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參數(shù)資料
| 型號(hào)： | MAX3322EEUP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 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： | 4.40 MM, MO-153AC, TSSOP-20 |
| 文件頁(yè)數(shù)： | 6/13頁(yè) |
| 文件大?。?/td> | 329K |
| 代理商： | MAX3322EEUP |
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M
Dual Charge-Pump Voltage Converter
The MAX3322E/MAX3323Es
’
internal power supply con-
sists of a regulated dual charge pump that provides out-
put voltages of +5.5V (doubling charge pump) and
-5.5V (inverting charge pump), regardless of the input
voltage (V
CC
), over a +3.0V to +5.5V range. The charge
pumps operate in a discontinuous mode: if the output
voltages are less than 5.5V, the charge pumps are
enabled; if the output voltages exceed 5.5V, the charge
pumps are disabled. Each charge pump requires a fly-
LapLink is a trademark of Traveling Software.
ing capacitor (C1, C2) and reservoir capacitor (C3, C4)
to generate the V+ and V- supplies. Because supply
voltages can vary from +3V up to +5.5V, the selection
of the capacitor values depends on the V
CC
value.
Table 2 shows minimum capacitor values.
RS-232 Transmitters
The transmitters are inverting level translators that con-
vert CMOS-logic levels to 5.0V EIA/TIA-232 levels. The
transmitters are enabled or disabled (three-stated) by
the logic control TXENABLE, which manages transmis-
sion-line sharing in multidrop applications. When
TXENABLE is high, the transmitter is enabled. When
TXENABLE is low, the transmitter is put in a high-
impedance state (see Table 1).
The MAX3322E/MAX3323Es
’
transmitters guarantee a
250kbps data rate with worst-case loads of 3k
in par-
allel with 1000pF, providing compatibility with PC-to-PC
communication software (such as LapLink
).
Transmitters can be paralleled to drive multiple
receivers or mice. Figure 3 shows a complete system
connection.
RS-232 Receivers
MAX3322E/MAX3323E receivers convert RS-232 sig-
nals to CMOS-logic output levels. The unique feature of
the receivers is the switchable input resistance. The
receiver input resistance can be 5k
or high imped-
ance. These two conditions are selectable by the logic
control RENABLE. When RENABLE is high, the 5k
resistor is connected across the receiver input and
ground. When RENABLE is low, the receiver input is
high impedance, maintaining receiving capability. This
feature permits the design of multidrop applications,
which observe RS-232 interface standards.
±15kV ESD-Protected, RS-232 Transceivers for
Multidrop Applications
6
_______________________________________________________________________________________
INPUT
OUTPUT
+3V
V+
0V
V-
0V
t
PLH
t
PHL
Figure 1. Transmitter Propagation-Delay Timing
t
PHL
t
PLH
50%
GND
V
CC
50%
+3V
50%
INPUT
OUTPUT
0V
50%
Figure 2. Receiver Propagation-Delay Timing
MAX3322E
I/O
CHIP
WITH
UART
I/O
CHIP
POWER SUPPLY
V
L
V
L
CPU
RS-232
POWER-
MANAGEMENT
UNIT OR
KEYBOARD
CONTROLLER
SHDN
SHDN
Figure 3. Interface Under Control of PMU
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX3322E | Octal LVDS Receiver 38-TSSOP -40 to 85 |
| MAX3323EEPE | Octal LVDS Receiver 38-TSSOP -40 to 85 |
| MAX3323EEUE | Octal LVDS Receiver 38-TSSOP -40 to 85 |
| MAX332 | 16-Channel LVDS Receiver 64-TSSOP -40 to 85 |
| MAX332MJE | Octal LVDS Transmitter 38-TSSOP -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3322EEUP+ | 功能描述:RS-232接口集成電路 Transceiver For Multidrop Aps 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: |
| MAX3322EEUP+T | 功能描述:RS-232接口集成電路 Transceiver For Multidrop Aps 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: |
| MAX3322EEUP-T | 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: |
| MAX3323EEPE | 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: |
| MAX3323EEPE+ | 功能描述:RS-232接口集成電路 Transceiver For Multidrop Aps 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: |
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