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Analog Devices Inc./Maxim Integrated MAX3232ECAE+TGA8
- Part No.:
- MAX3232ECAE+TGA8
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- Analog Devices Inc./Maxim Integrated
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- Drivers, Receivers, Transceivers
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MAX3232ECAE+TGA8.pdf
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Product Details
MAX3232ECAE+T - Maxim ±15kV ESD-Protected +3V to +5.5V RS-232 Transceiver, 2-Tx/2-Rx (SSOP-16)
The MAX3232ECAE+T from Maxim Integrated (Analog Devices) is a +3V to +5.5V RS-232 transceiver with two drivers and two receivers and ±15kV ESD protection on the RS-232 I/O. A dual charge pump and small 0.1µF capacitors deliver true RS-232 from a 3.3V rail - ideal for 3V notebook, PDA and portable serial ports. In a 16-pin SSOP.
Product Introduction
The MAX3232ECAE+T belongs to Maxim's MAX3222E/MAX3232E/MAX3237E/MAX3241E family of ±15kV ESD-protected, +3V to +5.5V RS-232 transceivers. The MAX3232E is the two-driver/two-receiver member - the 3V-capable, ESD-hardened counterpart of the classic MAX232, built for modern low-voltage systems.
A dual charge pump generates the RS-232 line levels from a single 3.0V to 5.5V supply, needing only 0.1µF capacitors. Every RS-232 input and output is protected to ±15kV Human Body Model ESD, so the serial connector survives real-world static without external protection. Receivers include a 5kΩ input pulldown and translate RS-232 to TTL/CMOS.
Because it runs from 3.3V yet produces compliant RS-232, the MAX3232E is the standard choice for 3V notebooks, PDAs, hand-held terminals and any portable design whose serial port faces an exposed connector. This grade comes in a 16-pin SSOP (the family also offers TSSOP, TQFN and wide-SO bodies).
Expert Technical Insight
Why pick the MAX3232E for 3V serial?
- 3.3V RS-232 + ±15kV ESD: it makes true RS-232 levels from a 3.3V rail and hardens the connector pins to ±15kV HBM - the combination modern low-voltage, externally-exposed ports need.
- MAX232-style 2/2 with 0.1µF: two drivers and two receivers in the familiar layout, but with small 0.1µF charge-pump capacitors instead of the 5V MAX232's 1µF.
- One footprint, many bodies: the MAX3232E pinout is shared across SSOP/TSSOP/TQFN, so you can pick the package (this is the SSOP CAE) without changing the schematic.
Key Benefits
±15kV HBM ESD on all RS-232 I/O pins for exposed 3V serial ports.
True RS-232 from 3.3V via dual charge pump; only 0.1µF capacitors.
Two Tx and two Rx (5kΩ input pulldown); EIA/TIA-232 compatible.
16-pin SSOP; same MAX3232E pinout across SSOP/TSSOP/TQFN options.
Specifications
| Parameter | Value | Condition / Notes |
|---|---|---|
| Device Type | RS-232 transceiver (2 Tx / 2 Rx), ESD-protected | MAX3222E-MAX3241E family |
| Manufacturer | Maxim Integrated (Analog Devices) | |
| ESD Protection | ±15 kV HBM | RS-232 I/O pins |
| Supply Voltage | +3.0 V ~ +5.5 V | Single supply |
| Charge Pump | Integrated dual | Generates RS-232 levels from 3.3V |
| External Capacitors | 0.1 µF | 4 charge-pump + 1 VCC bypass |
| Receiver Pulldown | 5 kΩ | On R1IN/R2IN |
| Drivers / Receivers | 2 / 2 | |
| Operating Temperature | -40°C ~ +85°C | Extended (E) |
| Package | 16-Pin SSOP (CAE) | "+" lead-free; "T" tape & reel |
Note: Refer to the official Maxim MAX3222E-MAX3241E datasheet for full electrical parameters. Subject to change without notice; verify all parameters before final design.
Package Information
The MAX3232ECAE+T is supplied in a 16-pin SSOP package, indicated by the CAE suffix. The MAX3232E uses one 16-pin pinout shared across SSOP, TSSOP and TQFN bodies, so package choice does not change the schematic.
The "+" suffix indicates lead-free, RoHS-compliant finish and the "T" suffix tape-and-reel packing. Standard 16-lead SSOP land patterns and reflow profiles apply; place the four 0.1µF charge-pump capacitors and the VCC bypass close to the device. The diagram below shows the typical operating circuit.
Pin Configuration (SSOP-16)
The MAX3232E uses a 16-pin RS-232 pinout (top view):
- Pin 1 - C1+ / Pin 3 - C1- / Pin 4 - C2+ / Pin 5 - C2-: Charge-pump capacitor connections.
- Pin 2 - V+ / Pin 6 - V-: Charge-pump outputs (+5.5V / -5.5V).
- Pin 11 - T1IN / Pin 10 - T2IN: Driver TTL/CMOS inputs.
- Pin 14 - T1OUT / Pin 7 - T2OUT: Driver RS-232 outputs (±15kV ESD).
- Pin 13 - R1IN / Pin 8 - R2IN: Receiver RS-232 inputs (±15kV ESD, 5kΩ pulldown).
- Pin 12 - R1OUT / Pin 9 - R2OUT: Receiver TTL/CMOS outputs.
- Pin 15 - GND / Pin 16 - VCC: Ground and +3V-+5.5V supply.
Connect the four 0.1µF capacitors, route T_IN/R_OUT to the UART and the ESD-protected T_OUT/R_IN to the RS-232 connector. Confirm the exact pin assignment against the datasheet image below before layout.
Alternative Parts
The following parts are listed for reference. Verify channel count, package and ESD before substituting.
| Part Number | Brand | Type | Package | Key Feature |
|---|---|---|---|---|
| MAX3232ECUE+T | Maxim | ±15kV ESD RS-232 (2/2) | TSSOP-16 | Same MAX3232E, TSSOP |
| MAX3232EUE+T | Maxim | RS-232 (2/2) | TSSOP-16 | 3V RS-232, TSSOP |
| MAX3221CUE+T | Maxim | RS-232, 1-Tx/1-Rx, AutoShutdown | TSSOP-16 | Single-channel, 1µA |
| MAX3243EAI+ | Maxim | RS-232, 3-Tx/5-Rx, AutoShutdown | SSOP-28 | Full serial-port, ±15kV ESD |
Manufacturer Information
Maxim Integrated, now part of Analog Devices (NASDAQ: ADI), extended its industry-standard RS-232 line to 3V and ±15kV ESD with the MAX3222E-MAX3241E family. The MAX3232E is the 2-Tx/2-Rx workhorse for low-voltage serial ports.
Maxim/ADI provides complete datasheets, application notes and long-term supply, with authorized distribution and technical support across China for both prototype and volume programs.
Application Areas
Frequently Asked Questions
What is MAX3232ECAE+T used for?
It is a +3V to +5.5V, ±15kV ESD-protected RS-232 transceiver with two drivers and two receivers, used for 3V notebooks, PDAs, hand-held terminals and any low-voltage serial port facing an exposed connector.
How is the MAX3232E different from the MAX232?
The MAX3232E operates from 3.0V to 5.5V (vs the MAX232's 5V), uses 0.1µF capacitors (vs 1µF) and adds ±15kV ESD on the RS-232 pins, while keeping the same 2-Tx/2-Rx function.
What capacitors does it need?
Four 0.1µF charge-pump capacitors plus a 0.1µF VCC bypass, on a single +3.0V to +5.5V supply.
What package is MAX3232ECAE+T?
A 16-pin SSOP (CAE); the same MAX3232E pinout is also available in TSSOP and TQFN.
Disclaimer
Information Accuracy: Technical specifications on this page are based on the Maxim official datasheet. We strive for accuracy and completeness, but specifications are subject to change without notice. Verify all parameters before final design.
Product Authenticity Guarantee: We guarantee all products sold are genuine factory originals with complete material traceability.
Technical Support: Free technical consultation services are available both before and after purchase.
Application Note: This product page is for reference only. Suitability for specific applications should be verified by design engineers based on actual system requirements.
MAX3232ECAE+TGA8 Specifications
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