SP3223EBCA-L/TR Exar Corporation, SP3223EBCA-L/TR Datasheet - Page 17

• Manufacturer Part Number: SP3223EBCA-L/TR
• Description: Intelligent +3.0V To +5.5V RS-232 Transceivers
• Manufacturer: Exar Corporation
• Type: Transceiverr

Specifications of SP3223EBCA-L/TR

• Number Of Drivers/receivers: 2/2
• Protocol: RS232
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP (0.200", 5.30mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The circuit model in Figures 24 and 25 rep-
resent the typical ESD testing circuit used for
all three methods. The C
with the DC power supply when the first
switch (SW) is on. Now that the capacitor
is charged, the second switch (SW2) is on
while SW switches off. The voltage stored
in the capacitor is then applied through R
the current limiting resistor, onto the device
under test (DUT). In ESD tests, the SW2
switch is pulsed so that the device under
test receives a duration of voltage.
For the Human Body Model, the current
limiting resistor (R
(C
IEC-000-4-2, the current limiting resistor
(R
an 50pF, respectively.
The higher C
the IEC000-4-2 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.
Figure 25. ESD Test Circuit for IEC000-4-2
Table 4. Transceiver ESD Tolerance Levels
Driver Outputs
Receiver Inputs
S
S
DEVICE PIN
) are 1.5kΩ an 100pF, respectively. For
) and the source capacitor (C
TESTED
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com
S
value and lower R
S
) and the source capacitor
HUMAN BODY
S
MODEL
±15kV
±15kV
is initially charged
S
) are 330Ω
S
value in
Air Discharge
S
,
7
±15kV
±15kV
Figure 26. ESD Test Waveform for IEC000-4-2
5A
30A
0A
t=0ns
Direct Contact
IEC1000-4-2
±8kV
±8kV
t →
SP3223E/EB/EU_00_20
t=30ns
Level
4
4