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MAX232ECPE

Dual RS-232 driver/receiver, 5V to +/-10V, charge pump, 16-PDIP

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Pieza del fabricante：

MAX232ECPE

Paquete：

16-PDIP

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Descripción

Productos

The MAX232ECPE from Analog Devices (Maxim Integrated) is a dual RS-232 driver/receiver that converts between 5V TTL/CMOS logic levels and RS-232 (+/-10V) levels. With an internal charge pump generating +/-10V from a single 5V supply, it requires only 4 external capacitors. Packaged in 16-PDIP.

Especificaciones

Drivers 2 (TTL to RS-232)
Receivers 2 (RS-232 to TTL)
Tensión de alimentación 5V (single supply)
RS-232 Output Voltage +/-9V (typ with 5V supply)
Velocidad de datos 120kbps (guaranteed)
ESD Protection +/-15kV HBM on RS-232 pins
External Capacitors 4 x 1uF (required for charge pump)
Paquete 16-PDIP
Temperatura de funcionamiento -40 to +85 C

Características

  • 2 drivers + 2 receivers in one package
  • Internal charge pump: 5V to +/-10V
  • Only 4 external capacitors needed
  • +/-15kV ESD protection on RS-232 pins
  • 120kbps data rate
  • Industry-standard RS-232 interface IC

Aplicaciones

  • MCU RS-232 serial communication
  • PC serial port interface
  • Industrial RS-232 communication
  • Modem and terminal interfaces

The MAX232ECPE from Analog Devices (Maxim Integrated) is the industry-standard dual RS-232 driver/receiver that converts between 5V TTL/CMOS logic levels and RS-232 voltage levels (+/-9V typical). The internal charge pump doubles and inverts the 5V supply to generate approximately +/-10V, requiring only 4 external 1uF capacitors for operation. Two drivers convert TTL transmit signals to RS-232 levels, and two receivers convert RS-232 receive signals to TTL levels. The E version provides +/-15kV ESD protection on the RS-232 pins, exceeding the IEC 1000-4-2 requirements. The 120kbps guaranteed data rate supports all standard RS-232 baud rates up to 115.2kbps. The MAX232 is the most recognized RS-232 interface IC and has been the default choice for MCU serial communication since its introduction in 1987.

The MAX232ECPE uses a dual charge pump to generate the positive and negative supply voltages required for RS-232 transmission. The first charge pump (voltage doubler) uses C1 to charge to VCC during one half-cycle and then stacks this voltage on top of VCC during the other half-cycle, producing V+ = 2 x VCC = approximately 10V. The second charge pump (voltage inverter) uses C2 to charge from V+ to ground, then connects C2 between V+ and the V- output, producing V- = approximately -10V. These generated voltages power the two RS-232 drivers. Each driver is an inverting level shifter: a TTL HIGH input produces a negative RS-232 output (approximately -9V), and a TTL LOW input produces a positive RS-232 output (approximately +9V). The receivers are inverting comparators with 0.8V/2.4V thresholds per RS-232 specifications.

Pin Nombre Función
1 C1+ Charge pump capacitor 1 positive
2 V+ +10V generated output (charge pump)
3 C1- Charge pump capacitor 1 negative
4 C2+ Charge pump capacitor 2 positive
5 C2- Charge pump capacitor 2 negative
6 V- -10V generated output (charge pump)
7 T2OUT RS-232 driver 2 output
8 R2IN RS-232 receiver 2 input
9 R2OUT TTL receiver 2 output
10 T2IN TTL driver 2 input
11 T1IN TTL driver 1 input
12 R1OUT TTL receiver 1 output
13 R1IN RS-232 receiver 1 input
14 T1OUT RS-232 driver 1 output
15 GND Suelo
16 VCC +5V supply
  • MCU UART to RS-232 serial port conversion with 5V-only supply
  • PC serial port interface with +/-15kV ESD protection
  • Industrial RS-232 communication at up to 120kbps with charge pump
  • Modem and terminal interface with 2 drivers + 2 receivers
Modelo Fabricante Diferencia clave
MAX233 ADI No external capacitors (internal charge pump caps)
ST232BD ST Pin-compatible, 3.3V tolerant inputs
HIN232CP Intersil/Renesas Pin-compatible, lower cost
SP3232EBCP MaxLinear 3.3V version, pin-compatible
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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