SN75ALS121D-00 [TI]
DUAL LINE DRIVER, PDSO16;型号: | SN75ALS121D-00 |
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:85K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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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
V
1A
1B
1
2
3
4
5
6
7
8
16
15
14
CC
Lines
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
11
10
9
2B
2A
2Y
1F
Structure for Party-Line Operation
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
H
X
H
X
H
X
H
X
X
H
X
H
H
H
L
description
The SN75ALS121 dual line driver is designed for
digital data transmission over lines having
impedances from 50 to 500 Ω. It is compatible with
standard TTL logic and supply voltage levels.
All other input combinations
H = high level, L = low level, X = irrelevant
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
below approximately 1.5 V. All inputs are in conventional TTL configuration. Gating can be used during power-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.
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Copyright 1989, Texas Instruments Incorporated
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2−1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
ꢀꢁ ꢂ ꢃꢄ ꢅ ꢀꢆ ꢇ ꢆ
ꢈ ꢉ ꢄꢅꢊ ꢅ ꢋ ꢁꢌ ꢊꢈ ꢍꢋ ꢎ ꢌꢍ
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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
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
ꢀꢁꢂ ꢃꢄ ꢅꢀ ꢆꢇ ꢆ
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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
CC
4.75
2
5
5.25
High-level input voltage, V
IH
V
Low-level input voltage, V
IL
0.8
− 75
70
V
High-level output current, I
OH
mA
°C
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
CC
= 5 V and T = 25°C.
A
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
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
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ꢈ ꢉ ꢄꢅꢊ ꢅ ꢋ ꢁꢌ ꢊꢈ ꢍꢋ ꢎ ꢌꢍ
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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
CC
= 5 V and T = 25°C.
A
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
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
ꢀꢁꢂ ꢃꢄ ꢅꢀ ꢆꢇ ꢆ
ꢈꢉꢄ ꢅꢊꢅ ꢋ ꢁꢌ ꢊ ꢈꢍ ꢋ ꢎꢌ ꢍ
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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
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
2−6
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