# SP3232EUEY-L

**MaxLinear** · RS232 ICs · TSSOP-16

SP3232EUEY-L from MaxLinear, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | C1+ | passive | Positive terminal of the voltage doubler charge-pump capacitor (C1, typ 0.1µF). Connect between C1+ and C1-. |
| 2 | V+ | power_out | +5.5V output generated by the internal charge pump. Bypass to GND with a 0.1µF capacitor. |
| 3 | C1- | passive | Negative terminal of the voltage doubler charge-pump capacitor (C1, typ 0.1µF). |
| 4 | C2+ | passive | Positive terminal of the inverting charge-pump capacitor (C2, typ 0.1µF). Connect between C2+ and C2-. |
| 5 | C2- | passive | Negative terminal of the inverting charge-pump capacitor (C2, typ 0.1µF). |
| 6 | V- | power_out | -5.5V output generated by the internal inverting charge pump. Bypass to GND with a 0.1µF capacitor. |
| 7 | T2OUT | output | RS-232 driver #2 output. Typical output swing ±5.4V into a 3kΩ load; ±15kV ESD protected. |
| 8 | R2IN | input | RS-232 receiver #2 input. Accepts ±15V RS-232 signals; input resistance 3-7kΩ (typ 5kΩ). |
| 9 | R2OUT | output | TTL/CMOS receiver #2 output. Drives VOL ≤ 0.4V @ 1.6mA and VOH ≥ VCC-0.6V @ -1mA. |
| 10 | T2IN | input | TTL/CMOS driver #2 input. Logic threshold LOW ≤ 0.8V, HIGH ≥ 2.0V at VCC=3.3V; typ 250mV input hysteresis. |
| 11 | T1IN | input | TTL/CMOS driver #1 input. Logic threshold LOW ≤ 0.8V, HIGH ≥ 2.0V at VCC=3.3V; typ 250mV input hysteresis. |
| 12 | R1OUT | output | TTL/CMOS receiver #1 output. Drives VOL ≤ 0.4V @ 1.6mA and VOH ≥ VCC-0.6V @ -1mA. |
| 13 | R1IN | input | RS-232 receiver #1 input. Accepts ±15V RS-232 signals; input resistance 3-7kΩ (typ 5kΩ). |
| 14 | T1OUT | output | RS-232 driver #1 output. Typical output swing ±5.4V into a 3kΩ load; ±15kV ESD protected. |
| 15 | GND | power_in | Device ground reference. |
| 16 | VCC | power_in | Positive supply, +3.0V to +5.5V. Bypass to GND with a 0.1µF capacitor. Absolute max +6.0V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MaxLinear |
| Package | TSSOP-16 |
| Category | Interface |
| Pins | 16 |

## Ordering variants

Same part, different packaging or reel option.

- `SP3232EUEY-LEUCY-L/TR`
- `SP3232EUEY-L/TR`
- `SP3232EUEY-LEUCN-L`
- `SP3232EUEY-LEUCN-L/TR`
- `SP3232EUEY-LEUEA-L`

## CAD (KiCad official)

- Symbol: `SP3232EUEY-L`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `sp3232euey-l-etched.step` / `sp3232euey-l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sp3232euey-l.step` / `sp3232euey-l.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MaxLinear datasheet](docs/sp3232euey-l-datasheet.pdf) (20 pp, sha256 `69636e7f4c5d9299`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/sp3232euey-l-datasheet.pdf)