Mitsubishi M75179P, M75178P, M75177P Datasheet
MITSUBISHI 〈DIGITAL ASSP〉
MITSUBISHI 〈DIGITAL ASSP〉
DESCRIPTION
Each of the M75176 to M75179 is a semiconductor IC with a
built-in differential driver and a built-in differential receiver
both of which meet the EIA standards RS-422A and RS-485.
FEATURES
Common
• 5V single power supply
• With output control input (except M75179P)
Driver
•54Ω terminal resistor connectable between outputs.
• High output impedance at power-OFF time
• Built-in output current limit circuit
Receiver
• High input sensitivity (±200mV max.)
• Hysteresis input (50mV typ.)
• High input impedance (12kΩ min.)
• “H” emitted when input is open (failsafe function)
APPLICATION
High-speed data transmission interface for digital equipment
M75176P, M75177P
M75178P, M75179P
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
RS-485 TRANSCEIVER
PIN CONFIGURATION (TOP VIEW)
RE
DE
←
1
R
→
2
→
3
→
4
D
8
V
CC
↔
7
B
I/O BUS
↔
6
A
5
GND
RECEIVER OUTPUT
RECEIVER OUTPUT
CONTROL INPUT
DRIVER OUTPUT
CONTROL INPUT
DRIVER INPUT
M75176P
←
CC
V
←
T
REPEATER OUTPUT
OUTPUT CONTROL INPUT
→
EN
GND
1
2
3
4
8
A
←
7
B
→
6
Z
→
5
Y
RECEIVER INPUT
DRIVER OUTPUT
DESCRIPTION OF FUNCTION
The M75176P to M75179P are line interface ICs which meet
EIA standards RS-422A and RS-485, and are suitable for
long-distance, high-speed data transmission.
The M75176P is designed to connect the driver circuit output
and the receiver input to each other internally, and serves as
a line transceiver. The M75177P/M75178P is designed to
connect the receiver circuit output and the driver circuit input
internally, and serves as a line repeater. The M75177P and
M75178P enter the output enabled state with active “H” and
active “L”, respectively. The M75179P is equipped with a
built-in differential driver and a built-in differential receiver. It
does not have an output control input pin but its output impedance at the power-OFF time goes high.
CC
V
←
T
REPEATER OUTPUT
OUTPUT CONTROL INPUT
RECEIVER OUTPUT
DRIVER INPUT
→
EN
GND
CC
V
R
D
GND
←
→
M75177P
1
2
3
4
M75178P
1
2
3
4
M75179P
Outline 8P4
←
A
8
←
7
B
→
Z
6
→
Y
5
←
8
A
←
7
B
→
6
Z
→
5
Y
RECEIVER INPUT
DRIVER OUTPUT
RECEIVER INPUT
DRIVER OUTPUT
1
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
FUNCTION TABLE
(Note 1)
(a) M75176P
Driver Receiver
INPUTS OUTPUTS
D
H
L
X
DE
H
H
A
H
L
L
Z
B
L
H
Z
–0.2V < VID < 0.2V
(b) M75177P/M75178P
INPUTS
VID
VID > 0.2V
–0.2V < VID < 0.2V
VID < –0.2V
X
EN (M75177P)
H
H
H
L
EN (M75178P)
(c) M75179P
Driver Receiver
INPUTS
D
H
L
Note 1: VID : (A applied voltage) – (B applied voltage)
X : Either “L” or “H”
✽ : Output state is not defined.
Z : High impedance state.
OUTPUTS INPUTS
Y
H
L
Z
L
H
INPUTS OUTPUTS
VID
VID > 0.2V
VID < –0.2V
X
L
L
L
H
VID
VID > 0.2V
–0.2V < VID < 0.2V
VID < –0.2V
RE
L
L
L
H
OUTPUTS
T
H
✽
L
Z
Y
H
✽
L
Z
R
H
✽
L
Z
Z
L
✽
H
Z
OUTPUTS
R
H
✽
L
2
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VID
VIE
Pd
Tstg
Note 2: When Ta ≥ 25°C, do derating according to the attached thermal derating.
Supply voltage
Differential input voltage
Enable input voltage
Power dissipation (Note 2)
Storage temperature
Parameter
75177/178/179
75176/177/178
When Ta=25°C
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI, VIC
VID
IOH
IOL
Topr
Supply voltage
Bus pin voltage (each pin voltage, in-phase input voltage)
Differential input voltage
“H” output current
“L” output current
Operating ambient temperature
Parameter
Driver
Receiver
Driver
Receiver
VOL < 0.45V
VOL < 0.5V
Min.
4.75
–7
–12
–20
Conditions
0
0
0
0
0
Limits
Typ.
5
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
Ratings
–0.5 ~ +7
–25 ~ +25
–0.5 ~ +5.5
925
–65 ~ 150
60
16
75
Unit
V
V
V
mA
mA
8
mA
°C
Max.
5.25
+12
+12
–60
–400
Unit
V
V
V
mW
°C
ELECTRICAL CHARACTERISTICS (Driver) (VCC = 5V ± 5%, Ta = –20 ~ 75°C, unless otherwise noted)
Symbol
VIH
VIL
VIK
|VOD1|
|VOD2|
∆|VOD|
VOL
∆|VOC|
IO
IOZ
IIH
IIL
IOS
ICC
*: The standard value is given on the condition of VCC = 5V and Ta = 25°C.
Note 3: The standard is 1.9V (min.) when T
“H” input voltage
“L” input voltage
Input clamp voltage
Differential output voltage 1
Differential output voltage 2
Differential output voltage variance width
In-phase output voltage
In-phase output voltage variance width
Output current
Off-state output current
“H” input current
“L” input current
Output short-circuit current
Supply voltage
Parameter
a ≤ 0°C.
75176
75177/178/179
75177/178
Test conditions
II=–18mA
IO=0mA
RL=100Ω See Fig. 1.
RL=54Ω See Fig. 1.
RL=54/100Ω See Fig. 1.
Output disable
VCC=0V, VO=–7 ~ +12V
VO=–7 ~ +12V
VI=2.4V
VI=0.4V
VO=–7V
VO=0V
VO=VCC
VO=12V
No output load
VO=12V
VO=–7V
Output enable
Output disable
Min.
2
1.5
2 (Note 3)
VOD1/2
1.5
–1
Limits
Typ.*
2.42
2.18
2.08
29.5
32.5
Max.
0.8
–1.5
±0.2
±0.2
–0.8
±100
±300
20
–400
–250
–150
250
250
48
48
Unit
V
V
V
6
V
V
5
V
3
V
V
1
mA
mA
mA
mA
mA
mA
mA
3
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