SP3244E Datasheet, PDF (14/22 Pages) Sipex Corporation – 3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus

Auto On-Line® Plus Truth Table
Operating mode
Forced Shutdown
ONLINE
X
SHUTDOWN
|RxIN| > ± 2.7 V
Idle inputs
(RxIN & TxIN)
0
X
X
Forced Online
Auto On-line^® Plus
(Wake When Active)
Auto On-line^® Plus
(Off-Line When Idle)
Auto On-line^® Plus
(Wake On Cable)
Auto On-line^® Plus
(Wake When Active)
Auto On-line^® Plus
(Off-Line When Idle)
Auto On-line^®
(Wake On Cable)
Auto On-line^®
(Auto Shutoff)
1
0
0
STATUS
STATUS
STATUS
STATUS
STATUS
1
1
1
1
1
1
STATUS
STATUS
X
X
X
active
X
idle > 30s
yes
X
no
active
no
idle > 30s
yes
X
no
X
TxOUT
high-Z
active
active
high-Z
active
active
high-Z
active
high-Z
DESCRIPTION
RxOUT
high-Z
active
active
active
active
active
active
active
active
R2OUT
active
active
active
active
active
active
active
active
active
ESD Test Conditions
ESD performance depends on a variety of
conditions. Contact Sipex for a reliability report
that documents test setup, methodology and
results.
IEC 1000-4-2
The IEC 1000-4-2 standard covers ESD
testing and performance of finished equip-
ment. However, it does not specifically refer to
integrated circuits. The SP3244E/3245E helps
you design equipment to meet IEC 1000-4-2,
without sacrificing boardspace and cost for
external ESD-protection components. The
major difference between tests done using the
Human Body Model and IEC 1000-4-2 is a
higher peak current in IEC 1000-4-2.
Series resistance is lower in the IEC 1000-4-2
model. Hence, the ESD withstand voltage mea-
sured to IEC 1000-4-2 is generally lower than
that measured using the Human Body Model.
The air-gap test involves approaching the
device with a charged probe. The contact
discharge method connects the probe to the
device before the probe is energized.
Machine Model
The machine model for ESD tests all pins using
a 200pF storage capacitor and zero discharge
resistance. The objective is to emulate the
stress caused when I/O pins are contacted by
handling equipment during test and assembly.
ESD Table
Device Pin Tested
TxOUT
RxIN
Human Body Model
± 15kV
± 15kV
TxIN, RxOUT, ONLINE,
SHUTDOWN, STATUS
± 2kV
Air discharge
± 15kV
± 15kV
± 2kV
IEC1000-4-2
Contact discharge
± 8kV
± 8kV
± 2kV
Level
4
4
1
Rev M 10/9/06
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line^® Plus
14
© Copyright 2006 Sipex Corporation