®
SP3220B/U
High Speed +3.0V to +5.5V RS-232 Driver/Receiver Pair
■
Meets True RS-232 Protocol Operation
From A +3.0V to +5.5V Power Supply
■
Minimum 250 Kbps Data Rate
(SP3220B) or 1Mbps Data Rate
(SP3220U) under Fully Load
■
1µA Low-Power Shutdown With
Receivers Active
■
Interoperable With EIA/TIA - 232 and
adheres to EIA/TIA - 562 Down to
+2.7V Power Source
■
Pin-Compatible With The
MAX3221E
Device Without
The
AUTO ON-LINE
®
Feature
■
ESD Specifications:
+2kV Human Body Model
DESCRIPTION
The
SP3220B/U
device is an RS-232 driver/receiver solution intended for portable or hand-held
applications such as notebook or palmtop computers. The
SP3220B/U
device has a high-
efficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V operation. This
charge pump allows the
SP3220B/U
device to deliver true RS-232 performance from a single
power supply ranging from +3.3V to +5.0V.
The
SP3220B/U
device has a low-power shutdown mode where the driver outputs and charge
pumps are disabled. During shutdown, the supply current falls to less than 1µA.
V
CC
+
15
V
CC
2 C1+
0.1µF
4 C1-
5 C2+
C2
+
0.1µF
6 C2-
11 T1IN
9 R1OUT
5kΩ
1 EN
GND
14
*can be returned to
either V
CC
or GND
SHDN
16
T1OUT
R1IN
13
8
V+
3
*C3
+
0.1µF
C5
0.1µF
C1
+
SP3220B/U
V-
7
C4
+
0.1µF
LOGIC
INPUTS
LOGIC
OUTPUTS
RS-232
OUTPUTS
RS-232
INPUTS
Rev. 7/8/03
SP3220B/U +3.0 to +5.0V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
1
SP
32
20
B/U
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+ (NOTE 1)..............................................-0.3V to +7.0V
V- (NOTE 1).............................................+0.3V to -7.0V
V+ + |V-| (NOTE 1)...................................................+13V
I
CC
(DC V
CC
or GND current)..........................+100mA
Input Voltages
TxIN, EN .............................................. -0.3V to +6.0V
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
16-pin SSOP (derate 9.69mW/
o
Cabove+70
o
C) ........ 775mW
16-pin TSSOP (derate 10.5mW/
o
C above +70
o
C) ..... 840mW
16-pin Wide SOIC (derate 11.2mW/
o
C above+70
o
C) 900mW
NOTE 1:
V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
SPECIFICATIONS
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.0V with T
AMB
= T
MIN
to T
MAX
.
Typical Values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25
o
C, C1-4=0.1µF.
PARAMETER
DC CHARACTERISTICS
Supply Current
Shutdown Supply Current
0.3
1.0
1.0
10
mA
µA
no load, T
AMB
= +25
o
C, V
CC
= 3.3V
TxIN = GND or V
CC
SHDN = GND, T
AMB
= +25
o
C, V
CC
= +3.3V
TxIN = 0V or V
CC
MIN.
TYP.
MAX.
UNITS
CONDITIONS
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold LOW
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
3k
Ω
load to ground at all driver outputs,
T
AMB
= +25
o
C
V
CC
= V+ = V- = 0V, T
OUT
= +2V
V
OUT
= 0V
V
OUT
= +12V,V
CC
= 0V to 5.5V,drivers disabled
V
CC
-0.6
V
CC
-0.1
2.0
±0.01
±0.05
±1.0
±10
0.4
0.8
V
V
µA
µA
V
V
TxIN, EN, SHDN, Note 2
V
CC
= 3.3V, Note 2 or 5.0V, Note 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
Rev. 7/8/03
SP3220B/U +3.0 to +5.0V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
2
SPECIFICATIONS (continued)
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.0V with T
AMB
= T
MIN
to T
MAX
.
Typical Values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25
o
C, C1-4=0.1µF.
PARAMETER
RECEIVER INPUTS
Input Voltage Range
Input Threshold LOW
Input Threshold HIGH
Input Hysteresis
Input Resistance
TIMING CHARACTERISTICS
Maximum Data Rate
Maximum Data Rate
Receiverr Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew
Receiver Skew
Transition-Region Slew Rate
250
1000
0.15
0.15
200
200
100
50
30
Kbps
Kbps
µs
µs
ns
ns
ns
ns
V/
µs
| t
PHL
- t
PLH
|, T
AMB
= 25
o
C
| t
PHL
- t
PLH
|
V
CC
= 3.3V, R
L
= 3K
Ω
, T
AMB
= 25
o
C,
measurements taken from -3.0V to +3.0V
or +3.0V to -3.0V (SP3220EB)
(SP3220EU)
R
L
=3k
Ω
, C
L
=1000pF (SP3220EB)
R
L
=3k
Ω
, C
L
= 250pF (SP3220EU)
t
PHL
, RxIN to RxOUT, C
L
= 150pF
t
PHL
, RxIN to RxOUT, C
L
= 150pF
3
-25
0.6
0.8
1.2
1.5
1.5
1.8
0.3
5
7
2.4
2.4
+25
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
90
NOTE 2:
Driver input hysteresis is typically 250mV.
V/
µs
Rev. 7/8/03
SP3220B/U +3.0 to +5.0V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 250kbps data rates, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
30
Transmitter Output
Voltage (V)
6
T1 at Full Data Rate
T2 at 1/16 Full Data Rate
T1+T2 Loaded with 3k/CLoad
25
Icc (mA)
125Kbps
4
2
0
-2
-4
-6
0
1000
T1 at 250Kbps
TxOUT +
20
60Kbps
15
10
5
0
0
1000
2000
3000
4000
5000
Load Capacitance (pF)
20Kbps
TxOUT -
2000
3000
4000
5000
Load Capacitance (pF)
Figure 1. I
CC
vs Load Capacitance for the SP3220B.
Figure 2. Transmiter Output Voltage vs Load Capacitance
for the SP3220B..
6
12
TxOUT +
Transmitter Output
Voltage (V)
Supply Current (mA)
4
2
0
-2
-4
TxOUT -
10
8
6
4
2
0
2.7
T1 Loaded with 3K // 1000pf @ 250Kbps
-6
2.7
3
3.5
4
Supply Voltage (V)
4.5
5
3
3.5
4
4.5
5
Supply Voltage (V)
Figure 3. Transmitter Output Voltage vs Supply Voltage
for the SP3220B.
Figure 4. Supply Current vs Supply Voltage for the
SP3220B.
25
Slew rate (V/µs)
20
15
10
5
0
0
500
1000
2000
3000
4000
5000
- Slew
+ Slew
40
1Mbps
30
2Mbps
500Kbps
Icc (mA)
20
10
0
0
250
500
1000
2000
3000
4000
Load Capacitance (pF)
Load Capacitance (pF)
Figure 5. Slew Rate vs Load Capacitance for the
SP3220B.
Figure 4. Supply Current vs Supply Voltage for the
SP3220U.
Rev. 7/8/03
SP3220B/U +3.0 to +5.0V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 250kbps data rates, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
6
6
4
Transmitter
Output Voltage (V)
2Mbps
1.5Mbps
1Mbps
TxOUT +
4
2
0
-2
-4
-6
2Mbps
1.5Mbps
1Mbps
Transmitter Output
Voltage (V)
2
0
-2
-4
TxOUT -
-6
2.5
0
250
500
1000
1500
2000
Load Capacitance (pF)
2.7
3
3.5
4
Supply Voltage (V)
4.5
5
Figure 7. Transmitter Output Voltage vs Load Capaci-
tance for the SP3220U.
Figure 8. Transmiter Output Voltage vs Supply Voltage
for the SP3220U.
16
Supply Current (mA)
14
12
10
8
6
4
T1 Loaded with 3K // 1000pf @1Mbps
2
0
2.7
3
3.5
4
4.5
5
Supply Voltage (V)
Figure 9. Supply Current vs Supply Voltage for the
SP3220U.
Rev. 7/8/03
SP3220B/U +3.0 to +5.0V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
5
Electronics Design Contest
京公网安备 11010802033920号
EEWORLD
