SN55138_14 [TI]
QUADRUPLE BUS TRANSCEIVERS;
| 型号： | SN55138_14 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | QUADRUPLE BUS TRANSCEIVERS |
| 文件： | 总13页 (文件大小：245K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
SN55138 . . . J OR W PACKAGE
SN75138 . . . D OR N PACKAGE
Single 5-V Supply
High-Input-Impedance, High-Threshold
Receivers
(TOP VIEW)
Common Driver Strobe
1
2
3
4
5
6
7
8
16
V
CC
15 4B
GND
1B
TTL-Compatible Driver and Strobe Inputs
With Clamp Diodes
14
13
12
11
10
9
4R
4D
S
1R
1D
High-Speed Operation
2D
100-mA Open-Collector Driver Outputs
Four Independent Channels
TTL-Compatible Receiver Output
3D
3R
3B
2R
2B
GND
description
SN55138 . . . FK PACKAGE
(TOP VIEW)
The SN55138 and SN75138 quadruple bus
transceivers are designed for two-way data
communication over single-ended transmission
lines. Each of the four identical channels consists
of a driver with TTL inputs and a receiver with a
TTL output. The driver open-collector output is
designed to handle loads up to 100-mA open
collector. The receiver input is internally
connected to the driver output, and has a high
impedance to minimize loading of the
transmission line. Because of the high driver-
output current and the high receiver-input
impedance, a very large number (typically
hundreds) of transceivers may be connected to a
single data bus.
3
2
1
20 19
18
4R
4D
NC
S
1R
1D
NC
2D
2R
4
5
6
7
8
17
16
15
14
3D
9 10 11 12 13
NC – No internal connection
The receiver design also features a threshold of 2.3 V (typical), providing a wider noise margin than would be
possible with a receiver having the usual TTL threshold. A strobe turns off all drivers (high impedance) but does
not affect receiver operation. These circuits are designed for operation from a single 5-V supply and include a
provision to minimize loading of the data bus when the power-supply voltage is zero.
The SN55138 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN75138 is characterized for operation from 0°C to 70°C.
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
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
Function Tables
TRANSMITTING
INPUTS
OUTPUTS
S
D
H
L
B
L
R
H
L
L
L
H
RECEIVING
INPUTS
OUTPUT
R
S
H
H
B
H
L
D
X
X
L
H
H=highlevel, L=lowlevel, X=irrelevant
†
logic symbol
logic diagram (positive logic)
12
12
S
S
EN2
2
7
2
7
4
3
1B
2B
3B
4B
4
1D
1B
2B
3B
4B
2
1D
1R
3
1
1R
5
2D
5
6
6
2R
2D
2R
9
11
3D
10
3R
9
15
11
10
13
4D
3D
3R
14
4R
15
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Pin numbers shown are for D, J, N, and W packages.
13
14
4D
4R
schematics of inputs and outputs
EQUIVALENT OF EACH
STROBE AND DRIVER INPUT
EQUIVALENT OF
EACH RECEIVER INPUT
TYPICAL OF ALL
DRIVER OUTPUTS
TYPICAL OF ALL
RECEIVER OUTPUTS
V
CC
V
CC
V
CC
130 Ω NOM
4 kΩ NOM
Output
Input
Input
2 kΩ NOM
Output
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
†
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
I
Driver off-state output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Low-level output current into the driver output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 mA
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, T : SN55138 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
A
SN75138 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, T
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D, N, or W package . . . . . . . . . . . . . 260°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
Case temperature for 60 seconds, T : FK package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
C
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package . . . . . . . . . . . . . . . . . . . . . 300°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 are with respect to both ground terminals connected together.
DISSIPATION RATING TABLE
T
≤ 25°C
DERATING FACTOR
T
= 70°C
T = 125°C
A
A
A
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING POWER RATING
A
D
950 mW
7.6 mW/°C
11.0 mW/°C
11.0 mW/°C
9.2 mW/°C
8.0 mW/°C
608 mW
880 mW
880 mW
736 mW
640 mW
—
‡
FK
1375 mW
275 mW
275 mW
—
‡
J
1375 mW
N
1150 mW
W
1000 mW
200 mW
‡
In the FK and J packages, the SN55138 chip is alloy mounted.
recommended operating conditions
SN55138
SN75138
MIN NOM
UNIT
V
MIN NOM
MAX
MAX
Supply voltage, V
4.5
2
5.5
4.75
2
5
5.25
CC
Driver or strobe
Receiver
High-level input voltage, V
V
IH
3.2
2.9
Driver or strobe
Receiver
0.8
1.5
0.8
1.8
Low-level input voltage, V
V
IL
High-level output current, I
Receiver output
Driver output
Receiver output
–400
100
16
–400
100
16
µA
mA
°C
OH
Low-level output current, I
OL
Operating free-air temperature, T
–55
125
0
70
A
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN55138
SN75138
†
PARAMETER
UNIT
TEST CONDITIONS
‡
‡
MIN TYP
MAX
MIN TYP
MAX
Input clamp
voltage
Driver or
strobe
V
V
V
= MIN,
= MIN,
I = –12 mA
–1.5
–1.5
V
IK
CC
I
High-level
output
voltage
V
V
V
= 2 V,
CC
IL(R)
IH(S)
I = –400 µA
OH
Receiver
2.4
3.5
2.4
3.5
V
V
OH
= V max,
IL
V
V
= MIN,
= 0.8 V,
V
= 2 V,
CC
IL(S)
IH(D)
I = 100 mA
OL
Driver
0.45
0.4
0.45
0.4
Low-level
output
voltage
V
OL
V
V
= MIN,
= 2 V,
V
= V
min,
IH
CC
IH(S)
IH(R)
I = 16 mA
OL
Receiver
Input current
Driver or
strobe
I (max) at maximum
I
V
= MAX,
= MAX,
V = V
CC
1
1
mA
µA
CC
CC
I
input voltage
Driver or
strobe
V
V = 2.4 V
I
40
300
40
300
High-level
input current
I
I
IH
V
V
= 5 V,
= 2 V
V
I(R)
= 4.5 V,
CC
I(S)
Receiver
25
–1
25
–1
Driver or
strobe
V
CC
= MAX,
V = 0.4 V
I
–1.6
–50
–1.6
–50
mA
Low-level
input current
IL
V
V
= MAX,
= 2 V
V
I(R)
= 0.45 V,
CC
I(S)
Receiver
Receiver
µA
Input current
with power
off
I
I
V
= 0,
V = 4.5 V
1.1
1.5
1.1
1.5
mA
mA
I(off)
CC
CC
I
Short-circuit
output
Receiver
V
= MAX
–20
–55
65
–18
–55
65
OS
§
current
All driver
outputs low
V
V
= MAX,
= 0.8 V
V
V
= 2 V,
CC
I(S)
I(D)
50
42
50
42
Supply
current
I
mA
CC
All driver
outputs
high
V
V
= MAX,
= 2 V,
= 3.5 V,
CC
I(S)
I(R)
55
55
Receiver outputs open
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. Parenthetical letters D,
R, and S used with V refer to the driver input, receiver input, and strobe input, respectively.
I
‡
§
All typical values are at V
= 5 V, T = 25°C.
A
CC
Not more than one output should be shorted at a time.
switching characteristics, V
= 5 V, T = 25°C
CC
A
FROM
(INPUT)
TO
(OUTPUT)
¶
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ns
PARAMETER
t
t
t
t
t
t
15
14
18
22
7
24
24
28
32
15
15
PLH
PHL
PLH
PHL
PLH
PHL
Driver
Driver
C
C
= 50 pF,
= 15 pF
R
R
= 50 Ω,
See Figure 1
L
L
L
L
Strobe
Driver
ns
Receiver
Receiver
= 400 Ω, See Figure 2
ns
8
¶
t
t
= propagation delay time, low- to high-level output
= propagation delay time, high- to low-level output
PLH
PHL
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
V
CC
R
L
From Output
Under Test
Test Point
C
L
(see Note B)
TEST CIRCUIT
Driver
Input
3 V
0 V
See Note D
1.5 V
1.5 V
Strobe
Input
t
t
PHL
PLH
V
OH
OL
2.5 V
2.5 V
Driver
Output
V
VOLTAGE WAVEFORMS
NOTES: A. Input pulses are supplied by generators having the following characteristics: t = 100 ns, PRR ≤ 1 MHz, t ≤ 10 ns, t ≤ 10 ns,
w
r
f
Z
C
≈ 50 Ω.
O
L
B.
includes probe and jig capacitance.
C. All diodes are 1N916 or 1N3064.
D. When testing driver input (solid line) strobe must be low; when testing strobe input (dashed line) driver input must be high.
Figure 1. Propagation Delay Times From Data and Strobe Inputs
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
Test
Point
V
CC
R
L
From Output
Under Test
See Note C
C
L
(see Note B)
TEST CIRCUIT
4 V
0 V
Receiver
2.5 V
2.5 V
Input
t
t
PHL
PLH
V
OH
OL
Receiver
Output
1.5 V
1.5 V
V
VOLTAGE WAVEFORMS
NOTES: A. Input pulses are supplied by generators having the following characteristics: t = 100 ns, PRR ≤ 1 MHz, t ≤ 10 ns, t ≤ 10 ns,
w
r
f
Z
C
≈ 50 Ω.
O
L
B.
includes probe and jig capacitance.
C. All diodes are 1N916 or 1N3064.
D. When testing driver input (solid line) strobe must be low; when testing strobe input (dashed line) driver input must be high.
Figure 2. Propagation Delay Times From Receiver Input
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
†
TYPICAL CHARACTERISTICS
DRIVER TRANSFER CHARACTERISTICS
DRIVER TRANSFER CHARACTERISTICS
6
5
4
3
2
1
0
6
5
4
3
2
1
0
V
V
= 5.5 V
= 5 V
CC
V
V
= 5 V
V
T
= 0.8 V
CC
I(S)
= 25°C
CC
= 0.8 V
I(S)
A
Load = 50 Ω to V
V
CC
= 4.5 V
CC
T
= 25°C
A
T
A
= 125°C
T
= –55°C
A
0
1
2
3
4
0
1
2
3
4
V
I(D)
– Driver Input Voltage – V
V
I(D)
– Driver Input Voltage – V
Figure 3
Figure 4
STROBE-TO-DRIVER OUTPUT
TRANSFER CHARACTERISTICS
STROBE-TO-DRIVER OUTPUT
TRANSFER CHARACTERISTICS
6
6
V
= 5.5 V
= 5 V
CC
CC
V
5
4
3
2
1
0
5
4
3
2
1
0
T
A
= 125°C
V
= 4.5 V
CC
T
= 25°C
A
V
V
= 5 V
= 2 V
V
T
= 2 V
I(D)
= 25°C
CC
I(D)
A
Load = 50 Ω to V
Load = 50 Ω to V
CC
CC
T
A
= –55°C
V
CC
= 5.5 V
1
V
= 4.5 V
CC
0
2
3
4
0
1
2
3
4
V
I(S)
– Strobe Input Voltage – V
V
I(S)
– Strobe Input Voltage – V
Figure 5
Figure 6
†
Data for temperatures below 0°C and above 70°C is applicable to SN55138 circuits only.
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
†
TYPICAL CHARACTERISTICS
RECEIVER TRANSFER CHARACTERISTICS
RECEIVER TRANSFER CHARACTERISTICS
6
5
4
3
2
1
0
6
5
4
3
2
1
0
V
= 5 V
T = 25°C
A
Load:
5 V
5 V
CC
Load:
400 Ω
400 Ω
R
R
V
= 5.5 V
CC
10 kΩ
10 kΩ
V
V
= 5 V
CC
All Diodes
1N914
All Diodes
1N914
= 4.5 V
CC
T
= 25°C
T = – 55°C
A
A
T
= 125°C
A
0
1
2
3
4
0
1
2
3
4
V
I(R)
– Receiver Input Voltage – V
V
I(R)
– Receiver Input Voltage – V
Figure 7
Figure 8
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT (RECEIVER)
HIGH-LEVEL OUTPUT CURRENT (RECEIVER)
5
5
4
3
2
1
0
V
I(R)
= 0.8 V
V
CC
= 5 V
T
A
= 25°C
4
3
2
1
T
A
= 125°C
T
A
= 25°C
V
CC
= 5.5 V
T
A
= – 55°C
V
CC
= 5 V
V
= 4.5 V
15
CC
0
0
5
10
20
25
30
35
40
0
5
10
15
20
25
30
35
40
I
– High-Level Output Current – mA
I
– High-Level Output Current – mA
OH(R)
OH(R)
Figure 9
Figure 10
†
Data for temperatures below 0°C and above 70°C is applicable to SN55138 circuits only.
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
†
TYPICAL CHARACTERISTICS
LOW-LEVEL OUTPUT VOLTAGE
LOW-LEVEL OUTPUT VOLTAGE
vs
vs
LOW-LEVEL OUTPUT CURRENT (RECEIVER)
LOW-LEVEL OUTPUT CURRENT (DRIVER)
1.2
1
1.2
1
V
CC
V
I(D)
V
I(S)
= 4.5 V
= 2 V
V
V
= 4.5 V
= 3.5 V
CC
T
A
= 25°C
I(R)
= 0.8 V
T
A
= – 55°C
T = – 55°C
A
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
T
= 125°C
A
T
A
= 125°C
T
A
= 25°C
0
50
100
150
200
250
300
0
10
20
30
40
50
60
I
– Low-Level Output Current – mA
I
– Low-Level Output Current – mA
OL(R)
OL(D)
Figure 11
Figure 12
RECEIVER INPUT CURRENT
vs
RECEIVER INPUT CURRENT
vs
RECEIVER INPUT VOLTAGE
RECEIVER INPUT VOLTAGE
1.6
1.6
1.4
1.2
1
V
I(S)
= 2 V
V
= 5 V
= 2 V
CC
T
A
= 25°C
V
I(S)
1.4
1.2
1
T
= 125°C, 25°C
A
T
= – 55°C
A
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
V
= 4.5 V
CC
V
= 5 V
CC
V
= 5.5 V
CC
T
A
= 25°C, – 55°C
T
A
= 125°C
0
1
2
3
4
5
6
0
1
2
3
4
5
6
V
I(R)
– Receiver Input Voltage – V
V
I(R)
– Receiver Input Voltage – V
Figure 13
Figure 14
†
Data for temperatures below 0°C and above 70°C is applicable to SN55138 circuits only.
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
†
TYPICAL CHARACTERISTICS
SUPPLY CURRENT
vs
SUPPLY VOLTAGE
(ALL DRIVER OUTPUTS LOW)
SUPPLY CURRENT
vs
SUPPLY VOLTAGE
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
T
V
= 25°C
V
V
= 0.8 V
= 2 V
A
I(S)
I(D)
= 0.8 V
I(S)
Driver Loads = 1 kΩ to 5 V
R Output Open
Driver Loads = 1 kΩ to 5 V
4 Driver Inputs at 2 V
T
A
= 25°C
2 Driver Inputs at 2 V,
2 Driver Inputs at 0.8 V
T
= 125°C
A
4 Driver Inputs at 0.8 V
T
A
= – 55°C
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
V
CC
– Supply Voltage – V
V
CC
– Supply Voltage – V
Figure 15
Figure 16
PROPAGATION DELAY TIMES
vs
PROPAGATION DELAY TIMES
vs
FREE-AIR TEMPERATURE
SUPPLY VOLTAGE
30
32
28
24
20
16
12
8
V
= 5 V
T
= 25°C
CC
Driver Load: C = 50 pF, R = 50 Ω, See Figure 1
A
Driver Load: C = 50 pF, R = 50 Ω, See Figure 1
L
L
L
L
Receiver Load: C = 15 pF, R = 400 Ω,
See Figure 2
Receiver Load: C = 15 pF, R = 400 Ω,
L L
40
20
15
10
5
L
L
See Figure 2
t
PHL(S-D)
t (S-D)
PHL
t
PLH(S-D)
t
(S-D)
PLH
t
PLH(D-D)
t
(D-D)
PLH
t
t
t
PHL(D-D)
PHL(R-R)
PLH(R-R)
t (D-D)
PHL
t
(R-R)
PLH
t (R-R)
PHL
4
0
0
4.5 4.6 4.7 4.8 4.9
5
5.1 5.2 5.3 5.4 5.5
– 6 – 40 – 20
0
20 40 60 80 100 120 140
T
A
– Free-Air Temperature – °C
V
CC
– Supply Voltage – V
Figure 17
Figure 18
†
Data for temperatures below 0°C and above 70°C is applicable to SN55138 circuits only.
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
TYPICAL CHARACTERISTICS
RECEIVER
PROPAGATION DELAY TIMES
vs
DRIVER
PROPAGATION DELAY TIMES
vs
LOAD CAPACITANCE
LOAD CAPACITANCE
16
14
12
10
30
25
20
15
10
5
V
R
T
= 5 V
CC
L
A
= 400 Ω, See Figure 2
= 25°C
t
PHL(S-D)
t
PHL(R-R)
t
PLH(S-D)
t
PHL(D-D)
t
PLH(R-R)
8
6
t
PLH(D-D)
4
2
V
R
= 5 V
CC
= 50
,
L
See Figure 1
= 25 C
T
A
0
0
0
20 40 60 80 100 120 140 160 180 200
0
10
20
30
40
50
60
70
80
C
– Load Capacitance – pF
C
– Load Capacitance – pF
L
L
Figure 19
Figure 20
APPLICATION INFORMATION
5 V
5 V
P
100 Ω
100 Ω
A
50 ft Belden #8795
100-Ω Telephone Cable
D
B
C
1/4 SN55138
1/4 SN55138
3 V
2 V
5 V
4 V
A
C
0 V
2 V
0 V
5 V
4 V
4 V
2 V
B
D
2 V
0 V
0 V
TYPICAL VOLTAGE WAVEFORMS
Figure 21. Point-to-Point Communication Over 50 Feet of Twisted Pair at 5 MHz
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN55138, SN75138
QUADRUPLE BUS TRANSCEIVERS
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995
APPLICATION INFORMATION
5 V
100 Ω
5 V
100 Ω
50 ft
100 ft
100 ft
250 ft
A
P
E
Belden #8795
Telephone Cable
or Equivalent
1/4 SN55138
1/4 SN55138
1/4 SN55138
1/4 SN55138
1/4 SN55138
B
C
D
4 V
2 V
0 V
3 V
2 V
A
D
E
0 V
4 V
2 V
0 V
4 V
B
C
2 V
0 V
4 V
2 V
0 V
TYPICAL VOLTAGE WAVEFORMS
Figure 22. Party-Line Communication on 500 Feet of Twisted Pair at 1 MHz
5 V
5 V
100 Ω
100 Ω
1000 ft RG-53
or Equivalent
A
D
B
C
1/4 SN55138
1/4 SN55138
5 V
4 V
3 V
2 V
C
A
2 V
0 V
0 V
5 V
4 V
3 V
2 V
2 V
D
B
0 V
0 V
TYPICAL VOLTAGE WAVEFORMS
Figure 23. Point-to-Point Communication Over 1000 Feet of Coaxial Cable at 1 MHz
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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