DS36277TM National Semiconductor, DS36277TM Datasheet

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DS36277TM

Manufacturer Part Number
DS36277TM
Description
Manufacturer
National Semiconductor
Datasheet

Specifications of DS36277TM

Data Rate
1000Kbps
Interface Circuit Standard 1
RS-485
Number Of Receivers
1
Number Of Transmitters
1
Number Of Transceivers
1
Data Transmission Topology
Multidrop/Multipoint
Receiver Signal Type
Differential
Transmitter Signal Type
Differential
Single Supply Voltage (typ)
5V
Single Supply Voltage (min)
4.75V
Single Supply Voltage (max)
5.25V
Dual Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Supply Current
75mA
Power Supply Requirement
Single
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
8
Package Type
SOIC N
Lead Free Status / Rohs Status
Not Compliant

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© 2008 National Semiconductor Corporation
DS36277
Dominant Mode Multipoint Transceiver
General Description
The DS36277 Dominant Mode Multipoint Transceiver is de-
signed for use on bi-directional differential busses. It is opti-
mal for use on Interfaces that utilize Society of Automotive
Engineers (SAE) J1708 Electrical Standard.
The device is similar to standard TIA/EIA-485 transceivers,
but differs in enabling scheme. The Driver's Input is normally
externally tied LOW, thus providing only two states: Active
(LOW), or Disabled (OFF). When the driver is active, the
dominant mode is LOW, conversely, when the driver is dis-
abled, the bus is pulled HIGH by external bias resistors.
The receiver provides a FAILSAFE feature that guarantees a
known output state when the Interface is in the following con-
ditions: Floating Line, Idle Line (no active drivers), and Line
Fault Conditions (open or short). The receiver output is HIGH
for the following conditions: Open Inputs, Terminated Inputs
(50Ω), or Shorted Inputs. FAILSAFE is a highly desirable fea-
ture when the transceivers are used with Asynchronous Con-
trollers such as UARTs.
Connection and Logic Diagram
TRI-STATE
®
Order Number DS36277TM or DS36277TN
is a registered trademark of National Semiconductor Corporation.
See NS Package Number M08A or N08E
11384
1138401
Features
Truth Table
FAILSAFE receiver, RO = HIGH for:
— OPEN inputs
— Terminated inputs
— SHORTED inputs
Optimal for use in SAE J1708 Interfaces
Compatible with popular interface standards:
— TIA/EIA-485 and TIA/EIA-422-A
— CCITT recommendation V.11
Bi-directional transceiver
— Designed for multipoint transmission
Wide bus common mode range
— (−7V to +12V)
Available in plastic DIP and SOIC packages
DE
RE
H
L
L
H
L
L
L
L
Inputs
Inputs
DI
H
X
L
DO/RI–DO /RI
SHORTED
−500 mV
OPEN
Receiver
0 mV
Driver
X
DO/RI
H
Z
L
Outputs
August 12, 2008
www.national.com
Output
DO /RI
RO
H
H
H
Z
L
H
L
Z

Related parts for DS36277TM

DS36277TM Summary of contents

Page 1

... Shorted Inputs. FAILSAFE is a highly desirable fea- ture when the transceivers are used with Asynchronous Con- trollers such as UARTs. Connection and Logic Diagram Order Number DS36277TM or DS36277TN See NS Package Number M08A or N08E TRI-STATE ® registered trademark of National Semiconductor Corporation. ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Input Voltage ( and DI) Driver Output Voltage/ Receiver Input Voltage Receiver Output Voltage (RO) Maximum Package Power Dissipation @ +25°C N Package (derate 9.3 mW/°C above +25°C) M Package (derate 5.8 mW/° ...

Page 3

Symbol Parameter DEVICE CHARACTERISTICS V High Level Input Voltage IH V Low Level Input Voltage IL I High Level Input Current IH I Low Level Input Current IL V Input Clamp Voltage CL I Output Low Voltage CC I Supply ...

Page 4

Parameter Measurement Information FIGURE 4. Driver Differential Propagation Delay and Transition Time Test Circuit www.national.com FIGURE 1. Driver V and V Test Circuit T1 OS FIGURE 2. Driver V and V Test Circuit OH OL FIGURE 3. Driver Short Circuit ...

Page 5

FIGURE 5. Driver Differential Propagation Delays and Transition Times FIGURE 6. Driver Propagation Delay Test Circuit FIGURE 7. Driver Propagation Delays 5 1138406 1138407 1138408 www.national.com ...

Page 6

for for for for www.national.com FIGURE 8. Driver TRl-STATE Test Circuit (t FIGURE 9. Driver TRI-STATE ...

Page 7

FIGURE 12. Receiver V and V OH FIGURE 13. Receiver Propagation Delay Test Circuit FIGURE 14. Receiver Propagation Delays FIGURE 15. Receiver TRI-STATE Delay Test Circuit 7 1138413 OL 1138414 1138415 1138416 www.national.com ...

Page 8

S1 1.5V S2 OPEN S3 CLOSED S1 1.5V S2 CLOSED S3 CLOSED S1 −1.5V S2 CLOSED S3 OPEN S1 −1.5V S2 CLOSED S3 CLOSED Note 8: The input pulse is supplied by a generator having the following characteristics ...

Page 9

Typical Performance Characteristics Differential Output Voltage vs Output Current Driver Driver 1138422 Driver V CC 1138424 Driver V CC 1138426 9 Differential Output Voltage vs Output ...

Page 10

Receiver Receiver Supply Current vs Supply Voltage www.national.com 1138428 1138430 1138432 10 Receiver Temperature OH OH Receiver ...

Page 11

Typical Applications Information SAE J1708 Node with External Bias Resistors and Filters Voltage Output vs Voltage Input (Hysteresis) 11 1138434 1138421 www.national.com ...

Page 12

... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 8-Lead Molded Package (SO) Order Number DS36277TM NS Package Number M08A 8-Lead Molded Dual-In-Line Package (N) Order Number DS36277TN NS Package Number N08E 12 ...

Page 13

Notes 13 www.national.com ...

Page 14

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

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