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參數(shù)資料
| 型號： | ICL3310EIB |
| 廠商： | INTERSIL CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | SNAP 4-Ch 180-280 VAC Digital Input Module, Factory Mutual approved |
| 中文描述： | DUAL LINE TRANSCEIVER, PDSO18 |
| 封裝： | PLASTIC, MS-013-AB, SOIC-18 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大小： | 351K |
| 代理商： | ICL3310EIB |
5
All the receivers convert RS-232 signals to CMOS output
levels and accept inputs up to
±
30V while presenting the
required 3k
to 7k
input impedance (see Figure 1) even if
the power is off (V
CC
= 0V). The receivers’ Schmitt trigger
input stage uses hysteresis to increase noise immunity and
decrease errors due to slow input signal transitions.
Low Power Operation
This 3V device requires a nominal supply current of 0.3mA,
even at V
CC
= 5.5V, during normal operation (not in
powerdown mode). This is considerably less than the 11mA
current required by comparable 5V RS-232 devices, allowing
users to reduce system power simply by replacing the old
style device with the ICL3310E.
Low Power, Pin Compatible Replacement
Pin compatibility with existing 5V products (e.g., MAX222),
coupled with the wide operating supply range, make the
ICL3310E a potential lower power, higher performance drop-
in replacement for existing 5V applications. As long as the
±
5V RS-232 output swings are acceptable, and transmitter
pull-up resistors aren’t required, the ICL3310E should work
in most 5V applications.
When replacing a device in an existing 5V application, it is
acceptable to terminate C
3
to V
CC
as shown on the “Typical
Operating Circuit”. Nevertheless, terminate C
3
to GND if
possible, as slightly better performance results from this
configuration.
Powerdown Functionality
The already low current requirement drops significantly
when the device enters powerdown mode. In powerdown,
supply current drops to 1
μ
A, because the on-chip charge
pump turns off (V+ collapses to V
CC
, V- collapses to GND),
and the transmitter and receiver outputs three-state. This
micro-power mode makes these devices ideal for battery
powered and portable applications.
Software Controlled (Manual) Powerdown
The ICL3310E may be forced into its low power, standby
state via a simple shutdown (SHDN) pin (see Figure 4).
Driving this pin high enables normal operation, while driving
it low forces the IC into it’s powerdown state. The time
required to exit powerdown, and resume transmission is less
than 50
μ
s. Connect SHDN to V
CC
if the powerdown function
isn’t needed.
R
XOUT
GND
≤
V
ROUT
≤
V
CC
5k
R
XIN
-25V
≤
V
RIN
≤
+25V
GND
V
CC
FIGURE 1. INVERTING RECEIVER CONNECTIONS
FIGURE 2. POWER DRAIN THROUGH POWERED DOWN
PERIPHERAL
OLD
V
CC
POWERED
DOWN
UART
GND
SHDN = GND
V
CC
Rx
Tx
V
CC
CURRENT
FLOW
V
OUT
=
V
CC
RS-232 CHIP
FIGURE 3. DISABLED RECEIVERS PREVENT POWER DRAIN
ICL3310E
TRANSITION
DETECTOR
R
X
T
X
V
CC
V
CC
TO
V
OUT
=
HI-Z
WAKE-UP
LOGIC
POWERED
DOWN
UART
V-
ICL3310E
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PDF描述 |
|---|---|
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICL3310EIB-T | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:+/- 15kV ESD Protected, +3V to +5.5V, 1 Microamp, 250kbps, RS-232 Transmitter/Receiver |
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| ICL3310IB-T | 制造商:Rochester Electronics LLC 功能描述:RS232 3V 2D/2R SHUTDOWN 18SOIC IND (TAPE&REEL) - Tape and Reel 制造商:Intersil Corporation 功能描述: |
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