line receiver. DM7820 Datasheet

DM7820 receiver. Datasheet pdf. Equivalent

Part DM7820
Description dual line receiver
Feature Line 0 rivers/Receivers OM7820/0M8820 dual line receiver general description The DM7820, specifie.
Manufacture National Semiconductor
Datasheet
Download DM7820 Datasheet

Line 0 rivers/Receivers OM7820/0M8820 dual line receiver g DM7820 Datasheet
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DM7820
Line 0 rivers/Receivers
OM7820/0M8820 dual line receiver
general description
The DM7820, specified from ·55°e to 125°e, and
the DM8820, specified from oOe to 70oe, are
digital line receivers with two completely indepen'
dent units fabricated on a single silicon chip.
Intended for use with digital systems connected
by twisted pair lines, they have a differential input
designed to reject large common mode signals while
responding to small differential signals. The output
is directly compatible with RTL, DTL or TTL
integrated circuits.
features
• Operation from a single +5V logic supply
• Input voltage range of ±15V
• Each channel can be strobed independently
• High input resistance
• Fanout of two with either DTL or TTL
integrated circuits
The response time can be controlled with an ex·
ternal capacitor to eliminate noise spikes, and the
output state is determined for open inputs. Ter·
mination resistors for the twisted pair line are
also included in the circuit. Both the DM7820 and
the DM8820 are specified, worst case, over their
full operating temperature range, for ±10·percent
supply voltage variations and over the entire input
voltage range.
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, schematic and connection diagrams
.... -IlION.IIVERTING
''''UT
-TERMINATIOIiI
n".
INVERTING
'.PUT
..RI
R(SPONSETIME
CONTROl
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STROlE
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Dual-ln·Line and Flat Package
INPUT-"--.f---i-
URC.!lNATiQN
IN'UT
RESPONSE TIME
DUtf'UT -=--1----1
AESPOIliSETIME
GROUND
L--+-'_OUTPUT
TO' VIEW
Order Number DM7820J Dr DM8820J
See Package 16
Order, Number DM8820N
See Package 22
Order Number DM7820W or DM8820W
See Package 27
typical application
LINE DRIVER AND RECEIVER:::
1/2DM7830
TWISTED PAIR LINE
tVee IS 4 5V to 5 5V for both the
DM78201ndDM783D.
tExactvaluadepandsonlmelength
*OpbonaltoGontrol response time
OUTPUT
STADBE
4·1



DM7820
0
N
:eCO
CO
absolute maximum ratings
C
.......
Supply Voltage
0 Input Voltage
N
CO
Differential Input Voltage
.... Strobe Voltage
:e Output Sink Current
C Power Dissipation (Note 1)
Operating Temperature Range
DM7820
DM8820
Storage Temperature Range
Lead Temperature (Soldering. 10 sec)
8.0V
±20V
±20V
8.0V
25mA
600mW
-55°C to +125°C
O°C to +70°C
-65°C to +150°C
300°C
electrical characteristics (Notes 2 & 3)
PARAMETER
Input Threshold Voltage
High Output Level
Low Output Level
Inverting Input Resistance
Non-inverting Input Resistance
Line Termination Resistance
Response Ti me
Strobe Current
Power Supply Current
Non-inverting Input Current
Inverting Input Current
CONDITIONS
VIN ~ 0
-15V::;V II,::; 15V
lOUT::; 0.2 mA
I'ink ::; 3.5 mA
T A ~ 25°C
Cdelay ~ 0
Cdelay ~ 100 pF
V strobe ~O.4V
Vstrobe ~ 5.5V
VIN ~ 15V
VIN ~ 0
VIN~-15V
VIN ~ 15V
VIN ~ 0
VIN ~ -15V
VIN ~ 15V
VIN ~ 0
VIN = -15V
MIN
-0.5
-1.0
2.5
0
3.6
1.8
120
-1.6
-9.8
-4.2
TYP
0
0
5.0
2.5
170
40
150
1.0
3.2
5.8
8.3
5.0
-1.0
-7.0
3.0
0
-3.0
Note 1: For operating at elevated temperatures, the device must be derated based on a
thermal resistance of 1000 C/W and a maximum JunctIon temperature of 160°C for the
DM7820 or 105°e for the DM8820.
Note 2: These specifications apply for 4.5V::;: Vee::;: 5 5V. -15V::;: V CM ::;: 15V and
e_55°e::;: TA ::;: 125°e for the DM7820 of oOe::;: TA ::;: 70D for the DM8820 unless
otherwise specified; tYPical values given are for Vee:;; 5.0V, TA = 2SoC and V CM = 0
unless stated differently.
Note 3: The specifications and curves gIven are for one Side only Therefore, the total
package dissipation and supply currents will be double the values given when both
receivers are operated under identical conditions.
4-2
MAX
0.5
1.0
5.5
0.4
250
1.4
-5.0
6.0
10.2
15.0
7.0
4.2
-0.5
UNITS
V
V
V
V
kQ
kQ
Q
ns
ns
mA
J1A
mA
mA
mA
mA
mA
mA
mA
mA
mA





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