SP3244E-SP3245E
3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus
• Contains 3-Drivers and 5-Receivers;
Single-chip DTE (PC or terminal) serial port transceiver
• Auto On-line
®
Plus
• SP3244E slew-controlled to 250Kbps under load
• SP3245E 1Mbps data rate for high-speed RS-232
• Meets true EIA/TIA-232-F and ITU V.28 standards
from a +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 regardless of V
CC
variations
• ESD Specifications:
±
15KV Human Body Model
±
15KV IEC1000-4-2 Air Discharge
±
8KV IEC1000-4-2 Contact Discharge
FEATURES
C2+ 1
C2- 2
V- 3
28 C1+
27 V+
26 V
CC
25 GND
R
1
IN 4
24 C1-
R
2
IN 5
R
3
IN 6 SP3244E 23 ONLINE
SP3245E
22 SHUTDOWN
R
4
IN 7
21 STATUS
R
5
IN 8
T
1
OUT 9
T
2
OUT 10
T
3
OUT 11
T
3
IN 12
T
2
IN 13
T
1
IN 14
20 R
2
OUT
19 R
1
OUT
18 R
2
OUT
17 R
3
OUT
16 R
4
OUT
15 R
5
OUT
APPLICATIONS
• Portable RS-232
• Laptops and handheld PCs and PDA
• Cellular telephones, datacables, chargingcradles
• Diagnostic/upload ports on embedded applications
• Use in conjunction with low-voltage UART or
microcontroller
• SP3244E is cross-compatible with MAX3244E,
ICL3244E
• SP3245E is cross-compatible with MAX3245E,
ICL3245E
The SP3244E/3245E is a 3-driver/5-receiver device ideal for mobile phone, consumer and PDA
applications. These devices use an internal high-efficiency, charge-pump power supply that requires
only 0.1µF capacitors for 3.3V single-supply operation. This charge pump and Sipex’s driver archi-
tecture allow the SP3244E/3245E to deliver compliant RS-232 performance from a 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 in portable applications.
The Auto On-line
®
Plus feature allows the device to automatically enter a low power shutdown
mode if all receiver and driver inputs have been idle for 30 seconds. The device will “wake-up” from
this automatic shutdown state upon detecting activity. This power saving feature functions without
system intervention or modifications to software or drivers.
SP3244E supports serial data rates of 250kbps minimum under full load and while maintaining
slew rates of less than 30V/µs. SP3245E is capable of high speed communication of up to 1Mbps.
Rev M 10/9/06
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line
®
Plus
© Copyright 2006 Sipex Corporation
DESCRIPTION
1
PIN ASSIGNMENTS
NAME
C2+
C2-
V-
R1IN
R2IN
R3IN
R4IN
R5IN
T1OUT
T2OUT
T3OUT
T3IN
T2IN
T1IN
R5OUT
R4OUT
R3OUT
R2OUT
R1OUT
FUNCTION
Positive terminal of the inverting charge pump capacitor.
Negative terminal of the inverting charge pump capacitor.
Regulated -5.5V output generated by the charge pump.
RS-232 receiver input.
RS-232 receiver input.
RS-232 receiver input.
RS-232 receiver input.
RS-232 receiver input.
RS-232 driver output.
RS-232 driver output.
RS-232 driver output.
TTL/CMOS driver input.
TTL/CMOS driver input.
TTL/CMOS driver input.
TTL/CMOS receiver output.
TTL/CMOS receiver output.
TTL/CMOS receiver output.
TTL/CMOS receiver output.
TTL/CMOS receiver output.
Non-inverting receiver 2 output; active in shutdown.
Status output.
Forced SHUTDOWN input. Drive low to shut down drivers, receivers
and charge pump. Will override Auto On-line
®
Plus. Do not leave this
pin open.
Auto On-line
®
input. Active low enabled automatic power saving
feature. Equivalent to competitor's FORCEON pin. Do not leave this
pin open.
Negative terminal of the voltage doubler charge pump capacitor.
Ground connection.
Device power supply pin (3.0V to 5.5V).
Regulated +5.5V output generated by the charge pump.
Positive terminal of the voltage doubler charge pump capacitor.
PIN NUMBER
(T)SSOP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
QFN
29
30
31
1
2
3
4
5
6
7
8
10
11
12
13
14
15
17
18
19
20
21
R2OUT
STATUS
SHUTDOWN
ONLINE
C1-
GND
VCC
V+
C1+
23
24
25
26
27
28
22
23
24
26
27
28
Rev M 10/9/06
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line
®
Plus
© Copyright 2006 Sipex Corporation
2
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 pin.. -0.3V toV
CC
+0.3V
RxIN..............................................................+/-18V
Driver output (from Ground)...................... +/-13.2V
RxOUT, STATUS.....................-0.3V to V
CC
+ 0.3V
Short Circuit Duration, TxOUT to GND, Continuous
(One output at a time maximum)
Storage Temperature.....................-65°C to +150°C
Operating Temperature SP324XECX................0°C to +70°C
Operating Temperature SP324XEEX...........-40°C to +85°C
Lead Temperature (soldering, 10s)..............+300°C
SSOP-28,
ø
JA
= 67.1ºC/W
TSSOP-28,
ø
JA
= 83.6ºC/W
QFN- 32,
ø
JA=
22.4ºC/W
These are stress ratings only and functional
operation of the device at these ratings or
any other above those indicated in the opera-
tion sections of the specifications below is not
implied. Exposure to absolute maximum rating
conditions for extended periods of time may
affect reliability.
NOTE 1: V+ and V- can have maximum
magnitudes of 7V, but their absolute difference
cannot exceed 13V.
Unless otherwise noted V
CC
= +3.0V to +5.5V, T
AMB
= T
MIN
to T
MAX
, C1–C4 = 0.1µF.
Typical values are at T
AMB
= +25°C, V
CC
= 3.3V.
PARAMETERS
DC CHARACTERISTICS
Supply Current,
Auto On-Line
®
Plus
Supply Current, Shutdown
Supply Current, Active
Driver Input and Logic Input Pins:
High
Low
Logic Threshold
Logic Input Leakage Current
Logic Input Hysteresis
V
IH
V
IL
V
T
I
IL
V
HYS
Vcc = 3.3V
Vcc = 5.0V
I
CC3
I
CC2
I
CC1
Receivers idle, TxIN = Vcc or GND,
ONLINE = GND, SHUTDOWN = Vcc
Note 1
SHUTDOWN = GND
ONLINE = SHUTDOWN = Vcc, No
Load
SYMB
TEST CONDITIONS
ELECTRICAL CHARACTERISTICS
MIN.
TYP.
MAX.
UNIT
1
1
1
10
10
5
µA
µA
mA
2
2.4
0.8
1.5
0.01
100
±1.0
µA
mV
V
Logic
Input
Voltage
Receiver Outputs and STATUS Output
Receiver Output Voltage Low
Receiver Output Voltage High
Receiver Output Leakage Current
Note 1: Characterized, not 100% tested.
V
OL
V
OH
I
OZ
I
OUT
= -1.6mA
I
OUT
= 1mA
Receivers disabled.
0.4V < V
O
< 5.5V
V
CC
-0.6
±0.02
±1
0.4
V
V
µA
Rev M 10/9/06
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line
®
Plus
© Copyright 2006 Sipex Corporation
3
Unless otherwise noted V
CC
= +3.0V to +5.5V, T
AMB
= T
MIN
to T
MAX
, C1–C4 = 0.1µF.
Typical values are at T
AMB
= +25°C, V
CC
= 3.3V.
PARAMETERS
Receiver Inputs
Input Voltage Range
Input Threshold Low
V
CC
= 3.3V
V
CC
= 5.0V
Input Threshold High
V
CC
= 3.3V
V
CC
= 5.0V
Input Hysteresis
Input Resistance
Driver Outputs
Output Voltage Swing
V
O
All transmitter outputs loaded with
3kΩ to GND
Output load = Open Circuit
Short Circuit Current
Power-Off Impedance
Output Leakage Current
Mouse Drivability
Vout = 0V
V
CC
= V+ = V- = 0, transmitter
outputs = ±2V
V
CC
= 0 or 3V to 3.3V, V
OUT
= ±12V,
Drivers disabled
T1IN = T2IN = GND, T3IN = V
CC
,
T3 loaded with 3kΩ to GND, T1OUT
and T2OUT loaded with 2.5mA each
T
A
= 25ºC
3
SYMB
TEST CONDITIONS
ELECTRICAL CHARACTERISTICS
MIN.
TYP.
MAX.
UNIT
-15
0.6
0.8
1.0
1.2
1.2
1.7
200
4.5
+15
V
V
2.4
2.4
V
V
mV
7
kΩ
±5.0
±5.6
±15.0
±60
V
mA
Ω
300
10M
±25
µA
±5.0
V
ESD Protection
IEC 1000-4-2 Air Discharge
ESD Protection for RxIn, TxOut
pins
IEC 1000-4-2 Contact Discharge
Human Body Model
All Other Pins
Human Body Model
±15
±8
±15
±2
kV
kV
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 Driv-
ers Disabled
t
STH
t
STL
t
ONLINE
t
OFFLINE
Note 1
±0.3
0.4
30
100
15
30
60
±2.7
V
V
µs
µs
µs
sec
Note 1: Characterized, not 100% tested.
Rev M 10/9/06
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line
®
Plus
© Copyright 2006 Sipex Corporation
4
Unless otherwise noted V
CC
= +3.0V to +5.5V, T
AMB
= T
MIN
to T
MAX
, C1–C4 = 0.1µF. Typical values are
at T
AMB
= +25°C, V
CC
= 3.3V.
PARAMETERS
SP3244E
Maximum Data Rate
Driver Propagation Delay
Transition-Region Slew Rate
t
DPHL
,
t
DPLH
R
L
= 3kΩ, C
L
= 1000pF. One
transmitter switching.
C
L
=1000pF
R
L
=3kΩ to 7kΩ, C
L
=150pF to
1000pF, measurements taken
from +3V to -3V or from -3V to
+3V.
|t
DPHL
- t
DPLH
| at zero crossing
t
RPHL
,t
RPLH
t
RZH
, t
RZL
t
RZH
, t
RLZ
|t
PHL
- t
PLH
| at 1.5V
R
IN
to R
OUT
, C
L
= 150pF
250
1600
kbps
ns
SYMBOL
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
TIMING CHARACTERISTICS
4
30
V/µs
Driver Skew
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Receiver Skew
SP3245E
Maximum Data Rate
50
0.15
0.04
0.1
40
2.0
2.0
ns
µs
µs
µs
ns
R
L
= 3kΩ, C
L
= 250pF. One
transmitter switching.
R
L
= 3kΩ, C
L
= 1000pF. One
transmitter switching.
1000
500
700
24
100
0.15
0.05
0.1
2.0
2.0
150
kbps
kbps
ns
V/µs
ns
µs
µs
µs
ns
Driver Propagation Delay
Transition-Region Slew Rate
t
DPHL
,
t
DPLH
C
L
=250pF
R
L
=3kΩ to 7kΩ, C
L
=150pF to
250pF, measurements taken from
+3V to -3V or from -3V to +3V.
|t
DHPL
- t
DPLH
| at zero crossing
Driver Skew
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Receiver Skew
t
RPHL
,t
RPLH
t
RZH
, t
RZL
t
RZH
, t
RLZ
R
IN
to R
OUT
, C
L
= 150pF
|t
PHL
- t
PLH
| at 1.5V
90
Rev M 10/9/06
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line
®
Plus
© Copyright 2006 Sipex Corporation
5
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