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MAX253CSA

Name: MAX253CSA
Rating: 4.7 (12 reviews)

IC XFRMR DRIVER RS485 8-SOIC

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製造商。部分 #MAX253CSA
包 SOIC-8
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規格

Package	Tube
ProductStatus	Obsolete
Applications	Transformer Driver
Current-Supply	450µA
Voltage-Supply	3.3V, 5V
OperatingTemperature	0°C ~ 70°C
MountingType	Surface Mount
Package/Case	8-SOIC (0.154, 3.90mm Width)

概述

Description

MAX253CSA is a Maxim Integrated (Analog Devices) dual RS-232 transceiver. It provides two TTL/CMOS-to-RS-232 drivers and two RS-232 receivers, enabling a microcontroller or logic UART to communicate with RS-232 devices. It uses an on-chip charge-pump to generate the required RS-232 voltage levels from a single supply (typically 3.0–5.5 V). External charge-pump capacitors are required. The CSA suffix denotes a specific package/temperature grade; exact pinout, capacitor values, and electrical specs (voltage swing, data rate, ESD) are in the datasheet. Common use: interfacing microcontrollers to RS-232 peripherals in modems, serial ports, and embedded systems.

Features

Key features of MAX253CSA:
- Dual RS-232 transmitter and receiver (2 drivers, 2 receivers)
- Single-supply operation from 3V to 5.5V
- On-chip charge-pump to generate RS-232 voltage levels from the supply
- Requires external capacitors for the charge pump (typical four caps)
- TTL/CMOS-compatible logic inputs; RS-232 outputs meet standard RS-232 levels
- Low quiescent current for power-sensitive applications
- ESD/overvoltage protection on RS-232 lines
- 16-pin package options with commercial/industrial temperature ranges
- Suitable for microcontroller UART interfaces to RS-232 devices

Package

MAX253CSA is in a 16-pin small-outline package (SOIC-16).

Pinout

Pin count: 16 pins (16-pin package such as DIP/SOIC).
Function: Dual RS-232 transceiver with a charge-pump. It contains two drivers and two receivers to convert TTL/CMOS logic levels to RS-232 levels and vice versa; requires external charge-pump capacitors for the voltage generation. Typical supply is 5V.

Manufacturer

Manufacturer: Maxim Integrated (now part of Analog Devices).
What kind of company: An American semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (e.g., power management, interfaces, data converters, amplifiers) used in a wide range of electronics.

Application

MAX253CSA is a dual RS-232 transceiver (two drivers, two receivers). Typical applications:
- Embedded systems needing RS-232 serial I/O (microcontrollers, SBCs)
- Data-communication equipment (modems, routers, serial gateways)
- Point-of-sale terminals, printers, cash registers
- Industrial automation/instrumentation (PLCs, sensors, test gear)
- Telecom/network equipment with serial interfaces
- Any device requiring robust RS-232 interface from TTL/CMOS logic level

Equivalent

Equivalent products (2-channel RS-232 transceivers with charge pumps): Analog Devices ADM232/ADM232A; STMicroelectronics SP3232/SP3232E; Maxim MAX3232 (and MAX3221/MAX3222 for different voltages). Ensure identical supply range and pinout for a drop-in replacement.