line receiver. DM8822 Datasheet

DM8822 receiver. Datasheet pdf. Equivalent

Part DM8822
Description dual line receiver
Feature N Nccoo Line Drivers IReceivers ::E .Q..... N N ~ ::E DM7822/DM8822 dual line receiver Q gen.
Manufacture National Semiconductor
Datasheet
Download DM8822 Datasheet

N Nccoo Line Drivers IReceivers ::E .Q..... N N ~ ::E DM8822 Datasheet
Recommendation Recommendation Datasheet DM8822 Datasheet




DM8822
N
Nccoo Line Drivers IReceivers
::E
.Q.....
N
N
~
::E
DM7822/DM8822 dual line receiver
Q general description
The DM7822/DM8822 is a dual Inverting Ime
receiver which meets the requirements of EIA
specification RS232 Revision B. The device con·
tams both receivers on a smgle monolithic silicon
chip. The receivers share common power supply
and ground connections, otherwise their operation
IS fully mdependent.
I n addition to meetmg the requirements of RS232,
the DM7822/DM8822 also has Independent strobe
mputs which allow the receiver to be placed In the
high state Independent of the Information being
received at tl;1e mput.
The output of the DM7822/DM8822 IS completely
compatible with five volt DTL and TTL logic
families
The DM7822 is specified for operation over the
-55°C to +125°e military temperature range. The
DM8822 is specified for operation over the oOe
to +70°C temperature range.
connection diagram
Vee INPUT
STROBE
D~TPUT
INPUT
STROBE
OUTPUT
*MllkenoconnlC1lontotheseplns
HFor o,.m.on requiring ''MIrk Hold" With the Input open connect a470n
I1ISIstonfrom ..... ofthmpmstoground
GNO
Ord... Number DM7822J
See Package 16
Order Number DM8822N
See Package 22
typical connection
TWISTED PAIR LINE
4·8
Rl'
*For Mark Hold R1 ;; 4700, otherwlS1lconnect Pin 3 to ground



DM8822
absolute maximum ratings
Supply Voltage
Input Voltage
Strobe Voltage
Output Sink Current
Power DISsipation (Note 1)
Operating Temperature Range DM7822
DM8822
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
8.0V
±30V
8.0V
25 mA
600 mW
_55D C to +125°C
O°C to 70°C
-65°C to +150°C
300°C
c
.3...:.
CO
N
.N....
c
3:
CO
CO
N
N
electrical characteristics (Note 2)
PARAMETER
PARAGRAPH IN
RS-232
CONDITIONS
MIN TYP
MAX
UNITS
Negative Input Threshold
Voltage
4.8 (B)
V OUT :::: 2.5V
-2.0
V
POSItive Input Threshold
Voltage (Note 3)
Input Resistance
VouT :":04V
4.5 and 4 B (5)
3.0 5.0
2.0
70
V
kSl
Input Current
Open Circuit Input Voltage 4.5 and 4.B (4)
Logical "1" Output Vol.tage
Logical "0" Output Voltage
Strobe Current
Power Supply Current
(Both Receivers)
Y'N = 25V
Y'N = OV
Y'N =-25V
Y'N = OV
lOUT:": -0.2 mA
lOUT = 3.5 mA
VSTROBE =0.4V
VSTROBE = 5.5V
-25V:": V ,N :": 25V
3.57 5
0
-B.33 -5
B.33
-3.57
.03 0.5
2.5
0.4
1.0
-5.0!-,A
1.4
-1.0 rnA
24.0
mA
mA
mA
V
V
V
mA
mA
Response Time. t, or t2
TA = 25°C
Vee = 5.0V
Input Ramp Rate:": 10 ns
65 125
ns
Note 1. For operating at elevated temperatures, the deVice must be derated In accordance with
the "MaXimum Power DISSipation" curve
Note 2. Mm/Max limits apply across the guaranteed temperature range of _55°C to +125°C for
ethe DM7822 and OoC to 700 for the DM8822 unless otherWise specified LikeWise the limits
apply across the guaranteed Vee range of 4.5V to 5.5V for the DM7822 and 475V to 5.25V
for the DM8822 unless otherWise specifIed. TYPical values are given for Vee = S.OV and
TA = 25°C
Note -3. Stnce the EIA RS-232 specification requires the threshold to be between -3V and +3V,
the Immunity limits shown here guarantee 1 volt additIOnal noise Immunity
4-9





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