SP3243EBEA-L

@@ -0,0 +1,72 @@+# SP3243EBEA-L++**MaxLinear** · RS232 ICs · SSOP-28-208mil++SP3243EBEA-L from MaxLinear, in a SSOP-28-208mil. 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 | C2+ | passive | Positive terminal of the inverting charge-pump flying capacitor C2 (0.1µF, 16V min). |+| 2 | C2- | passive | Negative terminal of the inverting charge-pump flying capacitor C2 (0.1µF, 16V min). |+| 3 | V- | power_out | Regulated -5.5V output generated by the internal charge pump. Bypass to GND with 0.1µF capacitor C4. |+| 4 | R1IN | input | RS-232 receiver 1 input. Accepts ±15V RS-232 line levels; internal 5kΩ pulldown commits output HIGH when open. |+| 5 | R2IN | input | RS-232 receiver 2 input. Feeds the always-active non-inverting receiver R2OUT (active in shutdown) as well as the standard R2OUT receiver. |+| 6 | R3IN | input | RS-232 receiver 3 input. Accepts ±15V RS-232 line levels; internal 5kΩ pulldown. |+| 7 | R4IN | input | RS-232 receiver 4 input. Accepts ±15V RS-232 line levels; internal 5kΩ pulldown. |+| 8 | R5IN | input | RS-232 receiver 5 input. Accepts ±15V RS-232 line levels; internal 5kΩ pulldown. |+| 9 | T1OUT | output | RS-232 driver 1 output. Delivers ±5.4V typical output swing into a 3kΩ load. |+| 10 | T2OUT | output | RS-232 driver 2 output. Delivers ±5.4V typical output swing into a 3kΩ load. |+| 11 | T3OUT | output | RS-232 driver 3 output. Delivers ±5.4V typical output swing into a 3kΩ load. |+| 12 | T3IN | input | TTL/CMOS driver 3 input. Logic threshold 0.8V LOW / 2.4V HIGH. Unused driver inputs should be tied to GND or VCC. |+| 13 | T2IN | input | TTL/CMOS driver 2 input. Logic threshold 0.8V LOW / 2.4V HIGH. |+| 14 | T1IN | input | TTL/CMOS driver 1 input. Logic threshold 0.8V LOW / 2.4V HIGH. |+| 15 | R5OUT | output | TTL/CMOS receiver 5 output. High-Z in shutdown or when AUTO ON-LINE is disabled. |+| 16 | R4OUT | output | TTL/CMOS receiver 4 output. High-Z in shutdown or when AUTO ON-LINE is disabled. |+| 17 | R3OUT | output | TTL/CMOS receiver 3 output. High-Z in shutdown or when AUTO ON-LINE is disabled. |+| 18 | R2OUT | output | TTL/CMOS receiver 2 output (inverting standard receiver). High-Z in shutdown or when AUTO ON-LINE is disabled. |+| 19 | R1OUT | output | TTL/CMOS receiver 1 output. High-Z in shutdown or when AUTO ON-LINE is disabled. |+| 20 | R2OUT_B | output | Non-inverting receiver-2 output; remains active during shutdown to monitor an external Ring Indicate signal. |+| 21 | STATUS | output | TTL/CMOS output indicating the AUTO ON-LINE / shutdown status of the transceiver. VOL ≤ 0.4V @ IOUT=1.6mA; VOH ≥ VCC-0.6V @ IOUT=-1.0mA. |+| 22 | SHUTDOWN | input | Active-LOW shutdown input. Logic LOW shuts down drivers and charge pump, overriding AUTO ON-LINE and ONLINE. Refer to Table 2 truth table. |+| 23 | ONLINE | input | Active-LOW AUTO ON-LINE enable. Apply logic HIGH to override AUTO ON-LINE circuitry and force drivers active (SHUTDOWN must also be HIGH). |+| 24 | C1- | passive | Negative terminal of the voltage-doubler charge-pump flying capacitor C1 (0.1µF, 16V min). |+| 25 | GND | power_in | Device ground reference. |+| 26 | VCC | power_in | +3.0V to +5.5V supply input. Bypass to GND with 0.1µF capacitor C5. |+| 27 | V+ | power_out | Regulated +5.5V output generated by the internal charge pump. Bypass to GND with 0.1µF capacitor C3. |+| 28 | C1+ | passive | Positive terminal of the voltage-doubler charge-pump flying capacitor C1 (0.1µF, 16V min). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | MaxLinear |+| Package | SSOP-28-208mil |+| Category | Interface |+| Pins | 28 |++## Ordering variants++- `SP3243EBEA-L`+- `SP3243EBEA-LEBCA`+- `SP3243EBEA-LEBCA-L`+- `SP3243EBEA-LEBUA`+- `SP3243EBEA-LEBUA-L`+- `SP3243EBEA-LEUCR`++## CAD (KiCad official)++- Symbol: `SP3243EBEA-L`+- Footprint: `Package_SO:SSOP-28_5.3x10.2mm_P0.65mm`+- 3D model: SSOP-28-208mil (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [MaxLinear datasheet](docs/sp3243ebea-l-datasheet.pdf) (24 pp, sha256 `b138bf5034e0cd89`, retrieved 2026-08-17, tier: manufacturer)+- **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/sp3243ebea-l-datasheet.pdf)

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