MAX3221EAE+ - 3V RS-232 Transceiver with AutoShutdown | Analog Devices
MPN: MAX3221EAE+ ✓ NakahandaMAX3221EAE+ Ulas
An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and the bipolar voltage levels used by RS-232 links. The MAX3221 family uses an internal charge-pump circuit to generate the RS-232 transmitter voltage from a single low-voltage supply. In the system hierarchy, it is a communication interface IC, a line-interface device, and a voltage-level translator used between host controllers and external serial equipment.
Key verified characteristics include a 3V to 5.5V supply range, 120 kbps data-rate capability, 1 microamp supply-current operation in shutdown, one RS-232 driver, and one receiver. AutoShutdown reduces power use when the receiver does not detect a valid signal. The 16-SSOP package is specified as approximately 5.30 mm wide in the distributor result, making the device suitable for compact equipment designs.
The MAX3221EAE+ is appropriate for embedded serial-console connections, industrial control links, point-of-sale systems, instrumentation, and USB-to-RS-232 adapters. The internal charge pump removes the need for a separate bipolar supply, while the receiver and driver provide the basic signal path between a low-voltage controller and an RS-232 connector. The tradeoff is that RS-232 is a single-ended, point-to-point interface with limited cable distance and no multidrop capability.
For layout, place charge-pump capacitors and the receiver/transmitter interface components close to their associated pins, and follow the manufacturer's recommended capacitor values. Keep the RS-232 connector-side traces away from sensitive low-level logic where practical. Confirm line rates, cable length, ground continuity, and the system supply level before finalizing the design.
This page combines the verified manufacturer description, distributor package information, application guidance, and comparison-oriented design notes to provide practical RS-232 transceiver information beyond a basic catalog listing.
Mga alternatibo na pwedeng ilagay na MAX3221EAE+ — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok MAX3221EAE+ (parehas na form factor at footprint) — pagkakaiba sa Data Rate, Product Type, Supply Voltage Range.
MAX3221CAE+
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX3221EAE+T
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX3221MDBREP
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX3221CPWRG4
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX3212EAI
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX3221EAE+ Mga Spesipikasyon
| Product Type | RS-232 transceiver |
| Supply Voltage Range | 3 V to 5.5 V |
| Rate ng Data | 120 kbps |
| Transmitter Drivers | 1 |
| Receivers | 1 |
| AutoShutdown Supply Current | 1 uA |
| Packhaging | 16-SSOP |
| Package Width | 5.30 mm |
| Uri ng Pagpapasok | Surface Mount |
| Interface Standard | EIA/TIA-232 |
| Charge-Pump Circuit | Integrated dual charge pump |
| ESD Protection | Enhanced ESD protection |
| Transmitter Output Protection | Protected RS-232 transmitter output |
| Receiver Input Protection | Protected RS-232 receiver input |
| Power Architecture | 3V-powered with automatic shutdown and wake-up |
Gabay sa Pin Configuration ng MAX3221EAE+ 5.30 mm
Pin configuration para sa MAX3221EAE+ (5.30 mm package). Ang pagnunumero ng pin, mga function, at connection diagram ay tinukoy sa datasheet ng manufacturer. Sumangguni dito para sa eksaktong footprint at mga alituntunin sa soldering.
Wala ng detalyadong pinout data na magagamit para sa MAX3221EAE+.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
MAX3221EAE+ ay nararapat para sa 6 aplikasyons: Embedded Serial Console, Industrial Control Link, USB-to-RS-232 Adapter, Point-of-Sale Terminal, Instrumentation Data Port, Battery-Powered Serial Device.
Embedded Serial Console
The MAX3221EAE+ fits embedded serial-console designs that expose a debug or configuration port through an RS-232 connector. Its 3 V to 5.5 V supply range allows use beside 3.3 V microcontrollers and 5 V system logic, while the single driver and receiver keep the interface compact. The integrated charge pump generates the required RS-232 line voltage from the local supply. AutoShutdown is useful when the port is not continuously connected, reducing supply current to the verified 1 uA shutdown value. Confirm connector wiring, ground continuity, and the exact baud-rate requirement before release.
Inirekomenda
Industrial Control Link
The MAX3221EAE+ is suitable for point-to-point industrial equipment requiring a compact, low-voltage RS-232 interface. Its 120 kbps capability supports common control and monitoring links, while enhanced ESD protection helps the connector-side interface in electrically noisy equipment. The 16-SSOP footprint preserves PCB area compared with larger multi-channel transceivers. Because RS-232 is single-ended and point-to-point, the design should include a solid ground reference, appropriate cable routing, and protection matched to the installation environment rather than treating the IC as an isolated industrial interface.
Inirekomenda
USB-to-RS-232 Adapter
A USB-to-RS-232 adapter can use the MAX3221EAE+ between a USB-to-UART controller and an external RS-232 port. The device's one-driver, one-receiver arrangement is appropriate for a basic point-to-point adapter, and its 3 V to 5.5 V operating range supports common host-side supply choices. The integrated charge pump removes the need for a separate RS-232 voltage source. Layout quality remains important: place the charge-pump capacitors near the IC, route connector traces away from sensitive digital paths, and provide a reliable chassis-to-signal-ground strategy appropriate to the adapter enclosure.
Inirekomenda
Point-of-Sale Terminal
The MAX3221EAE+ can provide the physical RS-232 link in a point-of-sale terminal or peripheral that needs a compact, low-voltage interface. Its 16-SSOP package is useful when board space is constrained, and the 120 kbps rate is more than adequate for many legacy peripheral protocols. AutoShutdown helps reduce power use when the serial cable is disconnected, while enhanced ESD protection supports connection to user-accessible equipment. Validate the peripheral's logic levels, cable length, connector shield design, and whether an isolated interface is required for externally accessible ports.
Inirekomenda
Instrumentation Data Port
The MAX3221EAE+ is appropriate for a compact instrumentation data port that converts a low-voltage controller UART into an RS-232 signal. The 3 V to 5.5 V range supports common embedded platforms, and the integrated charge-pump circuit simplifies the power architecture compared with a discrete bipolar driver. The 120 kbps capability accommodates many configuration and measurement-control protocols. Designers should still account for ground offsets, cable capacitance, ESD exposure, and the possibility of connecting the port to equipment with different RS-232 voltage conventions.
Inirekomenda
Battery-Powered Serial Device
The MAX3221EAE+ is well suited to battery-powered serial equipment where the RS-232 port is active only during maintenance or configuration. Its AutoShutdown behavior is designed to shut down the power supply and drivers when no valid receiver signal is sensed, with a verified 1 uA supply-current figure for the shutdown condition. This can reduce standby burden compared with keeping the interface continuously powered. Actual battery savings depend on the system wake-up policy, cable state, and the timing of the UART and connector. Validate leakage, startup behavior, and the exact shutdown thresholds in the datasheet.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for MAX3221EAE+ — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | MAX3221CAE+ | MAX3221EAE+T | MAX3221MDBREP | MAX3221CPWRG4 | MAX3212EAI |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Analog Devices |
| Package | 16-SSOP | 16-SSOP | 16-SSOP | 16-SSOP | 16-SSOP | 16-SSOP |
Pangunahing mga Pagkakaiba
- Single-transceiver resource utilization (kumpara saMAX3221CAE+)
- Low-voltage single-supply operation (kumpara saMAX3221MDBREP)
- Power-conscious serial ports (kumpara saMAX3212EAI)
- Package footprint continuity (kumpara saMAX3221CPWRG4)
Talaan ng Disenyo
Place the MAX3221EAE+ charge-pump capacitors close to their designated pins and keep the associated loop area small. The RS-232 connector-side nets should be routed away from sensitive logic and clock paths where practical. Because the device converts low-voltage logic into a higher-voltage RS-232 signal, PCB return-current continuity and a nearby ground reference are important. Follow the exact capacitor values and recommended PCB layout in the manufacturer datasheet rather than relying on generic bulk capacitors.
The MAX3221EAE+ operates from 3 V to 5.5 V, so verify the system rail tolerance and ensure the IC has suitable local decoupling. The integrated charge pump generates RS-232 voltage from the single supply, which simplifies the power tree but does not remove the need for clean supply bypassing. Check startup, shutdown, and AutoShutdown timing against the connected UART and cable. If the design uses a 3.3 V controller, confirm that all logic-side levels and input thresholds are compatible.
Do not treat the MAX3221EAE+ as a direct connection between an RS-232 connector and a microcontroller UART. The transmitter and receiver provide the required voltage-level translation, but connector pinout, ground, shielding, and cable length still determine reliability. RS-232 is single-ended and generally point-to-point, not a multidrop bus. For externally accessible equipment, add appropriate enclosure, chassis-ground, and surge-protection measures beyond the IC's verified ESD protection feature.
At the verified 120 kbps capability, board-level signal integrity is generally manageable for short, properly grounded RS-232 cables, but long or noisy cables can still cause errors. Minimize connector-to-IC trace length, maintain a continuous ground path, and test with the intended cable and peripheral. AutoShutdown can help disconnected or idle ports, yet repeated wake-up behavior should be verified with the actual receiver signal and system power-management policy. Do not assume ESD protection eliminates external transients.
Impormasyon ng Pagsunod sa Kautusan
The supplied distributor and manufacturer snippets do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements for MAX3221EAE+.
