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PDF M75179P Data sheet ( Hoja de datos )
| Número de pieza | M75179P | |
| Descripción | RS-485 TRANSCEIVER | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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MITMSITUSBUISBHISI H〈DI I〈GDIITGAITLAALSASSPS〉 P〉
M75176MP7,5M1767P5, M1775717P7P
M75178MP7,5M1787P5, M1775917P9P
RSR-4S8-548T5RTARNASNCSECIVEEIVRER
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
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 im-
pedance at the power-OFF time goes high.
PIN CONFIGURATION (TOP VIEW)
RECEIVER OUTPUT R ← 1
RECEIVER OUTPUT
CONTROL INPUT
RE →
2
DRIVER OUTPUT
CONTROL INPUT
DE →
3
DRIVER INPUT D → 4
8 VCC
7 ↔B
6 ↔A
I/O BUS
5 GND
M75176P
VCC 1
REPEATER OUTPUT T ← 2
OUTPUT CONTROL INPUT EN → 3
GND 4
8 ←A
7 ←B
RECEIVER INPUT
6 →Z
5 →Y
DRIVER OUTPUT
M75177P
VCC 1
REPEATER OUTPUT T ← 2
OUTPUT CONTROL INPUT EN → 3
GND 4
8 ←A
7 ←B
RECEIVER INPUT
6 →Z
5 →Y
DRIVER OUTPUT
M75178P
VCC 1
RECEIVER OUTPUT R ← 2
DRIVER INPUT D → 3
GND 4
8 ←A
7 ←B
RECEIVER INPUT
6 →Z
5 →Y
DRIVER OUTPUT
M75179P
Outline 8P4
1
1 page  
TEST CIRCUITS
Fig. 1
MITSUBISHI 〈DIGITAL ASSP〉
M75176P, M75177P
M75178P, M75179P
RS-485 TRANSCEIVER
VOD2
RL / 2
RL / 2
VOC
Driver differential output voltage 2, in-phase output voltage
Fig. 2
P.G.
(Note 5)
Input
1.5V
3V
1.5V
Input
RL Output
CL
(Note 6)
0V
tDD tDD
50Ω
3V
(M75178P is 0V)
Test circuit
Output
50%
90%
50%
10%
tTD tTD
I/O waveform
Driver differential output delay time and transition time
Fig. 3
P.G.
(Note 5)
Input
50Ω
3V
(M75178P is 0V)
Test circuit
2.3V
RL
Output
CL
(Note 6)
Driver delay time
Input
1.5V
3V
1.5V
tPLH
2.3V
0V
tPHL
VOH
2.3V
Output
tPHL
tPLH
2.3V
VOL
VOH
2.3V
I/O waveform
VOL
Fig. 4
0V or 3V
P.G.
(Note 5)
Input
50Ω
Test circuit
Output
CL
(Note 6)
RL
(M75178P)
Input
(M75176/177P)
Output
Driver enable/disable time
1.5V
tPZH
3V
1.5V
0V
tPHZ
0.5V
2.3V
I/O waveform
VOH
0V
Fig. 5
3V or 0V
5V
RL
Output
(M75178P)
Input
(M75176/177P)
P.G.
(Note 5)
Input
50Ω
CL
(Note 6)
Output
Test circuit
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.
1.5V
tPZL
1.5V
tPLZ
3V
0V
2.3V
I/O waveform
5V
0.5V
VOL
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet M75179P.PDF ] | |
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