RS-485 Transceiver. TP485E Datasheet

TP485E Transceiver. Datasheet pdf. Equivalent

TP485E Datasheet
Recommendation TP485E Datasheet
Part TP485E
Description Bus-Polarity Correcting RS-485 Transceiver
Feature TP485E;     Features TP485E ±18K ESD Protection, Bus-Polarity Correcting RS-485 Transceiver Description  .
Manufacture 3PEAK
Datasheet
Download TP485E Datasheet




3PEAK TP485E
 
 
Features
TP485E
±18K ESD Protection, Bus-Polarity Correcting RS-485 Transceiver
Description
Exceeds Requirements of EIA-485 Standard
Bus-Polarity Correction within 100 ms (tFS)
Data Rate: 300 bps to 250 kbps
Works with Two Configurations:
– Failsafe Resistors Only
– Failsafe and Differential Termination Resistors
Up to 256 Nodes on a Bus (1/8 unit load)
Wide Supply Voltage 3V to 5.5V
SOIC-8 Package for Backward Compatibility
Bus-Pin Protection:
– ±18 kV HBM protection
– ±13 kV IEC61000-4-2 Contact Discharge
– +4 kV IEC61000-4-4 Fast Transient Burst
Applications
E-Metering Networks
Industrial Automation
HVAC Systems
Process Control
DMX512-Networks
Battery-Powered Applications
Pin Configuration (Top View)
The TP485E is a low-power RS-485 transceiver with
automatic bus-polarity correction and transient
protection. Upon hot plug-in, the device detects and
corrects the bus polarity within the first 100 ms of bus
idling. On-chip transient protection protects the device
against IEC61000 ESD and EFT transients. This device
has robust drivers and receivers for demanding
industrial applications. The bus pins are robust to
electrostatic discharge (ESD) events, with high levels of
protection to Human-Body Model (HBM), Air-Gap
Discharge, and Contact Discharge specifications. The
device combines a differential driver and a differential
receiver, which operate together from a single 5-V power
supply. The driver differential outputs and the receiver
differential inputs are connected internally to form a bus
port suitable for half-duplex(two-wire bus) communication.
The device features a wide common-mode voltage range
making the device suitable for multi-point applications
over long cable runs. The TP485E is available in both
SOIC-8 and MSOP-8 package, and is characterized from
–40°C to 125°C.
3PEAK and the 3PEAK logo are registered trademarks of
3PEAK INCORPORATED. All other trademarks are the property of
their respective owners.
TP485E
8-Pin SOIC/MSOP
-S and -V Suffixes
R VCC
RE B/Z
DE A/Y
D GND
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Rev.A
1 



3PEAK TP485E
TP485E 
 
±18K ESD Protection, Bus-Polarity Correcting RS-485 Transceiver
Order Information
Model Name
TP485E
TP485E
Order Number
TP485E-SR
TP485E-VR
Package
8-Pin SOIC
8-Pin MSOP
Transport Media, Quantity
Tape and Reel, 4,000
Tape and Reel, 3,000
Marking
Information
TP485E
TP485E
 
INPUT ENABLE
D DE
OUTPUTS
AB
DRIVER PIN FUNCTIONS
 
DESCRIPTION
NORMAL MODE
H H H L Actively drives bus High
L H L H Actively drives bus Low
X L Z Z Driver disabled
X OPEN Z
Z Driver disabled by default
OPEN
H
H
L Actively drives bus High
POLARITY-CORRECTING MODE(1)
H H L H Actively drives bus Low
L H H L Actively drives bus High
X L Z Z Driver disabled
X OPEN Z
Z Driver disabled by default
OPEN
H
L
H Actively drives bus Low
 
(1)
The polarity-correcting mode is entered when VID < VIT– and t > tFS and DE = low. This state is latched when /RE turns from Low to
High.
 
RECEIVER PIN FUNCTIONS
 
DIFFERENTIAL  
 
INPUT
ENABLE
OUTPUT
DESCRIPTION
VID = VA – VB
/RE
R
NORMAL MODE
VIT+ < VID
VIT– < VID < VIT+
VID < VIT–
X
L
L
L
H
H Receive valid bus High
? Indeterminate bus state
L Receive valid bus Low
Z Receiver disabled
X
OPEN
Z Receiver disabled
Open, short, idle Bus
L
? Indeterminate bus state
POLARITY-CORRECTING MODE(1)
VIT+ < VID
VIT– < VID < VIT+
VID < VIT–
X
L
L
L
H
L Receive valid bus Low
? Indeterminate bus state
H Receive polarity corrected bus High
Z Receiver disabled
X
OPEN
Z Receiver disabled
Open, short, idle Bus
L
? Indeterminate bus state
 
(1)
The polarity-correcting mode is entered when VID < VIT– and t > tFS and DE = low. This state is latched when /RE turns from Low to
High.
2  Rev.A
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3PEAK TP485E
        
TP485E
±18K ESD Protection, Bus-Polarity Correcting RS-485 Transceiver
Absolute Maximum Ratings
VDD to GND.........................................................................................................................................-0.3V to +7V
Input Voltages
DI, DE, RE………………………………………………………………………….……………………….....-0.3V to (VCC + 0.3V)
Input/Output Voltages
A/Y, B/Z, A, B, Y, Z………………………………………………………………………..……….…….…...-15V to +15V
A/Y, B/Z, A, B, Y, Z (Transient Pulse Through 100,
Note 1)………………………………………………………………………………………….……….….… ±100V
RO……………………………………………………………………………………………………….……. -0.3V to (VCC +0.3V)
Short Circuit Duration
Y, Z…………………………………………………………………………………………………………..….Continuous
ESD Rating………………………………………………………………………………………………..……See Specification Table
Recommended Operating Conditions Note 2
Supply Voltage………………………………………………………………………………….………..…….3V to 5.5V
Temperature Range……………………………………………………………………………………...……-40°C to +125°C
Bus Pin Common Mode Voltage Range ……………………………………………………………..……..-8V to +13V
Thermal Resistance, ΘJA (Typical)
8-Pin SOIC Package ……………………………………………………………….…………………...……158°C/W
8-Pin MSOP Package ……………………………………………………………….……………………..…210°C/W
Maximum Junction Temperature (Plastic Package) …………………………………………...………….+150°C
Maximum Storage Temperature Range ………………………………………………………..…………. -65°C to +150°C
Note 1: Tested according to TIA/EIA-485-A, Section 4.2.6 (±100V for 15μs at a 1% duty cycle).
Note 2: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact
product reliability and result in failures not covered by warranty.
www.3peakic.com
Rev.A
3 







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