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參數(shù)資料
| 型號： | ICL3222E |
| 廠商： | Intersil Corporation |
| 英文描述： | ±15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transmitters/Receivers(±15kV ESD 防護(hù), +3V至+5.5V, 1微安, 250kbps, RS-232收發(fā)器) |
| 中文描述： | ± 15kV的ESD保護(hù)，3V至5.5V，1Microamp，250kbps的和RS - 232發(fā)送器/接收器（± 15kV的ESD防護(hù)，采用3V至5.5V的，1微安，250kbps的，RS - 232接口收發(fā)器） |
| 文件頁數(shù)： | 12/28頁 |
| 文件大?。?/td> | 562K |
| 代理商： | ICL3222E |
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12
FN4910.19
June 22, 2007
Software Controlled (Manual) Powerdown
Most devices in the ICL32xxE family provide pins that allow
the user to force the IC into the low power, standby state.
On the ICL3222E and ICL3241E, the powerdown control is
via a simple shutdown (SHDN) pin. Driving this pin high
enables normal operation, while driving it low forces the IC
into its powerdown state. Connect SHDN to V
CC
if the
powerdown function isn’t needed. Note that all the receiver
outputs remain enabled during shutdown (see Table 2). For
the lowest power consumption during powerdown, the
receivers should also be disabled by driving the EN input
high (see next section, and Figures 2 and 3).
The ICL3221E, ICL3223E, and ICL3243E utilize a two pin
approach where the FORCEON and FORCEOFF inputs
determine the IC’s 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. ICL3243E inverting (standard) receiver outputs also
disable when the device is in manual powerdown, thereby
eliminating the possible current path through a shutdown
peripheral’s input protection diode (see Figures 2 and 3).
TABLE 2. POWERDOWN AND ENABLE LOGIC TRUTH TABLE
RS-232
SIGNAL
PRESENT
AT
RECEIVER
INPUT
FORCEOFF
OR SHDN
INPUT
FORCEON
INPUT
EN
INPUT
TRANSMITTER
OUTPUTS
RECEIVER
OUTPUTS
R
OUTB
OUTPUTS
(NOTE 4)
INVALID
OUTPUT
MODE OF OPERATION
ICL3222E, ICL3241E
N/A
L
N/A
L
High-Z
Active
Active
N/A
Manual Powerdown
N/A
L
N/A
H
High-Z
High-Z
Active
N/A
Manual Powerdown with Receiver
Disabled
N/A
H
N/A
L
Active
Active
Active
N/A
Normal Operation
N/A
H
N/A
H
Active
High-Z
Active
N/A
Normal Operation withReceiver
Disabled
ICL3221E, ICL3223E
No
H
H
L
Active
Active
N/A
L
Normal Operation
(Auto Powerdown Disabled)
No
H
H
H
Active
High-Z
N/A
L
Yes
H
L
L
Active
Active
N/A
H
Normal Operation
(Auto Powerdown Enabled)
Yes
H
L
H
Active
High-Z
N/A
H
No
H
L
L
High-Z
Active
N/A
L
Powerdown Due to Auto Powerdown
Logic
No
H
L
H
High-Z
High-Z
N/A
L
Yes
L
X
L
High-Z
Active
N/A
H
Manual Powerdown
Yes
L
X
H
High-Z
High-Z
N/A
H
Manual Powerdown with Receiver
Disabled
No
L
X
L
High-Z
Active
N/A
L
Manual Powerdown
No
L
X
H
High-Z
High-Z
N/A
L
Manual Powerdown with Receiver
Disabled
ICL3243E
No
H
H
N/A
Active
Active
Active
L
Normal Operation
(Auto Powerdown Disabled)
Yes
H
L
N/A
Active
Active
Active
H
Normal Operation
(Auto Powerdown Enabled)
No
H
L
N/A
High-Z
Active
Active
L
Powerdown Due to Auto Powerdown
Logic
Yes
L
X
N/A
High-Z
High-Z
Active
H
Manual Powerdown
No
L
X
N/A
High-Z
High-Z
Active
L
Manual Powerdown
NOTE:
4. Applies only to the ICL3241E and ICL3243E.
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICL3243E | ±15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transmitters/Receivers(±15kV ESD 防護(hù), +3V至+5.5V, 1微安, 250kbps, RS-232收發(fā)器) |
| ICL3224 | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| ICL3238 | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| ICL3226 | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| ICL3225E | ±15kV ESD Protected, +3V to +5.5V, 1Microamp, 1Mbps, RS-232 Transceivers with Enhanced Automatic Powerdown(±15kV ESD 防護(hù), +3V至+5.5V, 1微安, 1Mbps, RS-232收發(fā)器，具有增強(qiáng)型自動(dòng)關(guān)斷功能) |
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