NSC DS8935WMX, DS8935WM Datasheet
DS8935
LocalTalk
™
Dual Driver/Triple Receiver
General Description
The DS8935 is a dual driver/triple receiver device optimized
to provide a single chip solution for a LocalTalk Interface.
The device provides one differential TIA/EIA-422 driver,one
TIA/EIA-423 single ended driver, one TIA/EIA-422 receiver
and two TIA/EIA-423receivers, all in a surface mount 16-pin
package. This device is electrically similar to the 26LS30 and
26LS32 devices.
The drivers feature
±
10V common mode range, and the differential driver provides TRI-STATEable outputs. The receivers offer
±
200 mV thresholds over the±10V common mode
range.
The device offers enable circuitry for the differential driver
and selectable enabling for the three receivers.
Features
n Single chip solution for LocalTalk port
n Two driver/three receivers per package
n Wide common mode range:
±
10V
n
±
200 mV receiver sensitivity
n 70 mV typical receiver input hysteresis
n Available in SOIC packaging
n Failsafe receiver for open inputs
Connection Diagram Functional Diagram
TRI-STATE®is a registered trademark of National Semiconductor Corporation.
LocalTalk
™
is a trademark of Apple Computer, Inc.
Dual-In-Line Package
DS012066-1
Order Number DS8935WM
See NS Package Number M20B
DS012066-2
February 1996
DS8935 LocalTalk Dual Driver/Triple Receiver
© 1998 National Semiconductor Corporation DS012066 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 (V
CC
) +7V
Supply Voltage (V
EE
) −7V
Enable Input Voltage (D
EN1
, RE, RE ) +7V
Driver Input Voltage (D
IN
) +7V
Driver Output Voltage (Power Off: D
OUT
)
±
15V
Receiver Input Voltage (V
ID:RIN
+−RIN−)
±
25V
Receiver Input Voltage (V
CM
:(RIN++RIN−)/2)
±
25V
Receiver Input Voltage (Input to GND: R
IN
)
±
25V
Receiver Output Voltage (R
OUT
) +5.5V
Maximum Package Power Dissipation
@
+25˚C
M Package 1.34W
Derate M Package 10.7 mW/˚C above +25˚C
Storage Temperature Range −65˚C to
+150˚C
Lead Temperature Range (Soldering, 4 Sec.) +260˚C
This device does not meet 2000V ESD Rating (Note 8)
Recommended Operating
Conditions
Min Typ Max Units
Supply Voltage (V
CC
) +4.75 +5.0 +5.25 V
Supply Voltage (V
EE
) −4.75 −5.0 −5.25 V
Operating Free Air
Temperature (T
A
) 0 25 70 ˚C
Electrical Characteristics (Notes 2, 3)
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
Symbol Parameter Conditions Pin Min Typ Max Units
DIFFERENTIAL DRIVER CHARACTERISTICS
V
OD
Output Differential Voltage R
L
=
∞
or R
L
=
3.9 kΩ
D
OUT
+,
D
OUT
−
±
7
±
9.0
±
10 V
V
O
Output Voltage R
L
=
∞
or R
L
=
3.9 kΩ
±
4.5±5.25 V
V
OD1
Output Differential Voltage R
L
=
100Ω,
Figure 1
4.0 6.4 |V|
V
SS
|V
OD1−VOD1
| 8.0 12.8 |V|
∆V
OD1
Output Unbalance 0.02 0.4 V
V
OS
Offset Voltage 03V
∆V
OS
Offset Unbalance 0.05 0.4 V
V
OD2
Output Differential Voltage RL=140Ω,
Figure 1
6.0 7.0 |V|
I
OZD
TRI-STATE®Leakage Current V
CC
=
5.25V V
O
=
+10V 2 150 µA
V
EE
=
−5.25V V
O
=
+6V 1 100 µA
V
O
=
−6V −1 −100 µA
V
O
=
−10V −2 −150 µA
SINGLE ENDED DRIVER CHARACTERISTICS
V
O
Output Voltage (No Load) R
L
=
∞
or R
L
=
3.9 kΩ,
Figure 2
D
OUT
−
4 4.4 6 |V|
V
T
Output Voltage R
L
=
3kΩ,
Figure 2
3.7 4.3 |V|
R
L
=
450Ω,
Figure 2
3.6 4.1 |V|
∆V
T
Output Unbalance 0.02 0.4 V
DRIVER CHARACTERISTICS
V
CM
Common Mode Range Power Off, or D1 Disabled
D
OUT
+,
D
OUT
−
±
10 V
I
OSD
Short Circuit Current V
O
=
0V, Sourcing Current −80 −150 mA
V
O
=
0V, Sinking Current 80 150 mA
I
OXD
Power-Off Leakage Current V
O
=
+10V 2 150 µA
(V
CC
=
V
EE
=
0V) V
O
=
+6V 1 100 µA
V
O
=
−6V −1 −100 µA
V
O
=
−10V −2 −150 µA
www.national.com 2
Electrical Characteristics (Notes 2, 3) (Continued)
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
Symbol Parameter Conditions Pin Min Typ Max Units
RECEIVER CHARACTERISTICS
V
TH
Input Threshold −7V ≤ VCM≤ +7V
R
IN
+,
R
IN
−
−200
±
35 +200 mV
V
HY
Hysteresis V
CM
=
0V 70 mV
R
IN
Input Resistance −10V ≤ VCM≤ +10V 6.0 8.5 kΩ
I
IN
Input Current (Other Input=0V, V
IN
=
+10V 3.25 mA
Power On, or V
CC
=
V
EE
=
0V) V
IN
=
+3V 0 1.50 mA
V
IN
=
−3V 0 −1.50 mA
V
IN
=
−10V −3.25 mA
V
IB
Input Balance Test R
S
=
500Ω (R2 only)
±
400 mV
V
OH
High Level Output Voltage I
OH
=
−400 µA,
R
OUT
2.7 4.2 V
V
IN
=
+200 mV
I
OH
=
−400 µA, V
IN
=
OPEN 2.7 4.2 V
V
OL
Low Level Output Voltage I
OL
=
8.0 mA, V
IN
=
−200 mV 0.3 0.5 V
I
OSR
Short Circuit Current V
O
=
0V −15 −34 −85 mA
I
OZR
TRI-STATE Output Current V
CC
=
Max V
O
=
2.4V 0 +20 µA
V
O
=
0.4V 0 −20 µA
DEVICE CHARACTERISTICS
V
IH
High Level Input Voltage
D
IN
,
D
EN1
,
RE,
RE
2.0 V
V
IL
Low Level Input Voltage 0.8 V
I
IH
High Level Input Current V
IN
=
2.4V 1 40 µA
I
IL
Low Level Input Current V
IN
=
0.4V −10 −200 µA
V
CL
Input Clamp Voltage I
IN
=
−12 mA −1.5 V
I
CC
Power Supply Current No Load
D1 Enabled or Disabled
V
CC
40 65 mA
I
EE
V
EE
−5 −15 mA
Switching Characteristics (Notes 4, 5)
Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified
Symbol Parameter Conditions Min Typ Max Units
DIFFERENTIAL DRIVER CHARACTERISTICS
t
PHLD
Differential Propagation Delay High to Low R
L
=
100Ω,C
L
=
500 pF,
(
Figures 3, 4
)
C
1
=
C
2
=
50 pF
70 134 350 ns
t
PLHD
Differential Propagation Delay Low to High 70 141 350 ns
t
SKD
Differential Skew |t
PHLD−tPLHD
| 7 50 ns
t
r
Rise Time 50 140 300 ns
t
f
Fall Time 50 140 300 ns
t
PHZ
Disable Time High to Z R
L
=
100Ω,C
L
=
500 pF
(
Figures 7, 8
)
300 600 ns
t
PLZ
Disable Time Low to Z 300 600 ns
t
PZH
Enable Time Z to High 160 350 ns
t
PZL
Enable Time Z to Low 160 350 ns
SINGLE ENDED DRIVER CHARACTERISTICS
t
PHL
Propagation Delay High to Low R
L
=
450Ω,C
L
=
500 pF
(
Figures 5, 6
)
70 120 350 ns
t
PLH
Propagation Delay Low to High 70 150 350 ns
t
SK
Skew, |t
PHL−tPLH
30 70 ns
t
r
Rise Time 50 100 300 ns
t
f
Fall Time 20 50 300 ns
RECEIVER CHARACTERISTICS
t
PHL
Propagation Delay High to Low C
L
=
15 pF
(
Figures 9, 10
)
10 33 75 ns
t
PLH
Propagation Delay Low to High 10 30 75 ns
t
SK
Skew, |t
PHL−tPLH
| 320ns
www.national.com3
Switching Characteristics (Notes 4, 5) (Continued)
Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified
Symbol Parameter Conditions Min Typ Max Units
RECEIVER CHARACTERISTICS
t
HZ
Disable Time High to Z C
L
=
15 pF
(
Figures 9, 11
)
20 75 ns
t
LZ
Disable Time Low to Z 20 75 ns
t
ZH
Enable Time Z to High 20 75 ns
t
ZL
Enable Time Z to Low 20 75 ns
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 table of Electrical Characteristics specifies conditions of device operation.
Note 2: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except V
OD,VOD1
,
V
OD2
, and VSS.
Note 3: All typicals are given for: V
CC
=
+5.0V, V
EE
=
−5.0V, T
A
=
+25˚C unless otherwise specified.
Truth Tables
Driver (D1)
Inputs Outputs
D
EN1
D
IN1
D
OUT1
+D
OUT1
−
HX Z Z
LL L H
LH H L
Receiver (1)
RE RE Input Output
R
IN1
−R
OUT1
01 X Z
Any Other ≤−200 mV H
Combination ≥+200 mV L
Open
†
H
Driver (D2)
Input Output
D
IN2
D
OUT2
−
LH
HL
Receiver (2)
RE RE Inputs Output
R
IN2
+–R
IN2
−R
OUT2
01 X Z
Any Other ≤−200 mV L
Combination ≥+200 mV H
Open
†
H
Receiver (3)
RE RE Input Output
R
IN3
+R
OUT3
01 X Z
Any Other ≤−200 mV L
Combination ≥+200 mV H
Open
†
H
H=Logic High Level (Steady State)
L=Logic Low Level (Steady State)
X=Irrelevant (Any Input)
Z=Off State (TRI-STATE,High Impedance)
†
OPEN=Non-Terminated
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