TL F 9615
DS26F32CDS26F32M
Quad
Differential
Line
Receiver
January 1996
DS26F32C DS26F32M
Quad Differential Line Receiver
General Description
The DS26F32 is a quad differential line receiver designed to
meet the requirements of EIA Standards RS-422 and RS-
423 and Federal Standards 1020 and 1030 for balanced
and unbalanced digital data transmission
The DS26F32 offers improved performance due to the use
of state-of-the-art L-FAST bipolar technology The L-FAST
technology allows for higher speeds and lower currents by
utilizing extremely short gate delay times
Thus
the
DS26F32 features lower power
extended temperature
range and improved specifications
The device features an input sensitivity of 200 mV over the
input common mode range of
g
7 0V The DS26F32 pro-
vides an enable function common to all four receivers and
TRI-STATE
outputs with 8 0 mA sink capability Also a
fail-safe input output relationship keeps the outputs high
when the inputs are open
The DS26F32 offers optimum performance when used with
the DS26F31 Quad Differential Line Driver
Features
Y
Military temperature range
Y
Input voltage range of
g
7 0V (differential or common
mode)
g
0 2V sensitivity over the input voltage range
Y
Meets all the requirements of EIA standards RS-422
and RS-423
Y
High input impedance (18k typical)
Y
30 mV input hysteresis
Y
Operation from single
a
5 0V supply
Y
Input pull-down resistor prevents output oscillation on
unused channels
Y
TRI-STATE outputs with choice of complementary en-
ables for receiving directly onto a data bus
Y
Propagation delay 15 ns typical
Connection Diagrams
16-Lead DIP
TL F 9615 1
Top View
Order Number DS26F32CJ or DS26F32MJ
See NS Package Number J16A
For Complete Military 883 Specifications
see RETS Datasheet
Order Number DS26F32ME 883
DS26F32MJ 883 or DS26F32MW 883
See NS Package Number E20A J16A or W16A
20-Lead Ceramic Leadless Chip Carrier
TL F 9615 7
Function Table
(Each Receiver)
Differential Inputs
Enables
Outputs
V
ID
e
(V
IN
a
)
b
(V
IN
b
)
E
E
OUT
V
ID
t
0 2V
H
X
H
X
L
H
V
ID
s
b
0 2V
H
X
L
X
L
L
X
L
H
Z
H
e
High Level
L
e
Low Level
X
e
Immaterial
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1996 National Semiconductor Corporation
RRD-B30M36 Printed in U S A
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
Storage Temperature Range
Ceramic DIP
b
65 C to
a
175 C
Operating Temperature Range
DS26F32M
b
55 C to
a
125 C
DS26F32C
0 C to
a
70 C
Lead Temperature
Ceramic DIP (soldering 60 sec)
300 C
Maximum Power Dissipation at 25 C
Cavity Package
1500 mW
Supply Voltage
7 0V
Derate cavity package 10 mW C above 25 C
Common Mode Voltage Range
g
25V
Differential Input Voltage
g
25V
Enable Voltage
7 0V
Output Sink Current
50 mA
Operating Range
DS26F32C
Temperature
0 C to
a
70 C
Supply Voltage
4 75V to 5 25V
DS26F32M
Temperature
b
55 C to
a
125 C
Supply Voltage
4 5V to 5 5V
Electrical Characteristics
Over operating range unless otherwise specified (Notes 2 and 3)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
TH
Differential Input Voltage
b
7 0V
s
V
CM
s
a
7 0V
b
0 2
g
0 06
a
0 2
V
V
O
e
V
OL
or V
OH
R
I
Input Resistance
b
15V
s
V
CM
s
a
15V
14
18
kX
One Input AC Ground
I
I
Input Current (under Test)
V
I
e a
15V
2 3
Other Input
b
15V
s
V
I
s
a
15V
mA
V
I
e b
15V
b
2 8
Other Input
b
15V
s
V
I
s
a
15V
V
OH
Output Voltage HIGH
V
CC
e
Min
0 C to
a
70 C
2 8
3 4
D
V
I
e a
1 0V
V
V
ENABLE
e
0 8V
b
55 C to
a
125 C
2 5
3 4
I
OH
e b
440 mA
V
OL
Output Voltage LOW
V
CC
e
Min
I
OL
e
4 0 mA
0 4
D
V
I
e b
1 0V
0 45
V
I
OL
e
8 0 mA
V
ENABLE
e
0 8V
V
IL
Enable Voltage LOW
0 8
V
V
IH
Enable Voltage HIGH
2 0
V
V
IC
Enable Clamp Voltage
V
CC
e
Min I
I
e b
18 mA
b
1 5
V
I
OZ
Off State (High Impedance)
V
CC
e
Max
V
O
e
2 4V
20
m
A
Output Current
V
O
e
0 4V
b
20
I
IL
Enable Current LOW
V
I
e
0 4V
b
0 2
b
0 36
mA
I
IH
Enable Current HIGH
V
I
e
2 7V
0 5
10
m
A
I
I
Enable Input High Current
V
I
e
5 5V
1 0
50
m
A
I
OS
Output Short Circuit Current
V
O
e
0V V
CC
e
Max (Note 4)
b
15
b
50
b
85
mA
D
V
I
e a
1 0V
I
CC
Supply Current
V
CC
e
Max All V
I
e
GND
30
50
mA
Outputs Disabled
V
HYST
Input Hysteresis
T
A
e
25 C V
CC
e
5 0V V
CM
e
0V
30
mV
Note 1
``Absolute Maximum Ratings'' are those values beyond which the safety of the device cannot be guaranteed They are not meant to imply that the devices
should be operated at these limits The tables of ``Electrical Characteristics'' provide conditions for actual device operation
Note 2
Unless otherwise specified min max limits apply across the
b
55 C to
a
125 C temperature range for the DS26F32M and across the 0 C to
a
70 C range
for the DS26F32C All typicals are given for V
CC
e
5V and T
A
e
25 C
Note 3
All currents into the device pins are positive all currents out of the device pins are negative All voltages are reference to ground unless otherwise
specified
Note 4
Only one output at a time should be shorted
http
www national com
2
Switching Characteristics
V
CC
e
5 0V T
A
e
25 C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
t
PLH
Input to Output
Figures 2 3
C
L
e
15 pF
15
22
ns
t
PHL
Input to Output
15
22
ns
t
LZ
Enable to Output
C
L
e
5 pF
14
18
ns
t
HZ
Enable to Output
Figures 2 4
15
20
ns
t
ZL
Enable to Output
C
L
e
15 pF
13
18
ns
t
ZH
Enable to Output
12
16
ns
TL F 9615 2
FIGURE 1 Logic Symbol
TL F 9615 3
TL F 9615 4
FIGURE 2 Load Test Circuit for Three-State Outputs
FIGURE 3 Propagation Delay (Notes 1 2 and 3)
TL F 9615 5
FIGURE 4 Enable and Disable Times (Notes 1 2 and 3)
Note 1
Diagram shown for ENABLE Low
Note 2
S1 and S2 of Load Circuit are closed except where shown
Note 3
Pulse Generator of all Pulses Rate
s
1 0 MHz Z
O
e
50X t
r
s
6 0 ns t
f
s
6 0 ns
Note 4
All diodes are IN916 or IN3064
Note 5
C
L
includes probe and jig capacitance
http
www national com
3
Typical Application
TL F 9615 6
FIGURE 5
Physical Dimensions
inches (millimeters)
Order Number DS26F32ME 883
NS Package Number E20A
http
www national com
4
Physical Dimensions
inches (millimeters) (Continued)
Ceramic Dual-In-Line Package (J)
Order Number DS26F32CJ DS26F32MJ or DS26F32MJ 883
NS Package Number J16A
http
www national com
5
DS26F32CDS26F32M
Quad
Differential
Line
Receiver
Physical Dimensions
inches (millimeters) (Continued)
Order Number DS26F32MW 883
NS Package Number W16A
LIFE SUPPORT POLICY
NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
2 A critical component is any component of a life
systems which (a) are intended for surgical implant
support device or system whose failure to perform can
into the body or (b) support or sustain life and whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system or to affect its safety or
with instructions for use provided in the labeling can
effectiveness
be reasonably expected to result in a significant injury
to the user
National Semiconductor
National Semiconductor
National Semiconductor
National Semiconductor
Corporation
Europe
Hong Kong Ltd
Japan Ltd
1111 West Bardin Road
Fax a49 (0) 180-530 85 86
13th Floor Straight Block
Tel 81-043-299-2308
Arlington TX 76017
Email europe support nsc com
Ocean Centre 5 Canton Rd
Fax 81-043-299-2408
Tel 1(800) 272-9959
Deutsch Tel a49 (0) 180-530 85 85
Tsimshatsui Kowloon
Fax 1(800) 737-7018
English
Tel a49 (0) 180-532 78 32
Hong Kong
Fran ais Tel a49 (0) 180-532 93 58
Tel (852) 2737-1600
http
www national com
Italiano
Tel a49 (0) 180-534 16 80
Fax (852) 2736-9960
National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications
PDF 
ZIP