ULTRA HIGH SPEED RS-485/RS-422 PROFIBUS TRANSCEIVERS WITH 1/8TH UNIT LOAD
AND +/-15KV ESD-PROTECTION
AUGUST 2011
REV. 1.0.2
XR5486E-5488E
GENERAL DESCRIPTION
The
XR5486E-XR5488E
family of RS-485 devices
are designed for reliable, bidirectional communication
on multipoint bus transmission lines. Each device
contains one differential driver and one differential
receiver. XR5488E is a half-duplex device while the
other part numbers are full-duplex. All devices comply
with TIA/EIA-485 and TIA/EIA-422 standards. Lead-
free and RoHS compliant packages are available for
all models.
These devices are ruggedized for use in harsh
operating conditions over the entire common mode
voltage range from -7V to +12V. Receivers are
specially designed to fail-safe to a logic high output
state if the inputs are left un-driven or shorted. All RS-
485 bus-pins are protected against severe ESD
events up to +/-15kV Air-Gap (IEC-61000-4-2), up to
+/-8kV Contact Discharge (IEC-61000-4-2) and up to
+/-15kV Human body Model. Drivers are protected
from excess current flow caused by bus contention or
output short-circuits by both an internal current limit
and a thermal-overload shutdown. Devices are rated
for Industrial (-40°C to +85°C) operating
temperatures. Receivers have exceptionally high
input impedance, which places only 1/8th the
standard load on a bus. Up to 256 transceivers may
coexist while preserving full signal margin.
All devices operate from a single 5.0V power supply
and draw negligible quiescent power. All versions
except the XR5487E may independently enable and
disable their driver and receiver and enter a low
power shutdown mode if both driver and receiver are
disabled. All outputs maintain high impedance in
shutdown or when powered-off.
FEATURES
•
5.0V Single Supply Operation
•
High Speed up to 52Mbps
•
Advanced Fail-safe Receiver Inputs
•
Hot Swap glitch protection on control inputs
•
Robust ESD Protection for RS-485 pins
■
■
■
+/-15kV Air-Gap Discharge
+/-15kV Human Body Model
+/-8kV Contact Discharge
•
1/8th Unit Load, 256 transceivers on bus
•
Driver short circuit current limit and thermal
shutdown for overload protection
•
Low Current 1
μ
A shutdown mode (except
XR5487E)
•
Industry standard package footprints
TYPICAL APPLICATIONS
•
Motor Control
•
Building Automation
•
Security Systems
•
Remote Utility Meter Reading
F
IGURE
1. T
YPICAL
A
PPLICATION
C
IRCUIT
DE
XR5488E
DI
DE
XR5488E
B
R
T
B
STUB
R
T
DI
A
RO
B
XR5488E
A
XR5488E
B
A
A
RO
RE
DE
RE
RE DE
DI
RO
DI
RO
RE
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
•
(510) 668-7000
•
FAX (510) 668-7017
•
www.exar.com
XR5486E-5488E
ULTRA HIGH SPEED RS-485/RS-422 PROFIBUS TRANSCEIVERS WITH 1/8TH UNIT LOAD AND +/-15KV ESD-PROTECTION
REV. 1.0.2
F
IGURE
2. P
IN
O
UT
A
SSIGNMENT
RO
RE
DE
DI
1
2
3
4
8-Pin NSOIC
Half Duplex
XR5488E
8 VCC
7 B
6 A
5 GND
VCC
RO
DI
GND
1
2
3
4
8-Pin NSOIC
Full Duplex
XR5487E
8
7
6
5
A
B
Z
Y
NC
RO
RE
DE
DI
GND
GND
1
2
3
4
5
6
7
14-Pin NSOIC
Full Duplex
XR5486E
14 VCC
13 NC
12 A
11 B
10 Z
9
Y
8 NC
ORDERING INFORMATION
P
ART
N
UMBER
XR5486EID-F
XR5487EID-F
XR5488EID-F
P
ACKAGE
14-pin Narrow SOIC
8-pin Narrow SOIC
8-pin Narrow SOIC
O
PERATING
T
EMPERATURE
R
ANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
D
EVICE
S
TATUS
Active
Active
Active
Note: To order Tape and Reel option include "/TR" in ordering part number. All packages are Pb-free/ RoHS compliant.
2
XR5486E-5488E
REV. 1.0.2
ULTRA HIGH SPEED RS-485/RS-422 PROFIBUS TRANSCEIVERS WITH 1/8TH UNIT LOAD AND +/-15KV ESD-PROTECTION
PIN DESCRIPTIONS
Pin Assignments
P
IN
N
UMBER
H
ALF
D
UPLEX
XR5488E
1
F
ULL
D
UPLEX
XR5487E
2
XR5486E
2
RO
O
Receiver Output. When RE is low and if (A-
B)
≥
-50mV, RO is High. If (A-B)
≤
-200mV,
RO is Low.
Receiver Output Enable. When RE is Low,
RO is enabled. When RE is High, RO is
high impedance. RE should be High and DE
should be low to enter shutdown mode. RE
is a hot-swap input.
Driver Output Enable. When DE is High,
outputs are enabled. When DE is low, out-
puts are high impedance. DE should be low
and RE should be High to enter shutdown
mode. DE is a hot-swap input.
Driver Input. With DE high, a low level on DI
forces Non-Inverting output low and invert-
ing output high. Similarly, a high level on DI
forces Non-Inverting output High and Invert-
ing output Low.
Ground.
Non-Inverting Receiver Input and Non-
Inverting Driver Output.
Inverting Receiver Input and Inverting
Driver Output.
+5.0V power supply input. Bypass with
0.1uF capacitor.
Non-Inverting Receiver Input.
Inverting Receiver Input.
Non-Inverting Driver Output.
Inverting Driver Output.
No Connect, not internally connected.
P
IN
N
AME
T
YPE
D
ESCRIPTION
2
-
3
RE
I
3
-
4
DE
I
4
3
5
DI
I
5
6
7
8
-
-
-
-
-
4
-
-
1
8
7
5
6
-
6, 7
-
-
14
12
11
9
10
1, 8, 13
GND
A
B
Vcc
A
B
Y
Z
NC
Pwr
O
O
Pwr
I
I
O
O
-
Pin type: I=Input, O=Output.
3
XR5486E-5488E
ULTRA HIGH SPEED RS-485/RS-422 PROFIBUS TRANSCEIVERS WITH 1/8TH UNIT LOAD AND +/-15KV ESD-PROTECTION
REV. 1.0.2
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections to the
specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability and cause permanent
damage to the device.
V
CC
Input voltage at control pins (RE, DE)
Driver input voltage (DI)
Receiver output voltage (RO)
Driver output voltage (A, B, Y and Z)
Receiver input voltage (A, B)
Voltage input range, transient pulse, A, B, Y and Z,
through 100Ω, see Figure 19.
Storage temperature range
Lead temperature
Power Dissipation
Maximum Junction Temperature 150°C
8-Pin SO
θ
JA
= 128.4°C/W
14-Pin SO
θ
JA
= 86°C/W
Vcc
≤
+7.0V
-0.3V to (V
CC
+ 0.3V)
-0.3V to (V
CC
+ 0.3V)
-0.3V to (V
CC
+ 0.3V)
-8V to +13V
-8V to +13V
+/-65.0V
-65°C to + 150°C
+300°C
CAUTION:
ESD (Electrostatic Discharge) sensitive device. Permanent damage may occur on unconnected devices subject to high energy electrostatic fields. Unused
devices must be stored in conductive foam or shunts. Personnel should be properly grounded prior to handling this device. The protective foam should be
discharged to the destination socket before devices are removed.
ELECTRICAL CHARACTERISTICS
U
NLESS OTHERWISE NOTED
: V
CC
= +5.0V +/-0.25V
WITH
T
A FROM
-40
O
C
TO
+85
O
C. T
YPICAL VALUES ARE AT
V
CC
= +5.0V
AND
25
O
C.
S
YMBOL
P
ARAMETERS
M
IN
T
YP
M
AX
U
NITS
C
ONDITIONS
DRIVER DC CHARACTERISTICS
Vcc
2.8
V
OD
Differential Driver Output
2.4
2.4
2.4
-0.20
-0.20
-0.20
-0.20
0.20
0.20
V
0.20
0.20
V
No Load
R
L
= 100Ω (RS-422), Figure 3
R
L
= 54Ω (RS-485), Figure 3
V
CM
= -7V, Figure 4
V
CM
= +12V, Figure 4
R
L
= 100Ω (RS-422), Figure 3,
See note 1
R
L
= 54Ω (RS-485), Figure 3, See
note 1
V
CM
= -7V, Figure 4, See
note 1
V
CM
= +12V, Figure 4, See note 1
ΔV
OD
Change in Magnitude of Differential
Output
4
XR5486E-5488E
REV. 1.0.2
ULTRA HIGH SPEED RS-485/RS-422 PROFIBUS TRANSCEIVERS WITH 1/8TH UNIT LOAD AND +/-15KV ESD-PROTECTION
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