Order this document by MC75172B/D
Quad EIA-485 Line Drivers
with Three-State Outputs
The Motorola 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.
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Meets EIA–485 Standard for Party Line Operation
MC75172B
MC75174B
QUAD EIA–485 LINE DRIVERS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 648
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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
Device
MC75172BDW
MC75174BDW
MC75174BP
TA = – 40° to +85°C
DW SUFFIX
PLASTIC PACKAGE
CASE 751D
(SO–20L)
ORDERING INFORMATION
Operating
Temperature Range
Package
SO–20L
SO–20L
Plastic DIP
PIN CONNECTIONS
MC75172B
1A 1
1Y 2
1Z 3
En 4
2Z 5
2Y 6
2A 7
Gnd 8
P Package
16 VCC 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 VCC
19 4A
18 4Y
17 NC
16 4Z
15 En
14 3Z
13 NC
12 3Y
11 3A
MC75174B
16 VCC 1A 1
15 4A
1Y 2
20 VCC
19 4A
18 4Y
17 NC
16 4Z
15 En
34
14 3Z
13 NC
12 3Y
11 3A
DW Package
1A 1
1Y 2
1Z 3
En 4
12
2Z 5
2Y 6
2A 7
Gnd 8
P 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
©
Motorola, Inc. 1996
Rev 1
MOTOROLA ANALOG IC DEVICE DATA
1
MC75172B MC75174B
MAXIMUM RATINGS
Rating
Power Supply Voltage
Input Voltage (Data, Enable)
Input Current (Data, Enable)
Applied Output Voltage, when in 3–State Condition
(VCC = 5.0 V)
Applied Output Voltage, when VCC = 0 V
Output Current
Storage Temperature
Symbol
VCC
Vin
Iin
Vza
Vzb
IO
Tstg
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 VCC = 0 V
Output Current (Normal data transmission)
Operating Ambient Temperature (see text)
EIA–485
EIA–422
All limits are not necessarily functional concurrently.
Symbol
VCC
Vin
Vcm
IO
TA
Min
+4.75
0
–7.0
–65
–40
0
Typ
+5.0
–
–
–
–
–
Max
+5.25
VCC
+12
+65
+85
+85
Unit
Vdc
Vdc
Vdc
mA
°C
ELECTRICAL CHARACTERISTICS
(–40°C
Characteristic
Output Voltage
Single–Ended Voltage
IO = 0
High @ IO = –33 mA
Low @ IO = +33 mA
Differential Voltage
Open Circuit (IO = 0)
RL = 54
Ω
(Figure 1)
p
TA
p
85°C, 4.75 V
p
VCC
p
5.25 V, unless otherwise noted.)
Symbol
Min
Typ
Max
Unit
Vdc
VO
VOH
VOL
VOD1
VOD2
∆V
OD2
VOD2A
∆V
OD2A
VOD3
∆V
OD3
VOS
∆V
OS
IO(off)
IOZ
IOSR
IOS
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
Change in Differential*, RL = 54
Ω
(Figure 1)
Differential Voltage, RL = 100
Ω
(Figure 1)
Change in Differential*, RL = 100
Ω
(Figure 1)
Vcm
12 V (Figure 2)
Differential Voltage, –7.0 V
Change in Differential*, –7.0 V
Vcm
12 V (Figure 2)
Offset Voltage, RL = 54
Ω
(Figure 1)
Change in Offset*, RL = 54
Ω
(Figure 1)
p
p
p
p
Output Current (Each Output)
Power Off Leakage, VCC = 0, –7.0 V
VO
12 V
Leakage in 3–State Mode, –7.0 V
VO
12 V
p p
p p
Short Circuit Current to Ground
Short Circuit Current, –7.0 V
VO
p p
12 V
*Vin switched from 0.8 to 2.0 V.
Typical values determined at 25°C ambient and 5.0 V supply.
2
MOTOROLA ANALOG IC DEVICE DATA
MC75172B MC75174B
ELECTRICAL CHARACTERISTICS
(–40°C
Characteristics
Inputs
Low Level Voltage (Pins 4 & 12, MC75174B only)
Low Level Voltage (All Other Pins)
High Level Voltage (All Inputs)
Current @ Vin = 2.7 V (All Inputs)
Current @ Vin = 0.5 V (All Inputs)
Clamp Voltage (All Inputs, Iin = –18 mA)
Thermal Shutdown Junction Temperature
Power Supply Current (Outputs Open, VCC = 5.25 V)
Outputs Enable
Outputs Disabled
p
TA
p
85°C, 4.75 V
p
VCC
p
5.25 V, unless otherwise noted.)
Symbol
VIL(A)
VIL(B)
VIH
IIH
IIL
VIK
Tjts
ICC
–
–
60
30
70
40
Min
0
0
2.0
–
–100
–1.5
–
Typ
–
–
–
0.2
–15
–
+150
Max
0.7
0.8
VCC
20
–
–
–
µA
Vdc
°C
mA
Unit
Vdc
TIMING CHARACTERISTICS
(TA = 25°C, VCC = 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 – tPHLD
for Each Driver
Max – Min tPLHD Within a Package
Max – Min tPHLD 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
tPLH
tPHL
tPLH(D)
tPHL(D)
tdr, tdf
tSK1
tSK2
tSK3
Min
–
–
–
–
–
–
–
–
Typ
23
18
15
17
19
0.2
1.5
1.5
Max
30
30
ns
25
25
25
–
–
–
ns
tPZH(E)
tPZL(E)
tPHZ(E)
tPLZ(E)
tPZH(E)
tPZL(E)
tPHZ(E)
tPLZ(E)
tPZD(E)
tPZD(E)
tPDZ(E)
tPDZ(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
MOTOROLA ANALOG IC DEVICE DATA
3
MC75172B MC75174B
Figure 1. VDD Measurement
VCC
Vin
(0.8 or 2.0 V)
RL/2
VOD2,A
RL/2
VOS
Vin
(0.8 or 2.0 V)
VCC
375
VOD3
58
375
+
VCM = 12 to –7.0 V
Figure 2. Common Mode Test
Figure 3. Propagation Delay, Single–Ended Outputs
3.0 V
VCC
Vin
Y
Z
S.G.
Output Z
tPHL
3.0 V
2.3 V
27
Ω
Output
15 pF
Output Y
3.0 V
3.0 V
tPLH
3.0 V
VOL
VOH
Vin
1.5 V
tPLH
1.5 V
0V
tPHL
Figure 4. Propagation Delay, Differential Outputs
3.0 V
VCC
Vin
Vin
54
50 pF
VOD
1.5 V
tPLHD
1.5 V
0V
tPHLD
S.G.
VOD
1.5 V
50%
– 1.5 V
tdr
[
4.6 V
tdf
1.5 V
50%
– 1.5 V
NOTES:
1. S.G. set to: f
1.0 MHz; duty cycle = 50%; tr, tf,
5.0 ns.
2. tSK1 =
tPLHD – tPHLD
for each driver.
3. tSK2 computed by subtracting the shortest tPLHD from the longest tPLHD of the 4 drivers within a package.
4. tSK3 computed by subtracting the shortest tPHLD from the longest tPHLD of the 4 drivers within a package.
p
p
4
MOTOROLA ANALOG IC DEVICE DATA
MC75172B MC75174B
Figure 5. Enable Timing, Single–Ended Outputs
VCC
Vin
0 or 3.0 V
Vin
3.0 V
S.G.
50 pF
Vout
2.3 V
Vout
110Ω
1.5 V
tPZH(E)
3.0 V
1.5 V
0V
tPHZ(E)
VOH
0.5 V
VCC
0 or 3.0 V
50 pF
Vin
3.0 V
VCC
110Ω
Vout
Vin
1.5 V
tPZL(E)
3.0 V
1.5 V
0V
tPLZ(E)
Vout
2.3 V
0.5 V
S.G.
VOL
Figure 6. Enable Timing, Differential Outputs
3.0 V
Vin
0 or 3.0 V
Vin
3.0 V
VOD
S.G.
1.5 V
0
Disabled
Active
Disabled
1.5 V
0
54
50 pF
VOD
1.5 V
tPZD(E)
tPDZ(E)
1.5 V
0V
VCC
NOTES:
1. S.G. set to: f
1.0 MHz; duty cycle = 50%; tf, tf,
2. Vin is inverted for Enable measurements.
p
p
5.0 ns.
MOTOROLA ANALOG IC DEVICE DATA
5
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