MAX13433EIM

HGSEMI · RS-485 / RS-422 ICs · SOP-14

MAX13433EIM from HGSEMI, in a SOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VL	power_in	Input logic level supply, to be bypassed to GND with a 0.1µF capacitor placed as close to the pin as possible, and operating from 1.62V up to VCC.
2	RO	output	Receiver output, which goes high when V(A)-V(B) is above -50mV and low when V(A)-V(B) is below -200mV while the receiver is enabled.
3	DE	input	Driver output enable, where a high level enables the driver and a low level disables it into a high-impedance state.
4	RE	input	Receiver output enable, where a low level makes RO valid and a high level disables the receiver; RE high with DE low puts the chip in shutdown.
5	DI	input	Driver input, where a low level forces the non-inverting output low and the inverting output high, and a high level forces the non-inverting output high and the inverting output low.
6	GND	power_in	Ground.
7	NC	unconnected	Not connected.
8	GND	power_in	Ground.
9	Y	bidirectional	Non-inverting driver output and non-inverting receiver input of the RS-422 bus.
10	Z	bidirectional	Inverting driver output and inverting receiver input of the RS-422 bus.
11	B	bidirectional	Inverting bus terminal, where the receiver input impedance is 1/8 unit load (96kΩ) per the datasheet.
12	A	bidirectional	Non-inverting bus terminal, where the receiver input impedance is 1/8 unit load (96kΩ) per the datasheet.
13	NC	unconnected	Not connected.
14	VCC	power_in	Positive supply, recommended operating range 3V to 5.5V, to be bypassed to GND with a 0.1µF capacitor.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOP-14
Category	Interface
Pins	14

CAD (KiCad official)

Symbol: MAX13433EIM
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOP-14 (KiCad packages3D, STEP)
3D model files: max13433eim-etched.step / max13433eim-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max13433eim.step / max13433eim.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: HGSEMI datasheet (11 pp, sha256 170ed76270137c59, retrieved 2026-10-27, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

# MAX13433EIM

**HGSEMI** · RS-485 / RS-422 ICs · SOP-14

MAX13433EIM from HGSEMI, in a SOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VL | power_in | Input logic level supply, to be bypassed to GND with a 0.1µF capacitor placed as close to the pin as possible, and operating from 1.62V up to VCC. |
| 2 | RO | output | Receiver output, which goes high when V(A)-V(B) is above -50mV and low when V(A)-V(B) is below -200mV while the receiver is enabled. |
| 3 | DE | input | Driver output enable, where a high level enables the driver and a low level disables it into a high-impedance state. |
| 4 | RE | input | Receiver output enable, where a low level makes RO valid and a high level disables the receiver; RE high with DE low puts the chip in shutdown. |
| 5 | DI | input | Driver input, where a low level forces the non-inverting output low and the inverting output high, and a high level forces the non-inverting output high and the inverting output low. |
| 6 | GND | power_in | Ground. |
| 7 | NC | unconnected | Not connected. |
| 8 | GND | power_in | Ground. |
| 9 | Y | bidirectional | Non-inverting driver output and non-inverting receiver input of the RS-422 bus. |
| 10 | Z | bidirectional | Inverting driver output and inverting receiver input of the RS-422 bus. |
| 11 | B | bidirectional | Inverting bus terminal, where the receiver input impedance is 1/8 unit load (96kΩ) per the datasheet. |
| 12 | A | bidirectional | Non-inverting bus terminal, where the receiver input impedance is 1/8 unit load (96kΩ) per the datasheet. |
| 13 | NC | unconnected | Not connected. |
| 14 | VCC | power_in | Positive supply, recommended operating range 3V to 5.5V, to be bypassed to GND with a 0.1µF capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-14 |
| Category | Interface |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `MAX13433EIM`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOP-14 (KiCad packages3D, STEP)
- 3D model files: `max13433eim-etched.step` / `max13433eim-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max13433eim.step` / `max13433eim.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [HGSEMI datasheet](docs/max13433eim-datasheet.pdf) (11 pp, sha256 `170ed76270137c59`, retrieved 2026-10-27, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/max13433eim-datasheet.pdf)