SIPEX SP489ACP

PRELIMINARY INFORMATION
®
SP488A and SP489A
High Speed Quad
RS-485/RS-422 Line Receivers
■ High Speed Versions of Sipex's
SP488 & SP489
■ 30Mbps Transmission Rates
■ Quad Differential Line Receivers
■ RS-485 or RS-422 Applications
■ Tri–state Output Control
■ 30ns Typical Receiver Propagation
Delays
■ –7V to +12V Common Mode Input
Range
■ 1mA Supply Current
■ Single +5V Supply Operation
■ Pin Compatible with SN75173,
SN75175, LTC488 and LTC489
DESCRIPTION…
The SP488A and SP489A are high speed quad differential line receivers capable of
meeting the RS-485 and RS-422 protocols while running at five times the normal
transmission rates. The SP488A and SP489A are enhanced versions of Sipex's SP488
and SP489 quad RS-485/RS-422 line receivers. The SP488A features a common
receiver enable control; the SP489A provides independent receiver enable controls for each
pair of receivers. Both feature tri–state outputs and wide common–mode input range.
The receivers have a fail–safe feature which forces a logic “1” output when receiver inputs
are left floating. Both are available in 16–pin plastic DIP and SOIC packages.
16
VCC
15
RI4B
14
RI4A
4
13
RO4
RO2
5
12
EN3/EN4
RO3
RI2A
6
11
RO3
10
RI3A
RI2B
7
10
RI3A
9
RI3B
GND
8
9
RI3B
16
VCC
RI1B
1
15
RI4B
RI1A
2
14
RI4A
RO1
3
4
13
RO4
EN1/EN2
RO2
5
12
EN
RI2A
6
11
RI2B
7
GND
8
RI1B
1
RI1A
2
RO1
3
EN
SP488A
1
4
2
SP488A/489ADS/07
3
SP489A
1
4
2
SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers
1
3
© Copyright 2000 Sipex Corporation
PRELIMINARY INFORMATION
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device
at these or any other above those indicated in the operation
sections of the specifications below is not implied. Exposure to
absolute maximum rating conditions for extended periods of time
may affect reliability.
VCC ............................................................................................ +7V
Input Voltages
Logic ............................................................. –0.5V to (VCC +0.5V)
Receiver ............................................................................... ±14V
Receiver Output Voltage ................................. –0.5V to (VCC +0.5V)
Input Currents
Logic .................................................................................. ±25mA
Storage Temperature ............................................ –65°C to +150°C
Power Dissipation
Plastic DIP ........................................................................ 375mW
(derate 7mW/°C above +70°C)
Small Outline .................................................................... 375mW
(derate 7mW/°C above +70°C)
Lead Temperature (soldering, 10 sec) ................................... 300°C
SPECIFICATIONS
VCC = 5V±5%; typicals at 25°C; TMIN ≤ TA ≤ TMAX unless otherwise noted.
PARAMETER
DC CHARACTERISTICS
Digital Inputs
Voltage
VIL
VIH
Input Current
RECEIVER INPUTS
Input Resistance
Differential Input Threshold
Input Current (A, B)
MIN.
TYP.
MAX.
CONDITIONS
EN, EN, EN1/EN2, EN3/EN4
0.8
2.0
12
-0.2
±2
Volts
Volts
µA
+0.2
kOhm
Volts
+1.0
-0.8
Maximum Data Rate
30
RECEIVER OUTPUTS
Output Voltage
VOH
3.5
VOL
High Impedance Output Current
0.4
+1
POWER REQUIREMENTS
Supply Voltage
4.75
5.25
Supply Current
TBD
ENVIRONMENTAL AND MECHANICAL
Operating Temperature
–C
0
+70
–E
-40
+85
Storage Temperature
-65
+150
Package
–_P
16–pin Plastic DIP
–_T
16–pin SOIC
SP488A/489ADS/07
UNIT
mA
mA
Mbps
V
V
µA
–7V ≤ VCM ≤ 12V
–7V ≤ VCM ≤ 12V
VCC = 0V or 5.25V; IIN2
VIN = +12V
VIN = –7V
IO = –4mA; VID = +0.2V
IO = +4mA; VID = –0.2V
EN = O, EN = VCC, EN1/EN2 = O,
EN3/EN4 = O, 0.4V ≤ VO ≤ 2.4V
Volts
mA
No load
°C
°C
°C
SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers
2
0V ≤ VIN ≤ VCC
© Copyright 2000 Sipex Corporation
PRELIMINARY INFORMATION
AC PARAMETERS
VCC = 5V±5%; typicals at 25°C; 0°C ≤ TA ≤ +70°C unless otherwise noted.
PARAMETER
MIN.
PROPAGATION DELAY
Receiver Input to Output
Low to HIGH (tPLH)
High to LOW (tPHL)
Differential Receiver Skew (tSKD)
Receiver Rise Time (tR)
SP488A
SP489A
Receiver Fall Time (tF)
SP488A
SP489A
RECEIVER ENABLE
To Output HIGH
TYP.
MAX.
UNIT
TBD
TBD
TBD
ns
ns
ns
TBD
TBD
ns
ns
TBD
TBD
ns
ns
TBD
ns
To Output LOW
TBD
ns
RECEIVER DISABLE
From Output LOW
TBD
ns
From Output HIGH
TBD
ns
Input A–B
CL = 15pF; Figure 1, 3
10% to 90%
90% to 10%
CL = 15pF; Figures 2 and 4
(S2 closed)
CL = 15pF; Figures 2 and 4
(S1 closed)
CL = 15pF; Figures 2 and 4
(S1 closed)
CL = 15pF; Figures 2 and 4
(S2 closed)
F = 1MHZ: tr < 10ns: tf < 10ns
+VOD
0V
–VOD
0V
tPLH
tPHL
RO
CONDITIONS
VOH
1.5V
VOL
1.5V
Figure 1. Receiver Propagation Delays
F = 1MHZ: tr < 10ns: tf < 10ns
3V
EN
0V
1.5V
1.5V
tLZ
tZL
RO
5V
1.5V
Output normally low
VOL
tZH
RO
VOH
0V
tHZ
Output normally high
1.5V
0.5V
0.5V
Figure 2. Receiver Enable/Disable Timing
SP488A/489ADS/07
SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers
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© Copyright 2000 Sipex Corporation
PRELIMINARY INFORMATION
PINOUT
16
VCC
15
RI4B
14
RI4A
4
13
RO4
RO2
5
12
EN3/EN4
RO3
RI2A
6
11
RO3
10
RI3A
RI2B
7
10
RI3A
9
RI3B
GND
8
9
RI3B
16
VCC
RI1B
1
15
RI4B
RI1A
2
14
RI4A
RO1
3
4
13
RO4
EN1/EN2
RO2
5
12
EN
RI2A
6
11
RI2B
7
GND
8
RI1B
1
RI1A
2
RO1
3
EN
SP488A
1
4
2
3
SP489A
1
4
2
3
SP488A PINOUT
Pin 1 — RI1B — Receiver 1 input B.
Pin 9 — RI3B — Receiver 3 input B.
Pin 2 — RI1A — Receiver 1 input A.
Pin 10 — RI3A — Receiver 3 input A.
Pin 3 — RO1 — Receiver 1 Output — If Receiver 1 output is enabled, if RI1A > RI1B by
200mV, Receiver output is high. If Receiver 1
output is enabled, and if RI1A < RI1B by 200mV,
Receiver 1 output is low.
Pin 11 — RO3 — Receiver 3 Output — If
Receiver 3 output is enabled, if RI3A > RI3B by
200mV, Receiver 3 output is high. If Receiver 3
output is enabled, and if RI3A < RI3B by
200mV, Receiver 3 output is low.
Pin 4 — EN — Receiver Output Enable. Please
refer to SP488A Truth Table (1).
Pin 12 — EN — Receiver Output Enable. Please
refer to SP488A Truth Table (1).
Pin 5 — RO2 — Receiver 2 Output — If Receiver 2 output is enabled, if RI2A > RI2B by
200mV, Receiver 2 output is high. If Receiver 2
output is enabled, and if RI2A < RI2B by
200mV, Receiver 2 output is low.
Pin 13 — RO4 — Receiver 4 Output — If
Receiver 4 output is enabled, if RI4A > RI4B by
200mV, Receiver 4 output is high. If Receiver 4
output is enabled, and if RI4A < RI4B by
200mV, Receiver 4 output is low.
Pin 6 — RI2A — Receiver 2 input A.
Pin 14 — RI4A — Receiver 4 input A.
Pin 7 — RI2B — Receiver 2 input B.
Pin 15 — RI4B — Receiver 4 input B.
Pin 8 — GND — Digital Ground.
Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC ≤
5.25V.
SP488A/489ADS/07
SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers
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© Copyright 2000 Sipex Corporation
PRELIMINARY INFORMATION
50pF EN
S1
A
1kΩ
VCC
RCVR
DI
DRIVER
B
54Ω
RCVR
CL
ROn
CL
1kΩ
S2
50pF
EN
1/4 SP486
1/4 SP488
Figure 3. Timing Test Circuit
Figure 4. Enable/Disable Timing Test Circuit
SP489A PINOUT
Pin 1 — RI1B — Receiver 1 input B.
Pin 9 — RI3B — Receiver 3 input B.
Pin 2 — RI1A — Receiver 1 input A.
Pin 10 — RI3A — Receiver 3 input A.
Pin 3 — RO1 — Receiver 1 Output — If Receiver 1 output is enabled, if RI1A > RI1B by
200mV, Receiver output is high. If Receiver 1
output is enabled, and if RI1A < RI1B by 200mV,
Receiver 1 output is low.
Pin 11 — RO3 — Receiver 3 Output — If
Receiver 3 output is enabled, if RI3A > RI3B by
200mV, Receiver 3 output is high. If Receiver 3
output is enabled, and if RI3A < RI3B by
200mV, Receiver 3 output is low.
Pin 4 — EN1/EN2 — Receiver 1 and 2 Output
Enable. Please refer to SP489A Truth Table (2).
Pin 12 — EN3/EN4 — Receiver 3 and 4 Output
Enable. Please refer to SP489A Truth Table (2).
Pin 5 — RO2 — Receiver 2 Output — If Receiver 2 output is enabled, if RI2A > RI2B by
200mV, Receiver 2 output is high. If Receiver 2
output is enabled, and if RI2A < RI2B by
200mV, Receiver 2 output is low.
Pin 13 — RO4 — Receiver 4 Output — If
Receiver 4 output is enabled, if RI4A > RI4B by
200mV, Receiver 4 output is high. If Receiver 4
output is enabled, and if RI4A < RI4B by
200mV, Receiver 4 output is low.
Pin 6 — RI2A — Receiver 2 input A.
Pin 14 — RI4A — Receiver 4 input A.
Pin 7 — RI2B — Receiver 2 input B.
Pin 15 — RI4B — Receiver 4 input B.
Pin 8 — GND — Digital Ground.
Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC ≤
5.25V.
SP488A/489ADS/07
SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers
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© Copyright 2000 Sipex Corporation
PRELIMINARY INFORMATION
DIFFERENTIAL
A–B
EN
ENABLES
EN
OUTPUT
RO
DIFFERENTIAL
A–B
ENABLES
EN1/EN2 or EN3/EN4
OUTPUT
RO
VID ≥ 0.2V
H
H
–0.2V < VID < +0.2V
H
X
VID ≤ 0.2V
H
L
X
L
Hi–Z
VID ≥ 0.2V
H
X
X
L
H
H
–0.2V < VID < +0.2V
H
X
X
L
X
X
VID ≤ 0.2V
H
X
X
L
L
L
X
L
H
Hi–Z
Table 2. SP489A Truth Table
Table 1. SP488A Truth Table
FEATURES…
The SP488A and SP489A are low–power quad
differential line receivers meeting RS-485 and
RS-422 serial protocol. The SP488A and
SP489A feature Sipex's BiCMOS process
allowing low power operational characteristics
of CMOS technology while meeting all of the
demands of the RS-485 and RS-422 serial
protocols over 10Mbps under load in harsh
environments. In fact, the SP488A and SP489A
can transmit signals up to 30Mbps.
Normally an RS-485 driver will produce no less
than 1.5V before cable attenuation. After cable
loss, the signal may degrade and have an
amplitude of less than 1.0V. The receiver input
sensitivity of the SP488A and SP489A allows
the devices to receive signals as low as 200mV.
The SP488A features active high and active
low common receiver enable controls; the
SP489A provides independent, active high
receiver enable controls for each pair of
receivers. Both feature tri–state outputs and
a -7V to +12V common–mode input range
permitting a ±7V ground difference between
devices on the communications bus. The
SP488A/489A are equipped with a fail–safe
feature which forces a logic high at the
receiver output when the input is left floating.
Both are available in 16-pin plastic DIP and
SOIC packages.
The RS-485 standard is ideal for multi-drop
applications and for long-distance communication. RS-485 allows up to 32 drivers and 32
receivers to be connected to a data bus, making
it an ideal choice for multi-drop applications.
Since the cabling can be as long as 4,000 feet,
RS-485 transceivers are equipped with a wide
(-7V to +12V) common mode range to
accommodate ground potential differences.
Because RS-485 is a differential interface,
data is virtually immune to noise in the
transmission line.
SP488A/489ADS/07
SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers
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© Copyright 2000 Sipex Corporation
PRELIMINARY INFORMATION
ORDERING INFORMATION
Quad RS485 Receivers:
Model ........................ Enable/Disable ...................................... Temperature Range ........................ Package
SP488ACP ............... Common; active Low and Active High .. 0°C to +70°C .................... 16–pin Plastic DIP
SP488ACT ................ Common; active Low and Active High .. 0°C to +70°C ............................. 16–pin SOIC
SP488AEP ................ Common; active Low and Active High .. –40°C to +85°C ................ 16–pin Plastic DIP
SP488AET ................ Common; active Low and Active High .. –40°C to +85°C ......................... 16–pin SOIC
SP489ACP ............... One per driver pair; active High ............ 0°C to +70°C .................... 16–pin Plastic DIP
SP489ACT ................ One per driver pair; active High ............ 0°C to +70°C ............................. 16–pin SOIC
SP489AEP ................ One per driver pair; active High ............ –40°C to +85°C ................ 16–pin Plastic DIP
SP489AET ................ One per driver pair; active High ............ –40°C to +85°C ......................... 16–pin SOIC
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: [email protected]
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
SP488A/489ADS/07
SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers
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© Copyright 2000 Sipex Corporation