MAX3225ECUP+

更新时间： 2024-02-25 22:40:31

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MAX3225ECUP+ 数据手册

1µA Supply Current, 1Mbps, 3.0V to 5.5V,

RS-232 Transceivers with AutoShutdown Plus

–7/MAX3245

Pin Description

MAX3224

MAX3225

NAME

FUNCTION

MAX3226 MAX3244

MAX3227 MAX3245

DIP/

SSIP/

TQFN

TSSOP

Ready to Transmit Output, Active High. READY is enabled high when

V- goes below -4V and the device is ready to transmit.

—

READY

C1+

V+

Positive Terminal of Voltage-Doubler Charge-Pump Capacitor

+5.5V Generated By the Charge Pump

C1-

Negative Terminal of Voltage-Doubler Charge-Pump Capacitor

Positive Terminal of Inverting Charge-Pump Capacitor

Negative Terminal of Inverting Charge-Pump Capacitor

-5.5V Generated By the Charge Pump

C2+

C2-

V-

8, 17

9, 16

10, 15

6, 15

7, 14

8, 13

9, 10, 11

4–8

T_OUT

R_IN

R_OUT

RS-232 Transmitter Outputs

RS-232 Receiver Inputs

15–19

TTL/CMOS Transmitter Outputs

Valid Signal Detector Output, Active Low. A logic-high indicates that a

valid RS-232 level is present on a receiver input.

INVALID

12, 13

10, 11

12, 13, 14

T_IN

TTL/CMOS Transmitter Inputs

Force-On Input, Active High. Drive high to override AutoShutdown

FORCEON Plus, keeping transmitters and receivers on (FORCEOFF must be high)

(Table 1).

GND

Ground

+3.0V to +5.5V Single Supply Voltage

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).

FORCEOFF

TTL/CMOS Noninverting Complementary Receiver Outputs. Always

active.

—

R2OUTB

Exposed Paddle. Solder the exposed paddle to the ground, or leave

unconnected.

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.

_______________Detailed Description

Dual Charge-Pump Voltage Converter

The MAX3224–MAX3227/MAX3244/MAX3245’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

The READY output (MAX3224–MAX3227) is low when

the charge pumps are disabled in shutdown mode. The

READY signal asserts high when V- goes below -4V.

LapLink is a trademark of Traveling Software.

_______________________________________________________________________________________

1...4 5 678 9 10...20

中文翻译

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MAX3225ECUP+ 替代型号

型号	品牌	替代类型	描述	数据表
SP3222ECY-L/TR	EXAR	类似代替	True 3.0V to 5.5V RS-232 Transceivers

与MAX3225ECUP+相关器件

型号	品牌	描述	获取价格	数据表
MAX3225ECUP+T	MAXIM	Line Transceiver, 2 Func, 2 Driver, 2 Rcvr, BICMOS, PDSO20, 4.40 MM, MO-153AC, TSSOP-20	获取价格
MAX3225ECUP-T	MAXIM	Line Transceiver, 2 Func, 2 Driver, 2 Rcvr, BICMOS, PDSO20, 4.40 MM, MO-153AC, TSSOP-20	获取价格
MAX3225EEAP	MAXIM	【15kV ESD-Protected, 1レA, 1Mbps, 3.0V to 5.5V	获取价格
MAX3225EEAP+	MAXIM	Line Transceiver, 2 Func, 2 Driver, 2 Rcvr, BICMOS, PDSO20, 5.30 MM, ROHS COMPLIANT, MO-15	获取价格
MAX3225EEAP+T	MAXIM	Line Transceiver, 2 Func, 2 Driver, 2 Rcvr, BICMOS, PDSO20, 5.30 MM, ROHS COMPLIANT, MO-15	获取价格
MAX3225EEPP	MAXIM	【15kV ESD-Protected, 1レA, 1Mbps, 3.0V to 5.5V	获取价格

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