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PDF NM485D6S5MC Data sheet ( Hoja de datos )
| Número de pieza | NM485D6S5MC | |
| Descripción | Isolated RS485 Driver DC/DC | |
| Fabricantes | muRata | |
| Logotipo |  |
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NM485D6S5MC
Isolated RS485 Driver DC/DC
6V
6V
Isolated DC-DC Power Supply 0V
-6V
5V
Regulator
0V
5V regulated
5V
0V
-6V
FEATURES
UL60950 recognition pending for 250Vrms
reinforced insulation
ANSI/AAMI ES60601-1, 2 MOOPs, 1 MOPP
recognition pending
Patents pending
SMD compatible
+6V, -6V unregulated and +5V regulated
isolated outputs
Differential driver and receiver
500kbps data rate
Complies with ANSI TIA/EIA RS-485-A-1998
and ISO 8482: 1987(E)
Industrial temperature range -40°C to
+85°C
Tested at 3000Vac rms ‘Hi Pot Test’
PRODUCT OVERVIEW
The NM485D6S5MC is a low power electrically
isolated differential driver and receiver designed
for bi-directional data communication or multipoint
bus transmission. The device combines a tri-state
differential line driver and a differential input line
receiver. The driver and receiver have active high
and active low enables, respectively, which can be
connected together to function as direction control.
No external components are needed as a single
5V supply powers all functions either side of the
isolation boundary. NM485D655MC also provides
a regulated 5V, unregulated 6V and -6V isolated
supply’s for system use.
Vcc
0V
input lines
output lines
Isolated 485 Tranceiver
3.3V
Regulator
output lines
input lines
SELECTION GUIDE
Order Code1
NM485D6S5MC
MODULE CHARACTERISTICS
DRIVER
Parameter
Differential Output
Voltages
Short Circuit Output
Current
Complementary
Output States
Common-mode
Output Voltages
Complementary
Output States
Input Threshold Low
Test conditions
Loaded RL = 100Ω (RS-422), See Figure 1
Loaded RL = 54Ω (RS-485)
RL = 54Ω or 100Ω, see figure 1
RL = 54Ω or 100Ω, see figure 1
RL = 54Ω or 100Ω, see figure 1
Input Threshold High
Input Current
RECEIVER2
Parameter
Differential Input
Threshold Voltages
Input Voltages
Hysteresis
Input Current (A, B)
Line Input Resistance
Tristate Leakage
Current
Output Voltage Low
Test conditions
-7V < VCM < +12V
VOC = 0V
-7V < VCM < +12V
Output Voltage High
Short-Circuit Current
Common-Mode
Transient Immunity
VCM = 1 kV, transient magnitude = 800V
ABSOLUTE MAXIMUM RATINGS
Supply voltage VCC with respect to pin 11
Bus Terminal Voltages
Logic Terminal Voltage
Data transmission rate
Min. Typ. Max. Units Symbol
2.0
3.6 V
VOD
1.5 3.6
250 mA
IOS
0.2 V Δ |VOD|
3.0 V
VOC
0.25 x
Vcc
-10 +0.01
0.2
0.7 x
VCC
+10
V
V
V
μA
Δ |VOC|
VIL
VIH
II
Min. Typ. Max. Units Symbol
-200 -125 -30 mV
VTH
15 mV VHYS
-100
+125 μA
II
96 kΩ RIN
±1 μA
IOZR
0.2 0.4
Vcc - Vcc -
0.3 0.2
100
V VOLRxD
V VOHRxD
mA
25 KV/μS
6V
-9V to +14V
-0.5V to Vcc +0.5V
500Kbps
For full details go to
www.murata-ps.com/rohs
1. Components are supplied in tape and reel packaging, please refer to tape and reel specification section. Orderable part numbers are
NM485D6S5MC-R7 (80 pieces per reel), or NM485D6S5MC-R13 (350 pieces per reel).
2. VCM is the common-mode potential difference between the logic and bus sides. The transient magnitude is the range over which the
common mode is slewed. The common-mode voltage slew rates apply to both rising and falling common-mode voltage edges.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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KDC_NM485D6S5MC.A01 age 1 of 11
1 page  
NM485D6S5MC
Isolated RS485 Driver DC/DC
APPLICATION NOTES
The increased use of balanced data transmission lines, (distributing data to several system components and peripherals over relatively long lines) has brought about the need for
multiple driver/receiver combinations on a single twisted pair line. This resulted in an upgraded version of EIA RS-422, named EIA-485. EIA-485 takes into account EIA RS-422
requirements for balanced line data transmission, and allows for multiple drivers and receivers.
The NM485D6S5MC is a low power isolated differential interface providing EIA-485 compatibility. The use of a differential communications interface such as the NM485D6S5MC
allows data transmission at high rates and over long distances to be accomplished. This is because effects of external noise sources and cross talk are much less pronounced
on the data signal. Any external noise source coupling onto the differential lines will appear as an extra common mode voltage which the receiver is insensitive to. The difference
between the signal levels on the two lines will therefore remain the same. Similarly a change in the local ground potential at one end of the line will appear as just another change
in the common mode voltage level of the signals. Twisted pair cable is commonly used for differential communications since its twisted nature tends to cause cancellation of the
magnetic fields generated by the current flowing through each wire, thus reducing the effective inductance of the pair.
Computer and industrial serial interfacing are areas where noise can seriously affect the integrity of data transfer, and a proven route to improve noise performance for any
interface system is galvanic isolation. Galvanic isolation removes the ground loop currents from data lines and hence the impressed noise voltage which affects the signal is also
eliminated. The isolation feature of the NM485D6S5MC also means that common mode noise effects are removed and many forms of radiated noise are reduced to negligible
limits.
Figure 10 demonstrates how the differential lines of the NM485D6S5MC can be connected to form a transceiver. Data direction is controlled by the driver enable and receiver
enable pins. This means the device can receive when the receiver enable is low and transmit when the driver enable is high. As the driver is active high, to reduce the power dis-
sipation even further, it is advisable to disable the driver when not transmitting data.
Configuring the NM485D6S5MC as a transceiver
The NM485D6S5MC is configured as a transceiver simply by connecting the inverting RB receive to the inverting DZ drive and the non-inverting RA receive to the non-
inverting DY drive. The data direction is determined by the driver enable pins (D ENABLE and R ENABLE), the transceiver acting as a transmitter when the enable pin is high
and a receiver when the enable pin is low.
FIGURE 10
MC68195
RDATA1 28
+5Vin
NM485D6S5MC
1 VCC
3 RxD
A
B
11
10
XEN1 27
5 D ENABLE
XDATA1 25
6 TxD
4 R ENABLE
2 GND
Z8
Y7
OV ISO GND 12
Isolation Barrier
Minimum load
The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result in
an increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.
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KDC_NM485D6S5MC.A01 age 5 of 11
5 Page 
TAPE & REEL SPECIFICATIONS
REEL OUTLINE DIMENSIONS
Ø330 [13.000]
OR
Ø178 [7.000]
1.5 [0.059]
MIN ##
[ ]Ø1123..55
Ø
0.531
0.492
38.4 [1.512] MAX #
NM485D6S5MC
Isolated RS485 Driver DC/DC
REEL PACKAGING DETAILS
LEADER SECTION
400 [15.748] MIN
100 [3.937]
MIN
GOODS
ENCLOSURE
SECTION
Ø20.2 [Ø0.795]
MIN
Tape & Reel specifications shall conform with current EIA-481 standard
Unless otherwise stated all dimensions in mm(inches)
Controlling dimension is mm
# Measured at hub
## Six equi-spaced slots on 180mm/7” reel
TAPE OUTLINE DIMENSIONS
1.75 [0.069]
Ø2.0 [Ø0.079] MIN
2.0 [0.079]
Carrier tape pockets shown are
illustrative only - Refer to carrier tape
diagram for actual pocket details.
Reel Quantity: 7” - 80 or 13” - 350
TRAILER SECTION
160 [6.299] MIN
4.0 [0.157]
[ ]Ø1.5
+0.1
-0.0
Ø0.059
+0.004
-0.000
COVER TAPE
0.5 [0.020]
3° MAX
Tape & Reel specifications shall conform with current EIA-481 standard
Unless otherwise stated all dimensions in mm(inches) ±0.1mm (±0.004 Inches)
Controlling dimension is mm
Components shall be orientated within the carrier tape as indicated
# Measured on a plane 0.3mm above the bottom pocket
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
www.murata-ps.com/support
15.0 [0.592]#
24.0 [0.945]
DIRECTION OF UNREELING
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2016 Murata Power Solutions, Inc.
KDC_NM485D6S5MC.A01 age 11 of 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet NM485D6S5MC.PDF ] | |
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