SP3222E / SP3232E
True 3.0V to 5.5V RS-232 Transceivers
Description
The
SP3222E
and
SP3232E
series are RS-232 transceiver solutions
intended for portable or hand-held applications such as notebook
or palmtop computers. The SP3222E / SP3232E series has a high-
efficiency, charge-pump power supply that requires only 0.1µF
capacitors in 3.3V operation. This charge pump allows the SP3222E
/ SP3232E series to deliver true RS-232 performance from a single
power supply ranging from 3.0V to 5.5V. The SP3222E / SP3232E
are 2-driver / 2-receiver devices. This series is ideal for portable or
hand-held applications such as notebook or palmtop computers. The
ESD tolerance of the SP3222E / SP3232E devices are over ±15kV
for both Human Body Model and IEC61000-4-2 Air discharge test
methods. The SP3222E device has a low-power shutdown mode
where the devices’ driver outputs and charge pumps are disabled.
During shutdown, the supply current falls to less than 1µA.
FEATURES
■
Meets true EIA/TIA-232-F standards from
a 3.0V to 5.5V power supply
■
Minimum 120kbps data rate under full load
■
1μA low power shutdown with receivers
active (SP3222E)
■
Interoperable with RS-232 down to a 2.7V
power source
■
Enhanced ESD specifications:
■
±15kV Human Body Model
■
±15kV IEC61000-4-2 Air Discharge
■
±8kV IEC61000-4-2 Contact
Discharge
Ordering Information -
Page 21
Typical Applications
V
CC
+
+
19
V
CC
V+
+
+
0.1µF
2 C1+
0.1µF
4 C1-
5 C2+
0.1µF
6 C2-
12 T1IN
11 T2IN
V
CC
17
V
CC
V+
C5
C1
0.1µF
2 C1+
0.1µ F
4 C1-
5 C2+
0.1µF
6 C2-
13 T1IN
12 T2IN
C5
3
*C3
7
C4
T1OUT
T2OUT
17
8
+
0.1µF
C2
+
0.1µF
C1
3
*C3
7
C4
+
0.1µF
C2
+
SP3222E
SSOP
TSSOP
V-
+
SP3222E
SOIC
V-
+
0.1µF
LOGIC
INPUTS
RS-232
OUTPUTS
LOGIC
INPUTS
T1OUT
T2OUT
15
8
RS-232
OUTPUTS
15 R1OUT
LOGIC
OUTPUTS
5kΩ
10 R2OUT
5kΩ
1 EN
GND
18
R1IN
16
RS-232
INPUTS
LOGIC
OUTPUTS
13 R1OUT
5kΩ
10 R2OUT
5kΩ
1 EN
GND
R1IN
R2IN
14
RS-232
INPUTS
R2IN
9
20
9
18
SHDN
V
CC
+
+
16
V+
2
*C3
6
C4
T1OUT
T2OUT
14
7
+
0.1µF
+
SHDN
*can be returned to
either V
CC
or GND
C5
C1
0.1µF
1 C1+
0.1µF
3 C1-
4 C2+
0.1µF
5 C2-
11 T1IN
10 T2IN
V
CC
16
*can be returned to
either V
CC
or GND
0.1µF
C2
+
SP3232E
V-
LOGIC
INPUTS
RS-232
OUTPUTS
12 R1OUT
LOGIC
OUTPUTS
5kΩ
9 R2OUT
5kΩ
R1IN
13
RS-232
INPUTS
R2IN
8
GND
15
*can be returned to
either V
CC
or GND
REV 1.0.3
1/21
SP3222E / SP3232E
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.
V
CC
..................................................................-0.3V to 6.0V
V+
(1)
.................................................................-0.3V to 7.0V
V-
(1)
..................................................................0.3V to -7.0V
V+ + |V-|
(1)
.......................................................................13V
I
CC
(DC V
CC
or GND current).................................±100mA
Input Voltages
TxIN, EN, SHDN.................................-0.3V to (V
CC
+ 0.3V)
RxIN.............................................................................±25V
Output Voltages
TxOUT......................................................................±13.2V
RxOUT...............................................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration
TxOUT................................................................Continuous
Storage Temperature.................. ...............-65˚C to +150˚C
Power Dissipation per package
20-pin SSOP (derate 9.25mW/°C above 70°C).......750mW
18-pin SOIC (derate 15.7mW/°C above 70°C).......1260mW
20-pin TSSOP (derate 11.1mW/°C above 70°C).....890mW
16-pin SSOP (derate 9.69mW/°C above 70°C).......775mW
16-pin PDIP (derate 14.3mW/°C above 70°C).......1150mW
16-pin WSOIC (derate 11.2mW/°C above 70°C).....900mW
16-pin TSSOP (derate 10.5mW/°C above 70°C).....850mW
16-pin NSOIC (derate 13.57mW/°C above 70°C)..1086mW
NOTE:
1. V+ and V- can have
maximum magnitudes of 7V, but their absolute differ-
ence cannot exceed 13V.
Electrical Characteristics
Unless otherwise noted, the following specifications apply for V
CC
= 3.0V to 5.5V with T
AMB
= T
MIN
to T
MAX
, typical values
apply at V
CC
= 3.3V or 5.0V and T
AMB
= 25°C.
PARAMETERS
DC Characteristics
Supply current
Shutdown supply current
Logic Inputs and Receiver Outputs
Input logic threshold LOW
Input logic threshold HIGH
Input logic threshold HIGH
Input leakage current
Output leakage current
Output voltage LOW
Output voltage HIGH
Driver Outputs
Output voltage swing
Output resistance
Output short-circuit current
Output leakage current
+5.0
300
+35
+60
+25
+5.4
V
Ω
mA
µA
All driver outputs loaded with 3kΩ to GND,
T
AMB
= 25
o
C
V
CC
= V+ = V- = 0V, T
OUT
= +2V
V
OUT
= 0V
V
CC
= 0V or 3.0V to 5.5V,
V
OUT
= +12V, drivers disabled
V
CC
- 0.6
V
CC
- 0.1
2.0
2.4
+0.01
+0.05
0.8
V
CC
V
CC
+1.0
+10
0.4
V
V
V
µA
µA
V
V
TxIN, EN, SHDN
(2)
V
CC
= 3.3V
(2)
V
CC
= 5.0V
(2)
TxIN, EN, SHDN,
T
AMB
= 25
o
C, V
IN
= 0V to V
CC
Receivers disabled, V
OUT
= 0V to V
CC
I
OUT
= 1.6mA
I
OUT
= -1.0mA
0.3
1.0
1.0
10
mA
µA
no load, V
CC
= 3.3V,
T
AMB
= 25
o
C, TxIN = GND or V
CC
SHDN = GND, V
CC
= 3.3V,
T
AMB
= 25
o
C, TxIN = Vcc or GND
MIN.
TYP.
MAX.
UNITS
CONDITIONS
REV 1.0.3
2/21
SP3222E / SP3232E
Electrical Characteristics (Continued)
Unless otherwise noted, the following specifications apply for V
CC
= 3.0V to 5.5V with T
AMB
= T
MIN
to T
MAX
, typical values
apply at V
CC
= 3.3V or 5.0V and T
AMB
= 25°C.
PARAMETERS
Receiver Inputs
Input voltage range
Input threshold LOW
Input threshold LOW
Input threshold HIGH
Input threshold HIGH
Input hysteresis
Input resistance
Timing Characteristics
Maximum data rate
Driver propagation delay, t
PHL
Driver propagation delay, t
PLH
Receiver propagation delay, t
PHL
Receiver propagation delay, t
PLH
Receiver output enable time
Receiver output disable time
Driver skew
Receiver skew
Transition-region slew rate
120
235
1.0
1.0
0.3
0.3
200
200
100
200
500
1000
30
kbps
µs
µs
µs
µs
ns
ns
ns
ns
V/µs
| t
PHL
- t
PLH
|, T
AMB
= 25°C
| t
PHL
- t
PLH
|
V
CC
= 3.3V, R
L
= 3kΩ, C
L
= 1000pF,
T
AMB
= 25°C, measurements taken from
-3.0V to 3.0V or 3.0V to -3.0V
R
L
= 3kΩ, C
L
= 1000pF, one driver switching
R
L
= 3kΩ, C
L
= 1000pF
R
L
= 3kΩ, C
L
= 1000pF
Receiver input to receiver output, C
L
= 150pF
Receiver input to receiver output, C
L
= 150pF
3
-15
0.6
0.8
1.2
1.5
1.5
1.8
0.3
5
7
2.4
2.4
15
V
V
V
V
V
V
kΩ
V
CC
= 3.3V
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 5.0V
MIN.
TYP.
MAX.
UNITS
CONDITIONS
NOTE:
2.
Driver input hysteresis is typically 250mV.
REV 1.0.3
3/21
SP3222E / SP3232E
Typical Performance Characteristics
Unless otherwise noted, the following performance characteristics apply for V
CC
= 3.3V, 120kbps data rate, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and T
AMB
= 25°C.
6
Transmitter Output Voltage [V]
4
Slew Rate [V /µs ]
14
12
10
8
6
4
2
0
2
0
0
-2
-4
-6
500
1000
1500
2000
Vout+
Vout-
+Slew
-Slew
Load Capacitance [pF]
0
500
1000
1500
Load Capacitance [pF]
2000
2330
Figure 1: Transmitter Output Voltage vs Load Capacitance
for the SP3222E and SP3232E
Figure 2: Slew Rate vs Load Capacitance
for the SP3222E and SP3232E
50
45
40
35
30
25
20
15
10
5
0
118KHz
60KHz
10KHz
Suppl y Current [mA]
0
500
1000
1500
2000
2330
Load Capacitance [pF]
Figure 3: Supply Current VS. Load Capacitance
when Transmitting Data
REV 1.0.3
4/21
SP3222E / SP3232E
Pin Functions
Pin Number
Pin Name
Pin Function / Description
SP3222E
SOIC
EN
C1+
V+
C1-
C2+
C2-
V-
T
1
OUT
T
2
OUT
R
1
IN
R
2
IN
R
1
OUT
R
2
OUT
T
1
IN
T
2
IN
GND
V
CC
SHDN
N.C.
Receiver Enable. Apply logic LOW for normal operation.
Apply logic HIGH to disable the receiver outputs (high-Z state).
Positive terminal of the voltage doubler charge-pump capacitor
5.5V output generated by the charge pump
Negative terminal of the voltage doubler charge-pump capacitor
Positive terminal of the inverting charge-pump capacitor
Negative terminal of the inverting charge-pump capacitor
-5.5V output generated by the charge pump
RS-232 driver output
RS-232 driver output
RS-232 receiver input
RS-232 receiver input
TTL/CMOS receiver output
TTL/CMOS receiver output
TTL/CMOS driver input
TTL/CMOS driver input
Ground
3.0V to 5.5V supply voltage
Shutdown Control Input. Drive HIGH for normal device operation.
Drive LOW to shutdown the drivers (high-Z output) and the on-board power supply.
No connect
1
2
3
4
5
6
7
15
8
14
9
13
10
12
11
16
17
18
-
SSOP
TSSOP
1
2
3
4
5
6
7
17
8
16
9
15
10
13
12
18
19
20
11, 14
SP3232E
-
1
2
3
4
5
6
14
7
13
8
12
9
11
10
15
16
-
-
Table 1: Device Pin Description
REV 1.0.3
5/21
电源技术
