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

X  

ISL4223EIR Fiches technique(PDF) 7 Page - Intersil Corporation

No de pièce ISL4223EIR
Description  QFN Packaged, /-15kV ESD Protected, 2.7V to 5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers
Download  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  INTERSIL [Intersil Corporation]
Site Internet  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL4223EIR Fiches technique(HTML) 7 Page - Intersil Corporation

Back Button ISL4223EIR Datasheet HTML 3Page - Intersil Corporation ISL4223EIR Datasheet HTML 4Page - Intersil Corporation ISL4223EIR Datasheet HTML 5Page - Intersil Corporation ISL4223EIR Datasheet HTML 6Page - Intersil Corporation ISL4223EIR Datasheet HTML 7Page - Intersil Corporation ISL4223EIR Datasheet HTML 8Page - Intersil Corporation ISL4223EIR Datasheet HTML 9Page - Intersil Corporation ISL4223EIR Datasheet HTML 10Page - Intersil Corporation ISL4223EIR Datasheet HTML 11Page - Intersil Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 13 page
background image
7
mode. For always enabled operation, FORCEON and
FORCEOFF are both strapped high. To switch between
active and powerdown modes, under logic or software
control, only the FORCEOFF input need be driven. The
FORCEON state isn’t critical, as FORCEOFF dominates
over FORCEON. Nevertheless, if strictly manual control over
powerdown is desired, the user must strap FORCEON high
to disable the automatic powerdown circuitry.
Connecting FORCEOFF and FORCEON together disables
the automatic powerdown feature, enabling them to function
as a manual SHUTDOWN input (see Figure 4).
The time to recover from automatic powerdown mode is
typically 100
µs.
Automatic Powerdown
Even greater power savings is available by using the
automatic powerdown function. When no valid RS-232
voltages (see Figure 6) are sensed on any receiver input for
30
µs, the charge pump and transmitters powerdown, thereby
reducing supply current to 10nA. Invalid receiver levels occur
whenever the driving peripheral’s outputs are shut off
(powered down) or when the RS-232 interface cable is
disconnected. The ISL422XE powers back up whenever it
detects a valid RS-232 voltage level on any receiver input.
This automatic powerdown feature provides additional
system power savings without changes to the existing
operating system.
Automatic powerdown operates when the FORCEON input
is low, and the FORCEOFF input is high. Tying FORCEON
high disables automatic powerdown, but manual powerdown
is always available via the overriding FORCEOFF input.
Table 2 summarizes the automatic powerdown functionality.
Some applications may need more time to wake up from
shutdown. If automatic powerdown is being utilized, the RS-
232 device will reenter powerdown if valid receiver levels
aren’t reestablished within 30
µs of the ISL422XE powering
up. Figure 5 illustrates a circuit that keeps the ISL422XE
TABLE 2. POWERDOWN AND ENABLE LOGIC TRUTH TABLE
RS-232 SIGNAL
PRESENT AT
RECEIVER INPUT?
FORCEOFF
INPUT
FORCEON
INPUT
EN
INPUT
TRANSMITTER
OUTPUTS
RECEIVER
OUTPUTS
INVALID
OUTPUT
MODE OF OPERATION
NO
H
H
L
Active
Active
L
Normal Operation
(Auto Powerdown Disabled)
NO
H
H
H
Active
High-Z
L
YES
H
L
L
Active
Active
H
Normal Operation
(Auto Powerdown Enabled)
YES
H
L
H
Active
High-Z
H
NO
H
L
L
High-Z
Active
L
Powerdown Due to Auto Powerdown
Logic
NO
H
L
H
High-Z
High-Z
L
YES
L
X
L
High-Z
Active
H
Manual Powerdown
YES
L
X
H
High-Z
High-Z
H
Manual Powerdown w/Rcvr. Disabled
NO
L
X
L
High-Z
Active
L
Manual Powerdown
NO
L
X
H
High-Z
High-Z
L
Manual Powerdown w/Rcvr. Disabled
FIGURE 4. CONNECTIONS FOR MANUAL POWERDOWN
WHEN NO VALID RECEIVER SIGNALS ARE
PRESENT
PWR
FORCEOFF
INVALID
CPU
I/O
FORCEON
ISL422XE
MGT
LOGIC
UART
FIGURE 5. CIRCUIT TO PREVENT AUTO POWERDOWN FOR
100ms AFTER FORCED POWERUP
ISL422XE
FORCEOFF
FORCEON
POWER
MASTER POWERDOWN LINE
1M
0.1
µF
MANAGEMENT
UNIT
ISL4221E, ISL4223E


Numéro de pièce similaire - ISL4223EIR

FabricantNo de pièceFiches techniqueDescription
logo
Intersil Corporation
ISL4223EIR INTERSIL-ISL4223EIR Datasheet
415Kb / 13P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kBps, RS-232 Transmitters/Receivers
ISL4223EIR INTERSIL-ISL4223EIR Datasheet
281Kb / 14P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kbps, RS-232 2.7V to 5.5V, 150nA, 250kbps, RS-232
ISL4223EIR INTERSIL-ISL4223EIR Datasheet
279Kb / 14P
   QFN Packaged, ±15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers
May 13, 2010
logo
Renesas Technology Corp
ISL4223EIR RENESAS-ISL4223EIR Datasheet
661Kb / 14P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers
logo
Intersil Corporation
ISL4223EIRZ INTERSIL-ISL4223EIRZ Datasheet
415Kb / 13P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kBps, RS-232 Transmitters/Receivers
More results

Description similaire - ISL4223EIR

FabricantNo de pièceFiches techniqueDescription
logo
Intersil Corporation
ISL3232EIRZ INTERSIL-ISL3232EIRZ Datasheet
279Kb / 14P
   QFN Packaged, ±15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers
May 13, 2010
logo
Renesas Technology Corp
ISL4241E RENESAS-ISL4241E Datasheet
684Kb / 14P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/Receivers
logo
Intersil Corporation
ISL4221E INTERSIL-ISL4221E_07 Datasheet
415Kb / 13P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kBps, RS-232 Transmitters/Receivers
logo
Renesas Technology Corp
ISL3232E RENESAS-ISL3232E Datasheet
661Kb / 14P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers
logo
Intersil Corporation
ISL3232E INTERSIL-ISL3232E Datasheet
281Kb / 14P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kbps, RS-232 2.7V to 5.5V, 150nA, 250kbps, RS-232
ICL3243ECAZ-T INTERSIL-ICL3243ECAZ-T Datasheet
699Kb / 33P
   ±15kV ESD Protected, 3V to 5.5V, 1µA, 250kbps, RS-232 Transmitters/Receivers
February 22, 2010
ISL83220ECV INTERSIL-ISL83220ECV Datasheet
198Kb / 10P
   ±15kV ESD Protected, 3V to 5.5V, 1Microamp, 250kbps, RS-232 Transmitters/Receivers
April 27, 2006
ISL83220E INTERSIL-ISL83220E Datasheet
267Kb / 11P
   /-15kV ESD Protected, 3V to 5.5V, 1Microamp, 250kbps, RS-232 Transmitters/Receivers
RS-232 INTERSIL-RS-232 Datasheet
750Kb / 33P
   ±15kV ESD Protected, 3V to 5.5V, 1µA, 250kbps, RS-232 Transmitters/Receivers
December 9, 2015
ISL3241EIRZ INTERSIL-ISL3241EIRZ Datasheet
681Kb / 16P
   QFN Packaged, ±15kV ESD Protected, 2.7V to 3.6V, 250kbps, RS-232 Transmitters/Receivers with Separate Logic Supply Pin
June 18, 2012
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13


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