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PDF SP213E Data sheet ( Hoja de datos )
| Número de pieza | SP213E | |
| Descripción | +5V High Performance RS232 Transceivers | |
| Fabricantes | Sipex | |
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® SP207E–SP213E
+5V High Performance RS232 Transceivers
s Single +5V Supply Operation
s 0.1µF External Charge Pump Capacitors
s Typical 230kbps Transmission Rates
s Standard SOIC and SSOP Packages
s Lower Supply Current Than Competition
(typical 3mA)
s 1µA Shutdown Mode
s WakeUp Feature in Shutdown Mode
s Tri–State Receiver Outputs
s Meets All EIA-232 and ITU V.28
Specifications
s Improved ESD Specifications:
+15kV Human Body Model
+15kV IEC1000-4-2 Air Discharge
+8kV IEC1000-4-2 Contact Discharge
DESCRIPTION
The SP200E Series are enhanced multi–channel RS-232 line transceivers with improved
electrical performance. The SP200E family is pin-to-pin compatible with our previous SP200
family as well as popular industry standards. As with the orignal SP200 family, all models in this
Series feature low–power CMOS construction and Sipex–patented (5,306,954) on-board
charge pump circuitry to generate the ±10V RS-232 voltage levels, using 0.1µF charge pump
capacitors to save board space and reduce circuit cost. The SP211E and SP213E models feature
a low–power shutdown mode, which reduces power supply drain to 1µA. Enhancements include
lower power supply current at 3mA typical (no load) and superior ESD performance. The ESD
tolerance has been improved on this family to over ±15kV for both Human Body Model and
IEC1000-4-2 Air Discharge test methods.
Number of RS232
Model Drivers Receivers
SP207E 5
3
SP208E 4
4
SP211E 4
5
SP213E 4
5
Table 1. Model Selection Table
No. of Receivers
Active in Shutdown
0
0
0
2
No. of External
0.1µF Capacitors
4
4
4
4
Shutdown WakeUp TTL Tri–State
No No
No
No No
No
Yes No
Yes
Yes Yes
Yes
SP207EDS/09
SP207E Series High Performance Transceivers
1
© Copyright 2000 Sipex Corporation
1 page  
FEATURES
As in the original RS-232 multi-channel
products, the SP207E Series multi–channel
RS-232 line transceivers provide a variety of
configurations to fit most communication
needs, especially those applications where +12V
is not available. All models in this Series feature
low–power CMOS construction and SIPEX–
proprietary on-board charge pump circuitry to
generate the +10V RS-232 voltage levels. The
ability to use 0.1µF charge pump capacitors
saves board space and reduces circuit cost.
Different models within the Series provide
different driver/receiver combinations to
match any application requirement.
The SP211 and SP213E models feature a low–
power shutdown mode, which reduces power
supply drain to 1µA. The SP213E includes a
Wake-Up function which keeps two receivers
active in the shutdown mode, unless disabled by
the EN pin.
The family is available in 28–pin SO (wide) and
SSOP (shrink) small outline packages. Devices
can be specified for commercial (0°C to +70°C)
and industrial/extended (–40°C to +85°C)
operating temperatures.
THEORY OF OPERATION
The SP207E Series devices are made up of
three basic circuit blocks — 1) transmitter/
driver, 2) receiver and 3) the SIPEX–
proprietary charge pump. Each model within
the Series incorporates variations of these
circuits to achieve the desired configuration
and performance.
Charge–Pump
The charge pump is a Sipex–patented design
(5,306,954) and uses a unique approach
compared to older less–efficient designs. The
charge pump still requires four external capacitors,
but uses a four–phase voltage shifting technique
to attain symmetrical 10V power supplies.
Figure 3a shows the waveform found on the
positive side of capcitor C2, and Figure 3b
shows the negative side of capcitor C2. There is
a free–running oscillator that controls the four
phases of the voltage shifting. A description of
each phase follows.
Phase 1
— VSS charge storage —During this phase of the
clock cycle, the positive side of capacitors C1
and C2 are initially charged to +5V. Cl+ is then
switched to ground and the charge in C1– is
transferred to C –. Since C + is connected to
22
+5V, the voltage potential across capacitor C is
2
now 10V.
Phase 2
— VSS transfer — Phase two of the clock
connects the negative terminal of C2 to the VSS
storage capacitor and the positive terminal of C2
to ground, and transfers the generated –l0V to
C3. Simultaneously, the positive side of
capacitor C 1 is switched to +5V and the negative
side is connected to ground.
Phase 3
— VDD charge storage — The third phase of the
clock is identical to the first phase — the charge
transferred in C1 produces –5V in the negative
terminal of C1, which is applied to the negative
side of capacitor C . Since C + is at +5V, the
22
voltage potential across C is l0V.
2
VCC = +5V
+
C1 –
–5V
+5V
+
C2 –
–5V
C4
+ – VDD Storage Capacitor
– + VSS Storage Capacitor
C3
Figure 1. Charge Pump — Phase 1
SP207EDS/09
SP207E Series High Performance Transceivers
5
© Copyright 2000 Sipex Corporation
5 Page 
For the Human Body Model, the current limiting
resistor (RS) and the source capacitor (CS) are
1.5kΩ an 100pF, respectively. For IEC-1000-4-2,
the current limiting resistor (RS) and the source
capacitor (CS) are 330Ω an 150pF, respectively.
The higher CS value and lower RS value in the
IEC1000-4-2 model are more stringent than the
Human Body Model. The larger storage capacitor
injects a higher voltage to the test point when SW2
is switched on. The lower current limiting resistor
increases the current charge onto the test point.
EIA STANDARDS
The Electronic Industry Association (EIA)
developed several standards of data transmission
which are revised and updated in order to meet
the requirements of the industry. In data
processing, there are two basic means of
communicating between systems and components.
The RS--232 standard was first introduced in
1962 and, since that time, has become an
industry standard.
The RS-232 is a relatively slow data exchange
protocol, with a maximum baud rate of only
20kbps, which can be transmitted over a
maximum copper wire cable length of 50 feet.
The SP207E through SP213E Series of data
communications interface products have been
designed to meet both the EIA protocol
standards, and the needs of the industry.
DEVICE PIN
TESTED
HUMAN BODY
IEC1000-4-2
MODEL
Air Discharge Direct Contact
Driver Outputs
Receiver Inputs
+15kV
+15kV
+15kV
+15kV
+8kV
+8kV
Table 3. Transceiver ESD Tolerance Levels
Level
4
4
Specification
Mode of Operation
No. of Drivers and Receivers
Allowed on One Line
Maximum Cable Length
RS–232D
Single–Ended
1 Driver
1 Receiver
50 feet
Maximum Data Rate
20Kb/s
Driver output Maximum Voltage ±25V
Driver Output Signal Level
Loaded
Unloaded
±5V
±15V
Driver Load Impedance
3 – 7Kohm
Max. Driver Output Current
(High Impedance State)
Power On
Power Off
Slew Rate
VMAX/300
30V/µs max.
Receiver Input Voltage Range
±15V
Receiver Input Sensitivity
±3V
Receiver Input Resistance
3–7Kohm
Table 4. EIA Standard Definitions
RS–423A
Single–Ended
1 Driver
10 Receivers
4,000 feet
100Kb/s
±6V
±3.6V
±6V
450 ohm
RS–422
Differential
1 Driver
10 Receivers
4,000 feet
10Mb/s
–0.25V to +6V
±2V
±5V
100 ohm
RS–485
Differential
32 Drivers
32 Receivers
4,000 feet
10Mb/s
–7V to +12V
±1.5V
±5V
54 ohm
RS–562
Single–Ended
1 Driver
1 Receiver
C ≤ 2,500pF @ <20Kbps;
C ≤1,000pF @ >20Kbps
64Kb/s
–3.7V to +13.2V
±3.7V
±13.2V
3–7Kohm
100µA
Controls Provided
±12V
±200mV
4Kohm min.
±100µA
–7V to +7V
±200mV
4Kohm min.
±100µA
±100µA
–7V to +12V
±200mV
12Kohm min.
30V/µs max.
±15V
±3V
3–7Kohm
SP207EDS/09
SP207E Series High Performance Transceivers
11
© Copyright 2000 Sipex Corporation
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SP213E.PDF ] | |
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