®
SP522/SP524
Low-Cost Programmable
Multi-Protocol Transceivers
■ SP522 — 2 Drivers and 2 Receivers
■ SP524 — 4 Drivers and 4 Receivers
■ Driver and Receiver Tri-State Control
■ Low-Cost WAN Solution
■ Loopback Function for Diagnostics
■ Software Selectable Interface Modes:
-RS-232 (V.28), RS-423 (V.10)
-RS-422 (V.11, X.21), RS-485
DESCRIPTION
The SP522/524 is a monolithic device that supports three serial interface standards for Wide
Area Network Connectivity. The SP522/524 is ideally suited for multi-protocol designs that are
cost and space sensitive. The SP522/524 is fabricated using a low power BiCMOS process
technology. Two (2) drivers and two (2) receivers for the SP522 can be configured via software
for any of the above interface modes at any time. The SP524 offers two (2) additional drivers
and two (2) additional receivers.
+5V
VDD
IN5819
+5V
VDD
10µF
1N5819
VSS
VSS
10µF
10µF
+
28
13
VCC
VDD
19
LATCH_EN
30
31
DP0
22
VSS
DECODER LOGIC
32
DP1
LOOPBCK
23
SP522
9
T2IN
4
ENT2
1
R1OUT
5
ENR1
24
R2OUT
3
ENR2
T2
R1
R2
T2
R1
ENR1
43
R2OUT
39
LOOPBACK PATHS
25
T2IN
35
ENT2
44
R1OUT
40
T1OUTA
11
T1OUTB
12
T1
T2OUTA
18
T2OUTB
17
R1INA
3
R1INB
4
R2INA
5
R2INB
6
R2
ENR2
T2OUTA
15
T2OUTB
16
R1INA
18
R1INB
17
26
T3IN
34
ENT3
27
T4IN
33
ENT4
42
R3OUT
38
ENR3
41
R4OUT
37
R2INA
20
R2INB
19
T3OUTA
16
T3OUTB
15
T3
T4
R3
T4OUTA
13
T4OUTB
11
R3INA
7
R3INB
8
R4INA
9
R4INB
10
R4
ENR4
GND
14
Rev. 7/10/03
LOOPBCK
23
T1OUTA
22
T1OUTB
20
T1
LOOPBACK PATHS
10
T1IN
6
ENT1
DECODER LOGIC
LOOPBACK PATHS
7
DP1
24
T1IN
36
ENT1
LATCH_EN
2
8
DP0
10µF
29
VSS
VCC VCC
SP524
10µF
+
21
14
2
VCC
VDD
10µF
GND
1
SP522 Multi–Mode Serial Transceivers
1
GND
12
GND
21
© Copyright 2003 Sipex Corporation
SPECIFICATIONS
Typical @ 25°C and nominal supply voltages unless otherwise noted.
MIN.
LOGIC INPUTS
VIL
VIH
LOGIC OUTPUTS
VOL
VOH
RS422 DRIVER
TTL Input Levels
VIL
VIH
Outputs
Differential Output
Open Circuit Voltage,VO
Balance
Offset
Short Circuit Current
Power Off Current
Transition Time
Max. Transmission Rate
Propagation Delay
tPHL
tPLH
RS422 RECEIVER
TTL Output Levels
VOL
VOH
Input
High Threshold
Low Threshold
Common Mode Range
High Input Current
Low Input Current
Receiver Sensitivity
Input Impedance
Max. Transmission Rate
Propagation Delay
tPHL
tPLH
RS485 DRIVER
TTL Input Levels
VIL
VIH
Outputs
Differential Output
Open Circuit Voltage,VO
Balance
Output Current
Short Circuit Current
Transition Time
Max. Transmission Rate
Propagation Delay
tPHL
tPLH
Rev. 7/10/03
TYP.
MAX.
UNITS
0.8
Volts
Volts
0.4
Volts
Volts
0
2.0
0.8
Volts
Volts
+2.0
+5.0
+6.0
+0.4
+3.0
+150
+100
40
Volts
Volts
Volts
Volts
mA
µA
nS
Mbps
150
150
nS
nS
0.4
Volts
Volts
+6.0
-0.3
+7.0
Volts
Volts
Volts
2.0
2.4
10
90
90
2.4
+0.3
-6.0
-7.0
+0.3
Volts
kΩ
Mbps
175
175
nS
nS
0.8
Volts
Volts
+5.0
+6.0
+0.2
Volts
Volts
Volts
mA
mA
nS
Mbps
4
10
110
110
2.0
+1.5
28.0
+200
40
10
100
100
150
150
SP522 Multi–Mode Serial Transceivers
2
nS
nS
CONDITIONS
IOUT = –3.2mA
IOUT = 1.0mA
R=50Ω; see Figure 1
|VT| – |VT|
Vout = 0V
Vcc = 0V, Vout = +0.25V
Rise/fall time, 10%-90%
RL=100Ω
TA = +25°C
RDIFF=100Ω, Figures 3 & 5
RDIFF=100Ω, Figures 3 & 5
(a)-(b)
(a)-(b)
Refer to Rec. input graph
Refer to Rec. input graph
VCM = +7V to -7V
TA = +25°C
Figures 3 & 7
Figures 3 & 7
R=27Ω; CL=50pF; see Fig. 1
|VT| – |VT|
RL=54Ω
Vout = –7V to +7V
Rise/fall time, 10%-90%
RL=54Ω
Figures 3 & 5; TA = +25°C
RDIFF=54Ω, CRL = 50pF
RDIFF=54Ω, CRL = 50pF
© Copyright 2003 Sipex Corporation
SPECIFICATIONS
Typical @ 25°C and nominal supply voltages unless otherwise noted.
MIN.
RS485 RECEIVER
TTL Output Levels
VOL
VOH
Input
Common Mode Range
High Input Current
Low Input Current
Receiver Sensitivity
Input Impedance
Max. Transmission Rate
Propagation Delay
tPHL
tPLH
RS232 DRIVER
TTL Input Level
VIL
VIH
Outputs
High Level Output
Low Level Output
Open Circuit Voltage
Short Circuit Current
Power Off Impedance
Slew Rate
Transition Time
Max. Transmission Rate
Propagation Delay
tPHL
tPLH
RS232 RECEIVER
TTL Output Levels
VOL
VOH
Input
High Threshold
Low Threshold
Receiver Open Circuit Bias
Input Impedance
Max. Transmission Rate
Propagation Delay
tPHL
tPLH
RS423 DRIVER
TTL Input Levels
VIL
VIH
Output
High Level Output
Low Level Output
Open Circuit Voltage
Short Circuit Current
Rev. 7/10/03
TYP.
MAX.
UNITS
0.4
Volts
Volts
+12.0
Volts
2.4
-7.0
Volts
kΩ
Mbps
±0.1
12
10
110
110
175
175
nS
nS
0.8
Volts
Volts
+15
-5.0
+15
+100
Volts
Volts
Volts
mA
Ω
V/µs
2.0
+5.0
-15.0
-15
300
30
1.5
120
2
2
8
8
3
120
1.7
1.2
Volts
Volts
3.0
Volts
Volts
Volts
KΩ
Kbps
5
+2.0
7
0.2
0.2
1
1
µS
µS
0.8
Volts
Volts
+6.0
-3.6
+6.0
+150
Volts
Volts
Volts
mA
2.0
+3.6
-6.0
+4.0
µS
µS
0.4
2.4
0.8
µs
Kbps
SP522 Multi–Mode Serial Transceivers
3
CONDITIONS
Refer to Rec. input graph
Refer to Rec. input graph
VCM = +12V to -7V
VCM = +12V to -7V
TA = +25°C
Figures 3 & 7
Figures 3 & 7
RL=3KΩ, VIN=0.8V
RL=3KΩ, VIN=2.0V
Vout = 0V
Vcc = 0V, Vout = ±2.0V
RL=3KΩ, CL=50pF,
between +3V to –3V
RL=3KΩ, CL=2500pF
RL=3KΩ, CL=2500pF
TA = +25°C
RL=3KΩ
RL=3KΩ
TA = +25°C
VDD = +5V, VSS = –5V
RL=450Ω, VT = 0.9*VOC
RL=450Ω, VT = 0.9*VOC
VOUT = 0V
© Copyright 2003 Sipex Corporation
SPECIFICATIONS (Continued)
Typical @ 25°C and nominal supply voltages unless otherwise noted.
MIN.
TYP.
MAX.
UNITS
RS-423 DRIVER
Power Off Current
±100
µA
Transition Time
1.0
µs
Max. Transmission Rate
120
Kbps
Propagation Delay
tPHL
2
8
µS
tPLH
2
8
µS
RS423 RECEIVER
TTL Output Levels
VOL
0
0.4
Volts
VOH
2.4
Volts
Input
High Threshold
+0.3
+7.0
Volts
Low Threshold
-7.0
-0.3
Volts
Common Mode Range
-7.0
+7.0
Volts
High Input Current
Low Input Current
Receiver Sensitivity
+0.3
Volts
Input Impedance
4
KΩ
Max. Transmission Rate
120
Kbps
Propagation Delay
tPHL
0.5
1
µS
tPLH
0.5
1
µS
POWER REQUIREMENTS
VCC
+4.75
+5.0
+5.25
Volts
VDD
+9.5
+10.0
+10.5
Volts
VSS
-9.5
-10.0
-10.5
Volts
ICC
4
mA
IDD
10
mA
ISS
10
mA
ENVIRONMENTAL AND MECHANICAL
Operating Temperature Range
0
+70
°C
Storage Temperature Range
-65
+150
°C
Package
24-pin SOIC, 24-pin SSOP, 44–pin QFP
CONDITIONS
VCC = 0V, VOUT= +0.25V
Rise/fall time, 10-90%
RL=450Ω
TA = +25°C
RL=450Ω
RL=450Ω
Refer to Rec. input graph
Refer to Rec. input graph
VCM = +7V to -7V
VIN = +10V to -10V
TA = +25°C
VCC = +5V; DP0=DP1=0V
VDD = +10V; DP0=DP1=0V
VSS = –10V; DP0=DP1=0V
RECEIVER INPUT GRAPHS
V.11 RECEIVER
–10V
–3.25mA
Rev. 7/10/03
–3V
–10V
+6V
+10V
Maximum Input Current
versus Voltage
+3.25mA
+1.0mA
–7V
–3V
+3V
V.10 RECEIVER
RS485 RECEIVER
+3.25mA
–0.6mA
+12V
1 Unit Load
Maximum Input Current
versus Voltage
SP522 Multi–Mode Serial Transceivers
4
–3V
+3V
+10V
Maximum Input Current
versus Voltage
–3.25mA
© Copyright 2003 Sipex Corporation
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 of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may
affect reliability.
VCC............................................................................+7V
VDD........................................................................+12V
VSS..........................................................................–12V
Input Voltages
Logic...............................-0.5V to (VCC+0.5V)
Drivers............................-0.5V to (VCC+0.5V)
Receivers..........................±30V@≤100mA
Outputs Voltages
Logic................................-0.5V to (VCC+0.5V)
Drivers................................................+15V
Receivers........................-0.5V to (VCC+0.5V)
Storage Temperature..........................-65˚C to +150˚C
Power Dissipation.........................................2000mW
OTHER AC CHARACTERISTICS
(Typical @ 25°C and nominal supply voltages unless otherwise noted)
PARAMETER
MIN.
TYP.
MAX.
UNITS
DRIVER DELAY TIME FROM ENABLE MODE TO TRI–STATE MODE
SINGLE–ENDED MODE (RS-232, RS-423)
tPZL; Enable to Output low
600
ns
tPZH; Enable to Output high
300
ns
tPLZ; Disable from Output low
300
ns
tPHZ; Disable from Output high
900
ns
DIFFERENTIAL MODE (RS-422, RS-485)
tPZL; Enable to Output low
100
ns
tPZH; Enable to Output high
120
ns
tPLZ; Disable from Output low
100
ns
tPHZ; Disable from Output high
160
ns
RECEIVER DELAY TIME FROM ENABLE MODE TO TRI–STATE MODE
SINGLE–ENDED MODE (RS-232, RS-423)
tPZL; Enable to Output low
125
ns
tPZH; Enable to Output high
120
ns
tPLZ; Disable from Output low
90
ns
tPHZ; Disable from Output high
90
ns
DIFFERENTIAL MODE (RS-422, RS-485)
tPZL; Enable to Output low
125
ns
tPZH; Enable to Output high
120
ns
tPLZ; Disable from Output low
90
ns
tPHZ; Disable from Output high
90
ns
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
5
CONDITIONS
3KΩ pull–up to output
3KΩ pull–down to output
5V to input
GND to input
CL = 100pF, Fig. 4 & 6; S1
closed
CL = 100pF, Fig. 4 & 6; S2
closed
CL = 15pF, Fig. 4 & 6; S1
closed
CL = 15pF, Fig. 4 & 6; S2
closed
3KΩ pull–up to output
3KΩ pull–down to output
5V to input
GND to input
CRL = 15pF, Fig. 2 & 8; S1
closed
CRL = 15pF, Fig. 2 & 8; S2
closed
CRL = 15pF, Fig. 2 & 8; S1
closed
CRL = 15pF, Fig. 2 & 8; S2
closed
© Copyright 2003 Sipex Corporation
A
VCC
S1
VOD
CRL
R
1K
Test Point
Receiver
Output
R
1K
VOC
S2
B
Figure 1. Driver DC Test Load Circuit
Figure 2. Receiver Timing Test Load Circuit
3V
DE
CL1
A
DI
A
RDIFF
Output
Under
Test
RO
B
B
CL2
15pF
VCC
S1
500
CL
S2
Figure 3. Driver/Receiver Timing Test Circuit
+3V
Figure 4. Driver Timing Test Load #2 Circuit
f = 1MHz; tR < 10ns; tF < 10ns
1.5V
DRIVER INPUT
1.5V
0V
A
DRIVER
OUTPUT
tPLH
tPHL
VO 1/2VO
1/2VO
B
DIFFERENTIAL VO+
OUTPUT 0V
VA – VB VO–
tSKEW
tSKEW
tF
tR
Figure 5. Driver Propagation Delays
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
6
© Copyright 2003 Sipex Corporation
f = 1MHz; tR < 10ns; tF < 10ns
+3V
1.5V
DE
0V
1.5V
tZL
tLZ
5V
2.3V
A, B
VOL
VOH
A, B
2.3V
0V
Output normally LOW
0.5V
Output normally HIGH
0.5V
tZH
tHZ
Figure 6. Driver Enable and Disable Times
f = 1MHz; tR ≤ 10ns; tF ≤ 10ns
VOD2+
0V
A–B
VOD2–
VOH
RECEIVER OUT
VOL
0V
INPUT
1.5V
1.5V
OUTPUT
tPHL
tPLH
Figure 7. Receiver Propagation Delays
+3V
RE
0V
1.5V f = 1MHz; t < 10ns; t < 10ns
R
F
tZL
1.5V
tLZ
5V
1.5V
R
VIL
Output normally LOW
0.5V
Output normally HIGH
0.5V
VIH
R
1.5V
0V
tZH
tHZ
Figure 8. Receiver Enable and Disable Times
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
7
© Copyright 2003 Sipex Corporation
PINOUT (24-PIN SOIC & SSOP)
R1OUT 1
LATCH_EN 2
ENR2 3
ENT2 4
ENR1 5
ENT1 6
DP1 7
DP0 8
T2IN 9
T1IN 10
T1OUTA 11
T1OUTB 12
SP522
24
23
22
21
20
19
18
17
16
15
14
13
R2OUT
LOOPBCK
VSS
VDD
R2INA
R2INB
R1INA
R1INB
T2OUTB
T2OUTA
GND
VCC
44
43
42
41
40
39
38
37
36
35
34
R1OUT
R2OUT
R3OUT
R4OUT
ENR1
ENR2
ENR3
ENR4
ENT1
ENT2
ENT3
PINOUT (44-PIN QFP)
1
2
3
4
5
6
7
8
9
10
11
SP524
33
32
31
30
29
28
27
26
25
24
23
ENT4
DP1
DP0
LATCH_EN
VSS
VDD
TIN4
TIN3
TIN2
TIN1
LOOPBCK
GND
T4OUTA
VCC
T3OUTB
T3OUTA
T2OUTB
T2OUTA
VCC
T1OUTB
GND
T1OUTA
12
13
14
15
16
17
18
19
20
21
22
GND
VCC
R1INA
R1INB
R2INA
R2INB
R3INA
R3INB
R4INA
R4INB
T4OUTB
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
8
© Copyright 2003 Sipex Corporation
FEATURES
The SP522 and SP524 is a highly integrated
serial transceiver that offers programmability
between interface modes through software control. The SP522 and SP524 offers the hardware
interface modes for RS-232 (V.28), RS-422A
(V.11), RS-423 (V.10), and RS-485. The interface mode selection is done via two control
pins. The SP522 contains two (2) independent
drivers and two (2) independent receivers. The
SP524 is basically two SP522 functions on one
silicon, thus having four (4) drivers and four (4)
receivers.
functionality of the drivers are set up to accommodate the selected interface mode. As the
mode of the drivers is changed, the electrical
characteristics will change to support the
required signal levels. The mode of each driver
in the different interface modes that can be
selected is shown in Figures 10 to 13.
There are three basic types of driver circuits —
RS-232, RS-423, and RS-485.
The RS-232 drivers output single–ended signals
with a minimum of +5V (with 3KΩ and 2500pF
loading), and can operate up to 120Kbps. The
RS-232 drivers are used in RS-232 mode for all
signals, and also in V.35 mode where they are
used as the control line signals such as DTR and
RTS.
The SP522/SP524 is ideally suited for low-cost
wide area network connectivity and other multiprotocol applications. Based on our previous
multi-mode SP500 family, Sipex has allocated
specific transceiver cells or "building blocks"
from the SP503 and created the SP522. The
"building block" concept is that these small
transceiver cells can be packaged to offer a
simple low-cost solution to networking applications that need only two to four interface
modes. The SP522 can be connected in series
to build multiple channels needed for the specific application. Sipex has conveniently
doubled the SP522 transceiver cell into the
SP524 on a single silicon. For example in a 8channel application requiring eight transceivers, the design can be implemented using two
SP524 devices. The SP522 and SP524 can also
be implemented in series with our SP500 family. An application needing 9-channels can use
the SP504 containing seven (7) transceivers
with the SP522.
The RS-423 drivers are also single–ended
signals with a minimum voltage output of
+3.6V (with 450Ω loading) and can operate up
to 120Kbps. Open circuit V OL and V OH
measurements are +4.0V to +6.0V when
supplying +5V to VDD and VSS. The RS-423
drivers can be used in RS-449, EIA-530, EIA530A and V.36 applications as Category II
signals from each of their corresponding
specifications.
The third type of driver produces a differential
signal that can maintain RS-485, +1.5V differential output levels with a worst case load of
54Ω. The signal levels and drive capability of
the RS-485 drivers allow the drivers to also
support RS-422 (V.11) requirements of +2V
differential output levels with 100Ω loads. The
RS-422 drivers can be used in RS-449,
EIA-530, EIA-530A and V.36 applications as
Category I signals which are used for clock and
data.
THEORY OF OPERATION
The SP522 and SP524 are simply made up of
the drivers, receivers, and decoder. The devices
operate on three (3) power supplies; VCC at
+5V, VDD at +10V , and VSS at –10V. Each of
these circuit blocks are described in more detail
below.
The drivers also have separate enable pins which
makes the SP522/SP524 helpful for half-duplex
applications. The enable pins will tri-state the
drivers when the ENT1 and ENT2 pins are at a
logic low ("0"). For the SP524, ENT3 and ENT4
are used for the two additional drivers. During
tri-stated conditions, the driver outputs will be
at a high impedance state.
Drivers
The SP522 has two (2) enhanced independent
drivers. Control for the mode selection is done
via a two–bit control word into DP0 and DP1.
The drivers are pre-arranged such that for each
mode of operation, the relative position and
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
9
© Copyright 2003 Sipex Corporation
Unused driver inputs can be left floating; pull–
up resistors to +5V is internally connected on
the inputs so that the output is at a logic low
("0"). For differential drivers, the non-inverting
output will be at a logic high ("1").
All receivers include a fail-safe feature that
output a known logic state when the receiver
inputs are unconnected. For single-ended
RS-232 receivers, there are internal 5kΩ pulldown resistors on the inputs which produces a
logic high ("1") at the receiver outputs. The
single-ended RS-423 receivers produce a logic
low ("0") on the output when the inputs are
open. This is due to a pull-up device connected
to the input. The differential receivers have the
same internal pull-up device on the non-inverting
input which produces a logic high ("1") at the
receiver output.
Receivers
The SP522 has two (2) independent receivers
which can be programmed for the different
interface modes. Control for the mode selection
is done by DP0 and DP1.
Like the drivers, the receivers are pre-arranged
for the specific requirements of the interface. As
the operating mode of the receivers is changed,
the electrical characteristics will change to
support the required interface. Figures 10 to 13
show the mode of each receiver in the different
interface modes that can be selected.
The receivers also have enable pins which allow
for convenient half-duplex configurations. The
receivers are tri-stated when the ENR1 and
ENR2 pins are at a logic high ("1"). For the
SP524, ENR3 and ENR4 are used for the
additional two receivers.
There are three basic types of receiver circuits
— RS-232, RS-423, and RS-485.
In addition to the separate enable lines on each
transceiver, there is a latch enable pin,
LATCH_EN, which is used for enabling and
disabling the decoder control inputs (DP0, DP1)
and transceiver enable pins. This pin will
default to a logic high ("1") if not being used.
The RS-232 receiver is a single–ended input
with a threshold of 0.8V to 3.0V. The RS-232
receiver has an operating voltage range of +15V
and can receive signals up to 120Kbps. The
input sensitivity complies with EIA-RS-232 and
V.28 at +3V to -3V. The input impedance is
3kΩ to 7kΩ.
Loopback
The SP522 and SP524 contain a loopback feature that allows the driver outputs to "loopback"
to the receiver inputs for diagnostic testing in
the application. The loopback function is
activated when the LOOPBCK pin is low. When
in loopback mode, the driver outputs are
tri-stated and the receiver inputs are deactivated.
The receiver input impedance while in loopback
will be a minimum of 12kΩ. The loopback
function can be initiated during any mode of
operation, RS-232, RS-423 or RS-422. The
travel path of the transceivers in loopback is
shown on Figure 9. The loopback function
overrides the separate enable pins for the drivers
or receivers. When LOOPBCK is at a logic low
("0"), the device will be configured in loopback
regardless whether the transceiver is enabled or
disabled. If the loopback function is not
required, the LOOPBCK pin will default to a
logic high ("1") state.
The RS-423 receivers are also single–ended but
have an input threshold as low as +300mV. The
input impedance is guaranteed to be greater than
4KΩ, with an operating voltage range of +7V.
The RS-423 receivers can operate up to 120Kbps.
RS423 receivers can be used in RS-449, EIA530,
EIA-530A and V.36 applications as Category II
signals as indicated by their corresponding
specifications.
The third type of receiver is a differential which
supports RS-485. The RS-485 receiver has an
input impedance of 15KΩ and a differential
threshold of +300mV. Since the characteristics
of an RS-422 (V.11) receiver are actually
subsets of RS-485, the receivers for RS-422
requirements are covered by the RS-485 receivers.
RS-422 receivers are used in applications for
RS-449, EIA530, EIA-530A and V.36 as
Category I signals for receiving clock, data, and
some control line signals. The differential
receivers can receive data up to 10Mbps.
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
10
© Copyright 2003 Sipex Corporation
+5V
VDD
IN5819
10µF
10µF
VSS
+5V
VDD
+
28
1N5819
VCC
VDD
VSS
10µF
14
2
19
VSS
VCC VCC
SP524
10µF
10µF
21
13
VCC
LATCH_EN
30
31
DP0
+
VDD
22
DECODER LOGIC
32
DP1
VSS
LOOPBCK
23
SP522
9
T2IN
4
ENT2
1
R1OUT
5
ENR1
24
R2OUT
3
ENR2
LOOPBCK
23
T2
R1
R2
14
25
T2IN
35
ENT2
44
R1OUT
40
T1OUTA
11
T1OUTB
12
T1
T2
R1
ENR1
43
R2OUT
39
T2OUTA
15
T2OUTB
16
R1INA
18
R1INB
17
T1OUTA
22
T1OUTB
20
T1
T2OUTA
18
T2OUTB
17
R1INA
3
R1INB
4
R2INA
5
R2INB
6
R2
ENR2
26
T3IN
34
ENT3
R2INA
20
R2INB
19
27
T4IN
33
ENT4
42
R3OUT
38
ENR3
41
R4OUT
37
GND
T3OUTA
16
T3OUTB
15
T3
LOOPBACK PATHS
10
T1IN
6
ENT1
DECODER LOGIC
LOOPBACK PATHS
7
DP1
24
T1IN
36
ENT1
LOOPBACK PATHS
LATCH_EN
2
8
DP0
10µF
29
T4
R3
T4OUTA
13
T4OUTB
11
R3INA
7
R3INB
8
R4INA
9
R4INB
10
R4
ENR4
GND
1
GND
12
GND
21
Figure 9. Typical Operating Circuit, SP522 and SP524
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
11
© Copyright 2003 Sipex Corporation
MODE: RS232
DRIVER
DP0
1
RECEIVER
DP0
DP1
1
0
DP1
0
SP522
R1INA (18)
T1IN (10)
R1OUT (1)
T1OUTA (11)
R2INA (20)
T2IN (9)
T2OUTA (15)
R2OUT (24)
RECEIVERS
DRIVERS
SP524
T1IN (24)
R1INA (3)
T1OUTA (22)
R1OUT (44)
T2IN (25)
R2INA (5)
T2OUTA (18)
R2OUT (43)
T3IN (26)
R3INA (7)
T3OUTA (16)
R3OUT (42)
T4IN (27)
R4INA (9)
T4OUTA (13)
R4OUT (41)
RECEIVERS
LATCH_EN
1
DRIVERS
LOOPBCK
1
ENTX
1
ENRX
0
Figure 10. Mode Diagram — RS232
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
12
© Copyright 2003 Sipex Corporation
MODE: RS423
DRIVER
DP0
1
RECEIVER
DP0
DP1
1
1
DP1
1
SP522
R1INA (18)
T1IN (10)
R1OUT (1)
T1OUTA (11)
R2INA (20)
T2IN (9)
T2OUTA (15)
R2OUT (24)
RECEIVERS
DRIVERS
SP524
T1IN (24)
R1INA (3)
T1OUTA (22)
R1OUT (44)
T2IN (25)
R2INA (5)
T2OUTA (18)
R2OUT (43)
T3IN (26)
R3INA (7)
T3OUTA (16)
R3OUT (42)
T4IN (27)
R4INA (9)
T4OUTA (13)
R4OUT (41)
RECEIVERS
LATCH_EN
1
DRIVERS
LOOPBCK
1
ENTX
1
ENRX
0
Figure 11. Mode Diagram — RS423
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
13
© Copyright 2003 Sipex Corporation
MODE: RS422/485
DRIVER
DP0
0
RECEIVER
DP0
DP1
0
1
DP1
1
SP522
R1INA (18)
T1IN (10)
R1OUT (1)
T1OUTA (11)
T1OUTB (12)
R1INB (17)
R2INA (20)
T2IN (9)
R2OUT (24)
T2OUTA (15)
T2OUTB (16)
R2INB (19)
RECEIVERS
LATCH_EN
1
DRIVERS
LOOPBCK
1
ENTX
1
ENRX
0
Figure 12. Mode Diagram — RS422/RS485 for the SP522
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
14
© Copyright 2003 Sipex Corporation
MODE: RS422/485
DRIVER
DP0
0
RECEIVER
DP0
DP1
0
1
DP1
1
SP524
R1INA (3)
T1IN (24)
R1OUT (44)
T1OUTA (22)
T1OUTB (20)
R1INB (4)
R2INA (5)
T2IN (25)
R2OUT (43)
T2OUTA (18)
T2OUTB (17)
R2INB (6)
R3INA (7)
T3IN (26)
R3OUT (42)
T3OUTA (16)
T3OUTB (15)
R3INB (8)
R4INA (9)
T4IN (27)
R4OUT (41)
T4OUTA (13)
T4OUTB (11)
R4INB (10)
RECEIVERS
LATCH_EN
1
DRIVERS
LOOPBCK
1
ENTX
1
ENRX
0
Figure 13. Mode Diagram — RS422/RS485 for the SP524
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
15
© Copyright 2003 Sipex Corporation
APPLICATIONS INFORMATION
can be programmed to RS-422 whereas a SP524
can be added and programmed to RS-423, thus
creating seven RS-422 channels and four
RS-423 channels. The SP504 and the SP522/
SP524 can be configured to custom fit the
various serial port application needs.
DCE-DTE Applications
A serial port can be easily configured for DTE
and DCE using multiple SP522 and/or SP524
parts. As shown on Figure 14, the transceivers
are half-duplexed to provide convenient DCEDTE capability. The driver outputs are connected to the receiver inputs with only one pair
out to the serial port for each driver/receiver.
When the driver is tri-stated by applying a logic
low ("0") to ENT, the receivers can be active to
receive the appropriate input. The driver output
during tri-state is high impedance, therefore
will not degrade the signal levels of the receiver
input signal. When the receiver is tri-stated by
applying a logic ("1") to ENR, the driver output
is active to drive the appropriate signal without
interference from the receiver. The receiver
inputs are at least 12kΩ to ground during tri-state.
+5V Only Operation Using the SP782
The SP522 and SP524 use external +10V or
+5V voltage supplies for power to maintain the
RS-232 and RS-423 voltage levels, respectively.
However, if a low-cost +5V solution if preferred, the SP522 and SP524 can be configured
with the SP782 or SP784 programmable charge
pump. The Sipex patent-pending programmable
charge pumps offer +10V or +5V outputs. The
programmability is used for switching from
RS-232 using the +10V outputs to RS-423 using
the +5V outputs. The SP782 requires 0.1µF
capacitors and the SP784 requires 10µF capacitors
for the charge pump. Please refer to the SP782
and SP784 data sheet for details on the programmable charge pump.
Configuring Additional Multi-Protocol
Transceivers
Serial ports usually can have two data signals
(SD, RD), three clock signals (TT, ST, RT), and
at least eight control signals (CS, RS, etc.).
EIA-RS-449 contains twenty six signal types
including for a DB-37 connector. A DB-37
serial port design may require thirteen drivers
and fourteen receivers. Although many
applications do not use all these signals, some
applications may need to support extra
functions such as diagnostics. Sipex's SP504
supports enough transceivers for the primary
channels of data, clock and control signals.
Configuring LL, RL and TM may require two
additional drivers and one receiver if designing
for a DTE (one driver and two receivers for a
DCE).
Achieving +10V with +12V Supplies
Since the SP522 and SP524 use external +10V
supplies, systems that have +12V supplies must
be regulated down to +10V. This can be simply
configured by placing diodes in series with the
VDD and VSS lines. The absolute maximum
supply voltage is +12V. Since most +12V power
supplies have some voltage tolerances, usually
+10%, any increase above the 12V maximum
will damage the device. However, the +12V
supply may be used providing that the maximum
supply voltages do not exceed the rated absolute
maximum VSS and VDD.
Sequencing of Power Supplies
Power Supplies for the SP522 and SP524 must
be sequenced. The recommended sequence is
VCC first, VDD 50-80µSec later and VSS 100 to
1,000µSec after VDD. There are no sequencing
requirements for the SP522 or SP524 when they
are powered from either the SP782 or SP784
charge pump devices or from the VDD and VSS
supply pins of the SP504 or SP505 charge pump
powered devices. For further details, see the
application note, VDD, VCC and VSS Power
Supply Sequencing.
The SP522 and SP524 is a convenient solution
in a design that requires two extra single ended
or differential transceivers. The SP504 and
SP522, shown in Figure 15, can be programmed
in various configurations. The SP504 is
programmed for RS-449 mode. By connecting
the decoder pins of the SP504 to the DP0 and
DP1 pins accordingly, the SP522 is programmed
in RS-423 mode. This adds two single ended
transceivers to the application. For applications
needing more than five RS-422 transceivers or
more than three RS-423 transceivers, the SP504
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
16
© Copyright 2003 Sipex Corporation
+5V
+
+10V
+
10µF
13
7
VCC
DP1
8
DP0 SP522
2
10µF
21
VDD
22
VSS
–10V
+
10µF
LATCH_EN
11
10
12
6
18
1
17
5
15
9
16
4
20
24
19
3
LOOPBCK
GND
+5V
+
6
14
+10V
+
10µF
2 14 19 28
VDD
VCC
32
29
DP1
VSS
31
DP0 SP524
+
30
10µF
–10V
10µF
LATCH_EN
22
24
20
36
3
44
4
40
18
25
17
35
5
43
6
39
16
26
15
34
7
42
8
38
13
27
11
33
9
41
10
37
LOOPBCK
23
GND GND GND
1
12
21
Figure 14. DTE/DCE Application with the SP522 and SP524
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
17
© Copyright 2003 Sipex Corporation
1N5819
22µF 22µF
+
+
VCC
30
28
31
VDD C1+ C1- C2+ C232
VSS
+ 22µF
DB-37 Connector
SP504CF
Drivers
61
TxD
14
59
DTR
13
56
RTS
16
52
TxC
15
65
ST
22
44
RL
17
45
54
63
42
47
70
RxD
1
RS-449 Mode
0
1
1
38
66
67
DSR
78
69
DCD
19
36
RI
21
40
SCT
79
77
12
11
10
9
6
24
8
26
9
27
11
29
13
31
15
71
37
CTS
80
68
35
39
76
TDEC0
RDEC0
2
TDEC1
RDEC1
3
TDEC2
RDEC2
4
RDEC3
5
TDEC3
CIRCUIT
CIRCUIT NAME
MNEMONIC
10
49
RxC
20
0
14
51
LL
24
Receivers
4
22
12
30
7
25
17
35
58
5
23
Tied to TDEC0
Tied to TDEC1
see pinout diagram for various ground pins
CIRCUIT
CIRCUIT
DIRECTION
TYPE
SG
SIGNAL GROUND
--------------
SC
RC
IS
IC
TR
DM
SD
RD
TT
ST
RT
RS
CS
RR
SQ
NS
SF
SR
SI
SSD
SRD
SRS
SCS
SRR
LL
RL
TM
SS
SB
SEND COMMON
RECEIVE COMMON
TERMINAL IN SERVICE
INCOMING CALL
TERMINAL READY
DATA MODE
SEND DATA
RECEIVE DATA
TERMINAL TIMING
SEND TIMING
RECEIVE TIMING
REQUEST TO SEND
CLEAR TO SEND
RECEIVER READY
SIGNAL QUALITY
NEW SIGNAL
SELECT FREQUENCY
SIGNAL RATE SELECTOR
SIGNAL RATE INDICATOR
SECONDARY SEND DATA
SECONDARY RD
SECONDARY RS
SECONDARY CS
SECONDARY RR
LOCAL LOOPBACK
REMOTE LOOPBACK
TEST MODE
SELECT STANDBY
STANDBY INDICATOR
TO DCE
FROM DCE
TO DCE
FROM DCE
TO DCE
FROM DCE
TO DCE
FROM DCE
TO DCE
FROM DCE
FROM DCE
TO DCE
FROM DCE
FROM DCE
FROM DCE
TO DCE
TO DCE
TO DCE
FROM DCE
TO DCE
FROM DCE
TO DCE
FROM DCE
FROM DCE
TO DCE
TO DCE
FROM DCE
TO DCE
FROM DCE
COMMON
CONTROL
DATA
TIMING
CONTROL
DATA
CONTROL
PRIMARY CHANNEL
+
27 26
various VCC
+ supply pins
10µF
SECONDARY
CHANNEL
22µF
+5V
CONTROL
CONTROL
RS-449 Interchange Circuits Table
+5V
+
+5V
+
10µF
13
7
8
2
VCC
DP1
DP0
SP522
10µF
21
VDD
22
VSS
–5V
+
10µF
LATCH_EN
10
11
9
15
6
RS-423 Outputs
4
1
20
5
18
24
RS-423 Inputs
3
LOOPBCK
GND 14
Figure 15. Adding extra channels using the SP522 and SP504
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
18
© Copyright 2003 Sipex Corporation
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(WIDE)
E
H
D
A
Ø
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
Rev. 7/10/03
A1
L
24–PIN
A
0.093/0.104
(2.352/2.649)
A1
0.004/0.012
(0.102/0.300)
B
0.013/0.020
(0.330/0.508)
D
0.599/0.614
(15.20/15.59)
E
0.291/0.299
(7.402/7.600)
e
0.050 BSC
(1.270 BSC)
H
0.394/0.419
(10.00/10.64)
L
0.016/0.050
(0.406/1.270)
Ø
0°/8°
(0°/8°)
SP522 Multi–Mode Serial Transceivers
19
© Copyright 2003 Sipex Corporation
PACKAGE: PLASTIC SHRINK
SMALL OUTLINE
(SSOP)
E
H
D
A
Ø
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
Rev. 7/10/03
A1
L
24–PIN
A
0.068/0.078
(1.73/1.99)
A1
0.002/0.008
(0.05/0.21)
B
0.010/0.015
(0.25/0.38)
D
0.317/0.328
(8.07/8.33)
E
0.205/0.212
(5.20/5.38)
e
0.0256 BSC
(0.65 BSC)
H
0.301/0.311
(7.65/7.90)
L
0.022/0.037
(0.55/0.95)
Ø
0°/8°
(0°/8°)
SP522 Multi–Mode Serial Transceivers
20
© Copyright 2003 Sipex Corporation
PACKAGE: 44 Pin MQFP
1
1
0.30" RAD. TYP.
D
D1
D2
c
0.20" RAD. TYP.
1
CL
-B- E2
-A-
E1
5°-16°
E
0° MIN.
0°–7°
-D-
5°-16°
L
CL
L1
A2
A
b
e
DIMENSIONS
Minimum/Maximum
(mm)
SYMBOL
Seating
Plane
A1
MIN
NOM
A
A1
0.00
A2
1.80
b
0.29
SYMBL MIN
c
0.11
MAX
L
0.73
2.45
L1
NOM
MAX
23.00
0.88
1.03
1.60 BASIC
0.25
2.00
2.20
0.45
D
13.20 BSC
D1
10.00 BSC
D2
COMMON DIMENTIONS
44–PIN MQFP
JEDEC MS-022
(AB) Variation
8.00 REF
E
13.20 BSC
E1
10.00 BSC
E2
8.00 REF
e
0.80 BSC
N
44
44 PIN MQFP (MS-022 BC)
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
21
© Copyright 2003 Sipex Corporation
PACKAGE: 44 Pin LQFP
0.2 RAD. MAX.
D
c
D1
0.08 RAD. MIN.
Pin 1
11° - 13°
E1
CL
0° Min
E
0°–7°
11° - 13°
-D-
L
L1
CL
A2
A
b
DIMENSIONS
Minimum/Maximum
(mm)
SYMBOL
A1
e
COMMON DIMENTIONS
44–PIN LQFP
JEDEC MS-026
(BCB) Variation
MIN
NOM MAX
SYMBL MIN
1.60
A
A1
0.05
A2
1.35
1.40
1.45
b
0.30
0.37
0.50
D
D1
10.00 BSC
e
0.80 BSC
E
12.00 BSC
E1
10.00 BSC
N
44
c
0.11
L
0.45
L1
0.15
12.00 BSC
Seating
Plane
NOM
MAX
23.00
0.60
0.75
1.00 BASIC
44 PIN LQFP
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
22
© Copyright 2003 Sipex Corporation
ORDERING INFORMATION
Model
Temperature Range
Package Types
SP522CT ........................................................................... 0°C to +70°C .............................................................................................. 24-pin SOIC
SP522CA .......................................................................... 0°C to +70°C ............................................................................................. 24-pin SSOP
SP524CF ........................................................................... 0°C to +70°C ............................................................................................ 44-pin MQFP
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: [email protected]
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.
Rev. 7/10/03
SP522 Multi–Mode Serial Transceivers
23
© Copyright 2003 Sipex Corporation