GT4899QE

@@ -0,0 +1,57 @@+# GT4899QE++**GTIC** · Analog Switches, Multiplexers · QFN-16L-EP(3x3)++GT4899QE from GTIC, in a QFN-16L-EP(3x3). 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 | NC1 | passive | Normally-closed terminal of switch 1. Connected to COM1 when IN1-2 = 0. Analog signal range 0 to VCC. |+| 2 | IN1-2 | input | Digital logic select input controlling both switch 1 and switch 2. IN1-2=0 routes NC1↔COM1 and NC2↔COM2; IN1-2=1 routes NO1↔COM1 and NO2↔COM2. TTL/CMOS compatible (VINH ≥ 1.8 V at VCC=4.5V). |+| 3 | NO2 | passive | Normally-open terminal of switch 2. Connected to COM2 when IN1-2 = 1. Analog signal range 0 to VCC. |+| 4 | COM2 | passive | Common terminal of switch 2. Bidirectional analog port that routes to either NC2 or NO2 depending on IN1-2. |+| 5 | NC2 | passive | Normally-closed terminal of switch 2. Connected to COM2 when IN1-2 = 0. Analog signal range 0 to VCC. |+| 6 | GND | power_in | Ground reference. Connect to system ground. |+| 7 | NO3 | passive | Normally-open terminal of switch 3. Connected to COM3 when IN3-4 = 1. Analog signal range 0 to VCC. |+| 8 | COM3 | passive | Common terminal of switch 3. Bidirectional analog port that routes to either NC3 or NO3 depending on IN3-4. |+| 9 | NC3 | passive | Normally-closed terminal of switch 3. Connected to COM3 when IN3-4 = 0. Analog signal range 0 to VCC. |+| 10 | IN3-4 | input | Digital logic select input controlling both switch 3 and switch 4. IN3-4=0 routes NC3↔COM3 and NC4↔COM4; IN3-4=1 routes NO3↔COM3 and NO4↔COM4. TTL/CMOS compatible. |+| 11 | NO4 | passive | Normally-open terminal of switch 4. Connected to COM4 when IN3-4 = 1. Analog signal range 0 to VCC. |+| 12 | COM4 | passive | Common terminal of switch 4. Bidirectional analog port that routes to either NC4 or NO4 depending on IN3-4. |+| 13 | NC4 | passive | Normally-closed terminal of switch 4. Connected to COM4 when IN3-4 = 0. Analog signal range 0 to VCC. |+| 14 | VCC | power_in | Supply voltage input. Operating range 1.65 V to 5.5 V (absolute max 6.0 V). Bypass to GND with a 0.1 µF ceramic capacitor near the pin. |+| 15 | NO1 | passive | Normally-open terminal of switch 1. Connected to COM1 when IN1-2 = 1. Analog signal range 0 to VCC. |+| 16 | COM1 | passive | Common terminal of switch 1. Bidirectional analog port that routes to either NC1 or NO1 depending on IN1-2. |+| 17 | EP | passive | Exposed thermal pad on the underside of the QFN3x3-16L package (center pad, labeled '17' in Fig.5-1). Recommend soldering to the PCB ground plane for mechanical stability and thermal dissipation. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | GTIC |+| Package | QFN-16L-EP(3x3) |+| Category | Interface |+| Pins | 17 |++## Ordering variants++- `GT4899QEQE`+- `GT4899QEUE`++## CAD (KiCad official)++- Symbol: `GT4899QE`+- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`+- 3D model: QFN-16L-EP(3x3) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [GTIC datasheet](docs/gt4899qe-datasheet.pdf) (13 pp, sha256 `d87b129b42a0dd9a`, 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/gt4899qe-datasheet.pdf)

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