ON Semiconductort
Quad EIA−485 Line Drivers
with Three−State Outputs
The ON Semiconductor MC75172B/174B Quad Line drivers are
differential high speed drivers designed to comply with the EIA−485
Standard. Features include three−state outputs, thermal shutdown,
and output current limiting in both directions. These devices also
comply with EIA−422−A, and CCITT Recommendations V.11 and
X.27.
The MC75172B/174B are optimized for balanced multipoint bus
transmission at rates in excess of 10 MBPS. The outputs feature wide
common mode voltage range, making them suitable for party line
applications in noisy environments. The current limit and thermal
shutdown features protect the devices from line fault conditions.
These devices offer optimum performance when used with the
MC75173 and MC75175 line receivers.
Both devices are available in 16−pin plastic DIP and 20−pin wide
body surface mount packages.
•
Meets EIA−485 Standard for Party Line Operation
•
Meets EIA−422−A and CCITT Recommendations V.11 and X.27
•
Operating Ambient Temperature:
−40°C
to +85°C
•
High Impedance Outputs
•
Common Mode Output Voltage Range:
−7
to 12 V
•
Positive and Negative Current Limiting
•
Transmission Rates in Excess of 10 MBPS
•
Thermal Shutdown at 150°C Junction Temperature, (±20°C)
•
Single 5.0 V Supply
•
Pin Compatible with TI SN75172/4 and NS
μA96172/4
•
Interchangeable with MC3487 and AM26LS31 for EIA−422−A
Applications
MC75172B
MC75174B
QUAD EIA−485 LINE DRIVERS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 648
DW SUFFIX
PLASTIC PACKAGE
CASE 751D
(SO−20L)
ORDERING INFORMATION
Device
MC75172BDW
MC75174BDW
MC75174BP
T
A
=
−
40° to +85°C
Operating
Temperature Range
Package
SO−20L
SO−20L
Plastic DIP
w
These devices are available in Pb−free package(s). Specifications herein
apply to both standard and Pb−free devices. Please see our website at
www.onsemi.com for specific Pb−free orderable part numbers, or contact
your local ON Semiconductor sales office or representative.
©
Semiconductor Components Industries, LLC, 2006
March, 2006
−
Rev. 3
1
Publication Order Number:
MC75172B/D
MC75172B MC75174B
PIN CONNECTIONS
MC75172B
1A 1
1Y 2
1Z 3
En 4
2Z 5
2Y 6
2A 7
Gnd 8
P Package
16 V
CC
1A 1
15 4A
14 4Y
13 4Z
12 En
11 3Z
10 3Y
9 3A
1Y 2
NC 3
1Z 4
En 5
2Z 6
NC 7
2Y 8
2A 9
Gnd 10
DW Package
20 V
CC
19 4A
18 4Y
17 NC
16 4Z
15 En
14 3Z
13 NC
12 3Y
11 3A
1A 1
1Y 2
1Z 3
En 4
12
2Z 5
2Y 6
2A 7
Gnd 8
P Package
MC75174B
16 V
CC
1A 1
15 4A
1Y 2
20 V
CC
19 4A
18 4Y
17 NC
16 4Z
15 En
34
14 3Z
13 NC
12 3Y
11 3A
DW Package
14 4Y NC 3
13 4Z
12 En
34
11 3Z
10 3Y
9 3A
1Z 4
En 5
12
2Z 6
NC 7
2Y 8
2A 9
Gnd 10
MAXIMUM RATINGS
Rating
Power Supply Voltage
Input Voltage (Data, Enable)
Input Current (Data, Enable)
Applied Output Voltage, when in 3−State Condition (V
CC
= 5.0 V)
Applied Output Voltage, when V
CC
= 0 V
Output Current
Storage Temperature
Symbol
V
CC
V
in
I
in
V
za
V
zb
I
O
T
stg
Value
−0.5,
+7.0
+7.0
−24
−10,
+14
±14
Self−Limiting
−65,
+150
−
°C
Unit
Vdc
Vdc
mA
Vdc
Devices should not be operated at these limits. The “Recommended Operating Conditions” table provides for actual device operation.
RECOMMENDED OPERATING CONDITIONS
Characteristic
Power Supply Voltage
Input Voltage (All Inputs)
Output Voltage in 3−State Condition, or when V
CC
= 0 V
Output Current (Normal data transmission)
Operating Ambient Temperature (see text)
EIA−485
EIA−422
All limits are not necessarily functional concurrently.
Symbol
V
CC
V
in
V
cm
I
O
T
A
Min
+4.75
0
−7.0
−65
−40
0
Typ
+5.0
−
−
−
−
−
Max
+5.25
V
CC
+12
+65
+85
+85
Unit
Vdc
Vdc
Vdc
mA
°C
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2
MC75172B MC75174B
ELECTRICAL CHARACTERISTICS
(−40°C
p
T
A
p
85°C, 4.75 V
p
V
CC
p
5.25 V, unless otherwise noted.)
Characteristic
Output Voltage
Single−Ended Voltage
I
O
= 0
High @ I
O
=
−33
mA
Low @ I
O
= +33 mA
Differential Voltage
Open Circuit (I
O
= 0)
R
L
= 54
Ω
(Figure 1)
Change in Differential*, R
L
= 54
Ω
(Figure 1)
Differential Voltage, R
L
= 100
Ω
(Figure 1)
Change in Differential*, R
L
= 100
Ω
(Figure 1)
Differential Voltage,
−7.0
V
p
V
cm
p
12 V (Figure 2)
Change in Differential*,
−7.0
V
p
V
cm
p
12 V (Figure 2)
Offset Voltage, R
L
= 54
Ω
(Figure 1)
Change in Offset*, R
L
= 54
Ω
(Figure 1)
Output Current (Each Output)
Power Off Leakage, V
CC
= 0,
−7.0
V
p
V
O
p
12 V
Leakage in 3−State Mode,
−7.0
V
p
V
O
p
12 V
Short Circuit Current to Ground
Short Circuit Current,
−7.0
V
p
V
O
p
12 V
*V
in
switched from 0.8 to 2.0 V.
Typical values determined at 25°C ambient and 5.0 V supply.
Symbol
Min
Typ
Max
Unit
Vdc
V
O
V
OH
V
OL
⎥
V
OD1
⎜
⎥
V
OD2
⎜
⎥ ΔV
OD2
⎜
⎥
V
OD2A
⎜
⎥ ΔV
OD2A
⎜
⎥
V
OD3
⎜
⎥ ΔV
OD3
⎜
V
OS
⎥ ΔV
OS
⎜
I
O(off)
I
OZ
I
OSR
I
OS
0
−
−
1.5
1.5
−
−
−
1.5
−
−
−
−50
−50
−150
−250
−
4.0
1.6
3.4
2.3
5.0
2.2
5.0
−
5.0
2.9
5.0
0
0
−
−
6.0
−
−
6.0
5.0
200
−
200
5.0
200
−
200
+50
+50
+150
+250
mVdc
Vdc
mVdc
Vdc
mVdc
Vdc
mVdc
μA
mA
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3
MC75172B MC75174B
ELECTRICAL CHARACTERISTICS
(−40°C
p
T
A
p
85°C, 4.75 V
p
V
CC
p
5.25 V, unless otherwise noted.)
Characteristics
Inputs
Low Level Voltage (Pins 4 & 12, MC75174B only)
Low Level Voltage (All Other Pins)
High Level Voltage (All Inputs)
Current @ V
in
= 2.7 V (All Inputs)
Current @ V
in
= 0.5 V (All Inputs)
Clamp Voltage (All Inputs, I
in
=
−18
mA)
Thermal Shutdown Junction Temperature
Power Supply Current (Outputs Open, V
CC
= 5.25 V)
Outputs Enable
Outputs Disabled
Symbol
V
IL(A)
V
IL(B)
V
IH
I
IH
I
IL
V
IK
T
jts
I
CC
Min
0
0
2.0
−
−100
−1.5
−
−
−
Typ
−
−
−
0.2
−15
−
+150
60
30
Max
0.7
0.8
V
CC
20
−
−
−
70
40
μA
Vdc
°C
mA
Unit
Vdc
TIMING CHARACTERISTICS
(T
A
= 25°C, V
CC
= 5.0 V)
Characteristics
Propagation Delay
−
Input to Single−ended Output (Figure 3)
Output Low−to−High
Output High−to−Low
Propagation Delay
−
Input to Differential Output (Figure 4)
Input Low−to−High
Input High−to−Low
Differential Output Transition Time (Figure 4)
Skew Timing
⎜t
PLHD
−
t
PHLD
⎜
for Each Driver
Max
−
Min t
PLHD
Within a Package
Max
−
Min t
PHLD
Within a Package
Enable Timing
Single−ended Outputs (Figure 5)
Enable to Active High Output
Enable to Active Low Output
Active High to Disable (using Enable)
Active Low to Disable (using Enable)
Enable to Active High Output (MC75172B only)
Enable to Active Low Output (MC75172B only)
Active High to Disable (using Enable, MC75172B only)
Active Low to Disable (using Enable, MC75172B only)
Differential Outputs (Figure 6)
Enable to Active Output
Enable to Active Output (MC75172B only)
Enable to 3−State Output
Enable to 3−State Output (MC75172B only)
Symbol
t
PLH
t
PHL
t
PLH(D)
t
PHL(D)
t
dr
, t
df
t
SK1
t
SK2
t
SK3
Min
−
−
−
−
−
−
−
−
Typ
23
18
15
17
19
0.2
1.5
1.5
Max
30
30
ns
25
25
25
−
−
−
ns
t
PZH(E)
t
PZL(E)
t
PHZ(E)
t
PLZ(E)
t
PZH(E)
t
PZL(E)
t
PHZ(E)
t
PLZ(E)
t
PZD(E)
t
PZD(E)
t
PDZ(E)
t
PDZ(E)
−
−
−
−
−
−
−
−
−
−
−
−
48
20
35
30
58
28
38
36
47
56
32
40
60
30
45
50
70
35
50
50
ns
−
−
−
−
ns
ns
Unit
ns
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4
MC75172B MC75174B
V
CC
V
in
(0.8 or 2.0 V)
R
L
/2
V
OD2,A
R
L
/2
V
OS
V
in
(0.8 or 2.0 V)
V
CC
375
V
OD3
58
375
+
V
CM
= 12 to −7.0 V
Figure 1. V
DD
Measurement
Figure 2. Common Mode Test
3.0 V
V
CC
V
in
Y
Z
S.G.
Output Z
t
PHL
3.0 V
2.3 V
27
Ω
Output
15 pF
Output Y
3.0 V
3.0 V
V
OL
t
PLH
3.0 V
V
OH
V
in
1.5 V
t
PLH
t
PHL
1.5 V
0V
Figure 3. Propagation Delay, Single−Ended Outputs
3.0 V
V
CC
V
in
V
in
54
50 pF
V
OD
1.5 V
t
PLHD
1.5 V
0V
t
PHLD
1.5 V
50%
−1.5 V
t
df
S.G.
V
OD
1.5 V
50%
−1.5 V
t
dr
[4.6
V
NOTES:
1. S.G. set to: f
p
1.0 MHz; duty cycle = 50%; t
r
, t
f
,
p
5.0 ns.
2. t
SK1
=
⎥
t
PLHD
−
t
PHLD
⎥
for each driver.
3. t
SK2
computed by subtracting the shortest t
PLHD
from the longest t
PLHD
of the 4 drivers within a package.
4. t
SK3
computed by subtracting the shortest t
PHLD
from the longest t
PHLD
of the 4 drivers within a package.
Figure 4. Propagation Delay, Differential Outputs
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