC
IH
I
High-level output current
– 100 – 200 – 250
mA
OH
T
A
See Note 2
I
I
I
I
I
I
I
Low-level output current
Off-state output current
High-level input current
Low-level input current
V
V
= 0.8 V,
V
V
= 0.4 V,
See Note 2
– 800
500
µA
µA
OL
IL
OL
= 3 V
O
= 3 V,
O(off)
IH
CC
V = 4.5 V
I
40
µA
V = 0.4 V
I
– 250
µA
IL
Short-circuit output current
Supply current, outputs high
Supply current, outputs low
V
CC
V
CC
V
CC
= 5 V
– 5
9
– 30
14
mA
mA
mA
OS
= 5.25 V,
= 5.25 V,
All inputs at 2 V,
No load
No load
CCH
CCL
All inputs at 0.8 V,
13
30
†
All typical values are at V
= 5 V and T = 25°C.
A
CC
NOTE 2: The output voltage and current limits are ensured for any appropriate combination of high and low inputs specified by the function table
for the desired output.
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS121
DUAL LINE DRIVER
SLLS030A – D1334, SEPTEMBER 1987 – REVISED AUGUST 1989
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature
PARAMETER
TEST CONDITIONS
MIN
TYP
6
MAX
14
UNIT
ns
t
t
t
t
Propagation delay time, low-to-high-level output
Propagation delay time, high-to-low-level output
Propagation delay time, low-to-high-level output
Propagation delay time, high-to-low-level output
PLH
PHL
PLH
PHL
R
R
= 37 Ω,
= 37 Ω,
C
C
= 15 pF,
See Figure 1
L
L
L
L
4
14
ns
18
29
30
ns
= 1000 pF, See Figure 1
50
ns
†
All typical values are at V
= 5 V and T = 25°C.
A
CC
PARAMETER MEASUREMENT INFORMATION
3 V
V
CC
Pulse
Generator
(see Note A)
Output
R
C
L
L
(see Note B)
TEST CIRCUIT
≤ 5 ns
≤ 5 ns
3 V
0 V
90%
1.5 V
90%
1.5 V
Input
10%
10%
t
PLH
t
PHL
V
V
OH
Output
1.5 V
1.5 V
OL
VOLTAGE WAVEFORMS
NOTES: A. The pulse generator has the following characteristics: Z = 50 Ω, t = 200 ns, duty cycle = 50%.
O
w
B. C includes probe and jig capacitance.
L
Figure 1. Test Circuit and Voltage Waveforms
2–4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS121
DUAL LINE DRIVER
SLLS030A – D1334, SEPTEMBER 1987 – REVISED AUGUST 1989
TYPICAL CHARACTERISTICS
OUTPUT CURRENT
vs
OUTPUT VOLTAGE
– 300
– 250
– 200
– 150
– 100
– 50
V
= 5 V
CC
All inputs at 2 V
T
A
= 25 °C
0
0
1
2
3
4
5
V
O
– Output Voltage – V
Figure 2
2–5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–6
IMPORTANT NOTICE
Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor
product or service without notice, and advises its customers to obtain the latest version of relevant information
to verify, before placing orders, that the information being relied on is current and complete.
TI warrants performance of its semiconductor products and related software 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, INTENDED, AUTHORIZED, OR WARRANTED
TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS.
Inclusion of TI products in such applications is understood to be fully at the risk of the customer. Use of TI
products in such applications requires the written approval of an appropriate TI officer. Questions concerning
potential risk applications should be directed to TI through a local SC sales office.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards should be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein. Nor does TI 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.
Copyright 1998, Texas Instruments Incorporated
相关型号：
©2020 ICPDF网 联系我们和版权申明