• www.maxlinear.com• Rev 1.0.2
SP202E, SP232E, SP233E
Data Sheet
High Performance RS-232 Line Drivers / Receivers
General Description
The SP202E, SP232E and SP233E devices are a family of
line driver and receiver pairs that meets the specifications of
RS-232 and V.28 serial protocols. The devices are pin-to-pin
compatible with MaxLinear’s SP232A and SP233A devices
as well as popular industry standard pinouts. The ESD
tolerance has been improved on these devices to over ±15kV
for Human Body Model. This series offers a 120kbps data
rate under load, small ceramic type 0.1µF charge pump
capacitors and overall ruggedness for commercial
applications. Features include MaxLinear’s BiCMOS design
which allows low power operation without sacrificing
performance. The series is available in lead free packages
and includes commercial and industrial temperature ranges.
Features
■Operates from a single +5V power supply
■Meets all RS-232D and ITU V.28 specifications
■Operates with 0.1µF to 10µF ceramic capacitors
■No external capacitors required (SP233E)
■High data rate - 120kbps under load
■Low power CMOS operation
■Lead-free packaging
■Improved ESD specifications: ±15kV Human Body Model
Ordering Information - page 13
Selection Table
Table 1: Selection Table
Model Number of RS-232 Number of external 0.1uF
capacitors
Drivers Receivers
SP202E 2 2 4
SP232E 2 2 4
SP233E 2 2 0
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Revision History
3/28/19 Rev 1.0.2 ii
Revision History
Document No. Release Date Change Description
A 7/19/04 Original Sipex Data Sheet.
1.0.0 11/6/08 Generate new Data Sheet using Exar format and change revision to 1.0.0. Remove IEC Air
and Contact ESD ratings. Update ordering information to remove EOL part numbers.Update
charge pump description to show regulated charge pump design.
1.0.1 6/3/11 Remove SP310ECP-L and SP310EEP-L per PDN 110510-01
1.0.2 3/28/19 Update to MaxLinear format. Update ordering information. Moved ESD ratings to under
Absolute Maximum Ratings. Removed obsolete SP310E and SP312E.
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Table of Contents
3/28/19 Rev 1.0.2 iii
Table of Contents
General Description............................................................................................................................................. i
Features............................................................................................................................................................... i
Selection Table..................................................................................................................................................... i
Specifications ..................................................................................................................................................... 1
Absolute Maximum Ratings...........................................................................................................................................1
ESD Ratings..................................................................................................................................................................1
Electrical Characteristics ...............................................................................................................................................2
Performance Curves........................................................................................................................................... 3
Pin Information ................................................................................................................................................... 4
Pin Configurations .........................................................................................................................................................4
Description.......................................................................................................................................................... 5
Theory Of Operation..................................................................................................................................................... 5
Drivers .......................................................................................................................................................................... 5
Receivers ..................................................................................................................................................................... 5
Charge pump................................................................................................................................................................ 5
Phase 1 ................................................................................................................................................................5
Phase 2 ................................................................................................................................................................5
Phase 3 ................................................................................................................................................................6
Phase 4 ................................................................................................................................................................6
Pin Strapping for the SP233E .......................................................................................................................................7
ESD Tolerance ............................................................................................................................................................. 7
Typical Performance Characteristics................................................................................................................ 8
Mechanical Dimensions ................................................................................................................................... 10
NSOIC16 .....................................................................................................................................................................10
Mechanical Dimensions ................................................................................................................................... 11
WSOIC16 ....................................................................................................................................................................11
Mechanical Dimensions ................................................................................................................................... 12
WSOIC20 ....................................................................................................................................................................12
Ordering Information........................................................................................................................................ 13
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet List of Figures
3/28/19 Rev 1.0.2 iv
List of Figures
Figure 1: V- Voltage.............................................................................................................................................. 3
Figure 2: V+ Voltage............................................................................................................................................. 3
Figure 3: ICC vs. Temperature .............................................................................................................................. 3
Figure 4: VOH vs. VCC........................................................................................................................................... 3
Figure 5: SP202E Pin Configuration..................................................................................................................... 4
Figure 6: SP232E Pin Configuration..................................................................................................................... 4
Figure 7: SP233E Pin Configuration..................................................................................................................... 4
Figure 8: Charge Pump Phases ........................................................................................................................... 6
Figure 9: ESD Test Circuit for Human Body Model .............................................................................................. 7
Figure 10: SP232E Charge Pump Waveforms, No Load, (1 = C1+, 2 = C2+, 3 = V+, 4 = V-) ............................. 8
Figure 11: SP232E Charge Pump Waveforms, When Fully Loaded with 3kΩ
(1 = C1+, 2 = C2+, 3 = V+, 4 = V-)........................................................................................................ 8
Figure 12: Loopback Results at 60kHz and 2500pF load, (1 = TXIN, 2 = TXOUT/RXIN, 3 = RXOUT) .................... 8
Figure 13: Charge Pump Outputs, at Start Up (1 = VCC, 2 = V+, 3 = V-) ............................................................. 8
Figure 14: SP202E and SP232E Typical Application Circuit ................................................................................ 9
Figure 15: SP233E Typical Application Circuit ..................................................................................................... 9
Figure 16: Mechanical Dimension, NSOIC16..................................................................................................... 10
Figure 17: Mechanical Dimensions, WSOIC16 .................................................................................................. 11
Figure 18: Mechanical Dimensions, WSOIC20 .................................................................................................. 12
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet List of Tables
3/28/19 Rev 1.0.2 v
List of Tables
Table 1: Selection Table........................................................................................................................................ i
Table 2: Absolute Maximum Ratings .................................................................................................................... 1
Table 3: ESD Ratings ........................................................................................................................................... 1
Table 4: Electrical Characteristics ........................................................................................................................ 2
Table 5: SP233E Pin Strapping ............................................................................................................................ 7
Table 6: Ordering Information............................................................................................................................. 13
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Specifications
3/28/19 Rev 1.0.2 1
Specifications
Absolute Maximum Ratings
Important: This is a stress rating only and functional operation of the device at these ratings or any other above those
indicated in the operation section of the specification is not implied. Exposure to absolute maximum ratings conditions for
extended periods of time may affect reliability.
ESD Ratings
Table 2: Absolute Maximum Ratings
Parameter Minimum Maximum Units
Supply voltage (VCC) 6.0 V
V+ VCC - 0.3 11.0 V
V- -11.0 V
Input Voltages
TIN -0.3 VCC +0.3 V
RIN -15 15 V
Output Voltages
TOUT V+, 0.3V V-, -0.3V V
ROUT -0.3 VCC + 0.3 V
Short Circuit Duration
TOUT Continuous
Package Power Dissipation
Small outline (derate 7mW/°C above 70°C) 375 mW
Storage temperature -65 150 °C
Table 3: ESD Ratings
Parameter Limit Units
HBM (Human Body Model) ±15 kV
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Electrical Characteristics
3/28/19 Rev 1.0.2 2
Electrical Characteristics
VCC = 5V ± 10%, 0.1µF charge pump capacitors, TMIN to TMAX, unless otherwise noted. Typical values are VCC = 5V and
TA = 25°C
Table 4: Electrical Characteristics
Parameter Test Condition Minimum Typical Maximum Units
TTL Input
Logic threshold LOW TIN, EN, SD, ON/OFF 0.8 V
Logic threshold HIGH TIN, EN, SD, ON/OFF 2.0 V
Logic pull-up current TIN = 0V 15 200 µA
TTL Output
Output voltage LOW IOUT = 3.2mA, VCC = 5V 0.4 V
Output voltage HIGH IOUT = -1.0mA 3.5 V
RS-232 Output
Output voltage swing All transmitter outputs loaded with
3kΩ to GND ±5.0 ±6.0 V
Output resistance VCC = 0V, VOUT = ±2V 300 Ω
Output short circuit current Infinite duration ±18 mA
Maximum data rate CL = 2500pF, RL = 3kΩ 120 240 kbps
RS-232 Input
Voltage range -15 15 V
Voltage threshold LOW VCC = 5V, TA = 25°C 0.8 1.2 V
Voltage threshold HIGH VCC = 5V, TA = 25°C 1.7 2.8 V
Hysteresis VCC = 5V, TA = 25°C 0.2 0.5 1.0 V
Resistance TA = 25°C, -15V ≤ VIN ≤ 15V 3 5 7 kΩ
Dynamic Characteristics
Driver propagation delay TTL to RS-232; CL = 50pF 1.5 3.0 µs
Receiver propagation delay RS-232 to TTL 0.1 1.0 µs
Instantaneous slew rate CL = 10pF, RL = 3-7kΩ, TA = 25°C 30 V/µs
Transition region slew rate CL = 2500pF, RL = 3kΩ, measured
from 3V to -3V or -3V to 3V
10 V/µs
Power Requirements
VCC power supply current No load, VCC = 5V, TA = 25°C 3 5 mA
VCC power supply current, loaded All transmitters RL = 3kΩ, TA = 25°C 15 mA
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Performance Curves
3/28/19 Rev 1.0.2 3
Performance Curves
Figure 1: V- Voltage Figure 2: V+ Voltage
02468101214
Load Current (mA)
V– Voltage (Volts)
-3
-4
-5
-6
-7
-8
-9
-10
-11
V
CC
= 6V
V
CC
= 5V
V
CC
= 4V
0 5 10 15 20
Load Current (mA)
0
6
8
10
12
V+ (Volts)
2
4
VCC = 5V
VCC = 4V
VCC = 6V
25 30 35 40
Figure 3: ICC vs. Temperature Figure 4: VOH vs. VCC
-55 -40 0 25 70 85
125
Temperature
(
C
)
0
5
10
15
20
25
30
VCC = 6V
VCC = 5V
VCC = 4V
VCC = 3V
ICC (mA)
4.5 4.75 5.0 5.25 5.
5
V
CC
(Volts)
5.0
6.5
7.0
7.5
8.0
8.5
9.0
Load current = 0mA
T
A
= 25C
V
OH
(Volts)
5.5
6.0
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Pin Information
3/28/19 Rev 1.0.2 4
Pin Information
Pin Configurations
Figure 5: SP202E Pin Configuration
Figure 6: SP232E Pin Configuration
Figure 7: SP233E Pin Configuration
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Description
3/28/19 Rev 1.0.2 5
Description
The SP202E, SP232E and SP233E devices are a family of
line driver and receiver pairs that meet the EIA / TIA-232
and V-28 serial communications protocols. The ESD
tolerance has been improved on these devices to over
±15kV for Human Body Model. These devices are pin-to-
pin compatible with MaxLinear’s SP232A and SP233A as
well as popular industry standards.This family of parts offer
a 120kbps data rate, 10V/us slew rate and an on-board
charge pump that operates from a single 5V supply using
0.1µF ceramic capacitors.
The SP202E, SP232E and SP233E devices have internal
charge pump voltage converters which allow them to
operate from a single +5V supply. The charge pumps will
operate with polarized or non-polarized capacitors ranging
from 0.1 to 10µF and will generate the ±6V needed to
generate the RS-232 output levels.
The SP233E design offers internal charge pump
capacitors.
Theory Of Operation
The SP202E, SP232E and SP233E devices are made up
of three basic circuit blocks: 1. Drivers, 2. Receivers, and
3. charge pump. Each block is described below.
Drivers
The drivers are inverting level transmitters that convert TTL
or CMOS logic levels to EIA / TIA-232 levels with an
inverted sense relative to the input logic levels. The typical
driver output voltage swing is ±6V. Even under worst case
loading conditions of 3kΩ and 2500pF, the driver output is
guaranteed to be ±5.0V minimum, thus satisfying the
RS-232 specification. The driver outputs are protected
against infinite short-circuits to ground without degradation
in reliability.
The slew rate of the driver output is internally limited to
30V/µs in order to meet the EIA standards (EIA-232F).
Additionally, the driver outputs LOW to HIGH transition
meets the monotonic output requirements of the standard.
Receivers
The receivers convert EIA / TIA-232 signal levels to
inverted TTL or CMOS logic output levels. Since the input
is usually from a transmission line, where long cable length
and system interference can degrade the signal, the inputs
have a typical hysteresis margin of 500mV. This ensures
that the receiver is virtually immune to noisy transmission
lines. The input thresholds are 0.8V minimum and 2.8V
maximum, again well within the ±3V RS-232 requirements.
Should an input be left unconnected, an internal 5kΩ pull-
down resistor to ground will commit the output of the
receiver to a HIGH state.
In actual system applications, it is quite possible for signals
to be applied to receiver inputs before power is applied to
the receiver circuitry. This occurs, for example, when a PC
user attempts to print, only to realize that the printer wasn't
turned on. In this case an RS-232 signal from the PC will
appear on the receiver input at the printer. When the printer
power is turned on, the receiver will operate normally. All of
these devices are fully protected.
Charge pump
The charge pump is an Exar patented design and uses a
unique approach compared to older less efficient designs.
The charge pump requires 4 external capacitors and uses
a four phase voltage shifting technique. The internal power
supply consists of a dual charge pump that provides a
driver output voltage swing of ±6V. The internal oscillator
controls the four phases of the voltage shifting. A
description of each phase follows:
Phase 1
VSS charge store and double: The positive terminals of
capacitors C1 and C2 are charged from VCC with their
negative terminals initially connected to ground. C1+ is
then connected to ground and the stored charge from C1-
is superimposed onto C2-. Since C2+ is still connected to
VCC the voltage potential across C2 is now 2 x VCC.
Phase 2
VSS transfer and invert: Phase two connects the negative
terminal of C2 to the VSS storage capacitor and the positive
terminal of C2 to ground. This transfers the doubled and
inverted (V-) voltage onto C4. Meanwhile, capacitor C1 is
charged from VCC to prepare it for its next phase.
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Description
3/28/19 Rev 1.0.2 6
Phase 3
VDD charge store and double: Phase three is identical to
the first phase. The positive terminals of C1 and C2 are
charged from VCC with their negative terminals initially
connected to ground. C1+ is then connected to ground and
the stored charge from C1- is superimposed onto C2-.
Since C2+ is still connected to VCC the voltage potential
across capacitor C2 is now 2 x VCC.
Phase 4
VDD transfer: The fourth phase connects the negative
terminal of C2 to ground and the positive terminal of C2 to
the VDD storage capacitor. This transfers the doubled (V+)
voltage onto C3. Meanwhile, capacitor C1 is charged from
VCC to prepare it for its next phase.
The clock rate for the charge pump typically operates at
greater than 15kHz allowing the pump to run efficiently with
small 0.1µF capacitors. Efficient operation depends on
rapid charging and discharging of C1 and C2, therefore
capacitors should be mounted as close as possible to the
IC and have low ESR (equivalent series resistance).
Inexpensive surface mount, ceramic capacitors are ideal
for use on the charge pump. If polarized capacitors are
used, the positive and negative terminals should be
connected as shown in the typical operating circuit. A
diagram of the individual phases are shown in Figure 8.
Figure 8: Charge Pump Phases
C
2
+
-
V
CC
C
3
C
4
C
1
+ +
+
e
-
e
-
Phases 1 and 3: Store/Double.
Double charge from C 1 onto C2.
C 2 is now charged to -2xVcc
+
C
2
+
-
V
CC
C
3
C
4
C
1
+ +
+
e
-
+
e
+
e
+
C
2
+
-
V
CC
C
3
C
4
C
1
+ +
+
Phase 2 – Vss transfer from C2 to C4.
Meanwhile C 1 is charged to Vcc
e
-
e
-
e
-
+
Vss
transfer from C2 to C3.
Meanwhile C1 is charged to Vcc
V
DD
V-
V+
V-
V+
V+
Patented 5,306,954
Phase 4 V
DD
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Pin Strapping for the SP233E
3/28/19 Rev 1.0.2 7
Pin Strapping for the SP233E
To operate properly, the following pairs of pins must be
externally wired together as noted in Table 5:
ESD Tolerance
The SP202E, SP232E and SP233E devices incorporate
ruggedized ESD cells on all driver outputs and receiver
input pins. The ESD structure is improved over our
previous family for more rugged applications and
environments sensitive to electro-static discharges and
associated transients. The improved ESD tolerance is at
least ±15kV Human Body Model without damage nor latch-
up.
The Human Body Model has been the generally accepted
ESD testing method for semiconductors. This method is
also specified in MIL-STD-883, Method 3015.7 for ESD
testing.
The premise of this ESD test is to simulate the human
body's potential to store electro-static energy and
discharge it to an integrated circuit. The simulation is
performed by using a test model as shown in Figure 9. This
method will test the IC's capability to withstand an ESD
transient during normal handling such as in manufacturing
areas where the IC's tend to be handled frequently.
Figure 9: ESD Test Circuit for Human Body Model
Table 5: SP233E Pin Strapping
Pins Wired Together SOICW
Two V- pins 10 & 17
Two C2+ pins 12 & 15
Two C- pins 11 & 16
Connect pins 6 and 9 to GND
C
S
R
S
SW1
R
C
Device
Under
Test
DC Power
Source
SW2
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Typical Performance Characteristics
3/28/19 Rev 1.0.2 8
Typical Performance Characteristics
Figure 10: SP232E Charge Pump Waveforms
No Load
(1 = C1+, 2 = C2+, 3 = V+, 4 = V-)
Figure 11: SP232E Charge Pump Waveforms
When Fully Loaded with 3kΩ
(1 = C1+, 2 = C2+, 3 = V+, 4 = V-)
Figure 12: Loopback Results
at 60kHz and 2500pF load
(1 = TXIN, 2 = TXOUT/RXIN, 3 = RXOUT)
Figure 13: Charge Pump Outputs
at Start Up
(1 = VCC, 2 = V+, 3 = V-)
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Typical Performance Characteristics
3/28/19 Rev 1.0.2 9
Figure 14: SP202E and SP232E
Typical Application Circuit
Figure 15: SP233E Typical Application Circuit
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Mechanical Dimensions
3/28/19 Rev 1.0.2 10
Mechanical Dimensions
NSOIC16
Figure 16: Mechanical Dimension, NSOIC16
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Mechanical Dimensions
3/28/19 Rev 1.0.2 11
Mechanical Dimensions
WSOIC16
Figure 17: Mechanical Dimensions, WSOIC16
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Mechanical Dimensions
3/28/19 Rev 1.0.2 12
Mechanical Dimensions
WSOIC20
Figure 18: Mechanical Dimensions, WSOIC20
Revision: A
Drawing No.: POD-000000
TOP VIEW
TERMINAL DETAILS
SIDE VIEW 2
SIDE VIEW 1
©
146
SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Ordering Information
3/28/19 Rev 1.0.2 13
Ordering Information
1. Refer to www.maxlinear.com/SP202E, www.maxlinear.com/SP232E, and www.maxlinear.com/SP233E for most up-to-date Ordering Information.
2. Visit www.maxlinear.com for additional information on Environmental Rating.
Table 6: Ordering Information
Ordering Part Number Operating Temperature Range Lead-Free Package Packaging Method
SP202ECN-L
0°C to 70°C
Yes(2)
NSOIC16 Tube
SP202ECN-L/TR Reel
SP202ECT-L WSOIC16 Tube
SP202ECT-L/TR Reel
SP202EEN-L
-40°C to 85°C NSOIC16 Tube
SP202EEN-L/TR Reel
SP202EET-L/TR WSOIC16 Reel
SP232ECN-L
0°C to 70°C NSOIC16 Tube
SP232ECN-L/TR Reel
SP232ECT-L/TR WSOIC16 Reel
SP232EEN-L
-40°C to 85°C
NSOIC16 Tube
SP232EEN-L/TR Reel
SP232EET-L/TR WSOIC16 Reel
SP233EET-L WSOIC20 Tube
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SP202E, SP232E, SP233E High Performance RS-232 Line Drivers / Receivers Data Sheet Disclaimer
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