MAX3387 Просмотр технического описания (PDF) - Maxim Integrated

Номер в каталоге

Компоненты Описание

Список матч

MAX3387

3V, ±15kV ESD-Protected, AutoShutdown Plus RS-232 Transceiver for PDAs and Cell Phones

Maxim Integrated 

3V, ±15kV ESD-Protected, AutoShutdown Plus

RS-232 Transceiver for PDAs and Cell Phones

Pin Description

PIN

NAME

FUNCTION

1

C1+

Positive Terminal of the Voltage-Doubler Charge-Pump Capacitor

2

V+

+5.5V Supply Generated by the Charge Pump

3

C1-

Negative Terminal of the Voltage-Doubler Charge-Pump Capacitor

4

C2+

Positive Terminal of the Inverting Charge-Pump Capacitor

5

C2-

Negative Terminal of the Inverting Charge-Pump Capacitor

6

V-

-5.5V Generated by the Charge Pump

7

T1IN

TTL/CMOS Transmitter Inputs

8

T2IN

9

INVALID

Output of the Valid Signal Detector. INVALID is high if a valid RS-232 signal is present on

the receiver inputs.

10

T3IN

TTL/CMOS Transmitter Inputs

11

FORCEON

Force-On Input. Drive FORCEON high to override automatic circuitry keeping transmitters

on (FORCEOFF must be high) (Table 1).

12

R3OUT

13

R2OUT

TTL/CMOS Receiver Outputs. Swing between 0V and VL.

14

R1OUT

15

VL

Logic-Level Supply. All CMOS inputs and outputs are referenced to this supply.

16

R3IN

17

R2IN

RS-232 Receiver Inputs

18

R1IN

19

T3OUT

20

T2OUT

RS-232 Transmitter Outputs

21

T1OUT

22

GND

Ground

23

VCC

+3.0V to +5.5V Supply Voltage

24

FORCEOFF

Force-Off Input. Drive FORCEOFF low to shut down transmitters and on-board power sup-

ply. This overrides all automatic circuitry and FORCEON (Table 1).

6 _______________________________________________________________________________________

Share Link: