1
SP3238EDS/04
SP3238E +3.0V to +5.5V RS-232 Transceivers
Copyright 1999 Sipex Corporation
e
c
i
v
e
D
s
e
i
l
p
p
u
S
r
e
w
o
P
2
3
2
-
S
R
s
r
e
v
i
r
D
2
3
2
-
S
R
s
r
e
v
i
e
c
e
R
l
a
n
r
e
t
x
E
s
t
n
e
n
o
p
m
o
C
e
n
i
l
n
O
-
o
t
u
A
y
r
t
i
u
c
r
i
C
e
t
a
t
S
-
3
L
T
T
f
o
.
o
N
s
n
i
P
E
1
2
2
3
P
S
V
5
.
5
+
o
t
V
0
.
3
+
1
1
s
r
o
t
i
c
a
p
a
c
4
S
E
Y
S
E
Y
6
1
E
3
2
2
3
P
S
V
5
.
5
+
o
t
V
0
.
3
+
2
2
s
r
o
t
i
c
a
p
a
c
4
S
E
Y
S
E
Y
0
2
E
3
4
2
3
P
S
V
5
.
5
+
o
t
V
0
.
3
+
3
5
s
r
o
t
i
c
a
p
a
c
4
S
E
Y
S
E
Y
8
2
E
8
3
2
3
P
S
V
5
.
5
+
o
t
V
0
.
3
+
5
3
s
r
o
t
i
c
a
p
a
c
4
S
E
Y
S
E
Y
8
2
SP3238E
Intelligent +3.0V to +5.5V RS-232 Transceivers
The SP3238E device is an RS-232 transceiver solution intended for portable or hand-held
applications such as notebook and palmtop computers. The SP3238E uses an internal
high-efficiency, charge-pump power supply that requires only 0.1
F capacitors in 3.3V
operation. This charge pump and Sipex's driver architecture allow the SP3238E device to
deliver compliant RS-232 performance from a single power supply ranging from +3.0V to
+5.0V. The SP3238E is a 5-driver/3-receiver device, ideal for laptop/notebook computer and
PDA applications. The SP3238E includes one complementary receiver that remains alert to
monitor an external device's Ring Indicate signal while the device is shutdown.
The
Auto-Online 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 1
A.
s
Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
s
Interoperable with EIA/TIA-232 and
adheres to EIA/TIA-562 down to a +2.7V
power source
s
Auto-Online
TM
circuitry automatically
wakes up from a 1
A shutdown
s
Minimum 250Kbps data rate under load
s
Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of V
CC
Variations
s
Enhanced ESD Specifications:
+15KV Human Body Model
+15KV IEC1000-4-2 Air Discharge
+8KV IEC1000-4-2 Contact Discharge
DESCRIPTION
SELECTION TABLE
Applicable U.S. Patents - 5,306,954; and other patents pending.
SIGNAL PROCESSING EXCELLENCE
SP3238EDS/04
SP3238E +3.0V to +5.5V RS-232 Transceivers
Copyright 1999 Sipex Corporation
2
NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 15V.
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, ONLINE,
SHUTDOWN, EN ...............................-0.3V to +6.0V
RxIN...................................................................+15V
Output Voltages
TxOUT...............................................................+15V
RxOUT, STATUS.......................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration
TxOUT.....................................................Continuous
Storage Temperature......................-65
C to +150
C
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.
SPECIFICATIONS
Power Dissipation per package
28-pin SSOP (derate 11.2mW/
o
C above +70
o
C).......900mW
28-pin TSSOP (derate 13.2mW/
o
C above +70
o
C)...1100mW
PARAMETER
MIN.
TYP.
MAX.
UNITS
CONDITIONS
DC CHARACTERISTICS
Supply Current,
Auto-Online
1.0
10
A
All RxIN open, ONLINE = GND,
SHUTDOWN = V
CC
Supply Current, Shutdown
1.0
10
A
SHUTDOWN = GND
Supply Current,
Auto-Online
0.4
2.0
mA
ONLINE = SHUTDOWN = V
CC
,
Disabled
no load
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold
V
CC
= +3.3V or +5.0V, TxIN
LOW
0.8
V
ONLINE, SHUTDOWN
HIGH
2.4
Input Leakage Current
+0.01
+1.0
A
TxIN, ONLINE, SHUTDOWN
T
AMB
= 25
O
C
Output Leakage Current
+0.05
+10
A
Receivers Disabled
Output Voltage LOW
0.4
V
I
OUT
= 1.6mA
Output Voltage HIGH
V
CC
- 0.6 V
CC
-0.1
V
I
OUT
= 1.0mA
3
SP3238EDS/04
SP3238E +3.0V to +5.5V RS-232 Transceivers
Copyright 1999 Sipex Corporation
R
E
T
E
M
A
R
A
P
.
N
I
M
.
P
Y
T
.
X
A
M
S
T
I
N
U
S
N
O
I
T
I
D
N
O
C
S
T
U
P
T
U
O
R
E
V
I
R
D
g
n
i
w
S
e
g
a
t
l
o
V
t
u
p
t
u
O
0
.
5
4
.
5
V
K
3
h
t
i
w
d
e
d
a
o
l
s
t
u
p
t
u
o
r
e
v
i
r
d
ll
A
D
N
G
o
t
e
c
n
a
t
s
i
s
e
R
t
u
p
t
u
O
0
0
3
V
C
C
V
,
V
0
=
-
V
=
+
V
=
T
U
O
V
2
=
t
n
e
r
r
u
C
t
i
u
c
r
i
C
-
t
r
o
h
S
t
u
p
t
u
O
5
3
0
7
0
0
1
D
B
T
A
m
V
T
U
O
D
N
G
=
V
T
U
O
=
V
5
1
t
n
e
r
r
u
C
e
g
a
k
a
e
L
t
u
p
t
u
O
5
2
A
V
C
C
,
V
5
.
5
o
t
V
0
.
3
r
o
V
0
=
V
T
U
O
d
e
l
b
a
s
i
d
s
r
e
v
i
r
D
,
V
5
1
=
S
T
U
P
N
I
R
E
V
I
E
C
E
R
e
g
n
a
R
e
g
a
t
l
o
V
t
u
p
n
I
5
1
-
5
1
V
W
O
L
d
l
o
h
s
e
r
h
T
t
u
p
n
I
6
.
0
2
.
1
V
V
C
C
V
3
.
3
=
W
O
L
d
l
o
h
s
e
r
h
T
t
u
p
n
I
8
.
0
5
.
1
V
V
C
C
V
0
.
5
=
H
G
I
H
d
l
o
h
s
e
r
h
T
t
u
p
n
I
5
.
1
4
.
2
V
V
C
C
V
3
.
3
=
H
G
I
H
d
l
o
h
s
e
r
h
T
t
u
p
n
I
8
.
1
4
.
2
V
V
C
C
V
0
.
5
=
s
i
s
e
r
e
t
s
y
H
t
u
p
n
I
3
.
0
V
e
c
n
a
t
s
i
s
e
R
t
u
p
n
I
3
5
7
k
e
n
il
n
O
-
o
t
u
A
e
n
il
n
O
-
o
t
u
A
e
n
il
n
O
-
o
t
u
A
e
n
il
n
O
-
o
t
u
A
e
n
il
n
O
-
o
t
u
A
V
=
N
W
O
D
T
U
H
S
,
D
N
G
=
E
N
I
L
N
O
(
S
C
I
T
S
I
R
E
T
C
A
R
A
H
C
Y
R
T
I
U
C
R
I
C
C
C
)
W
O
L
e
g
a
t
l
o
V
t
u
p
t
u
O
S
U
T
A
T
S
4
.
0
V
I
T
U
O
A
m
6
.
1
=
H
G
I
H
e
g
a
t
l
o
V
t
u
p
t
u
O
S
U
T
A
T
S
V
C
C
6
.
0
-
V
I
T
U
O
A
m
0
.
1
-
=
s
r
e
v
i
r
D
o
t
d
l
o
h
s
e
r
h
T
r
e
v
i
e
c
e
R
t
(
d
e
l
b
a
n
E
E
N
I
L
N
O
)
0
0
2
S
5
1
e
r
u
g
i
F
e
v
i
t
a
g
e
N
r
o
e
v
i
t
i
s
o
P
r
e
v
i
e
c
e
R
H
G
I
H
S
U
T
A
T
S
o
t
d
l
o
h
s
e
r
h
T
t
(
H
S
T
S
)
5
.
0
S
5
1
e
r
u
g
i
F
e
v
i
t
a
g
e
N
r
o
e
v
i
t
i
s
o
P
r
e
v
i
e
c
e
R
W
O
L
S
U
T
A
T
S
o
t
d
l
o
h
s
e
r
h
T
t
(
L
S
T
S
)
0
2
S
5
1
e
r
u
g
i
F
SPECIFICATIONS (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.
SP3238EDS/04
SP3238E +3.0V to +5.5V RS-232 Transceivers
Copyright 1999 Sipex Corporation
4
SPECIFICATIONS (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.
Figure 1. Transmitter Output Voltage VS. Load
Capacitance
Figure 2. Slew Rate VS. Load Capacitance
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 235Kbps data rate, all drivers
loaded with 3k
, 0.1
F charge pump capacitors, and T
AMB
= +25
C.
6
4
2
0
-2
-4
-6
T
ransmitter Output
V
olta
g
e
[V]
Load Capacitance [pF]
Vout+
Vout-
500
1000
1500
0
14
12
10
8
6
4
2
0
Sle
w Rate [V/
s]
Load Capacitance [pF]
+Slew
-Slew
0
500
1000
1500
2000
R
E
T
E
M
A
R
A
P
.
N
I
M
.
P
Y
T
.
X
A
M
S
T
I
N
U
S
N
O
I
T
I
D
N
O
C
S
C
I
T
S
I
R
E
T
C
A
R
A
H
C
G
N
I
M
I
T
e
t
a
R
a
t
a
D
m
u
m
i
x
a
M
0
5
2
s
p
b
k
R
L
k
3
=
C
,
L
e
v
i
t
c
a
r
e
v
i
r
d
e
n
o
,
F
p
0
0
0
1
=
y
a
l
e
D
n
o
i
t
a
g
a
p
o
r
P
r
e
v
i
e
c
e
R
t
L
H
P
t
H
L
P
5
1
.
0
5
1
.
0
s
C
,
t
u
p
t
u
o
r
e
v
i
e
c
e
R
o
t
t
u
p
n
i
r
e
v
i
e
c
e
R
L
F
p
0
5
1
=
e
m
i
T
e
l
b
a
n
E
t
u
p
t
u
O
r
e
v
i
e
c
e
R
0
0
2
s
n
n
o
i
t
a
r
e
p
o
l
a
m
r
o
N
e
m
i
T
e
l
b
a
s
i
D
t
u
p
t
u
O
r
e
v
i
e
c
e
R
0
0
2
s
n
n
o
i
t
a
r
e
p
o
l
a
m
r
o
N
w
e
k
S
r
e
v
i
r
D
0
0
1
0
0
5
s
n
t
|
L
H
P
t
-
H
L
P
T
,
|
B
M
A
5
2
=
o
C
w
e
k
S
r
e
v
i
e
c
e
R
0
0
2
0
0
0
1
s
n
t
|
L
H
P
t
-
H
L
P
|
e
t
a
R
w
e
l
S
n
o
i
g
e
R
-
n
o
i
t
i
s
n
a
r
T
0
3
/
V
s
V
C
C
R
,
V
3
.
3
=
L
k
3
=
T
,
B
M
A
5
2
=
o
,
C
r
o
V
0
.
3
+
o
t
V
0
.
3
-
m
o
r
f
n
e
k
a
t
s
t
n
e
m
e
r
u
s
a
e
m
V
0
.
3
-
o
t
V
0
.
3
+
5
SP3238EDS/04
SP3238E +3.0V to +5.5V RS-232 Transceivers
Copyright 1999 Sipex Corporation
E
M
A
N
N
O
I
T
C
N
U
F
N
I
P
.
O
N
+
2
C
.
r
o
t
i
c
a
p
a
c
p
m
u
p
-
e
g
r
a
h
c
g
n
i
t
r
e
v
n
i
e
h
t
f
o
l
a
n
i
m
r
e
t
e
v
i
t
i
s
o
P
1
D
N
G
.
d
n
u
o
r
G
2
-
2
C
.
r
o
t
i
c
a
p
a
c
p
m
u
p
-
e
g
r
a
h
c
g
n
i
t
r
e
v
n
i
e
h
t
f
o
l
a
n
i
m
r
e
t
e
v
i
t
a
g
e
N
3
-
V
.
p
m
u
p
e
g
r
a
h
c
e
h
t
y
b
d
e
t
a
r
e
n
e
g
t
u
p
t
u
o
V
5
.
5
-
d
e
t
a
l
u
g
e
R
4
T
1
T
U
O
.
t
u
p
t
u
o
r
e
v
i
r
d
2
3
2
-
S
R
5
T
2
T
U
O
.
t
u
p
t
u
o
r
e
v
i
r
d
2
3
2
-
S
R
6
T
3
T
U
O
.
t
u
p
t
u
o
r
e
v
i
r
d
2
3
2
-
S
R
7
R
1
N
I
.
t
u
p
n
i
r
e
v
i
e
c
e
r
2
3
2
-
S
R
8
R
2
N
I
.
t
u
p
n
i
r
e
v
i
e
c
e
r
2
3
2
-
S
R
9
T
4
T
U
O
.
t
u
p
t
u
o
r
e
v
i
r
d
2
3
2
-
S
R
0
1
R
3
N
I
.
t
u
p
n
i
r
e
v
i
e
c
e
r
2
3
2
-
S
R
1
1
T
5
T
U
O
.
t
u
p
t
u
o
r
e
v
i
r
d
2
3
2
-
S
R
2
1
E
N
I
L
N
O
e
d
i
r
r
e
v
o
o
t
H
G
I
H
c
i
g
o
l
y
l
p
p
A
e
n
i
l
n
O
-
o
t
u
A
e
v
i
t
c
a
s
r
e
v
i
r
d
g
n
i
p
e
e
k
y
r
t
i
u
c
r
i
c
.
)
2
e
l
b
a
T
o
t
r
e
f
e
r
,
H
G
I
H
c
i
g
o
l
e
b
o
s
l
a
t
s
u
m
N
W
O
D
T
U
H
S
(
3
1
N
W
O
D
T
U
H
S
ll
a
s
e
d
i
r
r
e
v
o
s
i
h
T
.
p
m
u
p
e
g
r
a
h
c
d
n
a
s
r
e
v
i
r
d
n
w
o
d
t
u
h
s
o
t
W
O
L
c
i
g
o
l
y
l
p
p
A
-
o
t
u
A
e
n
i
l
n
O
.
)
2
e
l
b
a
T
o
t
r
e
f
e
r
(
E
N
I
L
N
O
d
n
a
y
r
t
i
u
c
r
i
c
4
1
S
U
T
A
T
S
.
s
u
t
a
t
s
n
w
o
d
t
u
h
s
d
n
a
e
n
il
n
o
g
n
i
t
a
c
i
d
n
i
t
u
p
t
u
O
S
O
M
C
/
L
T
T
5
1
R
1
T
U
O
.
n
w
o
d
t
u
h
s
n
i
e
v
i
t
c
a
,
t
u
p
t
u
o
1
-
r
e
v
i
e
c
e
r
g
n
i
t
r
e
v
n
i
-
n
o
N
6
1
T
5
N
I
.
t
u
p
n
i
r
e
v
i
r
d
S
O
M
C
/
L
T
T
7
1
R
3
T
U
O
.
t
u
p
t
u
o
r
e
v
i
e
c
e
r
S
O
M
C
/
L
T
T
8
1
T
4
N
I
.
t
u
p
n
i
r
e
v
i
r
d
S
O
M
C
/
L
T
T
9
1
R
2
T
U
O
.
t
u
p
t
u
o
r
e
v
i
e
c
e
r
S
O
M
C
/
L
T
T
0
2
R
1
T
U
O
.
t
u
p
t
u
o
r
e
v
i
e
c
e
r
S
O
M
C
/
L
T
T
1
2
T
3
N
I
.
t
u
p
n
i
r
e
v
i
r
d
S
O
M
C
/
L
T
T
2
2
T
2
N
I
.
t
u
p
n
i
r
e
v
i
r
d
S
O
M
C
/
L
T
T
3
2
T
1
N
I
.
t
u
p
n
i
r
e
v
i
r
d
S
O
M
C
/
L
T
T
4
2
-
1
C
.
r
o
t
i
c
a
p
a
c
p
m
u
p
-
e
g
r
a
h
c
r
e
l
b
u
o
d
e
g
a
t
l
o
v
e
h
t
f
o
l
a
n
i
m
r
e
t
e
v
i
t
a
g
e
N
5
2
V
C
C
.
e
g
a
t
l
o
v
y
l
p
p
u
s
V
5
.
5
+
o
t
V
0
.
3
+
6
2
+
V
.
p
m
u
p
e
g
r
a
h
c
e
h
t
y
b
d
e
t
a
r
e
n
e
g
t
u
p
t
u
o
V
5
.
5
+
d
e
t
a
l
u
g
e
R
7
2
+
1
C
.
r
o
t
i
c
a
p
a
c
p
m
u
p
-
e
g
r
a
h
c
r
e
l
b
u
o
d
e
g
a
t
l
o
v
e
h
t
f
o
l
a
n
i
m
r
e
t
e
v
i
t
i
s
o
P
8
2
Table 1. Device Pin Description
PDF 
ZIP