TPT7487/TPT7488
Isolated Full- and Half-Duplex RS485 Transceiver
Features
Applications
•
•
Exceeds Requirements of EIA-485 Standard
•
•
•
•
•
Supply Voltage: 3.0 V ~ 5.5 V
•
•
•
•
•
•
Latch-up Performance Exceeds 600 mA
Hot Plug Circuitry - Tx and Rx Outputs Remain ThreeState During Power-up/Power-down
Data Rate: 500-kbps Isolated RS485
•
Up to 5-kV RMS Isolation Rating
±15-kV IEC 61000-4-2 Contact Discharge
±20-kV IEC 61000-4-2 Air Discharge
Safety-Related Certifications:
–
–
–
5000-VRMSIsolation Rating per UL 1577
Communication Infrastructure
The TPT748x features a fail-safe receiver, which supports
the output of the receiver to be logic high when the
differential input (bus pin A/B) of the receiver is open,
short, or idle.
Bus-Pin Protection (Between Bus pins and GNDB)
VDE Certification according to DIN VDE V
0884-17(IEC60747-17)
Industrial Control
The TPT7487 is a ±15-kV IEC61000 ESD protected, 3.0-V
~ 5.5-V isolated RS485 transceivers that meet the RS-485
and RS-422 standards for Half Duplex communication.
The TPT7488 is isolated Full Duplex RS485.
±200-kV/μs typ Static CMTI, ±150-kV/μs typ Dynamic
CMTI
–
Motor Drives
Description
Full Fail-safe Receiver (Open, Short, Terminated)
–
–
Home Appliance
Transmitters in this family deliver exceptional differential
output voltages into the RS-485 required 54-Ω load. The
500-kbps device has very low bus currents, so they
present a true “1/8 unit load” to the RS-485 bus. This
allows up to 256 transceivers on the network without using
repeaters. Receiver (Rx) inputs feature a “Full Fail-Safe”
design, which ensures a logic-high Rx output if Rx inputs
are floating, shorted, or on a terminated but undriven bus.
CQC Certification per GB 4943.1
CSA, TUV, and CB Certifications
The TPT748x is available in the WSOP16 package and is
characterized from −40°C to +125°C.
Functional Block Diagram
VCCA
VCCB
VCCA
RE
VCCB
RE
A
A
R
R
R
R
B
Isolation
Capacitor
B
Isolation
Capacitor
Isolation
Capacitor
Isolation
Capacitor
Z
D
D
D
D
Y
Isolation
Capacitor
Isolation
Capacitor
Isolation
Capacitor
DE
Isolation
Capacitor
DE
GNDA
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GNDB
GNDA
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GNDB
CA202301115A1
TPT7487/TPT7488
Isolated Full- and Half-Duplex RS485 Transceiver
Table of Contents
Features................................................................................................................................................................1
Applications......................................................................................................................................................... 1
Description........................................................................................................................................................... 1
Functional Block Diagram...................................................................................................................................1
Revision History...................................................................................................................................................3
Pin Configuration and Functions....................................................................................................................... 4
Specifications.......................................................................................................................................................6
Absolute Maximum Ratings (1) .......................................................................................................................6
ESD, Electrostatic Discharge Protection........................................................................................................ 6
Recommended Operating Conditions............................................................................................................ 6
Thermal Information........................................................................................................................................7
Insulation Specifications................................................................................................................................. 7
Safety-Related Certifications.......................................................................................................................... 9
Electrical Characteristics.............................................................................................................................. 10
Electrical Characteristics （continued）.......................................................................................................11
Switching Characteristics..............................................................................................................................12
Test Circuits and Waveforms........................................................................................................................ 13
Detailed Description.......................................................................................................................................... 15
Overview.......................................................................................................................................................15
Functional Block Diagram.............................................................................................................................15
Feature Description...................................................................................................................................... 16
Tape and Reel Information................................................................................................................................ 17
Package Outline Dimensions........................................................................................................................... 18
WSOP16.......................................................................................................................................................18
Order Information.............................................................................................................................................. 19
IMPORTANT NOTICE AND DISCLAIMER......................................................................................................... 20
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CA202301115A1
TPT7487/TPT7488
Isolated Full- and Half-Duplex RS485 Transceiver
Revision History
Date
Revision
2022-03-10
Rev.Pre.0
2022-09-08
Rev.A.0
Released Version
2023-11-15
Rev.A.1
Updated new format and EC table
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Notes
Initial Version
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CA202301115A1
TPT7487/TPT7488
Isolated Full- and Half-Duplex RS485 Transceiver
Pin Configuration and Functions
TPT7487
WSOP16
Top View
VCCA
1
16
VCCB
GNDA
2
15
GNDB
R
3
14
NC
/RE
4
13
B
DE
5
12
A
D
6
11
NC
NC
7
10
NC
GNDA
8
9
GNDB
Table 1. Pin Functions: TPT7487
Pin No.
Name
I/O
1
VCCA
−
Logic-side power supply
2
GNDA
−
Ground connection for VCCA
3
R
O
Receiver output
4
/RE
I
Receiver enable. This pin disables the receiver output when
high or open and enables the receiver output when low.
5
DE
I
Driver enable. This pin enables the driver output when high and
disables the driver output when low or open.
6
D
I
Driver input
7
NC
−
Not Connected
8
GNDA
−
Ground connection for VCCA
9
GNDB
−
Ground connection for VCCB
10
NC
−
Not Connected
11
NC
−
Not Connected
12
A
I/O
Transceiver non-inverting input or output (I/O) on the bus side
13
B
I/O
Transceiver inverting input or output (I/O) on the bus side
14
NC
−
Not Connected
15
GNDB
−
Ground connection for VCCB
16
VCCB
−
Transceiver-side power supply
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Description
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CA202301115A1
TPT7487/TPT7488
Isolated Full- and Half-Duplex RS485 Transceiver
TPT7488
WSOP16
Top View
VCCA
1
16
VCCB
GNDA
2
15
GNDB
R
3
14
A
/RE
4
13
B
DE
5
12
Z
D
6
11
Y
NC
7
10
NC
GNDA
8
9
GNDB
Table 2. Pin Functions: TPT7488
Pin No.
Name
I/O
1
VCCA
—
Logic-side power supply
2
GNDA
—
Ground connection for VCCA
3
R
O
Receiver output
4
/RE
I
Receiver enable. This pin disables the receiver output when
high or open and enables the receiver output when low.
5
DE
I
Driver enable. This pin enables the driver output when high and
disables the driver output when low or open.
6
D
I
Driver input
7
NC
—
Not Connected
8
GNDA
—
Ground connection for VCCA
9
GNDB
—
Ground connection for VCCB
10
NC
—
Not Connected
11
Y
O
Driver non-inverting output
12
Z
O
Driver inverting output
13
B
I
Receiver inverting input on the bus side
14
A
I
Receiver non-inverting input on the bus side
15
GNDB
—
Ground connection for VCCB
16
VCCB
—
Transceiver-side power supply
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Description
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CA202301115A1
TPT7487/TPT7488
Isolated Full- and Half-Duplex RS485 Transceiver
Specifications
Absolute Maximum Ratings (1)
Parameter
Min
Max
Unit
VCC
Supply Voltage, VCCA, VCCB
−0.5
6
V
VIO
Voltage at Logic Pin: D, DE, /RE, R
−0.5
6
V
VBUS
Voltage at Bus Pin: A, B
−15
15
V
TA
Operating Temperature Range
−40
125
°C
TJ
Maximum Junction Temperature
−40
150
°C
TS
Storage Temperature Range
−65
150
°C
TLead
Lead Temperature (Soldering, 10 sec)
-
260
°C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure
to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.
(2) This data was taken with the JEDEC low effective thermal conductivity test board.
(3) This data was taken with the JEDEC standard multilayer test boards.
ESD, Electrostatic Discharge Protection
Parameter
Condition
Value
Unit
IEC-61000-4-2, Contact Discharge
Bus pin to
GNDB
±15
kV
IEC-61000-4-2, Air-Gap Discharge
Bus pin to
GNDB
±20
kV
Bus pin to
GNDB
±18
kV
All Pins except
bus pin
±7
kV
IEC
HBM
HBM, per ANSI/ESDA/JEDEC JS-001
(1)
CDM
CDM, per ANSI/ESDA/JEDEC JS-002 (2)
All pins
±1.5
kV
LU
Latch up, per JESD78
All pins
±600
mA
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
Recommended Operating Conditions
Parameter
Min
Max
Unit
VCC
Supply Voltage
3.0
5.5
V
VI
Input Voltage at any Bus Terminal
−7
12
V
VIH
High-level Input Voltage (driver, driver enable, and receiver enable inputs)
2
VCC
V
VIL
Low-level Input Voltage (driver, driver enable, and receiver enable inputs)
0
0.8
V
VID
Differential Input Voltage
−7
12
V
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CA202301115A1
TPT7487/TPT7488
Isolated Full- and Half-Duplex RS485 Transceiver
Parameter
RL
Differential Load Resistance
Min
Max
Unit
54
-
Ω
Thermal Information
Package Type
θJA
θJC
Unit
WSOP16
75
41
°C/W
Insulation Specifications
Parameter
CLR
External clearance
CPG
External creepage
DTI
DTC
CTI
Conditions
WSOP16
Unit
> 8.0
mm
> 8.0
mm
> 22
μm
0.8
mm
> 600
V
I
-
For Rated Mains Voltage ≤ 150 VRMS
I-IV
-
For Rated Mains Voltage ≤ 300 VRMS
I-IV
-
For Rated Mains Voltage ≤ 600 VRMS
I-IV
-
For Rated Mains Voltage ≤ 1000 VRMS
I-III
-
Climatic category
40/125/21
-
Pollution degree
2
-
AC voltage
1414
VPK
Distance through the
insulation
Shortest terminal-to-terminal distance through air
Value
Shortest terminal-to-terminal distance across the
package surface
Minimum internal gap (internal clearance)
Distance through the
Minimum internal distance across the conductors
Molding compound
inside the package
Comparative tracking
index
Material group
Over-voltage category
DIN V VDE V 0884-17 (1)(2)
VIORM
Maximum repetitive
isolation voltage
VIOWM
Maximum working
isolation voltage
AC voltage; TDDB Test
1000
VRMS
DC voltage
1414
VDC
VIOTM
Maximum transient
isolation voltage
VTEST = VIOTM, t = 60 s (qualification);
VTEST = 1.2 x VIOTM, t = 1 s (100% production)
7070
VPK
VIOSM
Maximum surge isolation
voltage (3)
Test method per IEC 62368-1, 1.2/50 μs waveform,
VTEST = 1.3 × VIOSM (qualification)
6500
VPK
qpd
Apparent charge
Method a, After Input/Output safety test subgroup 2/3,
Vini = VIOTM, tini = 60 s; Vpd(m) = 1.2 × VIORM, tm = 10 s
≤5
pC
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CA202301115A1
TPT7487/TPT7488
Isolated Full- and Half-Duplex RS485 Transceiver
Parameter
CIO
Isolation capacitance
Conditions
Isolation resistance
WSOP16
Method a, After environmental tests subgroup 1, Vini =
VIOTM, tini = 60 s; Vpd(m) = 1.6 × VIORM, tm = 10 s
≤5
Method b1; At routine test (100% production) and
preconditioning (type test), Vini = 1.2 x VIOTM, tini = 1
s; Vpd(m) = 1.875 × VIORM, tm = 1 s
≤5
VIO = 0.4 × sin (2πft), f = 1 MHz
VIO = 500 V, T A= 25°C
RIO
Value
VIO = 500 V, 100°C ≤ T A≤ 125°C
VIO = 500 V at T S= 150°C
Unit
~ 0.5
pF
>
1012
Ω
>
1011
Ω
>
109
Ω
UL 1577
VISO
Withstanding isolation
VTEST= VISO, t = 60 s(qualification); VTEST= 1.2 × VISO, t
voltage
= 1 s (100% production)
5000
VRMS
(1) All pins on each side of the barrier are tied together creating a two-terminal device.
(2) This coupler is suitable for safe electrical insulation only within the safety operating ratings. Compliance with the safety
ratings shall be ensured by means of suitable protective circuits.
(3) Testing must be carried out in oil.
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CA202301115A1
TPT7487/TPT7488
Isolated Full- and Half-Duplex RS485 Transceiver
Safety-Related Certifications
VDE
UL
Certified according
Certified according to UL 1577 and
to DIN VDE V
CSA Component
0884-17
Acceptance Notice
5A
TUV
CQC
CSA
Certified according
to EN IEC 62368-1 Certified according
and EN IEC
to GB 4943.1
61010-1
Certified CSA
C22.2 No. 62368-1 Certified according
and CAN/CSAto EN IEC 62368-1
C22.2 No. 60601-1
400Vrms basic
insulation (SOP,
QSOP) and 600V
rms reinforced
insulation (WSOP)
working voltage
per CSA C22.2
No. 62368-1:19
3rd, IEC
62368-1:2018 Ed.
3(in pollution
degree 2, material
group I)
2 MOPP (Means of
Patient Protection)
insulation
requirements for
250Vrms (WSOP)
in CAN/CSA-C22.2
No. 60601-1:14,
IEC 60601-1:2005
+ AMD1:2012
Basic insulation
(WSOP) VIORM=
1414 VIOSM=
6500
(SOP, QSOP)
VIORM= 637
VIOSM= 5980
(WSOP)Single
protection,
5000Vrms
(SOP,
QSOP)Single
protection,
3750Vrms
6400Vrms
reinforced
insulation
(WSOP), 800Vrms
maximum work
voltage
4000Vrms basic
insulation (SOP,
QSOP), 400V rms
maximum work
voltage
Certificate No.
40054570
Report Reference
E524241
Customer
Certificate No.
Master contract:
Number：2332359 CQC22001356658 302375
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CB
Reinforced
insulation (WSOP),
Altitude
