KII_NM485SLC Datasheet, PDF (1/6 Pages) Murata Manufacturing Co., Ltd. – Low Power Isolated EIA-485 Driver and Receiver

NM485SLC
Low Power Isolated EIA-485 Driver and Receiver
FEATURES
RoHS compliant
Site compatible with NM485D
Single 5V supply
Thermal shutdown protection
EIA-485 and CCITT V.10 & V.11 compatible
Differential driver and receiver
Driver tri-state outputs active high enable
Low Profile 24 pin DIL package style
1kVrms Isolation
Thermal shutdown protection
DESCRIPTION
The NM485SLC is a low power electrically iso-
lated differential driver and receiver designed for
bi-directional data communication or multipoint
bus transmission at rates up to 2.5Mbits per
second. The device combines a tri-state dif-
ferential 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. The receiver features a high output state
when the inputs are left open. Thermal shutdown
protection forces the driver into a high imped-
ance state, under line fault conditions. No external
components are needed as a single 5V supply
powers all functions either side of the isolation
boundary. The device is supplied in a low profile
24 pin plastic package.
Ḥ
For full details go to
www.murata-ps.com/rohs
ELECTRICAL CHARACTERISTICS
Parameter
Supply voltage, VCC
Isolated reference voltage, VREF
+VREF Current
High level input voltage, VIH
Low level input voltage, VIL
Common mode output voltage, VOC
High level output current IOH
Low level output current, IOL
Common mode input voltage, VIC
Differential input voltage, VID
High level output current, IOH
Low level output current, IOL
Test conditions
RL=54Ω
D ENABLE, R ENABLE and DIN
Driver
Receiver
RECEIVER ELECTRICAL CHARACTERISTICS
Parameter
Test conditions
High threshold differential input, VTH VO=2.7V, IO=-0.4mA
Low threshold differential input, VTL VO=0.5V, IO=16mA
Input hysteresis, ΔVT
High level output voltage, VOH
VID=200mV, IOH=-5.0mA
Low level output voltage, VOL
VID=-200mV, IOL=25mA
Line input current, II
Other input at 0V, VI=12V
Other input at 0V, VI=-7.0V
Short circuit output current, IOS
Input resistance, RI
RECEIVER SWITCHING CHARACTERISTICS
Parameter
Test conditions
Propagation delay time L to H, TPLH VID=-1.5V to 1.5V, CL=15pF
Propagation delay time H to L, TPHL
Output disable time from high level CL=15pF
Output disable time from low level CL=15pF
Output enable time to high level
CL=15pF
Output enable time to low level
CL=15pF
RECEIVER FUNCTION TABLE
Differential inputs A-B
VID≥0.2V
-0.2V<VID<+0.2V
VID≤-0.2V
Irrelevant
R ENABLE
Low level
Low level
Low level
High level
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage
Isolation capacitance
Conditions
Flash tested for 1 second
ABSOLUTE MAXIMUM RATINGS
Supply voltage VCC with respect to pin 11
Input voltage D ENABLE, R ENABLE and DIN
Receiver differential input voltage range
Output voltage range, driver
Power dissipation
Data transmission rate
Lead temperature 1.5mm from case for 10 seconds
All data taken at TA=25°C, VCC=5V.
Min. Typ. Max. Units
4.75 5.0 5.25
V
5.0
25
mA
2.8
V
0.8
V
-7.0
12
V
-60
mA
60
mA
±12
V
±12
V
-5.0 mA
25
mA
Min. Typ. Max. Units
0.2
V
-0.2
V
70
mV
2.7
V
0.8
V
1.0
mA
-0.8
85
mA
12
KΩ
Min. Typ. Max. Units
150 180
ns
130 150
ns
90
150
ns
90
150
ns
130 150
ns
80
150
ns
ROUT
High level
Undefined
Low level
High level
Min. Typ. Max. Units
1000
Vrms
40
pF
7V
7V
-14V to +14V
-14V to +14V
1000mW
2.5Mbps
300ºC
www.murata-ps.com
Technical enquiries - email: [e-mail], tel: [phone]
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