SIPEX SP3223EEA/TR

SP3223E/EB/EU
SP3223E/EB/EU
®
Solved by
TM
Intelligent +3.0V to +5.5V RS-232 Transceivers
Intelligent
+3.0V to +5.5V RS-232 Transceivers
FEATURES
■ Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
■ Interoperable with EIA/TIA-232 and
adheres to EIA/TIA-562 down to a +2.7V
power source
■ AUTO ON-LINE® circuitry automatically
wakes up from a 1µA shutdown
■ Minimum 250Kbps data rate under load
(EB)
■ 1 Mbps data rate for high speed RS-232
(EU)
■ Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of VCC
Variations
■ ESD Specifications:
+15KV Human Body Model
+15KV IEC1000-4-2 Air Discharge
+8KV IEC1000-4-2 Contact Discharge
EN
20 SHUTDOWN
1
C1+ 2
19 VCC
V+
3
18 GND
C1-
4
17
T1OUT
16
R1IN
SP3223
C2+
5
C2-
6
15 R1OUT
V-
7
14
ONLINE
T2OUT
8
13 T1IN
R2IN
9
12 T2IN
R2OUT 10
11
STATUS
Now Available in Lead Free Packaging
DESCRIPTION
The SP3223 products are RS-232 transceiver solutions intended for portable applications
such as notebook and hand held computers. The SP3223 use an internal high-efficiency,
charge-pump power supply that requires only 0.1µF capacitors in 3.3V operation. This charge
pump and Sipex's driver architecture allow the SP3223 series to deliver compliant RS-232
performance from a single power supply ranging from +3.3V to +5.0V. The SP3223 is a 2driver/2-receiver device ideal for laptop/notebook computer and PDA applications.
The AUTO ON-LINE® feature allows the device to automatically "wake-up" during a shutdown
state when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise,
the device automatically shuts itself down drawing less than 1µA.
SELECTION TABLE
Device
Po w e r
Supplies
RS-232
Drivers
RS-232
Receivers
External
Components
AUTO ON-LINE®
Circuitry
TTL 3St a t e
# of
Pins
Gauranteed
Data Rate
ESD
Rating
SP3 2 2 3
+3.0V to +5.5V
2
2
4 capacitors
YE S
YES
20
120
2kV
SP3 2 2 3 E
+3.0V to +5.5V
2
2
4 capacitors
YE S
YES
20
120
15kV
SP3 2 2 3 B
+3.0V to +5.5V
2
2
4 capacitors
YES
YE S
20
25 0
2kV
SP3 2 2 3 EB
+3.0V to +5.5V
2
2
4 capacitors
YES
YE S
20
25 0
15kV
SP3 2 2 3 U
+3.0V to +5.5V
2
2
4 capacitors
YES
YE S
20
1000
2kV
SP3 2 2 3 EU
+3.0V to +5.5V
2
2
4 capacitors
YE S
YES
20
1000
15kV
Applicable U.S. Patents - 5,306,954; and other patents pending.
Date: 08/25/05
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
SP3223 +3.0V to +5.5V RS-232 Transceivers
1
© Copyright 2005 Sipex Corporation
© Copyright 2006 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 and cause permanent damage to the
device.
VCC.......................................................-0.3V to +6.0V
V+ (NOTE 1).......................................-0.3V to +7.0V
V- (NOTE 1)........................................+0.3V to -7.0V
V+ + |V-| (NOTE 1)...........................................+13V
ICC (DC VCC or GND current).........................+100mA
Input Voltages
TxIN, ONLINE,
SHUTDOWN, EN (SP3223)..........-0.3V to VCC + 0.3V
RxIN...................................................................+15V
Output Voltages
TxOUT.............................................................+13.2V
RxOUT, STATUS.......................-0.3V to (VCC + 0.3V)
Short-Circuit Duration
TxOUT.....................................................Continuous
Storage Temperature......................-65°C to +150°C
Power Dissipation per package
20-pin SSOP (derate 9.25mW/oC above +70oC)....750mW
20-pin TSSOP (derate 11.1mW/oC above +70oC)..900mW
NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX.
Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25°C (Note 2).
PARAMETER
MIN.
TYP.
MAX.
UNITS
CONDITIONS
Supply Current,
AUTO ON-LINE®
1.0
10
µA
All RxIN open, ONLINE = GND,
SHUTDOWN = VCC, TxIN=VCC or
GND,VCC = +3.3V, TAMB = +25° C
Supply Current, Shutdown
1.0
10
µA
SHUTDOWN = GND, TxIN=VCC or
GND, VCC = +3.3V, TAMB = +25° C
Supply Current,
AUTO ON-LINE® Disabled
0.3
1.0
mA
ONLINE = SHUTDOWN = VCC,
no load, VCC = +3.3V, TAMB = +25° C
0.8
VCC
V
DC CHARACTERISTICS
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold
LOW
HIGH
GND
2.0
VCC = +3.3V or +5.0V, TxIN,
EN, ONLINE, SHUTDOWN
Input Leakage Current
±0.01
±1. 0
µA
TxIN, EN, ONLINE, SHUTDOWN,
TAMB = +25° C, VIN = OV to VCC
Output Leakage Current
±0.05
±1 0
µA
Receivers disabled,
VOUT = OV to VCC
0.4
V
IOUT = 1.6mA
V
IOUT = -1.0mA
Output Voltage LOW
Output Voltage HIGH
VCC - 0.6
VCC - 0.1
NOTE 2: C1 - C4 0.1µF, tested at 3.3V ±10%.
C1 = 0.047µF, C2-C4 = 0.33µF, tested at 5V±10%.
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
2
© Copyright 2006 Sipex Corporation
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX.
Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25°C (Note 2).
PARAMETER
MIN.
TYP.
Output Voltage Swing
±5.0
±5. 4
Output Resistance
300
MAX.
UNITS
CONDITIONS
DRIVER OUTPUTS
Output Short-Circuit Current
±35
Output Leakage Current
V
All driver outputs loaded with 3 KΩ
to GND, TAMB = +25° C
Ω
VCC = V+ = V- = ZeroV, VOUT = ±2V
±6 0
mA
VOUT = ZeroV
±25
µA
VCC = ZeroV or 3.0V to 5.5V,
VOUT = ±12kV, Driver disabled
15
V
RECEIVER INPUTS
Input Voltage Range
-15
Input Threshold LOW
0.6
1. 2
V
VCC = 3.3V
Input Threshold LOW
0.8
1. 5
V
VCC = 5.0V
Input Threshold HIGH
1. 5
2.4
V
VCC = 3.3V
Input Threshold HIGH
1. 8
2.4
V
VCC = 5.0V
Input Hysteresis
0. 3
Input Resistance
3
V
5
7
kΩ
AUTO ON-LINE® CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = VCC)
STATUS Output Voltage LOW
STATUS Output Voltage HIGH
0.4
VCC - 0.6
V
IOUT = 1.6mA
V
IOUT = -1.0mA
Receiver Threshold to Drivers
Enabled (tONLINE)
200
µS
Figure 15
Receiver Positive or Negative
Threshold to STATUS HIGH
(tSTSH)
0.5
µS
Figure 15
Receiver Positive or Negative
Threshold to STATUS LOW
(tSTSL)
20
µS
Figure 15
NOTE 2: C1 - C4 0.1µF, tested at 3.3V ±10%.
C1 = 0.047µF, C2-C4 = 0.33µF, tested at 5V±10%.
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
3
© Copyright 2006 Sipex Corporation
TIMING CHARACTERISTICS
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX.
Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25°C.
PARAMETER
MIN.
TYP.
SP3223E
120
23 5
SP3223EB
250
MAX.
UNITS
CONDITIONS
Maximum Data Rate
kbps
SP3223EH
460
SP3223EU
1000
RL = 3KΩ, CL = 1000pF, one driver active
RL = 3KΩ, CL = 250pF, one driver active
Receiver Propagation Delay
tPHL
0.15
µs
Receiver input to Receiver output, CL =
150pF
tPLH
Receiver Output Enable Time
200
ns
Normal operation
Receiver Output Disable Time
200
ns
Normal operation
ns
| tPHL - tPLH |, TAMB = 25ºC
ns
| tPHL - tPLH |
Driver Skew
E,EB
100
500
EH, EU
50
100
Receiver Skew
200
1000
Transition-Region Slew Rate
E,EB
30
EH
60
EU
90
Date: 10/06/06
V/µs
VCC= 3.3V, RL = 3KΩ, TAMB = 25ºC,
measurements taken from -3.0V to +3.0V
or +3.0V to -3.0V
SP3223 +3.0V to +5.5V RS-232 Transceivers
4
© Copyright 2006 Sipex Corporation
TYPICAL OPERATING CIRCUIT
+3V to +5V
C5
C1
+
+
19
VCC
0.1µF
2 C1+
V+
3
0.1µF
C3
+
0.1µF
4 C15 C2+
C2
+
SP3223
V-
7
C4
0.1µF
6 C2-
TTL/CMOS
INPUTS
13 T1IN
T1OUT
17
12 T2IN
T2OUT
8
R1IN
15 R1OUT
16
RS-232
INPUTS
R2IN
10 R2OUT
0.1µF
RS-232
OUTPUTS
5KΩ
TTL/CMOS
OUTPUTS
+
9
5KΩ
1 EN
VCC
20
14
11
To µP Supervisor
Circuit
SHUTDOWN
ONLINE
STATUS
GND
18
Figure 1. SP3223 Typical Operating Circuit
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
5
© Copyright 2006 Sipex Corporation
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 250Kbps data rate, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and TAMB = +25°C.
30
4
25
TxOUT +
Slew rate (V/µs)
Transmitter Output
Voltage (VDC)
6
2
0
-2
TxOUT -
-4
-6
15
10
1000
1 Transmitter at 250Kbps
1 Transmitter at 15.6Kbps
All drivers loaded 3K + Load Cap
5
0
0
- Slew
+ Slew
20
2000
3000
4000
5000
0
500
1000
Figure 2. Transmitter Output Voltage VS. Load
Capacitance for the SP3223EB
3000
4000
5000
Figure 3. Slew Rate VS. Load Capacitance for the
SP3223EB
35
20
25
Supply Current (mA)
30
I CC (mA)
2000
Load Capacitance (pF)
Load Capacitance (pF)
250Kbps
20
125Kbps
15
20Kbps
10
1 Transmitter at 250Kbps
1 Transmitter at 15.6Kbps
All drivers loaded 3K + Load Cap
5
0
0
1000
2000
3000
4000
15
10
0
5000
1 Transmitter at 250Kbps
2 Transmitters at 15.6Kbps
All drivers loaded with 3K // 1000pF
5
2.7
Load Capacitance (pF)
3
3.5
4
4.5
5
Supply Voltage (VDC)
Figure 5. Supply Current VS. Supply Voltage for
the SP3243EB
Figure 4. Supply Current VS. Load Capacitance when
Transmitting Data for the SP3223EB
6
Transmitter Output
Voltage (VDC)
TxOUT +
4
2
0
-2
-4
-6
TxOUT -
2.7
3
3.5
4
4.5
5
Supply Voltage (VDC)
Figure 6. Transmitter Output Voltage VS. Supply
Voltage for the SP3243EB
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
6
© Copyright 2006 Sipex Corporation
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 1000Kbps data rate, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and TAMB = +25°C.
6
Transmitter Output
Voltage (V)
200
Skew (ns)
150
100
T1 at 500Kbps
T2 at 31.2Kbps
All TX loaded 3K // CLoad
50
0
2
250
500
1000
1500
Load Capacitance (pF)
-2
-4
2000
2.7
3
3.5
4
Supply Voltage (V)
4.5
5
Figure 8 Transmitter Output Voltage VS. Supply
Voltage for the SP3223EU
Figure 7. Transmitter Skew VS. Load Capacitance for
the 3223EU
35
Supply Current (mA)
6
4
T1 at 1Mbps
T2 at 62.5Kbps
2
0
-2
-4
30
25
20
15
0
250
500
1000
Load Capacitance (pF)
5
0
1500
Figure 9. Transmitter Output Voltage VS. Load
Capacitance for the SP3223EU
T1 at 1Mbps
T2 at 62.5Kbps
10
-6
0
250
500
1000
Load Capacitance (pF)
1500
Figure 10. Supply Current VS. Load Capacitance for the
SP3223EU
6
Transmitter Output
Voltage (V)
20
SupplyCurrent (mA)
1Driver at 1Mbps
Other Drivers at 62.5Kbps
All Drivers Loaded with 3K // 250pF
0
-6
0
Transmitter
Output Voltage (V)
4
15
10
T1 at 1Mbps
T2 at 62.5Kbps
All Drivers loaded
with 3K//250pF
5
4
2
T1 at 1Mbps
T2 at 62.5Kbps
All Drivers loaded
with 3K//250pF
0
-2
-4
-6
0
2.7
3
3.5
4
Supply Voltage (V)
4.5
2.7
5
3.5
4
Supply Voltage (V)
4.5
5
Figure 12. Transmitter Output Voltage VS. Supply
Voltage for the SP3223EU
Figure 11. Supply Current VS. Supply Voltage for the
SP3223EU
Date: 10/06/06
3
SP3223 +3.0V to +5.5V RS-232 Transceivers
7
© Copyright 2006 Sipex Corporation
PIN DESCRIPTION
NAME
FUNCTION
PIN #
EN
Receiver Enable. Apply logic LOW for normal operation. Apply logic HIGH to
disable the receiver outputs (high-Z state).
1
C1+
Positive terminal of the voltage doubler charge-pump capacitor.
2
V+
Regulated +5.5V output generated by the charge pump.
3
C1-
Negative terminal of the voltage doubler charge-pump capacitor.
4
C2+
Positive terminal of the inverting charge-pump capacitor.
5
C2-
Negative terminal of the inverting charge-pump capacitor.
6
V-
Regulated -5.5V output generated by the charge pump.
7
T2OUT
RS-232 driver output.
8
R2IN
RS-232 receiver input.
9
TTL/CMOS receiver output.
10
TTL/CMOS Output indicating online and shutdown status.
11
T2IN
TTL/CMOS driver input.
12
T1IN
TTL/CMOS driver input.
13
ONLINE
Apply logic HIGH to override AUTO ON-LINE® circuitry keeping drivers active
(SHUTDOWN must also be logic HIGH, refer to Table 2).
14
R1OUT
TTL/CMOS receiver output.
15
R1IN
RS-232 receiver input.
16
T1OUT
RS-232 driver output.
17
Ground.
18
+3.0V to +5.5V supply voltage.
19
Apply logic LOW to shut down drivers and charge pump. This overrides all
AUTO ON-LINE® circuitry and ONLINE (refer to Table 2).
20
R2OUT
STATUS
GND
VCC
SHUTDOWN
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
8
© Copyright 2006 Sipex Corporation
DESCRIPTION
Otherwise, the system automatically comes
online. This feature allows design engineers to
address power saving concerns without major
design changes.
The SP3223 is a 2-driver/2-receiver device
ideal for portable or handheld applications.
The SP3223 transceivers meet the EIA/TIA-232
and ITU-T V.28/V.24 communication protocols
and can be implemented in battery-powered,
portable, or handheld applications such as notebook or handheld computers. The SP3223 devices feature Sipex's proprietary and patented
(U.S.-- 5,306,954) on-board charge pump circuitry that generates ±5.5V RS-232 voltage levels from a single +3.0V to +5.5V power supply.
The SP3223 devices operate at this typical data
rate when fully loaded.
THEORY OF OPERATION
The SP3223 series is made up of four basic
circuit blocks:
1. Drivers, 2. Receivers, 3. the Sipex proprietary
charge pump, and 4. AUTO ON-LINE® circuitry.
Drivers
The drivers are inverting level transmitters that
convert TTL or CMOS logic levels to 5.0V EIA/
TIA-232 levels with an inverted sense relative to
the input logic levels. Typically, the RS-232
output voltage swing is +5.4V with no load and
+5V minimum fully loaded. The driver outputs
are protected against infinite short-circuits to
ground without degradation in reliability. These
drivers comply with the EIA-TIA-232F and all
previous RS-232 versions. Unused driver inputs
should be connected to GND or VCC.
The SP3223 series is an ideal choice for power
sensitive designs. Featuring AUTO ON-LINE®
circuitry, the SP3223 reduces the power supply
drain to a 1µA supply current. In many portable
or handheld applications, an RS-232 cable can
be disconnected or a connected peripheral can be
turned off. Under these conditions, the internal
charge pump and the drivers will be shut down.
The drivers can guarantee output data rates fully
loaded with 3KΩ in parallel with 1000pF,
(SP3223EU, CL= 250pF) ensuring compatibility
with PC-to-PC communication software.
+3V to +5V
C5
C1
+
+
19
VCC
0.1µF
2 C1+
V+
3
0.1µF
C3
+
0.1µF
4 C15 C2+
C2
+
SP3223
V-
C4
0.1µF
6 C2-
+
The slew rate of the driver output on the E and EB
versions is internally limited to a maximum of
30V/µs in order to meet the EIA standards (EIA
RS-232D 2.1.7, Paragraph 5). The Slew Rate of
H and U versions is not limited to enable higher
speed data tranfers. The transition of the loaded
output from HIGH to LOW also meets the monotonicity requirements of the standard.
0.1µF
T1OUT 17
13 T1IN
TTL/CMOS
INPUTS 12 T2IN
T2OUT
15 R1OUT
UART
or
Serial µC
7
8
R1IN
16
R2IN
9
5KΩ
TTL/CMOS
OUTPUTS
10 R2OUT
RS-232
OUTPUTS
RS-232
INPUTS
5KΩ
1
VCC
20
14
11
EN
SHUTDOWN
Figure 12 shows a loopback test circuit used to
test the RS-232 Drivers. Figure 13 shows the test
results where one driver was active at 235Kbps
and all drivers are loaded with an RS-232 receiver in parallel with a 1000pF capacitor. RS232 data transmission rate of 120Kbps to 1Mbps.
provide compatibility with designs in personal
computer peripherals and LAN applications.
ONLINE
STATUS
GND
18
RESET
µP
Supervisor
IC
VIN
Figure 13. Interface Circuitry Controlled by Microprocessor Supervisory Circuit
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
9
© Copyright 2006 Sipex Corporation
+3V to +5V
C5
DEVICE: SP3223
C1
+
+
19
VCC
0.1µF
2 C1+
V+
3
0.1µF
C3
+
0.1µF
4 C1-
SHUTDOWN
EN
TXOUT
RXOUT
5 C2+
C2
0
0
High Z
+
0.1µF
SP3223
V-
7
C4
6 C2-
Active
T1IN
T1OUT
TXIN
TXOUT
+
0.1µF
TTL/CMOS
INPUTS
0
1
High Z
High Z
1
0
Active
Active
1
1
Active
R1IN
R1OUT
TTL/CMOS
OUTPUTS
5KΩ
High Z
RXIN
RXOUT
1
VCC
20
Table 2. SHUTDOWN and EN Truth Tables
Note: In AUTO ON-LINE® Mode where ONLINE =
GND and SHUTDOWN = VCC, the device will shut down
if there is no activity present at the Receiver inputs.
14
To µP Supervisor
Circuit
11
5KΩ
1000pF
EN
1000pF
SHUTDOWN
ONLINE
STATUS
GND
18
Receivers
Figure 14. Loopback Test Circuit for RS-232 Driver
Data Transmission Rates
The receivers convert ±5.0V EIA/TIA-232
levels to TTL or CMOS logic output levels.
Receivers have an inverting output that can be
disabled by using the EN pin.
Charge Pump
Receivers are active when the AUTO ON-LINE®
circuitry is enabled or when in shutdown.
During the shutdown, the receivers will continue
to be active. If there is no activity present at the
receivers for a period longer than 100µs or when
SHUTDOWN is enabled, the device goes into a
standby mode where the circuit draws 1µA.
Driving EN to a logic HIGH forces the outputs of
the receivers into high-impedance. The truth
table logic of the SP3223 driver and receiver
outputs can be found in Table 2.
The charge pump is a Sipex–patented design
(U.S. 5,306,954) and uses a unique approach
compared to older less–efficient designs. The
charge pump still requires four external
capacitors, but uses a four–phase voltage
shifting technique to attain symmetrical 5.5V
power supplies. The internal power supply
Since receiver input is usually from a transmission line where long cable lengths and system
interference can degrade the signal, the inputs
have a typical hysteresis margin of 300mV. This
ensures that the receiver is virtually immune to
noisy transmission lines. Should an input be left
unconnected, an internal 5KΩ pulldown resistor
to ground will commit the output of the receiver
to a HIGH state.
T1 IN
T1 OUT
R1 OUT
Figure 15. Loopback Test Circuit result at 235Kbps
(All Drivers Fully Loaded)
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
10
© Copyright 2006 Sipex Corporation
voltage is regulated to +5.5V. At this voltage,
the internal oscillator is disabled. Simultaneous
with the transfer of the voltage to C4, the
positive side of capacitor C1 is switched to VCC
and the negative side is connected to GND,
allowing the charge pump cycle to begin again.
The charge pump cycle will continue as long as
the operational conditions for the internal
oscillator are present.
consists of a regulated dual charge pump that
provides output voltages 5.5V regardless of the
input voltage (VCC) over the +3.0V to +5.5V
range. This is important to maintain compliant
RS-232 levels regardless of power supply
fluctuations.
The charge pump operates in a discontinuous
mode using an internal oscillator. If the output
voltages are less than a magnitude of 5.5V, the
charge pump is enabled. If the output voltages
exceed a magnitude of 5.5V, the charge pump is
disabled. This oscillator controls the four phases
of the voltage shifting. A description of each
phase follows.
Since both V+ and V– are separately generated
from VCC, in a no–load condition V+ and V– will
be symmetrical. Older charge pump approaches
that generate V– from V+ will show a decrease in
the magnitude of V– compared to V+ due to the
inherent inefficiencies in the design.
Phase 1
— VSS charge storage — During this phase of
the clock cycle, the positive side of capacitors
C1 and C2 are initially charged to VCC. Cl+ is
then switched to GND and the charge in C1– is
transferred to C2–. Since C2+ is connected to
VCC, the voltage potential across capacitor C2 is
now 2 times VCC.
AUTO ON-LINE® Circuitry
The SP3223 devices have a patent pending
AUTO ON-LINE® circuitry on board that saves
power in applications such as laptop computers,
PDA's, and other portable systems.
Phase 2
— VSS transfer — Phase two of the clock
connects the negative terminal of C2 to the VSS
storage capacitor and the positive terminal of C2
to GND. This transfers a negative generated
voltage to C 3. This generated voltage is
regulated to a minimum voltage of -5.5V.
Simultaneous with the transfer of the voltage to
C3, the positive side of capacitor C1 is switched
to VCC and the negative side is connected to
GND.
The SP3223 devices incorporate an AUTO
ON-LINE® circuit that automatically enables
itself when the external transmitters are enabled
and the cable is connected. Conversely, the
AUTO ON-LINE® circuit also disables most of
the internal circuitry when the device is not being
used and goes into a standby mode where the
device typically draws 1µA. This function can
also be externally controlled by the ONLINE
pin. When this pin is tied to a logic LOW, the
AUTO ON-LINE® function is active. Once
active, the device is enabled until there is no
activity on the receiver inputs. The receiver
input typically sees at least ±3V, which are
generated from the transmitters at the other end
of the cable with a ±5V minimum. When the
external transmitters are disabled or the cable is
disconnected, the receiver inputs will be pulled
down by their internal 5kΩ resistors to ground.
When this occurs over a period of time, the
internal transmitters will be disabled and the
device goes into a shutdown or standby mode.
When ONLINE is HIGH, the AUTO ON-LINE®
mode is disabled.
Phase 3
— VDD charge storage — The third phase of the
clock is identical to the first phase — the charge
transferred in C1 produces –VCC in the negative
terminal of C1, which is applied to the negative
side of capacitor C2. Since C2+ is at VCC, the
voltage potential across C2 is 2 times VCC.
Phase 4
— VDD transfer — The fourth phase of the clock
connects the negative terminal of C2 to GND,
and transfers this positive generated voltage
across C2 to C4, the VDD storage capacitor. This
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
11
© Copyright 2006 Sipex Corporation
or portable applications where the RS-232 cable
is disconnected or the RS-232 drivers of the
connected peripheral are turned off.
The AUTO ON-LINE® circuit has two stages:
1) Inactive Detection
2) Accumulated Delay
The AUTO ON-LINE® mode can be disabled
by the SHUTDOWN pin. If this pin is a logic
LOW, the AUTO ON-LINE® function will not
operate regardless of the logic state of the
ONLINE pin. Table 3 summarizes the logic of the
AUTO ON-LINE® operating modes. The truth
table logic of the SP3223 driver and receiver
outputs can be found in Table 2.
The first stage, shown in Figure 20, detects an
inactive input. A logic HIGH is asserted on
RXINACT if the cable is disconnected or the
external transmitters are disabled. Otherwise,
RXINACT will be at a logic LOW. This circuit
is duplicated for each of the other receivers.
The clock rate for the charge pump typically
operates at above 250kHz. The external capacitors can be as low as 0.1µF with a 16V breakdown voltage rating.
The STATUS pin outputs a logic LOW signal if
the device is shutdown. This pin goes to a logic
HIGH when the external transmitters are enabled and the cable is connected.
The second stage of the AUTO ON-LINE®
circuitry, shown in Figure 21, processes all the
receiver's RXINACT signals with an accumulated delay that disables the device to a 1µA
supply current.
The STATUS pin goes to a logic LOW when the
cable is disconnected, the external transmitters
are disabled, or the SHUTDOWN pin is
invoked. The typical accumulated delay is around
20µs.
When the SP3223 drivers or internal charge
pump are disabled, the supply current is reduced
to 1µA. This can commonly occur in handheld
When the SP3223 devices are shut down, the
charge pumps are turned off. V+ charge pump
output decays to VCC,the V- output decays to
GND. The decay time will depend on the size of
capacitors used for the charge pump. Once in
shutdown, the time required to exit the shut
down state and have valid V+ and V- levels is
typically 200µs.
For easy programming, the STATUS can be
used to indicate DTR or a Ring Indicator signal.
Tying ONLINE and SHUTDOWN
together will bypass the AUTO ON-LINE®
circuitry so this connection acts like a shutdown
input pin
S
H
U
T
RECEIVER +2.7V
0V
RS-232 INPUT
VOLTAGES -2.7V
D
O
W
N
VCC
STATUS
0V
tSTSL
tSTSH
tONLINE
+5V
DRIVER
RS-232 OUTPUT
VOLTAGES
0V
-5V
Figure 16. AUTO ON-LINE® Timing Waveforms
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
12
© Copyright 2006 Sipex Corporation
VCC = +5V
C4
+5V
+
C1
C2
–
–5V
+
–
–
+
VDD Storage Capacitor
+
–
VSS Storage Capacitor
C3
–5V
Figure 17. Charge Pump — Phase 1
VCC = +5V
C4
+
C1
C2
–
+
–
–
+
VDD Storage Capacitor
+
–
VSS Storage Capacitor
C3
–10V
Figure 18. Charge Pump — Phase 2
[
T
]
+6V
a) C2+
T
1
2
0V
2
0V
b) C2T
-6V
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 1.96V
Figure 19. Charge Pump Waveforms
VCC = +5V
C4
+5V
+
C1
+
C2
–
–5V
–
+
–
+
–
VDD Storage Capacitor
VSS Storage Capacitor
C3
–5V
Figure 20. Charge Pump — Phase 3
VCC = +5V
C4
+10V
C1
+
–
C2
+
–
–
+
+
–
VDD Storage Capacitor
VSS Storage Capacitor
C3
Figure 21. Charge Pump — Phase 4
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
13
© Copyright 2006 Sipex Corporation
RS-232 SIGNAL
AT RECEIVER
INPUT
SHUTDOWN
INPUT
ONLINE INPUT
STATUS OUTPUT
TRANSCEIVER
STATUS
YES
HIGH
LO W
HIGH
Normal Operation
(AUTO ON-LINE® )
NO
HIGH
HIGH
LO W
Normal Operation
NO
HIGH
LO W
LOW
Shutdown
(AUTO ON-LINE® )
YES
LOW
HIGH/LOW
HIGH
Shutdown
NO
LO W
HIGH/LOW
LOW
Shutdown
Table 3. AUTO ON-LINE® Logic
Inactive Detection Block
RXIN
RS-232
Receiver Block
RXINACT
RXOUT
Figure 22. Stage I of AUTO ON-LINE® Circuitry
Delay
Buffer
Delay
Buffer
STATUS
R1ON
R2ON
SHUTDOWN
Figure 23. Stage II of AUTO ON-LINE® Circuitry
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
14
© Copyright 2006 Sipex Corporation
The Sipex-patented charge pumps are designed
to operate reliably with a range of low cost
capacitors.Either polarized or non polarized
capacitors may be used. If polarized capacitors
are used they should be oriented as shown in the
Typical Operating Circuit. The V+ capacitor
may be connected to either ground or Vcc
(polarity reversed.)
ripple on the transmitter outputs and may slightly
reduce power consumption. C2, C3, and C4 can
be increased without changing C1’s value
For best charge pump efficiency locate the charge
pump and bypass capacitors as close as possible
to the IC. Surface mount capacitors are best for
this purpose. Using capacitors with lower
equivalent series resistance (ESR) and selfinductance, along with minimizing parasitic PCB
trace inductance will optimize charge pump
operation. Designers are also advised to consider
that capacitor values may shift over time and
operating temperature.
The charge pump operates with 0.1µF capacitors
for 3.3V operation. For other supply voltages,
see the table for required capacitor values. Do
not use values smaller than those listed.
Increasing the capacitor
values (e.g., by doubling in value) reduces
Minimum recommended charge pump capacitor value
Input Voltage VCC
Charge pump capacitor value for SP32XX
C1 – C4 = 0.1uF
3.0V to 3.6V
Date: 10/06/06
4.5V to 5.5V
C1 = 0.047uF, C2-C4 = 0.33uF
3.0V to 5.5V
C1 – C4 = 0.22uF
SP3223 +3.0V to +5.5V RS-232 Transceivers
15
© Copyright 2006 Sipex Corporation
normal usage. The transceiver IC receives most
of the ESD current when the ESD source is
applied to the connector pins. The test circuit for
IEC1000-4-2 is shown on Figure 23. There are
two methods within IEC1000-4-2, the Air
Discharge method and the Contact Discharge
method.
ESD TOLERANCE
The
SP3223E
series
incorporates
ruggedized ESD cells on all driver output and
receiver input pins. The ESD structure is
improved over our previous family for more
rugged applications and environments sensitive
to electro-static discharges and associated
transients. The improved ESD tolerance is at
least +15kV without damage nor latch-up.
With the Air Discharge Method, an ESD voltage
is applied to the equipment under test (EUT)
through air. This simulates an electrically charged
person ready to connect a cable onto the rear of
the system only to find an unpleasant zap just
before the person touches the back panel. The
high energy potential on the person discharges
through an arcing path to the rear panel of the
system before he or she even touches the system.
This energy, whether discharged directly or
through air, is predominantly a function of the
discharge current rather than the discharge
voltage. Variables with an air discharge such as
approach speed of the object carrying the ESD
potential to the system and humidity will tend to
change the discharge current. For example, the
rise time of the discharge current varies with the
approach speed.
There are different methods of ESD testing
applied:
a) MIL-STD-883, Method 3015.7
b) IEC1000-4-2 Air-Discharge
c) IEC1000-4-2 Direct Contact
The Human Body Model has been the generally
accepted ESD testing method for semiconductors.
This method is also specified in MIL-STD-883,
Method 3015.7 for ESD testing. The premise of
this ESD test is to simulate the human body’s
potential to store electro-static energy and
discharge it to an integrated circuit. The
simulation is performed by using a test model as
shown in Figure 22. This method will test the
IC’s capability to withstand an ESD transient
during normal handling such as in manufacturing
areas where the ICs tend to be handled frequently.
The Contact Discharge Method applies the ESD
current directly to the EUT. This method was
devised to reduce the unpredictability of the
ESD arc. The discharge current rise time is
constant since the energy is directly transferred
without the air-gap arc. In situations such as
hand held systems, the ESD charge can be directly
discharged to the equipment from a person already
holding the equipment. The current is transferred
on to the keypad or the serial port of the equipment
directly and then travels through the PCB and finally
to the IC.
The IEC-1000-4-2, formerly IEC801-2, is
generally used for testing ESD on equipment and
systems. For system manufacturers, they must
guarantee a certain amount of ESD protection
since the system itself is exposed to the outside
environment and human presence. The premise
with IEC1000-4-2 is that the system is required
to withstand an amount of static electricity when
ESD is applied to points and surfaces of the
equipment that are accessible to personnel during
RSS
RC
C
SW2
SW1
CSS
DC Power
Source
Device
Under
Test
Figure 24. ESD Test Circuit for Human Body Model
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
16
© Copyright 2006 Sipex Corporation
Contact-Discharge Module
R
RSS
R
RC
C
RV
SW2
SW1
Device
Under
Test
CSS
DC Power
Source
RS and RV add up to 330Ω for IEC1000-4-2.
Figure 25. ESD Test Circuit for IEC1000-4-2
i➙
The circuit model in Figures 22 and 23 represent
the typical ESD testing circuit used for all three
methods. The CS is initially charged with the DC
power supply when the first switch (SW1) is on.
Now that the capacitor is charged, the second
switch (SW2) is on while SW1 switches off. The
voltage stored in the capacitor is then applied
through RS, the current limiting resistor, onto the
device under test (DUT). In ESD tests, the SW2
switch is pulsed so that the device under test
receives a duration of voltage.
30A
15A
0A
For the Human Body Model, the current limiting
resistor (RS) and the source capacitor (CS) are
1.5kΩ an 100pF, respectively. For IEC-1000-42, the current limiting resistor (RS) and the source
capacitor (CS) are 330Ω an 150pF, respectively.
t=0ns
t=30ns
t➙
Figure 26. ESD Test Waveform for IEC1000-4-2
The higher CS value and lower RS value in the
IEC1000-4-2 model are more stringent than the
Human Body Model. The larger storage capacitor
injects a higher voltage to the test point when
SW2 is switched on. The lower current limiting
resistor increases the current charge onto the test
point.
DEVICE PIN
TESTED
HUMAN BODY
MODEL
Air Discharge
Driver Outputs
Receiver Inputs
±15kV
±15kV
±15kV
±15kV
IEC1000-4-2
Direct Contact
±8kV
±8kV
Level
4
4
Table 4. Transceiver ESD Tolerance Levels
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
17
© Copyright 2006 Sipex Corporation
20 Pin PDIP
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
18
© Copyright 2006 Sipex Corporation
20 PIN TSSOP
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2006 Sipex Corporation
20 PIN SSOP
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2006 Sipex Corporation
PRODUCT NOMENCLATURE
SP 3223 E U EY L /TR
Tape and Reel options
Sipex
“L” suffix indicates Lead Free packaging
Package Type
Part Number
A= SSOP
P=PDIP
Y=TSSOP
Temperature Range
Speed Indicator
ESD Rating
Date: 10/06/06
Blank= 120Kbps
B= 250Kbps
H= 450Kbps
U= 1Mbps
E= 15kV HBM and IEC 1000-4
SP3223 +3.0V to +5.5V RS-232 Transceivers
21
C= Commercial Range 0ºc to 70ºC
E= Extended Range -40ºc to 85ºC
© Copyright 2006 Sipex Corporation
ORDERING INFORMATION
Part Number
Temperature Range
Package Types
SP3223EBCP .................................................... 0°C to +70°C -------------------------------------------- 20-pin PDIP
SP3223EBCA .................................................... 0°C to +70°C ------------------------------------------- 20-pin SSOP
SP3223EBCA/TR .............................................. 0°C to +70°C ------------------------------------------- 20-pin SSOP
SP3223EBCY .................................................... 0°C to +70°C ----------------------------------------- 20-pin TSSOP
SP3223EBCY/TR .............................................. 0°C to +70°C ----------------------------------------- 20-pin TSSOP
SP3223EBEP .................................................. -40°C to +85°C ------------------------------------------- 20-pin PDIP
SP3223EBEA .................................................. -40°C to +85°C ------------------------------------------ 20-pin SSOP
SP3223EBEA/TR ............................................ -40°C to +85°C ------------------------------------------ 20-pin SSOP
SP3223EBEY .................................................. -40°C to +85°C ---------------------------------------- 20-pin TSSOP
SP3223EBEY/TR ............................................ -40°C to +85°C ---------------------------------------- 20-pin TSSOP
SP3223ECA ...................................................... 0°C to +70°C .................................................... 20-pin SSOP
SP3223ECA/TR ................................................ 0°C to +70°C .................................................... 20-pin SSOP
SP3223ECP ...................................................... 0°C to +70°C ...................................................... 20-pin PDIP
SP3223ECY ...................................................... 0°C to +70°C .................................................. 20-pin TSSOP
SP3223ECY/TR ................................................ 0°C to +70°C .................................................. 20-pin TSSOP
SP3223EEA .....................................................
SP3223EEA/TR ...............................................
SP3223EEP .....................................................
SP3223EEY .....................................................
SP3223EEY/TR ...............................................
-40°C to +85°C .................................................. 20-pin SSOP
-40°C to +85°C .................................................. 20-pin SSOP
-40°C to +85°C .................................................... 20-pin PDIP
-40°C to +85°C ................................................ 20-pin TSSOP
-40°C to +85°C ................................................ 20-pin TSSOP
SP3223EUCP .................................................... 0°C to +70°C ...................................................... 20-pin PDIP
SP3223EUCA .................................................... 0°C to +70°C .................................................... 20-pin SSOP
SP3223EUCA/TR .............................................. 0°C to +70°C .................................................... 20-pin SSOP
SP3223EUCY .................................................... 0°C to +70°C .................................................. 20-pin TSSOP
SP3223EUCY/TR .............................................. 0°C to +70°C .................................................. 20-pin TSSOP
SP3223EUEP ..................................................
SP3223EUEA ..................................................
SP3223EUEA/TR ............................................
SP3223EUEY ..................................................
SP3223EUEY/TR ............................................
-40°C to +85°C .................................................... 20-pin PDIP
-40°C to +85°C .................................................. 20-pin SSOP
-40°C to +85°C .................................................. 20-pin SSOP
-40°C to +85°C ................................................ 20-pin TSSOP
-40°C to +85°C ................................................ 20-pin TSSOP
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SP3223EUEY/TR = standard; SP3223EUEY-L/TR = lead free
/TR = Tape and Reel
Pack quantity is 1,500 for SSOP, TSSOP and WSOIC.
CLICK HERE TO ORDER SAMPLES
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
22
© Copyright 2006 Sipex Corporation
orDerinG inForMATion
Contact factory for availability of the following legacy part numbers. For long term availability
Sipex recommends upgrades as listed below. All upgrade part numbers shown are fully pinout
and function compatible with legacy part numbers. Upgrade part numbers may contain
feature and/or performance enhancements or other changes to datasheet parameters.
Legacy Part Number
SP3223BCA
SP3223BCA/TR
SP3223BCA-L
SP3223BCA-L/TR
SP3223BCP
SP3223BCY
SP3223BCY/TR
SP3223BCY-L
SP3223BCY-L/TR
SP3223BEA
SP3223BEA/TR
SP3223BEA-L
SP3223BEA-L/TR
SP3223BEP
SP3223BEY
SP3223BEY/TR
SP3223BEY-L
SP3223BEY-L/TR
SP3223CA
SP3223CA/TR
SP3223CA-L
SP3223CA-L/TR
SP3223CP
SP3223CY
SP3223CY/TR
SP3223CY-L
SP3223CY-L/TR
SP3223EA
SP3223EA/TR
SP3223EA-L
SP3223EA-L/TR
SP3223EHCA
SP3223EHCA/TR
SP3223EHCA-L
SP3223EHCA-L/TR
SP3223EHCP
Recommended Upgrade
SP3223EBCA
SP3223EBCA/TR
SP3223EBCA-L
SP3223EBCA-L/TR
SP3223EBCP
SP3223EBCY
SP3223EBCY/TR
SP3223EBCY-L
SP3223EBCY-L/TR
SP3223EBEA
SP3223EBEA/TR
SP3223EBEA-L
SP3223EBEA-L/TR
SP3223EBEP
SP3223EBEY
SP3223EBEY/TR
SP3223EBEY-L
SP3223EBEY-L/TR
SP3223ECA
SP3223ECA/TR
SP3223ECA-L
SP3223ECA-L/TR
SP3223ECP
SP3223ECY
SP3223ECY/TR
SP3223ECY-L
SP3223ECY-L/TR
SP3223EEA
SP3223EEA/TR
SP3223EEA-L
SP3223EEA-L/TR
SP3223EUCA
SP3223EUCA/TR
SP3223EUCA-L
SP3223EUCA-L/TR
SP3223EUCP
Legacy Part Number
SP3223EHCY
SP3223EHCY/TR
SP3223EHCY-L
SP3223EHCY-L/TR
SP3223EP
SP3223EY
SP3223EY/TR
SP3223EY-L
SP3223EY-L/TR
SP3223HCA
SP3223HCA/TR
SP3223HCA-L
SP3223HCA-L/TR
SP3223HCP
SP3223HCY
SP3223HCY/TR
SP3223HCY-L
SP3223HCY-L/TR
SP3223UCA
SP3223UCA/TR
SP3223UCA-L
SP3223UCA-L/TR
SP3223UCP
SP3223UCY
SP3223UCY/TR
SP3223UCY-L
SP3223UCY-L/TR
SP3223UEA
SP3223UEA/TR
SP3223UEA-L
SP3223UEA-L/TR
SP3223UEP
SP3223UEY
SP3223UEY/TR
SP3223UEY-L
SP3223UEY-L/TR
Recommended Upgrade
SP3223EUCY
SP3223EUCY/TR
SP3223EUCY-L
SP3223EUCY-L/TR
SP3223EEP
SP3223EEY
SP3223EEY/TR
SP3223EEY-L
SP3223EEY-L/TR
SP3223EUCA
SP3223EUCA/TR
SP3223EUCA-L
SP3223EUCA-L/TR
SP3223EUCP
SP3223EUCY
SP3223EUCY/TR
SP3223EUCY-L
SP3223EUCY-L/TR
SP3223EUCA
SP3223EUCA/TR
SP3223EUCA-L
SP3223EUCA-L/TR
SP3223EUCP
SP3223EUCY
SP3223EUCY/TR
SP3223EUCY-L
SP3223EUCY-L/TR
SP3223EUEA
SP3223EUEA/TR
SP3223EUEA-L
SP3223EUEA-L/TR
SP3223EUEP
SP3223EUEY
SP3223EUEY/TR
SP3223EUEY-L
SP3223EUEY-L/TR
Sipex Corporation
Headquarters and
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
neither does
it convey
any
license
under
its patent
norarising
the rights
of the
others.
Sipex Corporation
reserves
the right
to make
changeshereing;
to any products
described
herein.
Sipex
does
not assume
anyrights
liability
out of
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Date:
Date:08/25/05
08/28/05
SP3223
+3.0V
to +5.5V
RS-232 Transceivers
SP3223 +3.0V
to +5.5V
RS-232
Transceivers
23
23
© Copyright 2005 Sipex Corporation