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

X  

ISL4244EIR-T Fiches technique(PDF) 9 Page - Intersil Corporation

No de pièce ISL4244EIR-T
Description  QFN Packaged, ±15kV ESD Protected, 2.7V to 5.5V, 10Nanoamp, 250kbps/ 1Mbps, RS-232 Transceivers with Enhanced Automatic Power-down
Download  17 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  INTERSIL [Intersil Corporation]
Site Internet  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL4244EIR-T Fiches technique(HTML) 9 Page - Intersil Corporation

Back Button ISL4244EIR-T Datasheet HTML 5Page - Intersil Corporation ISL4244EIR-T Datasheet HTML 6Page - Intersil Corporation ISL4244EIR-T Datasheet HTML 7Page - Intersil Corporation ISL4244EIR-T Datasheet HTML 8Page - Intersil Corporation ISL4244EIR-T Datasheet HTML 9Page - Intersil Corporation ISL4244EIR-T Datasheet HTML 10Page - Intersil Corporation ISL4244EIR-T Datasheet HTML 11Page - Intersil Corporation ISL4244EIR-T Datasheet HTML 12Page - Intersil Corporation ISL4244EIR-T Datasheet HTML 13Page - Intersil Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 17 page
background image
9
FN8038.5
May 13, 2010
GND for the best performance. ISL4238E transmitter inputs
incorporate an active positive feedback resistor that
maintains the last input state in the absence of a forcing
signal, so unused transmitter inputs may be left
unconnected.
Receivers
ISL4238E, ISL4244E, ISL4245 devices contain standard
inverting receivers which can tristate via the FORCEOFF
control line. Additionally, they include a noninverting
(monitor) receiver (denoted by the ROUTB label) that is
always active, regardless of the state of any control lines.
Both receiver types convert RS-232 signals to CMOS output
levels and accept inputs up to ±25V while presenting the
required 3k
Ω to 7kΩ input impedance (see Figure 1) even if
the power is off (VCC = 0V). The receivers’ Schmitt trigger
input stage uses hysteresis to increase noise immunity and
decrease errors due to slow input signal transitions.
The ISL4238E, ISL4244E, ISL4245 inverting receivers
disable during forced (manual) power-down, but not during
automatic power-down (see Table 2). Conversely, the
monitor receiver remains active even during manual power-
down making it extremely useful for Ring Indicator
monitoring. Standard receivers driving powered down
peripherals must be disabled to prevent current flow through
the peripheral’s protection diodes (see Figures 2 and 3). This
renders them useless for wake up functions, but the
corresponding monitor receiver can be dedicated to this task
as shown in Figure 3.
Low Power Operation
These 3V devices require a nominal supply current of
0.3mA, even at VCC = 5.5V, during normal operation (not in
power-down mode). This is considerably less than the 5mA
to 11mA current required by comparable 5V RS-232 devices,
allowing users to reduce system power simply by switching
to this new family.
TABLE 2. POWER-DOWN LOGIC TRUTH TABLE
RCVR OR
XMTR
EDGE
WITHIN 30
SEC?
FORCEOFF
INPUT
FORCEON
INPUT
TRANSMITTER
OUTPUTS
RECEIVER
OUTPUTS
ROUTB
OUTPUTS
RS-232
LEVEL
PRESENT
AT
RECEIVER
INPUT?
INVALID
OUTPUT
MODE OF OPERATION
NO
H
H
Active
Active
Active
No
L
Normal Operation (Enhanced
Auto Power-down Disabled)
NO
H
H
Active
Active
Active
Yes
H
YES
H
L
Active
Active
Active
No
L
Normal Operation (Enhanced
Auto Power-down Enabled)
YES
H
L
Active
Active
Active
Yes
H
NO
H
L
High-Z
Active
Active
No
L
Power-down Due to Enhanced
Auto Power-down Logic
NO
H
L
High-Z
Active
Active
Yes
H
X
L
X
High-Z
High-Z
Active
No
L
Manual Power-down
X
L
X
High-Z
High-Z
Active
Yes
H
INVALID DRIVING FORCEON AND FORCEOFF (EMULATES AUTOMATIC POWER-DOWN)
X
Note 8
Note 8
Active
Active
Active
Yes
H
Normal Operation
X
Note 8
Note 8
High-Z
High-Z
Active
No
L
Forced Auto Power-down
NOTE:
8. Input is connected to INVALID Output.
RXOUT
GND
≤ VROUT ≤ VCC
5k
Ω
RXIN
-25V
≤ VRIN ≤ +25V
GND
VCC
FIGURE 1. INVERTING RECEIVER CONNECTIONS
FIGURE 2. POWER DRAIN THROUGH POWERED DOWN
PERIPHERAL
OLD
VCC
POWERED
GND
SHDN = GND
VCC
Rx
Tx
VCC
CURRENT
VOUT = VCC
FLOW
RS-232 CHIP
DOWN
UART
ISL4238E, ISL4244E, ISL4245E


Numéro de pièce similaire - ISL4244EIR-T

FabricantNo de pièceFiches techniqueDescription
logo
Intersil Corporation
ISL4244EIR-T INTERSIL-ISL4244EIR-T Datasheet
291Kb / 17P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 10Nanoamp, 250kbps/1Mbps, RS-232 Transceivers with Enhanced Automatic Power-down
logo
Renesas Technology Corp
ISL4244EIR-T RENESAS-ISL4244EIR-T Datasheet
783Kb / 17P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 10Nanoamp, 250kbps/ 1Mbps, RS-232 Transceivers with Enhanced Automatic Power-down
More results

Description similaire - ISL4244EIR-T

FabricantNo de pièceFiches techniqueDescription
logo
Renesas Technology Corp
ISL4238E RENESAS-ISL4238E Datasheet
783Kb / 17P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 10Nanoamp, 250kbps/ 1Mbps, RS-232 Transceivers with Enhanced Automatic Power-down
logo
Intersil Corporation
ISL4238E INTERSIL-ISL4238E Datasheet
291Kb / 17P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 10Nanoamp, 250kbps/1Mbps, RS-232 Transceivers with Enhanced Automatic Power-down
ISL4241E INTERSIL-ISL4241E Datasheet
266Kb / 14P
   QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 10Nanoamp, 250kbps, 2.7V to 5.5V, 10Nanoamp, 250kbps,
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
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
ISL4221E INTERSIL-ISL4221E Datasheet
401Kb / 13P
   QFN Packaged, /-15kV ESD Protected, 2.7V to 5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers
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
ICL3224E INTERSIL-ICL3224E Datasheet
458Kb / 19P
   15kV ESD Protected, 3V to 5.5V, 1Microamp, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown
logo
Renesas Technology Corp
ICL3224E RENESAS-ICL3224E Datasheet
852Kb / 20P
   /-15kV ESD Protected, 3V to 5.5V, 1Microamp, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown
logo
Intersil Corporation
ICL3227E INTERSIL-ICL3227E Datasheet
383Kb / 19P
   -15kV ESD Protected, 3V to 5.5V, 1Microamp, 1Mbps, RS-232 Transceivers with Enhanced Automatic Powerdown
More results


Html Pages

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


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