參數(shù)資料
型號(hào)： MAX3225E
廠商： Maxim Integrated Products, Inc.
英文描述： ±15kV ESD-Protected, 1μA, 1Mbps, 3.0V to 5.5V,RS-232 Transceivers with AutoShutdown Plus(±15kV ESD保護(hù),1μA, 1Mbps, 3.0V至5.5V,帶自動(dòng)關(guān)斷功能，RS-232收發(fā)器（2收2發(fā)）)
中文描述： ±15kV ESD保護(hù)、1µA、1Mbps、3.0V至5.5V、RS-232收發(fā)器，提供AutoShutdown Plus
文件頁(yè)數(shù)： 7/20頁(yè)
文件大?。?/td> 428K
代理商： MAX3225E
_______________Detailed Description
Dual Charge-Pump Voltage Converter
The MAX3224E
–
MAX3227E/MAX3244E/MAX3245E
’
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), over the +3.0V to +5.5V range. 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. Each charge pump requires
a flying capacitor (C1, C2) and a reservoir capacitor
(C3, C4) to generate the V+ and V- supplies.
The READY output (MAX3224E
–
MAX3227E) is low
when the charge pumps are disabled in shutdown
mode. The READY signal asserts high when V- goes
below -4V.
RS-232 Transmitters
The transmitters are inverting level translators that
convert CMOS-logic levels to 5.0V EIA/TIA-232 levels.
The MAX3224E/MAX3226E/MAX3244E guarantee a
250kbps data rate (1Mbps, for the MAX3225E/MAX3227E/
MAX3245E) with worst-case loads of 3k
in parallel with
1000pF, providing compatibility with PC-to-PC com-
munication software (such as LapLink
). Transmitters
M
±15kV ESD-Protected, 1μA, 1Mbps, 3.0V to 5.5V,
RS-232 Transceivers with AutoShutdown Plus
_______________________________________________________________________________________
7
PIN
NAME
MAX3224E
MAX3225E
MAX3226E
MAX3227E
MAX3244E
MAX3245E
1
1
—
READY
2
2
28
C1+
Positive Terminal of Voltage-Doubler Charge-Pump Capacitor
3
3
27
V+
+5.5V generated by the charge pump
4
4
24
C1-
Negative Terminal of Voltage-Doubler Charge-Pump Capacitor
5
5
1
C2+
Positive Terminal of Inverting Charge-Pump Capacitor
6
6
2
C2-
Negative Terminal of Inverting Charge-Pump Capacitor
7
7
3
V-
-5.5V generated by the charge pump
8, 17
13
9
–
11
T_OUT
RS-232 Transmitter Outputs
9, 16
8
4
–
8
R_IN
RS-232 Receiver Inputs
10, 15
9
15
–
19
R_OUT
TTL/CMOS Receiver Outputs
11
10
21
INVALID
Valid Signal Detector Output, active low. A logic high indicates that a valid
RS-232 level is present on a receiver input.
12, 13
11
12
–
14
T_IN
TTL/CMOS Transmitter Inputs
14
12
23
FORCEON
Force-On Input, active high. Drive high to override AutoShutdown Plus,
keeping transmitters and receivers on (
FORCEOFF
must be high) (Table 1).
18
14
25
GND
Ground
19
15
26
V
CC
+3.0V to +5.5V Single Supply Voltage
20
16
22
FORCEOFF
Force-Off Input, active low. Drive low to shut down transmitters, receivers
(except R2OUTB), and charge pump. This overrides AutoShutdown Plus
and FORCEON (Table 1).
—
—
20
R2OUTB
TTL/CMOS Noninverting Complementary Receiver Outputs. Always active.
Ready to Transmit Output, active-high. READY is enabled high when
V- goes below -4V and the device is ready to transmit.
FUNCTION
______________________________________________________________ Pin Description
LapLink is a trademark of Traveling Software.
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參數(shù)描述
MAX3225EAAP 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:
MAX3225EAAP+ 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:
MAX3225EAAP+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:
MAX3225EAAP-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:
MAX3225EAP 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:
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