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MAX3232IDR


Dual RS-232 driver/receiver, 250kbps, +/-15kV ESD, SOIC-16

12500

有效库存
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制造商零件:

MAX3232IDR

包装:

SOIC-16 (9.9 x 3.9 x 1.5 mm)

品牌:
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说明

产品概览

The MAX3232IDR from Texas Instruments is a 3V to 5.5V dual-channel RS-232 line driver/receiver with +/-15kV ESD protection, operating up to 250kbps in SOIC-16 package.

主要规格

Standard TIA/EIA-232-F
Drivers / Receivers 2 / 2
数据速率 250 kbps
电源电压 3V to 5.5V
Supply Current 300 uA typical
ESD Protection +/-15 kV HBM on bus pins
External Capacitors 4 x 0.1uF
Output Voltage Swing +/-5.4V typical
压摆率 6 to 30 V/us
包装 SOIC-16 (D suffix)
工作温度 -40 to +85 C

特点

  • +/-15kV HBM ESD protection on all RS-232 bus pins
  • Operates from single 3V to 5.5V supply with dual charge pump
  • Only 4 external 0.1uF capacitors required
  • Accepts 5V logic input with 3.3V supply
  • 300uA low supply current for battery-powered systems

应用

  • Battery-powered RS-232 serial communication
  • PDAs, notebooks, and handheld equipment
  • Industrial RS-232 interface conversion
  • Embedded system debug UART
  • Point-of-sale terminal serial port

The MAX3232IDR from Texas Instruments is a 3V to 5.5V multichannel RS-232 line driver and receiver with +/-15kV ESD HBM protection on all bus pins. The device consists of two line drivers, two line receivers, and a dual charge-pump circuit. The charge pump and four small 0.1uF external capacitors allow operation from a single 3V to 5.5V supply, generating the +/-5.4V output swing required by the RS-232 standard. The device meets TIA/EIA-232-F requirements and operates at data rates up to 250kbps with 30V/us maximum slew rate. The IDR suffix denotes SOIC-16 package with industrial temperature range and tape and reel packaging.

The MAX3232IDR operates as a dual RS-232 transceiver. (1) The internal dual charge pump generates +5.4V (V+) and -5.4V (V-) from the 3V to 5.5V VCC supply using four external 0.1uF capacitors. C1 and C2 form the voltage doublers that generate V+ and V- respectively. These generated rails power the RS-232 driver outputs, producing the +/-5.4V swing required by the TIA/EIA-232-F standard. (2) Each driver converts a TTL/CMOS logic input (0 to VCC) to an RS-232 output level. The driver inverts the signal: a logic low input produces a positive RS-232 output (space), and a logic high input produces a negative RS-232 output (mark). The slew rate is limited to 30V/us maximum to comply with RS-232 specifications and reduce EMI. (3) Each receiver converts an RS-232 input (+/-15V range) to a TTL/CMOS logic output. The receiver threshold has built-in hysteresis (0.3V typical) for noise immunity. The +/-15kV ESD protection on bus pins uses clamping diodes to protect the internal circuitry from electrostatic discharge events.

针脚 名称 功能
1 C1+ Charge pump capacitor C1 positive
2 V+ Charge pump output (+5.4V)
3 C1- Charge pump capacitor C1 negative
4 C2+ Charge pump capacitor C2 positive
5 C2- Charge pump capacitor C2 negative
6 V- Charge pump output (-5.4V)
7-8 DOUT2, DOUT1 Driver outputs (RS-232)
9-10 RIN2, RIN1 Receiver inputs (RS-232)
11-12 R1OUT, R2OUT Receiver outputs (TTL)
13-14 DIN1, DIN2 Driver inputs (TTL)
15 接地 地面
16 VCC Power supply (3-5.5V)
  • Battery-powered RS-232 serial communication in PDAs and handhelds
  • Industrial RS-232 interface conversion from 3.3V/5V logic
  • Embedded system debug UART with +/-15kV ESD protection
  • Point-of-sale terminal serial port with dual charge pump
  • Notebook and laptop serial port with minimal external components
模型 制造商 主要区别
MAX3232EIDR TI +/-15kV IEC-ESD, improved ESD
SP3232EEN-L/TR MaxLinear Pin compatible, similar spec
ST3232EBPR ST Pin compatible, 3V-5.5V
ICL3232EIAZ Renensas +/-15kV IEC ESD, TSSOP
ADM3202ARNZ ADI Similar, single supply, 4×0.1uF
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