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MAX232CPE

Dual RS-232 driver/receiver, 5V, charge pump, 120kbps, PDIP-16

8000

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制造商零件：

MAX232CPE

包装：

PDIP-16 (7.62mm width, 2.54mm pitch, through-hole)

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说明

产品概览

The MAX232CPE from Analog Devices (formerly Maxim Integrated) is a dual RS-232 driver/receiver that converts TTL/CMOS logic levels to RS-232 voltage levels from a single 5V supply using an integrated charge pump, requiring only four external 1µF capacitors in a PDIP-16 package.

主要规格

Drivers / Receivers 2 / 2
电源电压 4.5V to 5.5V (single 5V)
Supply Current 8mA typical
数据速率 Up to 120kbit/s
Driver Output Swing ±8V typical loaded (±5V min per EIA-232)
Receiver Input Threshold 0.8V (LOW), 2.4V (HIGH)
Receiver Hysteresis 0.5V typical
Receiver Input Range ±30V
Driver Slew Rate 24V/µs unloaded, 10V/µs loaded
ESD Protection 2000V HBM (upgrade to MAX202 for 15kV)
Charge Pump Capacitors 4 × 1µF (external)
工作温度 0°C to +70°C
包装 PDIP-16 (7.62mm width)

特点

  • Meets TIA/EIA-232-F and ITU V.28 specifications
  • Operates from single 5V supply
  • Integrated dual charge pump generates ±10V
  • Requires only four 1µF external capacitors
  • Two drivers and two receivers
  • ±30V receiver input range
  • Low supply current: 8mA typical
  • Internal pull-up resistors on driver inputs

应用

  • UART-to-RS-232 level conversion
  • PC serial port interfaces
  • Embedded system serial communication
  • Modem and terminal interfaces
  • Battery-powered RS-232 systems

The MAX232CPE from Analog Devices (formerly Maxim Integrated) is the industry-standard dual RS-232 driver/receiver that converts between TTL/CMOS logic levels (0-5V) and RS-232 voltage levels (±5V to ±15V) using only a single 5V power supply. An internal dual charge pump generates approximately +10V and -10V from the 5V input using four external 1µF capacitors, eliminating the need for external ±12V supplies. Each device contains two drivers that invert TTL inputs to RS-232 outputs, and two receivers that invert RS-232 inputs to TTL outputs. The drivers guarantee ±5V minimum output swing under worst-case conditions (3kΩ load, 4.5V VCC), meeting TIA/EIA-232-F requirements. The receivers have 0.5V hysteresis for noise immunity and accept input voltages up to ±30V. The CPE suffix denotes the commercial temperature range (0°C to +70°C) in a PDIP-16 through-hole package. For lower-voltage applications, the MAX3232 operates from 3.0V to 5.5V.

The MAX232CPE uses a dual charge-pump voltage converter to generate the ±10V rails needed for RS-232 driver outputs from a single 5V supply. The first charge pump uses capacitor C1 to double the 5V input to approximately +10V, stored on C3 at the V+ pin. The second charge pump uses capacitor C2 to invert the +10V to approximately -10V, stored on C4 at the V- pin. These generated voltages power the RS-232 driver output stages. Each driver is an inverting level shifter: a TTL LOW input (0V) produces an RS-232 HIGH output (+8V typical), and a TTL HIGH input (5V) produces an RS-232 LOW output (-8V typical). The inversion is by design—RS-232 defines a logic 1 (mark) as -3V to -15V and a logic 0 (space) as +3V to +15V, which is the opposite polarity of TTL. Each receiver inverts the RS-232 signal back to TTL levels: an RS-232 input above +2.4V produces a TTL LOW output, and an input below +0.8V produces a TTL HIGH output. The 0.5V hysteresis between these thresholds prevents oscillation on slow or noisy input edges. Internal 400kΩ pull-up resistors on the driver inputs ensure that unused drivers output an RS-232 LOW (mark) state, which is the idle condition for serial communication.

针脚 名称 类型 说明
1 C1+ Capacitor Charge pump capacitor C1 positive terminal
2 V+ 电源 +10V generated output (charge pump)
3 C1- Capacitor Charge pump capacitor C1 negative terminal
4 C2+ Capacitor Charge pump capacitor C2 positive terminal
5 C2- Capacitor Charge pump capacitor C2 negative terminal
6 V- 电源 -10V generated output (charge pump)
7 T2OUT 输出 Driver 2 RS-232 output
8 R2IN 输入 Receiver 2 RS-232 input
9 R2OUT 输出 Receiver 2 TTL output
10 T2IN 输入 Driver 2 TTL input
11 T1IN 输入 Driver 1 TTL input
12 R1OUT 输出 Receiver 1 TTL output
13 R1IN 输入 Receiver 1 RS-232 input
14 T1OUT 输出 Driver 1 RS-232 output
15 接地 电源 地面
16 VCC 电源 +5V supply
  • MCU Serial Port: T1IN/R1OUT connect to MCU UART TX/RX; T1OUT/R1IN connect to DB9 connector; 4×1µF caps for charge pump
  • PC Interface: MAX232 bridges 5V MCU to PC COM port via RS-232; 120kbps supports standard baud rates up to 115200
  • 3-Wire Serial: Uses 1 driver (TX) + 1 receiver (RX); remaining driver/receiver available for RTS/CTS flow control
  • Multi-Drop: Multiple MAX232 receivers on one RS-232 line; open RS-232 input defaults to HIGH on TTL output
  • Battery System: 8mA quiescent from 5V; can power-down MCU serial between transmissions for power savings
模型 制造商 主要区别 包装 Specs
MAX3232ESE+T ADI 3.3V/5V dual-supply version with ±15kV ESD on RS-232 pins and 1µA auto-powerdown SOIC-16 250kbps/3-5.5V
ST3232EBPR ST 3-5.5V RS-232 transceiver with enhanced ESD and same 16-pin pinout for direct replacement TSSOP-16 250kbps/3-5.5V
SP3232EBCN-L/TR 硅实验室 3.3V/5V equivalent with auto-powerdown and ±15kV ESD protection on bus pins DIP-16 250kbps/3-5.5V
TRS3232EIPWR TI 3-5.5V 2Tx/2Rs with ±15kV HBM ESD and 250kbps data rate in TSSOP-16 TSSOP-16 250kbps/3-5.5V
MAX3221CAE+T ADI 1Tx/1Rx single-channel version in SSOP-16 for applications needing only one serial port SSOP-16 1Mbps/1µA off

MAX232CPE is a 5V dual RS-232 driver/receiver in DIP-16 with 2Tx/2Rx and 120kbps data rate requiring four 1µF charge pump capacitors. MAX3232 operates at 3.3-5.5V with enhanced ESD and higher 250kbps rate. MAX3221 offers single-port 1Mbps with 1µA auto-powerdown. All are pin-compatible within their respective package families and use external charge pump capacitors for RS-232 voltage generation.

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质量保证

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
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For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

5. Traceability Management System

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If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

联系我们

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

发货与付款

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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