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參數(shù)資料
| 型號： | ISL83384EIA |
| 廠商： | INTERSIL CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | DUAL LINE TRANSCEIVER, PDSO20 |
| 封裝： | PLASTIC, MO-150AE, SSOP-20 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 289K |
| 代理商： | ISL83384EIA |
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 ISL83384E.
Low Power, Pin Compatible Replacement
Pin compatibility with existing 5V products (e.g., MAX222),
coupled with the wide operating supply range, make the
ISL83384E 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 ISL83384E
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 ISL83384E 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
ISL83384E
TRANSITION
DETECTOR
R
X
T
X
V
CC
V
CC
TO
V
OUT
=
HI-Z
WAKE-UP
LOGIC
POWERED
DOWN
UART
V-
FIGURE 4. CONNECTIONS FOR MANUAL POWERDOWN
PWR
MGT
LOGIC
SHDN
CPU
I/O
ISL83384E
UART
ISL83384E
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL83384EIA-T | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| ISL83385ECB-T | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| ISL83385ECA-T | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| ISL83385E | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| ISL83385ECA | Octal Bus Transceivers With 3-State Outputs 20-TSSOP -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL83384EIA-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 |
| ISL83384EIB | 制造商:Rochester Electronics LLC 功能描述:RS232 3V 2D/2R 15KV SHUTDOWN 18SOIC IND - Bulk |
| ISL83385 WAF | 制造商:Intersil Corporation 功能描述: |
| ISL83385CA | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ISL83385CB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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