MAX232NE4 - Dual 120kbps RS-232 Transceiver | Texas Instruments
MPN: MAX232NE4 ✓ NakahandaMAX232NE4 Ulas
An RS-232 transceiver is an interface IC that bridges the voltage-domain gap between TTL/CMOS logic and the bipolar, single-ended signal system defined by EIA-232. Within the broader electronics hierarchy, the MAX232NE4 is a line transceiver, which is a communication interface IC used to connect a digital controller or embedded system to a serial port. Two driver channels convert TTL/CMOS inputs into RS-232 levels, while two receiver channels convert RS-232 inputs into logic-compatible signals.
Key electrical attributes include a 4.5 V to 5.5 V supply range, two drivers, two receivers, full RS-232 operation, a maximum signaling rate of 120 kbit/s, and ±30 V input-level capability. The integrated charge pump eliminates the need for a negative supply rail. The recommended implementation uses 1.0 uF charge-pump capacitors, which must be installed close to the device to limit loop area and preserve switching performance.
The MAX232NE4 is appropriate for legacy RS-232 ports, industrial equipment, service interfaces, and embedded-control systems where a 5 V logic domain must communicate with a PC or peripheral over an RS-232 link. Unlike a modern USB-to-serial converter, it remains a wired, point-to-point interface and requires a host-side UART or another system that already provides serial framing.
Designers should confirm the PCB footprint, charge-pump capacitor type, driver slew behavior, and receiver logic thresholds before substitution. The ±30 V input rating improves robustness against exposed or noisy cabling, but it does not remove the need for correct grounding, twisted-pair routing where applicable, and protection against sustained overvoltage events.
This page consolidates verified manufacturer and distributor information, identifies only package-compatible cross-reference candidates, and adds application guidance and design cautions that are not summarized on a typical distributor listing.
Mga alternatibo na pwedeng ilagay na MAX232NE4 — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
MAX232EPE+
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX232EEPE
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX232NE4 Mga Spesipikasyon
| Device Type | Dual EIA-232 driver/receiver transceiver |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Rate ng Data | 120 kbit/s |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Supply Configuration | Single 5 V supply |
| Charge-Pump Capacitor Value | 1.0 uF |
| Input Voltage Level | ±30 V maximum |
| Driver Supply Current | 8 mA typical |
| ESD Protection | 8 mA typical; ±2 kV human-body-model ESD for the MAX232 family |
| Driver Output Level | ±9 V typical |
| Protocol | RS-232 / EIA-232 |
| Duplex Mode | Full duplex |
| Packhaging | 16-pin PDIP |
| Package Dimensions | 0.300 in (7.62 mm) DIP width |
| Uri ng Pagpapasok | Through-hole |
Gabay sa Pin Configuration ng MAX232NE4 0.300 in (7.62 mm) dip width
Pin configuration para sa MAX232NE4 (0.300 in (7.62 mm) dip width 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 MAX232NE4.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
MAX232NE4 ay nararapat para sa 6 aplikasyons: Legacy PC Serial Port Interface, Industrial Control Equipment, Embedded System Service Interface, Instrumentation and Test Equipment, Point-to-Point Data Terminal Equipment, RS-232 to TTL Serial Bridge.
Legacy PC Serial Port Interface
The MAX232NE4 fits legacy PC and industrial equipment that requires a wired RS-232 port rather than USB. Two driver/receiver pairs support two full-duplex channels, and the 120 kbit/s rate covers the UART baud rates commonly associated with this interface. Install the device between the 5 V logic system and the DB9 or cable driver, fit the specified 1.0 uF charge-pump capacitors, and verify that the host uses the same voltage-level convention. The integrated charge pump generates ±9 V typical outputs from one supply, avoiding a negative rail.
Inirekomenda
Industrial Control Equipment
The MAX232NE4 is useful in controller boards that must expose an RS-232 configuration or service port for tuning, diagnostics, or connection to a supervisory computer. Its single 5 V operation integrates with TTL or CMOS logic, while the ±30 V input capability adds tolerance to exposed cabling and noisy industrial environments. Place both transceiver channels according to the data-sheet layout and provide a common signal ground between the two ends of the cable.
Inirekomenda
Embedded System Service Interface
The MAX232NE4 can provide a dedicated service channel for firmware boot, configuration, and field diagnostics in an embedded controller. Two independent driver/receiver pairs allow one channel for logging and another for active control, and the 120 kbit/s limit supports common UART rates. Because the transceiver implements only the physical voltage layer, the host microcontroller must still configure its UART, command framing, and flow-control behavior.
Inirekomenda
Instrumentation and Test Equipment
The MAX232NE4 can bridge laboratory and test-instrument electronics to a legacy computer or controller through a wired RS-232 link. The two-channel arrangement supports separate command and measurement paths, while the 120 kbit/s rate is suitable for moderate-rate status and configuration traffic. Keep input and output routes away from fast-switching nodes to avoid reducing receiver margin, and use the specified charge-pump capacitors for stable driver amplitude.
Inirekomenda
Point-to-Point Data Terminal Equipment
The MAX232NE4 is appropriate for point-to-point equipment connections using full-duplex RS-232, including remote terminals and configuration equipment. It converts 5 V logic into ±9 V typical line levels and converts received line levels back into digital signals. Cable length and baud rate must be selected together, and the link should include a signal-ground reference because RS-232 is a single-ended interface rather than a differential standard.
Inirekomenda
RS-232 to TTL Serial Bridge
The MAX232NE4 can serve as the electrical interface in a compact RS-232-to-TTL bridge module for a microcontroller or embedded processor. One channel can carry a primary UART stream while the second supports hardware flow control or a second serial service, subject to the system firmware and wiring. The 16-pin PDIP package is appropriate for through-hole industrial boards, and the single 5 V supply simplifies integration with 5 V logic.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for MAX232NE4 — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | MAX232EPE+ | MAX232EEPE |
|---|---|---|---|
| Package | 16-pin PDIP | 16-pin PDIP | 16-pin PDIP |
| Brand | Texas Instruments | Analog Devices | Analog Devices |
| Device Type | Dual RS-232 driver/receiver | Dual RS-232 driver/receiver | Dual RS-232 driver/receiver |
Pangunahing mga Pagkakaiba
- Integrated single-supply charge-pump architecture (kumpara saMAX232EPE+)
- Two independent full-duplex RS-232 channels (kumpara saMAX232EPE+)
- Robust input-level tolerance (kumpara saMAX232EEPE)
Talaan ng Disenyo
Use one 1.0 uF charge-pump capacitor for each charge-pump section exactly as specified by the manufacturer data sheet. Place these capacitors adjacent to their corresponding pins to minimize loop area and switching transients. A 5 V rail with acceptable transient response is required; do not treat the MAX232NE4 as a regulator for the attached UART or system load.
Route the charge-pump components, supply pins, and ground connections as short as possible, while keeping RS-232 driver outputs away from receiver inputs and sensitive analog nodes. RS-232 is a single-ended standard, so maintain a common signal-ground reference between communicating systems. Follow the manufacturer layout and pin table rather than deriving capacitor connections from a generic MAX232 drawing.
The MAX232NE4 does not implement the UART protocol or electrical isolation. Confirm logic levels, baud rate, flow control, and grounding at the system level. Also verify whether a proposed substitute uses the same charge-pump pinout; a 16-pin PDIP package match alone does not guarantee electrical or pin-level interchangeability.
Impormasyon ng Pagsunod sa Kautusan
The supplied verified records identify the manufacturer, package, electrical function, and distributor listings but do not explicitly state RoHS, REACH, halogen-free, or conflict-minerals status. AEC-Q100 is treated as not applicable because this industrial interface IC is not identified as an automotive-qualified variant.