bus receiver. DM7837 Datasheet

DM7837 receiver. Datasheet pdf. Equivalent


Part DM7837
Description hex unified bus receiver
Feature Line Drivers/Receivers DM7837/DM8837 hex unified bus receiver general description The DM7837/DM883.
Manufacture National Semiconductor
Datasheet
Download DM7837 Datasheet


Line Drivers/Receivers DM7837/DM8837 hex unified bus receiv DM7837 Datasheet
Recommendation Recommendation Datasheet DM7837 Datasheet




DM7837
Line Drivers/Receivers
DM7837/DM8837 hex unified bus receiver
general description
The DM7837/DM8837 are high speed receivers de-
signed for use in bus organized data transmission
systems Interconnected by terminated 120n Im-
pedance lines. The external termination is intend-
ed to be 180[2 reSIStor from the bus to the +5V
logic supply together with a 390[2 resistor from
the bus to ground. The receiver design employs a
built-in Input hysteresIs providing substantial nOise
Immunity. Low input current allows up to 27 driv-
er/receiver pairs to utilize a common bus. Disable
Inputs provide time discriminatIOn. Disable Inputs
and receiver outputs are DTL/TTL compatible.
Performance is optimized for systems with bus
rISe and fall times::::: lOllS.
features
• Low receiver Input current for normal V cc or
Vee = OV (1511A typ)
• Six separate receivers per package
• Built-in receiver input hysteresis (lV typ)
• High receiver nOise immunity (2V typ)
• Temperature insensitive receiver Input thres-
holds track bus logic levels
• DTLlTTL compatible disable and output
• Molded or cavity dual-in-Ilne or flat package
• High speed
sc:
"CO
W
"......
sC:
CO
00
W
"
typical application
.5V
390!1
120n Unified Data Bus
--, r-
II
II
II
I
_...1
--,
I
I
I
I
_...J
'5V
180!1
3901]
connection diagram
Dual·ln·Line and Flat Package
Vee IN 1 OUT 1 IN 2 OUT 2 IN 3 OUT 3 DISABLE A
IN 4 OUT 4 IN 5 OUT 5 IN 6 OU16 DISABLE 8 GNO
Order Number DM7837J
or DM8837J
See Packago 17
TOP VIEW
Order Number DM8837N
So. Package 23
Order Number DM7837W
or DM8837W
See Package 28
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DM7837
absolute maximum ratings (Note 1)
Supply Voltage
Input Voltage
Power Dissipation
Operating Temperature Range
DM7837
DM8837
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
7V
5.5V
600mW ....
_55.°C; to +125°C
O°C to +70°C
_65°C to +150°C.....
300°Ci .
electrical characteristics
The following apply for V L ~ Vcc ~ V H, T L ~ T A ~ T H, unless otherwise specified (Note 2)
PARAMETER
RECEIVER
INPUT
DISABLE
INPUT
High Level Receiver Threshold DM7837
High Level Receiver Threshold DM8837
Low Level Receiver Threshold DM7837
low Level Receiver Threshold DM8837
Maximum Receiver Input Current
V'H
V'H
V'H
V'H
4V
08V
08V
08V
08V
Maximum Receiver Input Current
Logic "1" Input Voltage Disable
Logic "0" Input Voltage Disable
Logic "1" Output Voltage
Logic "0" Output Voltage
4V
o 5V
05V
o 5V
4V
V"
V"
o8V
o 8V
Logic "1" Input Current Disable
24V
Logic "1" Input Current Disable
55V
Logic "0" Input Current Disable
Output Short CircUit Current
4V
o 5V
04V
OV
Power Supply Current
4V OV
Input Clamp Diode
-12 mA
-t2 mA
The follOWing apply for Vee = 5V, T A" 25"C unless otherWise specified
Propagation Delays
Receiver Input to Logic "1" Output
OV
Receiver Input to Logic "0" Output
OV
Olsable Input to Logic "1" Output
OV
Olsable Input to LogIc "0" Output
OV
OUTPUT
l6mA
16 mA
-400 rnA
-400 mA
16 mA
-400 pA
-400 IJA
l6mA
COMMENTS
Output < 0 4V
Output < 0 4V
Output> 2 4V
Output> 2 4V
Vee· V H
Vee OV
Output < 0 4V
Output> 24V
OV Vee'" V H
Per Package
TA '" 2S"C
Note 3
Note 4
Note S
Note 5
MIN
165
180
0.97
1.05
20
24
-180
TYP
225
225
130
130
150
10
025
45.0
-10
MAX
265
250
163
155
500
500
08
04
800
20
-32
-550
600
-15
UNIT
V
V
V
V
"A
"A
V
V
V
V
"A
mA
mA
mA
mA
V
20 30
18 30
9 15
4 10
ns
ns
ns
ns
Note 1: Voltage values are with respect to network ground terminal. Positive current is defined as current into the referenced pin.
Note 2: For DM7837: V L = 4.5V, V H = 5.5V, TL = _55°C, TH = +125°C
For DM8837: VL = 4.75V, VH = 5.25V, TL = O°C, TH =+70°C
Note 3: Fan·out of 10 load, CLOAD = 15 pF total. Measured from V,N = 1.3V to VOUT = 1.5V, V,N = OV to 3V pulse.
Note 4: Fan-out of 10 load, CLOAD = 15 pF total. Measured from V,N = 2.3V to VOUT = 1.5V, V,N = OV to 3V pulse.
Not. 5: Fan-out of 10 load, CLO AD = 15 pF total. Measured from V1N = 1.5V to VOUT = 1.5V, V,N = OV to 3V pulse.
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