SP207E Datasheet, PDF (11/16 Pages) Sipex Corporation – +5V High Performance RS232 Transceivers

For the Human Body Model, the current limiting
resistor (R_S) and the source capacitor (C_S) are
1.5kΩ an 100pF, respectively. For IEC-1000-4-2,
the current limiting resistor (R_S) and the source
capacitor (C_S) are 330Ω an 150pF, respectively.
The higher C_S value and lower R_S 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
V_MAX/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