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PDF SP213EH Data sheet ( Hoja de datos )
| Número de pieza | SP213EH | |
| Descripción | High Speed +5V High Performance RS232 Transceivers | |
| Fabricantes | Sipex | |
| Logotipo |  |
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® SP207EH–SP213EH
High Speed +5V High Performance
RS232 Transceivers
s Single +5V Supply Operation
s 0.1µF External Charge Pump Capacitors
s 500Kbps Data Rate Under Load
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 Ideal for High Speed RS-232 Applications
s Improved ESD Specifications:
+15kV Human Body Model
+15kV IEC1000-4-2 Air Discharge
+8kV IEC1000-4-2 Contact Discharge
DESCRIPTION
The SP207EH/208EH/211EH/213EH devices are high speed enhanced multi-channel
RS-232 line transceivers with improved electrical performance. The SP207EH/208EH/
211EH/213EH series is a superior drop-in replacement to our previous versions as well as
popular industry standards. All devices feature low-power CMOS construction and the
Sipex-patented (5,306,954) on-board charge pump circuitry that generates the +10V
RS-232 voltage levels using 0.1µF charge pump capacitors. The SP211E and SP213E
devices feature a low-power shutdown mode, which reduces power supply drain to 1µA.
Enhancements to this series include a higher transmission rate of 500Kbps, a lower
power supply current at 3mA typical (no load), and superior ESD performance. The ESD
tolerance has been improved for this series to over +15kV for both Human Body Model and
IEC1000-4-2 Air Discharge test methods.
Nu RS232
Model Drivers Receivers
SP207EH 5
3
SP208EH 4
4
SP211EH 4
5
SP213EH 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
SP207EHDS/08
SP207EH Series High Performance Transceivers
1
© Copyright 2000 Sipex Corporation
1 page  
FEATURES
As in the original RS-232 multi-channel
products, the SP207EH Series high speed
multi-channel RS-232 line transceivers provide
a variety of configurations to fit most designs,
especially high speed applications where +12V
is not available. The SP207EH Series is a
superior high speed drop-in replacement to our
previous versions as well as popular industry
standards.
All devices in this series feature low-power
CMOS construction and Sipex's 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 production costs.
The devices in this series provide different
driver/receiver combinations to match any
application requirement.
The SP211EH and SP213EH models feature a
low–power shutdown mode, which reduces
power supply drain to 1µA. The SP213EH
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) oper-
ating temperatures.
THEORY OF OPERATION
The SP207EH Series devices are made up of
three basic circuit blocks — 1) transmitter/
driver, 2) receiver and 3) the SIPEX–propri-
etary charge pump. Each model within the
Series incorporates variations of these circuits
to achieve the desired configuration and
performance.
VCC = +5V
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 capacitor C2, and Figure 3b shows
the negative side of capacitor 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
+
C1 –
–5V
+5V
+
C2 –
–5V
C4
+ – VDD Storage Capacitor
– + VSS Storage Capacitor
C3
Figure 1. Charge Pump — Phase 1
SP207EHDS/08
SP207EH 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 (R ) and the source
S
capacitor (CS) are 330Ω an 150pF, respectively.
The higher C value and lower R value in the
SS
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 SP207EH through SP213EH 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
Driver output Maximum Voltage
Driver Output Signal Level
Loaded
Unloaded
Driver Load Impedance
Max. Driver Output Current
(High Impedance State)
Power On
Power Off
Slew Rate
Receiver Input Voltage Range
Receiver Input Sensitivity
Receiver Input Resistance
20Kb/s
±25V
±5V
±15V
3 – 7Kohm
VMAX/300
30V/µs max.
±15V
±3V
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
100µA
Controls Provided
±12V
±200mV
4Kohm min.
±100µA
–7V to +7V
±200mV
4Kohm min.
RS–485
Differential
32 Drivers
32 Receivers
4,000 feet
10Mb/s
–7V to +12V
RS–562
Single–Ended
1 Driver
1 Receiver
C ≤ 2,500pF @ <20Kbps;
C ≤1,000pF @ >20Kbps
64Kb/s
–3.7V to +13.2V
±1.5V
±5V
54 ohm
±3.7V
±13.2V
3–7Kohm
±100µA
±100µA
–7V to +12V
±200mV
12Kohm min.
30V/µs max.
±15V
±3V
3–7Kohm
SP207EHDS/08
SP207EH Series High Performance Transceivers
11
© Copyright 2000 Sipex Corporation
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SP213EH.PDF ] | |
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