# MAX489ESD+T

**Analog Devices Inc Maxim Integrated** · RS-485 / RS-422 ICs · SOP-14

MAX489ESD+T from Analog Devices Inc Maxim Integrated, 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 | N.C. | unconnected | No connect; this pin is not internally connected. |
| 2 | RO | output | Receiver output: RO is high if A > B by 200mV and low if A < B by 200mV. |
| 3 | RE | input | Receiver output enable: RO is enabled when RE is low and is high impedance when RE is high. |
| 4 | DE | input | Driver output enable: outputs Y and Z are enabled when DE is high and are high impedance when DE is low. |
| 5 | DI | input | Driver input: a low on DI forces Y low and Z high, and a high on DI forces Y high and Z low. |
| 6 | GND | power_in | Ground reference for the device. |
| 7 | GND | power_in | Ground reference for the device (second ground pin). |
| 8 | N.C. | unconnected | No connect; this pin is not internally connected. |
| 9 | Y | output | Noninverting driver output, enabled when DE is high. |
| 10 | Z | output | Inverting driver output, enabled when DE is high. |
| 11 | B | input | Inverting receiver input. |
| 12 | A | input | Noninverting receiver input. |
| 13 | N.C. | unconnected | No connect; this pin is not internally connected. |
| 14 | VCC | power_in | Positive supply, 4.75V ≤ VCC ≤ 5.25V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc Maxim Integrated |
| Package | SOP-14 |
| Category | Interface |
| Pins | 14 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Driver Output Voltage (A, B) |  | -8 |  | 12.5 | V |  | 2 |
| Receiver Input Voltage (A, B) |  | -8 |  | 12.5 | V |  | 2 |
| Supply Voltage (VCC) | VCC |  |  | 12 | V |  | 2 |
| Control Input Voltage (RE, DE) |  | -0.5 |  |  | V | max (VCC + 0.5V) | 2 |
| Driver Input Voltage (DI) |  | -0.5 |  |  | V | max (VCC + 0.5V) | 2 |
| Receiver Output Voltage (RO) | RO | -0.5 |  |  | V | max (VCC + 0.5V) | 2 |
| Storage Temperature Range |  | -65 |  | 160 | °C |  | 2 |
| Lead Temperature (soldering) |  |  |  | 300 | °C | soldering, 10sec | 2 |
| Operating Temperature Range (E grade, MAX489ESD) | TA | -40 |  | 85 | °C | MAX4__E__ grade | 2 |
| Positive Supply Voltage | VCC | 4.75 |  | 5.25 | V | Pin description, VCC pin | 7 |
| Receiver Input Resistance | RIN | 12 |  |  | kΩ | -7V ≤ VCM ≤ 12V, all devices except MAX487/MAX1487 | 2 |
| Receiver Differential Threshold Voltage | VTH | -0.2 |  | 0.2 | V | -7V ≤ VCM ≤ 12V | 2 |
| Receiver Output High Voltage | VOH | 3.5 |  |  | V | IO = -4mA, VID = 200mV | 2 |
| Receiver Output Low Voltage | VOL |  |  | 0.4 | V | IO = 4mA, VID = -200mV | 2 |
| Three-State Output Current at Receiver | IOZR | -1 |  | 1 | µA | 0.4V ≤ VO ≤ 2.4V | 2 |
| Receiver Short-Circuit Current | IOSR | 7 |  | 95 | mA | 0V ≤ VO ≤ VCC | 3 |
| Differential Driver Output (with load) | VOD2 | 1.5 |  | 5 | V | R = 27Ω (RS-485), Figure 4 | 2 |
| Differential Driver Output (no load) | VOD1 | 2 |  | 5 | V |  | 2 |
| Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States | ΔVOD |  |  | 0.2 | V | R = 27Ω or 50Ω, Figure 4 | 2 |
| Change in Magnitude of Driver Differential Output Voltage for Complementary Output States | ΔVOD |  |  | 0.2 | V | R = 27Ω or 50Ω, Figure 4 | 2 |
| Driver Common-Mode Output Voltage | VOC |  |  | 3 | V | R = 27Ω or 50Ω, Figure 4 | 2 |
| Input Current (DE, DI, RE) | IIN1 | -2 |  | 2 | µA | DE, DI, RE | 2 |
| Input Low Voltage | VIL |  |  | 0.8 | V | DE, DI, RE | 2 |
| Input High Voltage | VIH | 2 |  |  | V | DE, DI, RE | 2 |
| Input Current (A, B) | IIN2 | -0.8 |  |  | mA | VIN = -7V; DE = 0V; VCC = 0V or 5.25V; all devices except MAX487/MAX1487 | 2 |
| Input Current (A, B) | IIN2 |  |  | 1 | mA | VIN = 12V; DE = 0V; VCC = 0V or 5.25V; all devices except MAX487/MAX1487 | 2 |
| Driver Short-Circuit Current, VO = Low | IOSD2 | 35 |  | 250 | mA | -7V ≤ VO ≤ 12V (Note 4) | 3 |
| Driver Short-Circuit Current, VO = High | IOSD1 | 35 |  | 250 | mA | -7V ≤ VO ≤ 12V (Note 4) | 3 |
| Driver Output Skew to Output | tSKEW |  | 100 | 800 | ns | Figures 6 and 8, RDIFF = 54Ω, CL1 = CL2 = 100pF | 4 |
| Driver Input to Output | tPLH, tPHL | 250 | 800 | 2000 | ns | Figures 6 and 8, RDIFF = 54Ω, CL1 = CL2 = 100pF | 4 |

## CAD (KiCad official)

- Symbol: `MAX489ESD+T`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOP-14 (KiCad packages3D, STEP)
- 3D model files: `max489esd-t-etched.step` / `max489esd-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max489esd-t.step` / `max489esd-t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Analog Devices Inc Maxim Integrated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905397440139264) (17 pp, sha256 `4ab94c4124d89450`, retrieved 2026-10-18, tier: lcsc)
- **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/max489esd-t-datasheet.pdf)