SP3222EEY-L

@@ -0,0 +1,63 @@+# SP3222EEY-L++**MaxLinear** · RS232 ICs · TSSOP-20++SP3222EEY-L from MaxLinear, in a TSSOP-20. 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 | EN | input | Receiver Enable (active-low). Apply logic LOW for normal operation; drive HIGH to force the receiver outputs (R1OUT, R2OUT) into a high-impedance (high-Z) state. TTL/CMOS logic level referenced to VCC. |+| 2 | C1+ | passive | Positive terminal of the voltage-doubler charge-pump flying capacitor. Connect a 0.1µF ceramic capacitor between C1+ and C1-. |+| 3 | V+ | power_out | +5.5V output generated by the internal charge pump (voltage doubler). Bypass to GND (or VCC) with a 0.1µF capacitor. Used internally to power the RS-232 driver positive rail. |+| 4 | C1- | passive | Negative terminal of the voltage-doubler charge-pump flying capacitor. Connect a 0.1µF ceramic capacitor between C1+ and C1-. |+| 5 | C2+ | passive | Positive terminal of the inverting charge-pump flying capacitor. Connect a 0.1µF ceramic capacitor between C2+ and C2-. |+| 6 | C2- | passive | Negative terminal of the inverting charge-pump flying capacitor. Connect a 0.1µF ceramic capacitor between C2+ and C2-. |+| 7 | V- | power_out | -5.5V output generated by the internal charge pump (inverter). Bypass to GND (or VCC) with a 0.1µF capacitor. Used internally to power the RS-232 driver negative rail. |+| 8 | T2OUT | output | RS-232 driver #2 output. Drives an RS-232-compatible line with a typical output swing of ±5.4V into a 3kΩ load. Short-circuit protected (continuous to GND). |+| 9 | R2IN | input | RS-232 receiver #2 input. Accepts ±15V (up to ±25V absolute max) RS-232 line levels; internal 5kΩ (typ) input resistance to GND. Interoperable down to a 2.7V RS-232 source. |+| 10 | R2OUT | output | TTL/CMOS receiver #2 output. Rail-to-rail CMOS output referenced to VCC; goes high-Z when EN is HIGH (SP3222E only). VOH ≥ VCC−0.6V at −1mA, VOL ≤ 0.4V at 1.6mA. |+| 11 | N.C. | unconnected | No internal connection. Leave floating or tie to any convenient net; not electrically connected to the die. |+| 12 | T2IN | input | TTL/CMOS driver #2 input. Logic level referenced to VCC; VIL ≤ 0.8V, VIH ≥ 2.0V (VCC=3.3V) or ≥ 2.4V (VCC=5.0V). Typical input hysteresis 250mV. |+| 13 | T1IN | input | TTL/CMOS driver #1 input. Logic level referenced to VCC; VIL ≤ 0.8V, VIH ≥ 2.0V (VCC=3.3V) or ≥ 2.4V (VCC=5.0V). Typical input hysteresis 250mV. |+| 14 | N.C. | unconnected | No internal connection. Leave floating or tie to any convenient net; not electrically connected to the die. |+| 15 | R1OUT | output | TTL/CMOS receiver #1 output. Rail-to-rail CMOS output referenced to VCC; goes high-Z when EN is HIGH (SP3222E only). VOH ≥ VCC−0.6V at −1mA, VOL ≤ 0.4V at 1.6mA. |+| 16 | R1IN | input | RS-232 receiver #1 input. Accepts ±15V (up to ±25V absolute max) RS-232 line levels; internal 5kΩ (typ) input resistance to GND. Interoperable down to a 2.7V RS-232 source. |+| 17 | T1OUT | output | RS-232 driver #1 output. Drives an RS-232-compatible line with a typical output swing of ±5.4V into a 3kΩ load. Short-circuit protected (continuous to GND). |+| 18 | GND | power_in | Device ground reference (0V). All logic and RS-232 signals are referenced to this pin. |+| 19 | VCC | power_in | Primary supply input, 3.0V to 5.5V. Bypass to GND with a 0.1µF ceramic capacitor placed close to the pin. Absolute max −0.3V to +6.0V. |+| 20 | SHDN | input | Shutdown control input (active-low). Drive HIGH for normal operation; drive LOW to shut down the drivers (T1OUT/T2OUT high-Z) and disable the on-board charge-pump power supply, dropping supply current to <1µA (SP3222E only). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | MaxLinear |+| Package | TSSOP-20 |+| Category | Interface |+| Pins | 20 |++## Ordering variants++- `SP3222EEY-LECY-L/TR`+- `SP3222EEY-LEEY-L/TR`+- `SP3222EEY-LECA-L/TR`+- `SP3222EEY-LEEA-L/TR`+- `SP3222EEY-LECT-L/TR`++## CAD (KiCad official)++- Symbol: `SP3222EEY-L`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [MaxLinear datasheet](docs/sp3222eey-l-datasheet.pdf) (21 pp, sha256 `657cf6a156b351de`, 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/sp3222eey-l-datasheet.pdf)

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