RS-232 Transceivers

Maxim's true RS-232 transceivers use four 0.1 µF external capacitors

Image of Maxim Integrated's RS-232 TransceiversMaxim's MAX3222/MAX3232/MAX3237/MAX3241 transceivers have a proprietary low-dropout transmitter output stage. This enables true RS-232 performance from a 3.0 V to 5.5 V supply with a dual charge pump. The devices require only four small, 0.1 µF external charge-pump capacitors. The MAX3222, MAX3232, and MAX3241 run at data rates of 120 kbps while maintaining RS-232 output levels. The MAX3237 runs at data rates of 250 kbps in the normal operating mode and 1 Mbps in the MegaBaud™ operating mode, while maintaining RS-232 output levels.

The MAX3222 and MAX3232 have two receivers and two drivers. The MAX3222 features a 1 µA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1 µA supply current. The MAX3222 and MAX3232 are pin, package, and functionally compatible with the industry-standard MAX242 and MAX232, respectively.

The MAX3241 is a complete serial port (3 drivers/5 receivers) designed for notebook and sub-notebook computers. The MAX3237 (5 drivers/3 receivers) is ideal for fast modem applications. Both these devices feature a shutdown mode in which all receivers can remain active while using only 1 µA supply current. Receivers R1 (MAX3237/MAX3241) and R2 (MAX3241) have extra outputs in addition to their standard outputs. These extra outputs are always active, allowing external devices, such as a modem, to be monitored without forward biasing the protection diodes in circuitry that may have VCC completely removed.

Features

  • True RS-232 transceivers using four 0.1 µF external capacitors
  • 3.0 V to 5.5 V
  • Low-power
  • Up to 1 Mbps

MAX3222 Series

ImageManufacturer Part NumberDescriptionTypeProtocolAvailable Quantity
MAX3222CUP+ datasheet linkIC TXRX RS-232 LP 20-TSSOPMAX3222CUP+IC TXRX RS-232 LP 20-TSSOPTransceiverRS2321451 - Immediate
MAX3222CUP+ product page link
MAX3222CWN+ datasheet linkIC TXRX RS-232 LP 18-SOICMAX3222CWN+IC TXRX RS-232 LP 18-SOICTransceiverRS232891 - Immediate
3400 - Factory Stock
MAX3222CWN+ product page link
MAX3222CPN+ datasheet linkIC TXRX RS232 120KBPS LP 18-DIPMAX3222CPN+IC TXRX RS232 120KBPS LP 18-DIPTransceiverRS232304 - Immediate
5580 - Factory Stock
MAX3222CPN+ product page link
MAX3222CAP+ datasheet linkIC TXRX RS-232 LP 20-SSOPMAX3222CAP+IC TXRX RS-232 LP 20-SSOPTransceiverRS232359 - Immediate
MAX3222CAP+ product page link
MAX3222CPN datasheet linkIC TXRX RS232 120KBPS LP 18-DIPMAX3222CPNIC TXRX RS232 120KBPS LP 18-DIPTransceiverRS2320MAX3222CPN product page link
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MAX3232 Series

ImageManufacturer Part NumberDescriptionTypeProtocolAvailable Quantity
MAX3232CSE+ datasheet linkIC TXRX RS232 1MBPS LP 16-SOICMAX3232CSE+IC TXRX RS232 1MBPS LP 16-SOICTransceiverRS2327467 - Immediate
MAX3232CSE+ product page link
MAX3232CUE+ datasheet linkIC RS232 TRANSCVR 16-16TSSOPMAX3232CUE+IC RS232 TRANSCVR 16-16TSSOPTransceiverRS2325267 - Immediate
MAX3232CUE+ product page link
MAX3232CAE+ datasheet linkIC TXRX RS232 250KBPS LP 16-SSOPMAX3232CAE+IC TXRX RS232 250KBPS LP 16-SSOPTransceiverRS2322133 - Immediate
MAX3232CAE+ product page link
MAX3232CPE+ datasheet linkIC TXRX RS-232 LP 16-DIPMAX3232CPE+IC TXRX RS-232 LP 16-DIPTransceiverRS2322250 - Immediate
11475 - Factory Stock
MAX3232CPE+ product page link
MAX3232CSE datasheet linkIC TXRX RS232 1MBPS LP 16-SOICMAX3232CSEIC TXRX RS232 1MBPS LP 16-SOICTransceiverRS2320MAX3232CSE product page link
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MAX3237 Series

ImageManufacturer Part NumberDescriptionTypeProtocolAvailable Quantity
MAX3237EAI+ datasheet linkIC TXRX RS232 1MBPS LP 28-SSOPMAX3237EAI+IC TXRX RS232 1MBPS LP 28-SSOPTransceiverRS232345 - Immediate
1886 - Factory Stock
MAX3237EAI+ product page link
MAX3237CAI+ datasheet linkIC TXRX RS232 1MBPS LP 28-SSOPMAX3237CAI+IC TXRX RS232 1MBPS LP 28-SSOPTransceiverRS232170 - Immediate
1426 - Factory Stock
MAX3237CAI+ product page link
MAX3237ECAI+ datasheet linkIC TXRX RS-232 LP 28-SSOPMAX3237ECAI+IC TXRX RS-232 LP 28-SSOPTransceiverRS232240 - Immediate
3174 - Factory Stock
MAX3237ECAI+ product page link
MAX3237CAI datasheet linkIC TXRX RS232 1MBPS LP 28-SSOPMAX3237CAIIC TXRX RS232 1MBPS LP 28-SSOPTransceiverRS2320MAX3237CAI product page link
MAX3237EAI datasheet linkIC TXRX RS232 1MBPS LP 28-SSOPMAX3237EAIIC TXRX RS232 1MBPS LP 28-SSOPTransceiverRS2320MAX3237EAI product page link
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MAX3241 Series

ImageManufacturer Part NumberDescriptionTypeProtocolAvailable Quantity
MAX3241CUI+ datasheet linkIC TXRX RS-232 LP 28-TSSOPMAX3241CUI+IC TXRX RS-232 LP 28-TSSOPTransceiverRS2321120 - Immediate
300 - Factory Stock
MAX3241CUI+ product page link
MAX3241CAI+ datasheet linkIC TXRX RS232 1MBPS LP 28-SSOPMAX3241CAI+IC TXRX RS232 1MBPS LP 28-SSOPTransceiverRS232238 - Immediate
MAX3241CAI+ product page link
MAX3241CWI+ datasheet linkIC TXRX RS-232 LP 28-SOICMAX3241CWI+IC TXRX RS-232 LP 28-SOICTransceiverRS2323 - Immediate
275 - Factory Stock
MAX3241CWI+ product page link
MAX3241CWI datasheet linkIC TXRX RS232 1MBPS LP 28-SOICMAX3241CWIIC TXRX RS232 1MBPS LP 28-SOICTransceiverRS2320MAX3241CWI product page link
MAX3241CAI datasheet linkIC TXRX RS232 1MBPS LP 28-SSOPMAX3241CAIIC TXRX RS232 1MBPS LP 28-SSOPTransceiverRS2320MAX3241CAI product page link
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Published: 2013-02-01