MITSUBISHI M75177P

MITSUBISHI
MITSUBISHI
〈DIGITAL
〈DIGITAL
ASSP〉
ASSP〉
M75176P,
M75176P,
M75177P
M75177P
M75178P,
M75178P,
M75179P
M75179P
RS-485 TRANSCEIVER
RS-485 TRANSCEIVER
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.
PIN CONFIGURATION (TOP VIEW)
R← 1
RECEIVER OUTPUT
FEATURES
Common
• 5V single power supply
• With output control input (except M75179P)
RECEIVER OUTPUT
RE → 2
CONTROL INPUT
DRIVER OUTPUT
DE → 3
CONTROL INPUT
APPLICATION
High-speed data transmission interface for digital equipment
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.
VCC
7 ↔B
6 ↔A
D→ 4
DRIVER INPUT
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)
8
5
I/O BUS
GND
M75176P
1
8 ←A
T← 2
7 ←B
OUTPUT CONTROL INPUT EN → 3
6 →Z
4
5 →Y
VCC
RECEIVER INPUT
REPEATER OUTPUT
GND
DRIVER OUTPUT
M75177P
1
8 ←A
T← 2
7 ←B
OUTPUT CONTROL INPUT EN → 3
6 →Z
VCC
REPEATER OUTPUT
GND
5 →Y
4
RECEIVER INPUT
DRIVER OUTPUT
M75178P
1
8 ←A
RECEIVER OUTPUT R ← 2
7 ←B
DRIVER INPUT D → 3
6 →Z
4
5 →Y
VCC
RECEIVER INPUT
GND
DRIVER OUTPUT
M75179P
Outline 8P4
1
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
FUNCTION TABLE
(a) M75176P
Driver
(Note 1)
Receiver
INPUTS
D
H
L
X
OUTPUTS
DE
H
H
L
A
H
L
Z
B
L
H
Z
INPUTS
VID
VID > 0.2V
–0.2V < VID < 0.2V
VID < –0.2V
X
OUTPUTS
R
H
✽
L
Z
RE
L
L
L
H
(b) M75177P/M75178P
INPUTS
EN (M75177P)
H
H
H
L
VID
VID > 0.2V
–0.2V < VID < 0.2V
VID < –0.2V
X
(c) M75179P
Driver
INPUTS
D
H
L
Note 1: VID :
X :
✽ :
Z :
2
OUTPUTS
EN (M75178P)
L
L
L
H
T
H
✽
L
Z
Y
H
✽
L
Z
Receiver
OUTPUTS
Y
H
L
(A applied voltage) – (B applied voltage)
Either “L” or “H”
Output state is not defined.
High impedance state.
Z
L
H
INPUTS
VID
VID > 0.2V
–0.2V < VID < 0.2V
VID < –0.2V
OUTPUTS
R
H
✽
L
Z
L
✽
H
Z
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VID
VIE
Pd
Tstg
Parameter
Supply voltage
Differential input voltage
75177/178/179
Enable input voltage
75176/177/178
Power dissipation (Note 2)
Storage temperature
Conditions
Ratings
–0.5 ~ +7
–25 ~ +25
–0.5 ~ +5.5
925
–65 ~ 150
When Ta=25°C
Unit
V
V
V
mW
°C
Note 2: When Ta ≥ 25°C, do derating according to the attached thermal derating.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
VCC
VI, VIC
VID
Supply voltage
Bus pin voltage (each pin voltage, in-phase input voltage)
Differential input voltage
IOH
“H” output current
IOL
“L” output current
Topr
Operating ambient temperature
Driver
Receiver
Driver
Receiver
VOL < 0.45V
VOL < 0.5V
Min.
4.75
–7
–12
0
0
0
0
0
–20
Limits
Typ.
5
Unit
Max.
5.25
+12
+12
–60
–400
60
8
16
75
V
V
V
mA
mA
mA
°C
ELECTRICAL CHARACTERISTICS (Driver) (VCC = 5V ± 5%, Ta = –20 ~ 75°C, unless otherwise noted)
Symbol
Parameter
VIH
VIL
VIK
|VOD1|
“H” input voltage
“L” input voltage
Input clamp voltage
Differential output voltage 1
|VOD2|
Differential output voltage 2
∆|VOD|
VOL
∆|VOC|
Differential output voltage variance width
In-phase output voltage
In-phase output voltage variance width
IO
Output current
IOZ
IIH
IIL
Off-state output current
“H” input current
“L” input current
IOS
Output short-circuit current
ICC
Supply voltage
75176
75177/178/179
75177/178
Test conditions
II=–18mA
IO=0mA
Min.
2
RL=100Ω
See Fig. 1.
RL=54Ω
See Fig. 1.
1.5
2 (Note 3)
VOD1/2
1.5
RL=54/100Ω
See Fig. 1.
–1
Limits
Typ.*
0.8
–1.5
6
V
V
V
V
V
2.18
2.08
VO=12V
VO=–7V
VCC=0V, VO=–7 ~ +12V
VO=–7 ~ +12V
VI=2.4V
VI=0.4V
VO=–7V
VO=0V
VO=VCC
VO=12V
Output enable
Output disable
Unit
2.42
Output disable
No output load
Max.
29.5
32.5
5
±0.2
3
±0.2
1
–0.8
±100
±300
20
–400
–250
–150
250
250
48
48
V
V
V
mA
mA
mA
mA
mA
mA
mA
*: The standard value is given on the condition of VCC = 5V and Ta = 25°C.
Note 3: The standard is 1.9V (min.) when Ta ≤ 0°C.
3
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
SWITCHING CHARACTERISTICS (Driver) (VCC = 5V, Ta=25°C)
Symbol
tDD
tTD
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Parameter
Differential output delay time
Differential output transition time
Output “L - H” propagation delay time
Output “H - L” propagation delay time
“H” enable time
“L” enable time
“H” disable time
“L” disable time
Test conditions
RL=54Ω
CL=50pF
See Fig. 2.
RL=27Ω
CL=50pF
See Fig. 3.
RL=110Ω
CL=50pF
See Figs. 4 & 5.
Min.
Limits
Typ.
13
11
15
12
23
16
11
22
Max.
25
25
25
25
35
35
25
35
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ELECTRICAL CHARACTERISTICS (Receiver) (VCC = 5V ± 5%, Ta = –20 ~ 75°C, unless otherwise noted)
Symbol
VTH
Parameter
Test conditions
VTL
VT+ - VT–
VIK
VOH
High threshold voltage
Low threshold voltage
Hysteresis width (Note 4)
Enable input clamp voltage
“H” output voltage
VO=2.7V, IO=–0.4mA
VO=0.5V, IO=16mA
VOL
“L” output voltage
VID=–0.2V
IOZ
Off-state output current
II
Line input current
IIH
“H” enable input current
IIL
“L” enable input current
ri
IOS
Input resistance
Output short-circuit current
VO=0V
ICC
Supply voltage
No output load
75176
75177/178
Limits
Typ.*
Max.
0.2
–0.2
50
II=–18mA
VID=0.2V, IOH=–0.4mA
–1.5
2.7
IOL=8mA
IOL=16mA
3.6
0.23
0.30
VO=0.4 ~ 2.4V
VO=0.4V
VO=2.4V
Other input 0V
75176/177/178
75176
75177/178
Min.
VO=12V
VO=–7V
VIH=2.7V
VIL=0.4V
12
–15
0.45
0.5
±20
–400
20
1
–0.8
20
–100
–400
–85
48
48
Output enable
Output disable
Unit
V
V
mV
V
V
V
mA
mA
mA
mA
kΩ
mA
mA
*: The standard value is given on the condition of VCC = 5V and Ta = 25°C.
Note 4: The hysteresis width is the difference between positive threshold voltage VT+ and negative threshold voltage VT–.
SWITCHING CHARACTERISTICS (Receiver) (VCC = 5V, Ta=25°C)
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
4
Parameter
Output “L - H” propagation delay time
Output “H - L” propagation delay time
“H” enable time
“L” enable time
“H” disable time
“L” disable time
Test conditions
CL=15pF
See Fig. 6.
CL=15pF
See Fig. 7.
CL=15pF
See Fig. 7.
Min.
Limits
Typ.
22
19
9
11
17
22
Max.
35
35
20
20
35
35
Unit
ns
ns
ns
ns
ns
ns
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
TEST CIRCUITS
Fig. 1
RL / 2
VOD2
RL / 2
VOC
Driver differential output voltage 2, in-phase output voltage
Fig. 2
3V
1.5V
Input
P.G.
(Note 5)
Output
RL
Input
1.5V
0V
CL
(Note 6)
tDD
tDD
50Ω
Output
3V
(M75178P is 0V)
90%
50%
50%
10%
Test circuit
tTD
tTD
I/O waveform
Driver differential output delay time and transition time
Fig. 3
3V
2.3V
P.G.
(Note 5)
1.5V
Input
1.5V
0V
RL
Input
tPLH
Output
50Ω
VOH
2.3V
CL
(Note 6)
3V
(M75178P is 0V)
tPHL
2.3V
VOL
VOH
Output
tPHL
2.3V
Test circuit
tPLH
2.3V
VOL
I/O waveform
Driver delay time
Fig. 4
Output
0V or 3V
P.G.
(Note 5)
RL
CL
(Note 6)
Input
3V
(M75178P)
Input
(M75176/177P)
1.5V
1.5V
0V
tPHZ
tPZH
0.5V
VOH
50Ω
2.3V
Output
Test circuit
0V
I/O waveform
Driver enable/disable time
Fig. 5
5V
RL
Output
3V or 0V
P.G.
(Note 5)
50Ω
1.5V
Output
1.5V
0V
tPLZ
tPZL
CL
(Note 6)
Input
3V
(M75178P)
Input
(M75176/177P)
2.3V
0.5V
5V
VOL
Test circuit
I/O waveform
Driver enable/disable time
Note 5: The pulse generator is PRR ≤ 1MHz, duty ratio = 50%, tr ≤ 6ns, tf ≤ 6ns, ZOUT = 50Ω.
6: CL includes jigs and probe capacitance.
5
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
Fig. 6
3V
Input
P.G.
(Note 7)
1.5V
Input
1.5V
0V
Output
50Ω
1.5V
tPHL
tPLH
CL
(Note 8)
VOH
0V
M75177P is 3V
1.3V
1.3V
Output
VOL
Test circuit
I/O waveform
Receiver propagation delay time
Fig. 7
1.5V
Output
S1
2kΩ
S2
5V
–1.5V
P.G.
(Note 7)
CL
(Note 8)
Input
5kΩ
50Ω
S3
Test circuit
(M75177P)
(M75177P)
3V
Input
3V
Input
1.5V
1.5V
(M75176/178P)
1.5V
1.5V
(M75176/178P)
0V
0V
tPZH
tPZL
VOH
4.5V
1.5V
Output
1.5V
Output
0V
S1 1.5V side
S2 open
(M75177P)
S1 1.5V side
(M75176/178P)
VOH
1.3V
Output
1.3V
S2 closed
S3 closed
Receiver enable/disable time
Note 7: The pulse generator is PRR ≤ 1MHz, duty ratio = 50%, tr ≤ 6ns, tf ≤ 6ns, ZOUT = 50Ω.
8: CL includes jigs and probe capacitance.
6
0V
tPLZ
0.5V
S1 1.5V side
1.5V
1.5V
(M75176/178P)
0V
tPHZ
Output
S3 open
3V
Input
1.5V
1.5V
S2 closed
(M75177P)
3V
Input
VOL
S3 closed
0.5V
S1 1.5V side
VOL
S2 closed
S3 closed
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
THERMAL DERATING
SUPPLY CURRENT - SUPPLY VOLTAGE CHARACTERISTIC
THERMAL DERATING CHARACTERISTIC
1000
SUPPLY CURRENT ICC (mA)
750
500
250
0
–20
40
Output disable
EN = 0V
30
Output enable
EN = 4.5V
20
M75177P
A=0V
B=4.5V
Ta=25°C
10
0
0
20
40
60
0
80
2
DRIVER
“H” OUTPUT VOLTAGE
“L” OUTPUT VOLTAGE - OUTPUT CURRENT CHARACTERISTIC
VOH
3
2
VOL
1
1
0
20
40
60
80
0
100
INPUT VOLTAGE WAVEFORM (V)
4
4
Load line
RL=100Ω
3
Load line
RL=54Ω
VOC
2
VOD
1
1
0
20
40
60
80
SWITCHING CHARACTERISTIC
SWITCHING CHARACTERISTIC
2
D input
voltage
waveform
0
2
VCC=5V
Ta=25°C
–2
0
–4
0
20
40
60
80
DIFFERENTIAL OUTPUT DELAY TIME tDD,
DIFFERENTIAL OUTPUT TRANSITION TIME tTD (ns)
3
2
OUTPUT CURRENT IO (mA)
Y-Z
Differential output
voltage waveform
5
4
OUTPUT CURRENT SOURCE IO (mA)
4
6
10
VCC=5V
Ta=25°C
5
0
I/O VOLTAGE WAVEFORM (V)
0
“L” OUTPUT VOLTAGE VLO (V)
4
DIFFERENTIAL OUTPUT VOLTAGE WAVEFORM (V)
“H” OUTPUT VOLTAGE VOH (V)
5
4
2
8
DIFFERENTIAL OUTPUT VOLTAGE
IN-PHASE OUTPUT VOLTAGE - OUTPUT CURRENT CHARACTERISTIC
DIFFERENTIAL OUTPUT VOLTAGE VOD (V)
VCC=5V
Ta=25°C
3
6
SUPPLY VOLTAGE VCC (V)
AMBIENT TEMPERATURE Ta (°C)
5
4
IN-PHASE OUTPUT VOLTAGE VOC (V)
POWER DISSIPATION Pd (mW)
50
8P4 Unit
0
100
VCC=5V
Ta=25°C
6
Y output voltage waveform
4
2
D input
voltage
waveform
Z output voltage waveform
0
0
20
40
60
80
OUTPUT “L-H” PROPAGATION DELAY TIME tPLH,
OUTPUT “H-L” PROPAGATION DELAY TIME tPHL (ns)
7
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
RECEIVER
I/O TRANSMISSION CHARACTERISTIC (A→R)
INPUT CURRENT - INPUT VOLTAGE CHARACTERISTIC (A)
2.4
INPUT CURRENT II (mA)
VIC=0V
OUTPUT VOLTAGE VO (V)
B=0V
Ta=25°C
VCC=5V
IO=0mA
Ta=25°C
5
4
3
VIC=–7V
2
VIC=12V
1
1.6
0.8
0
VCC=5V
VCC=0V
–0.8
–1.6
0
–160
–80
0
80
160
–20
INPUT VOLTAGE VID (mV)
VID=0.2V
Ta=25°C
VCC=4.75V
2
1
0
–40
–60
–80
0.4
VCC=4.75V
5V
5.75V
0.3
0.2
0.1
–100
0
4
8
12
16
“H” OUTPUT CURRENT IOH (mA)
“L” OUTPUT CURRENT IOL (mA)
SWITCHING CHARACTERISTIC
SWITCHING CHARACTERISTIC
VCC=5V
B=1.5V
Ta=25°C
6
I/O VOLTAGE WAVEFORM (V)
I/O VOLTAGE WAVEFORM (V)
–20
R output voltage waveform
A input
voltage
waveform
2
0
0
20
40
60
80
OUTPUT “L-H” PROPAGATION DELAY TIME tPLH (ns)
8
VID=–0.2V
Ta=25°C
0
0
4
20
“L” OUTPUT VOLTAGE - “L” OUTPUT CURRENT CHARACTERISTIC
“L” OUTPUT VOLTAGE VOL (V)
“H” OUTPUT VOLTAGE VOH (V)
VCC=5V
3
10
0.5
VCC=5.25V
4
0
INPUT VOLTAGE VI (V)
“H” OUTPUT VOLTAGE - “H” OUTPUT CURRENT CHARACTERISTIC
5
–10
20
VCC=5V
B=1.5V
Ta=25°C
6
R output voltage waveform
4
2
A input
voltage
waveform
0
0
20
40
60
80
OUTPUT “H-L” PROPAGATION DELAY TIME tPHL (ns)
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
APPLICATION EXAMPLE
M75177P
M75176P
M75176P
Data input
Data output
RT
RT
RT
Data output
RT
Data input
M75178P
Data output Data input
RT=Terminal resistor
M75176P
9