SP3224E-SP3227E
3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus
FEATURES
■ 15kV ESD protected RS-232 I/O pins
■ Auto On-line
®
Plus automatic power saving mode
■ Meets true EIA/TIA-232-F standards from +3.0V to
+5.5V power supply.
■ Adheres to EIA/TIA-562 for interoperability with
EIA/TIA-232 down to a +2.7V supply voltage
■ Regulated charge pump yields stable
RS-232 outputs
■ Drop-in replacement to MAX3224, ICL3224,
MAX3225, ICL3225, MAX3226, ICL3226,
MAX3227 and ICL3227
■ SP3224E and SP3226E reduced EMI with a slew
rate controlled 250kbps data rate
■ SP3225E and SP3227E- high speed data rate of
1 Mbps.
■ Available in RoHS compliant, Lead Free
Packaging
READY
1
C1+
2
V+
C1-
3
4
20
SHUTDOWN
19
V
CC
18
GND
T
1
OUT
R
1
IN
R
1
OUT
ONLINE
17
SP3224E 16
C2+
5
SP3225E
15
C2-
6
14
V-
7
8
R
2
IN
9
R
2
OUT
10
T
2
OUT
13
T
1
IN
12
T
2
IN
11
STATUS
All devices feature 3.0V to 5.5V power supply, 4 small charge pump capacitors, and 15kV ESD
protection.
Device
SP3224E
SP3225E
SP3226E
SP3227E
Data Rate (bps)
250k
1M
250k
1M
No. of
Drivers/Receivers
2/2
2/2
1/1
1/1
READY pin
Yes
Yes
Yes
Yes
Low-Power Shutdown
Auto On-Line
®
Plus
Auto On-Line
®
Plus
Auto On-Line
®
Plus
Auto On-Line
®
Plus
TyPICAL APPLICATIONS
■ Diagnostic/Serial ports on
embedded applications
■ Handheld Test Equipment
■ PC related Peripherals and
Equipment
■ Battery Powered Equipment
■ Point-of-sale Equipment
■ Set-top Box
DESCRIPTION
The SP3224E/3225E are 2-driver/2-receiver devices and the SP3226E/SP3227E are 1-
driver/1-receiver devices. All are ideal for computer peripherals, point-of-sale equipment,
consumer and embedded applications. These devices use an internal high-efficiency,
charge-pump power supply that requires only 0.1μF capacitors in 3.3V operation. This
charge pump and Exar’s driver architecture allow it to deliver compliant RS-232 perfor-
mance from a single power supply ranging from +3.0V to +5.5V. At voltages between 2.7V
and 3.0V the driver outputs are compliant with RS-562 and can interface to RS-232 over
short cables.
The Auto On-line
®
Plus feature allows the device to automatically “wake-up” during a shut-
down state upon detecting activity and to enter a low power shutdown if idle. This power
saving feature functions without system intervention or modifications to software or driv-
ers.
SELECTION TABLE
Package
20 SSOP/TSSOP
20 SSOP/TSSOP
16 SSOP/TSSOP
16 SSOP/TSSOP
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com
SP3224E,3225E,3226E,3227E_0_087
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (Vcc).................................................-0.3V to + 6.0V
V+ (Note 1)................................................................-0.3V to + 7.0V
V- (Note 1).................................................................+0.3V to - 7.0V
|V+| + |V-| .................................................................................+13V
Input voltage at TTL input pins ............................-0.3V to Vcc+0.3V
RxIN......................................................................................... ±16V
Driver output (from Ground).................................................. ±13.2V
RxOUT, STATUS..................................................-0.3V to Vcc+0.3V
Short Circuit Duration, TxOUT to GND,. Continuous
(One output at a time maximum)
Storage Temperature...............................................-65°C to +150°C
Operating Temperature SP322XECX...........................0°C to +70°C
Operating Temperature SP322XEEX........................-40°C to +85°C
Lead Temperature (soldering, 10s)....................................... +300°C
Note 1: V+ and V- can have maximum magnitudes of 7V, but their
absolute difference cannot exceed 13V.
Maximum junction temperature.....................................................150°C
Thermal Derating, Junction to Ambient
SSOP20..............................................................................
θ
JA
=83°C/W
TSSOP20.......................................................................
θ
JA
=110.7°C/W
SSOP16..............................................................................
θ
JA
=87°C/W
TSSOP16.......................................................................
θ
JA
=100.4°C/W
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.
ELECTRICAL SPECIFICATIONS
Unless otherwise noted V
CC
= +3.0V to +5.5V, T
AMB
= T
MIN
to T
MAX
,. Typical values are at T
AMB
= +25°C.
C1–C4 = 0.1μF tested at 3.3V ±10%. C1=0.047μF C2–C4 = 0.33μF tested at 5V ±10%.
Parameters
DC Characteristics
Supply Current, Auto On-Line® Plus
Supply Current, Shutdown
Supply Current, Active
Supply Current, Active
Driver Input and Logic Input Pins
High
Logic Input
Voltage
Low
Logic Threshold
Logic Input Leakage Current
Logic Input Hysteresis
Receiver Outputs and STATUS Output
Receiver Output Voltage Low
Receiver Output Voltage High
Note 2: Characterized, not 100% tested.
V
ol
V
oh
I
out
= -.6mA
I
out
= mA
Vcc
- 0.6
0.4
V
V
V
ih
V
ih
V
il
V
t
I
il
V
hys
.5
0.05
00
±1.0
μA
mV
Vcc = 3.3V
Vcc = 5.0V
2
2.4
0.8
V
I
cc3
I
cc
2
I
cc
I
cc
Receivers idle, TxIN = Vcc or GND,
ONLINE = GND, SHUTDOWN = Vcc
Note 2
SHUTDOWN = GND
ONLINE
=
SHUTDOWN = Vcc, No Load
ONLINE
=
SHUTDOWN = V
cc
=3.3V,
No Load
.5
0.7
0
0
3.0
2.0
μA
μA
mA
mA
Symb
Test Conditions
Min.
Typ.
Max.
Unit
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com
SP3224E,3225E,3226E,3227E_0_087
2
Unless otherwise noted V
CC
= +3.0V to +5.5V, T
AMB
= T
MIN
to T
MAX
,. Typical values are at T
AMB
= +25°C.
C1–C4 = 0.1μF tested at 3.3V ±10%. C1=0.047μF C2–C4 = 0.33μF tested at 5V ±10%.
Parameters
Driver Outputs
Output Voltage Swing
Short Circuit Current
Power-Off Impedance
Output Leakage Current
Receiver Inputs
Input Voltage Range
Input Threshold Low
Input Threshold High
Input Hysteresis
Input Resistance
ESD Protection
ESD Protection for R_In, T_Out pins
All Other Pins
Auto On-line Plus (ONLINE = GND, SHUTDOWN = Vcc)
Rx Input Threshold to STATUS output high
Rx Input Threshold to STATUS output low
Threshold to STATUS high
Threshold to STATUS low
Rx or Tx transition to drivers enabled
Last Rx or Tx transition to drivers disabled
t
sth
t
stl
t
online
t
offline
Note 3
Note 2, 3
5
±0.3
0.5
30
00
30
60
±2.7
®
ELECTRICAL SPECIFICATIONS
Symb
Test Conditions
Min.
Typ.
Max.
V
o
Output load = 3kΩ to GND
Output load = Open Circuit
V
out
= 0V
Vcc=V+ = V- = 0
transmitter outputs= ±2V
Vcc = 0 or 3V to 3.3V, V
out
= ±12V, Drivers disabled
±5.0
±6.0
±15.0
±60
V
mA
Ω
±25
μA
300
10M
-5
Vcc = 3.3V
Vcc = 5.0V
Vcc = 3.3V
Vcc = 5.0V
3
Human Body Model
Human Body Model
0.6
0.8
.2
.5
.5
.8
500
5
±15
±2
5
V
V
2.4
2.4
V
mV
7
kΩ
kV
kV
V
V
μs
μs
μs
sec
Note 3: A transmitter/receiver edge is defined as a transition through input logic thresholds.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com
SP3224E,3225E,3226E,3227E_0_087
3
TIMING CHARACTERISTICS
Unless otherwise noted V
cc
= +3.0V to +5.5V, T
Amb
= T
min
to T
mAx
,. Typical values are at T
Amb
= +25°C. C1–C4 =
0.1μF tested at 3.3V ±10%. C1=0.047μF C2–C4 = 0.33μF tested at 5V ±10%
Parameters
SP3224E and SP3226E
Maximum Data Rate
R
L
= 3kΩ, C
L
= 1000pF. One
transmitter switching.
Measurement taken from
+3.0V to -3.0V or -3.0V to +3.0V,
T
Amb
= 25°c
R
L
= 3kΩ to 7kΩ,
C
L
= 50pF to 000pF
t
RPHL
, t
RPLH
R_IN to R_OUT,
C
L
= 50pF
250
kbps
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Transition -Region
Slew Rate
4
30
V/μs
Receiver Propagation
Delay
Receiver Output
Enable Time
Receiver Output
Disable Time
Receiver Skew
0.22
µs
t
RZH
, t
RZL
t
RHZ
, t
RLZ
R
L
= 3kΩ, C
L
= 50pF
0.2
2
µs
0.2
|t
PHL
- t
PLH
| at 1.5V
200
2
µs
ns
Parameters
SP3225E and SP3227E
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Maximum Data Rate
R
L
= 3kΩ, C
L
= 250pF. One
transmitter Switching
R
L
= 3kΩ, C
L
= 1000pF. One
transmitter Switching
Measurement taken from +3.0V
to -3.0V or -3.0V to +3.0V,
T
Amb
=25°C
R
L
= 3kΩ to 7kΩ,
C
L
= 50pF to 250pF
000
500
kbps
kbps
Instantaneous Slew
Rate
24
50
V/μs
Driver Skew
Receiver Propagation
Delay
Receiver Output
Enable Time
Receiver Output
Disable Time
Receiver Skew
|t
DPHL
- t
DPLH
|
t
RPHL
, t
RPLH
t
RZH
, t
RZL
t
RHZ
, t
RLZ
|t
PHL
- t
PLH
|
at zero crossing
R_IN to R_OUT, C
L
= 50pF
75
0.20
0.3
0.2
2
2
ns
µs
µs
µs
ns
at 1.5V
80
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com
SP3224E,3225E,3226E,3227E_0_087
4
TyPICAL PERFORMANCE CHARACTERISTICS:CURVES
2.5
1.6
TxIn to RxOut Propagation Delay (us)
TxIn to RxOut Propagation Delay (us)
1.4
1.2
1
0.8
0.6
0.4
2
1.5
1
0.5
TxIn to RxOut Propagation Delay (us)
0
0
1000
2000
3000
4000
5000
Load Capacitance (pF)
TxIn to RxOut Propagation Delay (us)
0.2
0
0
1000
2000
3000
4000
5000
Load Capacitance (pF)
SP3224E/SP3226E Transmitter Input to
Receiver Output Propagation Delay vs.
Load Capacitance
30
SP3225E/SP3227E Transmitter Input to
Receiver Output Propagation Delay vs.
Load Capacitance
45
Transmitter Output Slew Rate (V/us)
Transmitter Output Slew Rate (V/us)
40
35
30
25
20
15
10
SRavg
SRneg
SRpos
25
20
SRneg
15
SRavg
10
SRpos
5
Transmitter Output Slew Rate (V/us)
0
0
1000
2000
3000
4000
5000
Load Capacitance (pF)
5
Transmitter Output Slew Rate (V/us)
0
0
1000
2000
3000
4000
5000
Load Capacitance (pF)
SP3224E/SP3226E Transmitter Output
Slew Rate vs. Load Capacitance
SP3225E/SP3227E Transmitter Output
Slew Rate vs. Load Capacitance
6
V+
6
V+
Transmitter Output Voltage (V)
Transmitter Output Voltage (V)
2000
3000
4000
5000
4
4
2
2
0
0
-2
-2
Transmitter Output Voltage (V)
-4
V-
-6
0
1000
Load Capacitance (pF)
Trasmitter Output Voltage (V)
-4
V-
-6
0
1000
2000
3000
4000
5000
Load Capacitance (pF)
SP3224E/SP3226E Transmitter Output
Voltage vs. Load Capacitance
5
SP3225E/SP3227E Transmitter Output
Voltage
SP3224E,3225E,3226E,3227E_0_087
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com
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