- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383361 > MAX3233E (Maxim Integrated Products, Inc.) 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors PDF資料下載
參數(shù)資料
| 型號： | MAX3233E |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | RS-232 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | 5V的高速RS - 232收發(fā)器與0.1uF電容 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大小： | 144K |
| 代理商： | MAX3233E |
_______________Detailed Desc ription
Dual Charge-Pump V oltage Converter
The MAX3233E/MAX3235E’s internal power supply
consists of a regulated dual charge pump that provides
output voltages of +5.5V (doubling charge pump) and
-5.5V (inverting charge pump), with no external capaci-
tors. The charge pump operates in discontinuous
mode: if the output voltages are less than 5.5V, the
charge pump is enabled; if the output voltages exceed
5.5V, the charge pump is disabled.
RS -232 T ransmitters
The transmitters are inverting level translators that
convert CMOS-logic levels to 5.0V EIA/TIA-232 levels.
The devices guarantee a 250kbps data rate with worst-
case loads of 3k
in parallel with 1000pF, providing
compatibility with PC-to-PC communication software
(such as LapLink). Transmitters can be paralleled to
drive multiple receivers. Figure 1 shows a complete
system connection.
When
FORCEOFF
is driven to ground or when the Auto-
Shutdown Plus circuitry senses that all receiver and
transmitter inputs are inactive for more than 30sec, the
transmitters are disabled and the outputs go into a high-
impedance state. When powered off or shut down, the
outputs can be driven to ±12V. The transmitter inputs
do not have pull-up resistors. Connect unused inputs to
GND or V
CC
.
RS -232 Rec eivers
The receivers convert RS-232 signals to CMOS-logic
output levels. They feature inverting outputs that always
remain active (Table 1).
The MAX3233E/MAX3235E feature an
INVALID
output
that is enabled low when no valid RS-232 voltage levels
have been detected on all receiver inputs. Because
INVALID
indicates the receiver input’s condition, it is
independent of FORCEON and
FORCEOFF
states
(Figures 2 and 3).
AutoS hutdown Plus Mode
The devices achieve a1μA supply current with Maxim’s
AutoShutdown Plus feature, which operates when
FORCEOFF
is high and a FORCEON is low. When these
devices do not sense a valid signal transition on any
receiver or transmitter input for 30sec, the on-board
charge pumps are shut down, reducing supply current
to 1μA. This occurs if the RS-232 cable is disconnected,
or if the connected peripheral transmitters are turned off
and the UART driving the transmitter inputs is inactive.
The system turns on again when a valid transition is
M
±15kV ESD-Protected, 1μA, 250kbps, 3.3V/5V, Dual
RS -232 Transc eivers with Internal Capac itors
6
_______________________________________________________________________________________
MAX3233E
MAX3235E
I/O
CHIP
WITH
UART
CPU
RS-232
POWER-
MANAGEMENT
UNIT OR
KEYBOARD
CONTROLLER
FORCEOFF
FORCEON
INVALID
Figure 1. Interface Under Control of PMU
LapLink is a trademark of Traveling Software.
+0.3V
-0.3V
INVALID
R_IN
INVALID ASSERTED IF ALL RECEIVER INPUTS ARE BETWEEN +0.3V AND -0.3V FOR
AT LEAST
80
μ
s.
80μs
TIMER
R
+2.7V
-2.7V
INVALID
R_IN
INVALID DEASSERTED IF ANY RECEIVER INPUT HAS BEEN ABOVE +2.7V OR BELOW
-2.7V FOR 1
μ
s.
80μs
TIMER
R
Figure 2a.
INVALID
Functional Diagram,
INVALID
Low
Figure 2b.
INVALID
Functional Diagram,
INVALID
High
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX3233E-MAX3235E | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| MAX3235E | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| MAX3235EEWP | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| MAX3233ECWP | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| MAX3235ECWP | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3233ECPP | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3233ECPP+G36 | 功能描述:RS-232接口集成電路 3.3V/5V Dual Transceiver RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3233ECWP | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3233ECWP+ | 制造商:Maxim Integrated Products 功能描述:Dual Transmitter/Receiver RS-232 20-Pin SOIC W 制造商:Maxim Integrated Products 功能描述:Dual Transmitter/Receiver RS-232 20-Pin SOIC W Bulk |
| MAX3233ECWP+G36 | 功能描述:RS-232接口集成電路 3.3V/5V Dual Transceiver RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。