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National Semiconductor Electronic Components Datasheet

DS16F95 Datasheet

EIA-485/EIA-422A Differential Bus Transceiver

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DS16F95 pdf
June 1998
DS16F95, DS36F95
EIA-485/EIA-422A Differential Bus Transceiver
General Description
The DS16F95/DS36F95 Differential Bus Transceiver is a
monolithic integrated circuit designed for bidirectional data
communication on balanced multipoint bus transmission
lines. The transceiver meets both EIA-485 and EIA-422A
standards.
The DS16F95/DS36F95 offers improved performance due to
the use of L-FAST bipolar technology. The L-FAST technol-
ogy allows for higher speeds and lower currents by minimiz-
ing gate delay times. Thus, the DS16F95 and DS36F95 con-
sume less power, and feature an extended temperature
range as well as improved specifications.
The DS16F95/DS36F95 combines a TRI-STATE® differen-
tial line driver and a differential input line receiver, both of
which operate from a single 5.0V power supply. The driver
and receiver have an active Enable that can be externally
connected to function as a direction control. The driver differ-
ential outputs and the receiver differential inputs are inter-
nally connected to form differential input/output (I/O) bus
ports that are designed to offer minimum loading to the bus
whenever the driver is disabled or when VCC = 0V. These
ports feature wide positive and negative common mode volt-
age ranges, making the device suitable for multipoint appli-
cations in noisy environments.
The driver is designed to accommodate loads of up to 60 mA
of sink or source current and features positive and negative
current limiting in addition to thermal shutdown for protection
from line fault conditions.
The DS16F95/DS36F95 can be used in transmission line
applications employing the DS96F172 and the DS96F174
quad differential line drivers and the DS96F173 and
DS96F175 quad differential line receivers.
Features
n Meets EIA-485 and EIA-422A
n Meets SCSI-1 (5 MHZ) specifications
n Designed for multipoint transmission
n Wide positive and negative input/output bus voltage
ranges
n Thermal shutdown protection
n Driver positive and negative current-limiting
n High impedance receiver input
n Receiver input hysteresis of 50 mV typical
n Operates from single 5.0V supply
n Reduced power consumption
n Pin compatible with DS3695 and SN75176A
n Military temperature range available
n Qualified for MIL-STD 883C
n Standard Military Drawings (SMD) available
n Available in DIP (J), SOIC (M), LCC (E), and Flatpak
(W) packages
Logic Diagram
Function Tables
Driver
Driver Input
DI
H
L
X
Enable
DE
H
H
L
Outputs
AB
HL
LH
ZZ
DS009629-20
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS009629
Receiver
Differential Inputs
A–B
VID 0.2V
VID −0.2V
X
H = High Level
L = Low Level
X = Immaterial
Z = High Impedance (Off)
Enable
RE
L
L
H
Output
RO
H
L
Z
www.national.com


National Semiconductor Electronic Components Datasheet

DS16F95 Datasheet

EIA-485/EIA-422A Differential Bus Transceiver

No Preview Available !

DS16F95 pdf
COMMERCIAL
Absolute Maximum Ratings (Note 2)
Specifications for the 883 version of this product are
listed separately on the following pages.
Storage Temperature Range
−65˚C to +175˚C
Lead Temperature
(Soldering, 60 sec.)
300˚C
Maximum Package Power Dissipation (Note 1) at 25˚C
’J’ Package
1300 mW
’M’ Package
735 mW
Supply Voltage
7.0V
Input Voltage (Bus Terminal)
+15V/−10V
Enable Input Voltage
5.5V
Recommended Operating
Conditions
Min
Supply Voltage (VCC)
DS36F95
4.75
DS16F95
4.50
Voltage at Any Bus Terminal
(Separately or Common Mode)
(VI or VCM)
Differential Input
−7.0
Voltage (VID)
Output Current HIGH (IOH)
Driver
Typ
5.0
5.0
Receiver
Output Current LOW (IOL)
Driver
Receiver
Operating Temperature (TA)
DS36F95
0 +25
DS16F95
−55 +25
Note 1: Derate ’J’ package 8.7 mW/˚C above 25˚C.
Derate ’M’ package 5.88 mW/˚C above 25˚C.
Driver Electrical Characteristics (Notes 3, 4)
Over recommended supply voltage and operating temperature ranges, unless otherwise specified
Max
5.25
5.50
+12
±12
−60
−400
60
16
+70
+125
Symbol
VIH
VIL
VOH
VOL
VIC
|VOD1|
|VOD2|
Parameter
Input Voltage HIGH
Input Voltage LOW
Output Voltage HIGH
Output Voltage LOW
Input Clamp Voltage
Differential Output Voltage
Differential Output Voltage
|VOD|
VOC
|VOC|
IO
IIH
IIL
IOS
Change in Magnitude of
Differential Output Voltage
(Note 5)
Common Mode Output
Voltage (Note 6)
Change in Magnitude of
Common Mode Output
Voltage (Note 5)
Output Current (Note 9)
(Includes Receiver II)
Input Current HIGH
Input Current LOW
Short Circuit Output Current
(Note 10)
Conditions
IOH = −55 mA
IOL = 55 mA
II = −18 mA
IO = 0 mA
RL = 100, Figure 1
RL = 54, Figure 1
RL = 54or 100,
Figure 1
0˚C to +70˚C
0˚C to +70˚C
−40˚C to +125˚C
−55˚C to +125˚C
Output Disabled
VI = 2.4V
VI = 0.4V
VO = −7.0V
VO = 0V
VO = VCC
VO = +12V
VO = +12V
VO = −7.0V
Min Typ Max
2.0
0.8
3.0
2.0
−1.3
6.0
2.0 2.25
1.5 2.0
±0.2
±0.4
3.0
±0.2
1.0
−0.8
20
−50
−250
−150
150
250
Units
V
V
V
V
mA
µA
mA
mA
˚C
˚C
Units
V
V
V
V
V
V
V
V
V
V
mA
µA
µA
mA
www.national.com
2


Part Number DS16F95
Description EIA-485/EIA-422A Differential Bus Transceiver
Maker National
Total Page 14 Pages
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