NSC DS8837N, DS8837M Datasheet
DS7837/DS8837 Hex Unified Bus Receiver
DS7837/DS8837 Hex Unified Bus Receiver
February 1996
General Description
The DS7837/DS8837 are high speed receivers designed for
use in bus organized data transmission systems interconnected by terminated 120X impedance lines. The external
termination is intended to be 180X resistor from the bus to
a
the
5V logic supply together with a 390X 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 driver/receiver pairs to utilize a common bus. Disable inputs provide time discrimination. Disable
inputs and receiver outputs are TTL compatible. Performance is optimized for systems with bus rise and fall times
s
1.0 ms/V.
Typical Application
Connection Diagram
Dual-In-Line Package
Features
Y
Low receiver input current for normal VCCor V
(15 mA typ)
Y
Six separate receivers per package
Y
Built-in receiver input hysteresis (1V typ)
Y
High receiver noise immunity (2V typ)
Y
Temperature insensitive receiver input thresholds track
bus logic levels
Y
TTL compatible disable and output
Y
Molded or cavity dual-in-line or flat package
Y
High speed
CC
TL/F/5811– 1
e
0V
Top View
Order Number DS7837J, DS8837M or DS8837N
See NS Package Number J16A, M16A or N16A
C
1996 National Semiconductor Corporation RRD-B30M36/Printed in U. S. A.
TL/F/5811
TL/F/5811– 2
http://www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage 7V
Input Voltage 5.5V
Operating Temperature Range
DS7837
DS8837 0
Storage Temperature Range
Maximum Power Dissipation* at 25
Cavity Package 1433 mW
Molded DIP Package 1362 mW
SO Package 1002 mW
Lead Temperature (Soldering, 4 seconds) 260
*Derate cavity package 9.6 mW/§C above 25§C; derate molded DIP package
C above 25§C; derate SO package 8.01 mW/§C above 25§C.
10.9 mW/
§
b
b
C
§
55§Ctoa125§C
Ctoa70§C
§
65§Ctoa150§C
Operating Conditions
Supply Voltage, (V
DS7837 4.5 5.5 V
CC
DS8837 4.75 5.25 V
Temperature (T
DS7837
)
A
DS8837 0
C
§
Min Max Units
)
b
55
a
125
a
70
C
§
C
§
Electrical Characteristics
s
The following apply for V
MIN
s
V
V
CC
MAX,TMIN
Symbol Parameter Conditions Min Typ Max Units
V
TH
V
TL
I
IH
I
IL
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
I
OS
I
CC
V
CL
High Level Receiver Threshold V
Low Level Receiver Threshold V
Maximum Receiver Input Current V
Logical ‘‘0’’ Receiver Input Current V
Logical ‘‘1’’ Input Voltage Disable 2.0 V
Logical ‘‘0’’ Input Voltage Disable 0.8 V
Logical ‘‘1’’ Input Current Disable Input V
Logical ‘‘0’’ Input Current V
Logical ‘‘1’’ Output Voltage V
Logical ‘‘0’’ Output Voltage V
Output Short Circuit Current V
Power Supply Current V
Input Clamp Diode V
s
s
T
T
, unless otherwise specified (Notes 2 and 3)
MAX
Max DS7837 1.65 2.25 2.65 V
CC
A
e
DS8837 1.80 2.25 2.50 V
e
Min DS7837 0.97 1.30 1.63 V
CC
DS8837 1.05 1.30 1.55 V
e
4V V
IN
e
0.4V, V
IN
e
4V, V
IN
e
0.5V, V
IN
eb
I
400 mA
OH
e
4V, V
IN
e
0.5V, V
IN
e
V
V
CC
MAX
e
4V, V
IN
eb
12 mA, V
IN
e
25§C
T
A
e
V
CC
e
0.4V, Disable Input
IND
e
0.8V,
IND
e
0.8V, I
IND
e
0V, V
IND
, (Note 4)
e
0V, (Per Package) 45.0 60.0 mA
IND
IND
MAX
eb
e
V
CC
MAX
e
V
0V 1.0 50.0 mA
CC
15.0 50.0 mA
1.0 50.0 mA
e
2.4V 80.0 mA
IND
e
V
5.5V 2.0 mA
IND
2.4 V
e
16 mA 0.25 0.4 V
OH
e
0V,
OS
12 mA,
b
18.0
b
1.0
b
3.2 mA
b
55.0 mA
b
1.5 V
http://www.national.com 2
Loading...