# MAX3490ESA+T

**ElecSuper** · RS-485 / RS-422 ICs · SOP-8

MAX3490ESA+T from ElecSuper, in a SOP-8. 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 | VCC | power_in | Supply pin; the device operates from 3.0 V to 5.5 V, with an absolute maximum VCC of +7 V. |
| 2 | RO | output | Receiver output: driven high when A-B is at or above +200 mV and low when A-B is at or below -200 mV. |
| 3 | DI | input | Driver input: low drives Y low and Z high, high drives Y high and Z low; VIH minimum is 2.0 V, VIL maximum is 0.8 V, and absolute range is -0.3 V to VCC+0.3 V. |
| 4 | GND | power_in | Ground reference; all voltages on the device are referenced to this pin. |
| 5 | Y | output | Non-inverting driver output that follows DI, with short-circuit output current limited to 250 mA maximum per the electrical table. |
| 6 | Z | output | Inverting driver output, complementary to Y, with short-circuit output current limited to 250 mA maximum per the electrical table. |
| 7 | B | input | Inverting receiver input on the bus, with an absolute bus-side input voltage range of -8 V to +13 V. |
| 8 | A | input | Non-inverting receiver input on the bus, with an absolute bus-side input voltage range of -8 V to +13 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ElecSuper |
| Package | SOP-8 |
| Category | Interface |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage VCC | VCC | 3 |  | 5.5 | V | Product description (3.0V~5.5V supply) | 1 |
| Supply voltage VCC (absolute maximum) | VCC |  |  | 7 | V |  | 2 |
| Control port voltage DI | DI | -0.3 |  |  | V | Printed as -0.3~VCC+0.3 | 2 |
| Bus-side input voltage A, B | A, B | -8 |  | 13 | V |  | 2 |
| Receiver output voltage RO | RO | -0.3 |  |  | V | Printed as -0.3~VCC+0.3 | 2 |
| Operating ambient temperature range | Tamb | -40 |  | 125 | °C |  | 2 |
| Storage temperature range | Tstg | -60 |  | 150 | °C |  | 2 |
| Soldering temperature range |  |  |  | 300 | °C |  | 2 |
| Continuous power dissipation SOP8 |  |  |  | 400 | mW | SOP8 package | 2 |
| Driver differential output (no load) | VOD1 |  |  | 5 | V | VCC=5V | 3 |
| Driver differential output | VOD2 | 1.5 |  |  | V | Figure 2, RL = 54 Ω | 3 |
| Change in magnitude of differential output voltage | ΔVOD |  |  | 0.2 | V | Figure 2, RL = 54 Ω | 3 |
| Output common-mode voltage | VOC |  |  | 3 | V | Figure 2, RL = 54 Ω | 3 |
| Change in magnitude of common-mode output voltage | ΔVOC |  |  | 0.2 | V | Figure 2, RL = 54 Ω | 3 |
| Logic input high voltage | VIH | 2 |  |  | V | DI | 3 |
| Logic input low voltage | VIL |  |  | 0.8 | V | DI | 3 |
| Logic input current | IIN1 | -2 |  | 2 | uA | DI | 3 |
| Output short-circuit current, short to high | IOSD1 | 35 |  | 250 | mA | Short to 0V~12V | 3 |
| Output short-circuit current, short to low | IOSD2 | -250 |  | -35 | mA | Short to -7V~0V | 3 |
| Receiver input current (A, B) | IIN2 |  |  | 125 | uA | VCC=0 or 3.3V, VIN = 12 V | 3 |
| Receiver input current (A, B) | IIN2 | -100 |  |  | uA | VCC=0 or 3.3V, VIN = -7V | 3 |
| Positive input threshold voltage | VIT+ | 200 |  |  | mV | -7V≤VCM≤12V | 3 |
| Negative input threshold voltage | VIT- |  |  | -200 | mV | -7V≤VCM≤12V | 3 |
| Input hysteresis voltage | Vhys |  | 10 | 30 | mV | -7V≤VCM≤12V | 3 |
| Output low voltage | VOL |  |  | 0.4 | V | IOUT = +4mA, VID = -200 mV | 3 |
| Three-state input leakage current | IOZR | -1 |  | 1 | uA | 0.4V<VO<2.4V | 4 |
| Receiver input resistance | RIN | 96 |  |  | kΩ | -7V≤VCM≤12V | 4 |
| Receiver short-circuit current | IOSR | -95 |  | 95 | mA | 0 V≤VO≤VCC | 4 |
| Supply current | ICC |  | 240 | 400 | uA | DI = 0 V or VCC | 4 |
| ESD HBM, A, B, Y, Z ports |  | -15 |  | 15 | kV | Human body model | 4 |
| ESD HBM, other ports |  | -6 |  | 6 | kV | Human body model | 4 |
| Driver propagation delay, low to high | tPLH |  | 15 | 35 | ns | RL=54Ω, CL=100pF, see Figures 3 and 4 | 4 |
| Driver propagation delay, high to low | tPHL |  | 15 | 35 | ns | RL=54Ω, CL=100pF, see Figures 3 and 4 | 4 |
| Driver differential output skew | tSKEW1 |  | 7 | 10 | ns | RL=54Ω, CL=100pF | 4 |
| Differential output delay / transition time | tDD, tTD |  | 10 | 25 | ns | RL=54Ω, CL=100pF | 4 |
| Receiver input to output propagation delay, low to high | tRPLH | 20 | 60 | 90 | ns | VID≥2.0V; rise and fall time ≤15ns | 4 |
| Receiver input to output propagation delay, high to low | tRPHL | 20 | 60 | 90 | ns | VID≥2.0V; rise and fall time ≤15ns | 4 |
| Receiver output skew | tSKEW2 |  | 7 | 10 | ns |  | 4 |

## CAD (KiCad official)

- Symbol: `MAX3490ESA+T`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `max3490esa-t-etched.step` / `max3490esa-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max3490esa-t.step` / `max3490esa-t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ElecSuper datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604435632185880576) (11 pp, sha256 `ec4f7a669703c158`, retrieved 2026-10-18, 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/max3490esa-t-datasheet.pdf)