Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com

SP207E_00_072309

2

DEVICE PIN

HuMAN bODY

IEC1000-4-2

TESTED

MODEL

Air Discharge

Direct Contact

Level

DriverOutputs +5kV

+5kV

+8kV

4

Receiver Inputs

+5kV

+5kV

+8kV

4

EIA STANDARDS

The Electronic Industry Association (EIA)

developed several standards of data

transmission which are revised and up-

dated 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

962 and, since that time, has become an

industry standard.

Table 3. Transceiver ESD Tolerance Levels

TheRS-232isarelativelyslowdataexchange

protocol, with a maximum baud rate of only

20kbps, which can be transmitted over a

maximumcopperwirecablelengthof50feet.

The SP207E through SP23E Series of data

communications interface products have

been designed to meet both the EIAprotocol

standards, and the needs of the industry.

The larger storage capacitor injects a

highervoltagetothetestpointwhenSW2

is switched on. The lower current limiting

resistor increases the current charge onto

the test point.