Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

ISL32372EIVZ Fiches technique(PDF) 11 Page - Intersil Corporation

No de pièce ISL32372EIVZ
Description  QUAD, 짹16.5kV ESD Protected, 3.0V to 5.5V, Low Power, RS-422 Transmitters
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  INTERSIL [Intersil Corporation]
Site Internet  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL32372EIVZ Fiches technique(HTML) 11 Page - Intersil Corporation

Back Button ISL32372EIVZ Datasheet HTML 7Page - Intersil Corporation ISL32372EIVZ Datasheet HTML 8Page - Intersil Corporation ISL32372EIVZ Datasheet HTML 9Page - Intersil Corporation ISL32372EIVZ Datasheet HTML 10Page - Intersil Corporation ISL32372EIVZ Datasheet HTML 11Page - Intersil Corporation ISL32372EIVZ Datasheet HTML 12Page - Intersil Corporation ISL32372EIVZ Datasheet HTML 13Page - Intersil Corporation ISL32372EIVZ Datasheet HTML 14Page - Intersil Corporation ISL32372EIVZ Datasheet HTML 15Page - Intersil Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 20 page
background image
11
FN6824.0
December 16, 2008
µcontrollers, and today most of these devices use power
supplies significantly lower than 3.3V. Thus, the logic
device’s low VOH might not exceed the VIH of a 3.3V or 5V
powered DI or enable input. Connecting the VL pin to the
power supply of the logic device (as shown in Figure 6)
reduces the DI and enable input switching points to values
compatible with the logic device’s output levels. Tailoring the
logic pin input switching points to the supply voltage of the
UART, ASIC, or µcontroller eliminates the need for a level
shifter/translator between the two ICs.
VL can be anywhere from VCC down to 1.5V, and Table 2
indicates typical VIH and VIL values for various VL settings
so the user can ascertain whether or not a particular VL
voltage meets his needs.
Hot Plug Function
When a piece of equipment powers up, there is a period of
time where the processor or ASIC driving the RS-422 control
lines (EN, EN, ENx) is unable to ensure that the RS-422 Tx
outputs remain disabled. If the equipment is connected to
the bus, a driver activating prematurely during power-up may
drive invalid data on the bus. To avoid this scenario, this
family incorporates a “Hot Plug” function. During power-up,
circuitry monitoring VCC ensures that the Tx outputs remain
disabled for a period of time, regardless of the state of the
enable pins. This gives the processor/ASIC a chance to
stabilize and drive the RS-422 control lines to the proper states.
ESD Protection
All pins on these devices include class 3 (>12kV) Human
Body Model (HBM) ESD protection structures, but the
RS-422 pins (driver outputs) incorporate advanced
structures allowing them to survive ESD events in excess
of ±15kV HBM, and ±16.5kV to IEC61000-4-2. The RS-422
pins are particularly vulnerable to ESD damage because
they typically connect to an exposed port on the exterior of
the finished product. Simply touching the port pins, or
connecting a cable, can cause an ESD event that might
destroy unprotected ICs. These new ESD structures
protect the device whether or not it is powered up, and
without degrading the RS-422 common mode range of
-0.3V to +6V. This built-in ESD protection eliminates the
need for board level protection structures (e.g., transient
suppression diodes), and the associated, undesirable
capacitive load they present.
IEC61000-4-2 Testing
The IEC61000 test method applies to finished equipment,
rather than to an individual IC. Therefore, the pins most likely
to suffer an ESD event are those that are exposed to the
outside world (the RS-422 pins in this case), and the IC is
tested in its typical application configuration (power applied)
rather than testing each pin-to-pin combination. The
IEC61000 standard’s lower current limiting resistor coupled
with the larger charge storage capacitor yields a test that is
much more severe than the HBM test. The extra ESD
protection built into this device’s RS-422 pins allows the
design of equipment meeting level 4 criteria without the need
for additional board level protection on the RS-422 port.
AIR-GAP DISCHARGE TEST METHOD
For this test method, a charged probe tip moves toward the
IC pin until the voltage arcs to it. The current waveform
delivered to the IC pin depends on approach speed,
humidity, temperature, etc., so it is difficult to obtain
repeatable results. The RS-422 pins withstand ±16.5kV
air-gap discharges.
CONTACT DISCHARGE TEST METHOD
During the contact discharge test, the probe contacts the
tested pin before the probe tip is energized, thereby
eliminating the variables associated with the air-gap
TABLE 2. VIH AND VIL vs VL FOR VCC = 3.3V OR 5V
VL (V)
VIH (V)
VIL (V)
1.6
0.7
0.45
2
0.85
0.6
2.3
1.1
0.75
2.7
1.4 (DI), 1.1 (ENs)
0.85
2.7
2
0.8
3.3
2.2
0.8
FIGURE 6. USING VL PIN TO ADJUST LOGIC LEVELS
GND
TXD
DEN
VCC = +2V
UART/PROCESSOR
GND
DI
EN
VCC = +3.3V
ISL32172E
VOH ≤ 2
VIH ≥ 2
GND
TXD
DEN
VCC = +2V
UART/PROCESSOR
GND
DI
EN
VCC = +3.3V
ISL32179E
VOH ≤ 2
VIH = 0.85V
VIH = 0.85V
VL
VOH ≤ 2
VIH ≥ 2
VOH ≤ 2
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E, ISL32374E, ISL32179E


Numéro de pièce similaire - ISL32372EIVZ

FabricantNo de pièceFiches techniqueDescription
logo
Intersil Corporation
ISL32372E INTERSIL-ISL32372E Datasheet
9Mb / 44P
   Providing high-performance solutions for every link in the signal chain
More results

Description similaire - ISL32372EIVZ

FabricantNo de pièceFiches techniqueDescription
logo
Renesas Technology Corp
ISL32172E RENESAS-ISL32172E Datasheet
1Mb / 21P
   QUAD, ±16.5kV ESD Protected, 3.0V to 5.5V, Low Power, RS-422 Transmitters
Mar 19, 2020
logo
Intersil Corporation
ISL32173E INTERSIL-ISL32173E Datasheet
478Kb / 22P
   QUAD, 짹16.5kV ESD Protected, 3.0V to 5.5V, RS-485/RS-422 Receivers
ISL3293E INTERSIL-ISL3293E Datasheet
641Kb / 17P
   짹16.5kV ESD Protected, 125째C, 3.0V to 5.5V, SOT-23/TDFN Packaged, Low Power, RS-485/RS-422 Transmitters
logo
Renesas Technology Corp
RAA7884QT RENESAS-RAA7884QT Datasheet
707Kb / 15P
   Quad, ±16.5kV ESD Protected, 3.0V to 5.5V, Low Power, RS-422 Transmitter
Oct.14.20
logo
Intersil Corporation
ISL32173EIVZ-T INTERSIL-ISL32173EIVZ-T Datasheet
952Kb / 22P
   QUAD, 16.5kV ESD Protected, 3.0V to 5.5V, RS-485/RS-422 Receivers
logo
Renesas Technology Corp
RAA7884QR RENESAS-RAA7884QR Datasheet
388Kb / 13P
   Quad, ±16.5kV ESD Protected, 3.0V to 5.5V, RS-485/RS-422 Receiver
Oct.14.20
logo
Intersil Corporation
ISL32613E INTERSIL-ISL32613E Datasheet
546Kb / 11P
   짹16.5kV ESD Protected, 125째C, 1.8V to 3.6V, Low Power, SOT-23, RS-485/RS-422 Transmitters
logo
Maxim Integrated Produc...
MAX3030E MAXIM-MAX3030E Datasheet
326Kb / 14P
   짹15kV ESD-Protected, 3.3V Quad RS-422 Transmitters
Rev 0; 10/02
MAX3040 MAXIM-MAX3040 Datasheet
262Kb / 15P
   짹10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
Rev 1; 12/01
logo
Intersil Corporation
ISL3280E INTERSIL-ISL3280E Datasheet
599Kb / 15P
   짹16.5kV ESD Protected, 125째C, 3.0V to 5.5V, SOT-23/TDFN Packaged, 20Mbps Full Fail-safe, Low Power, RS-485/RS-422 Receivers
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com