GN1668T

@@ -0,0 +1,65 @@+# GN1668T++**GN Semic** · LED Display Drivers · SSOP-24-150mil++GN1668T from GN Semic, in a SSOP-24-150mil. 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 | DIO | bidirectional | Serial data I/O for the 3-wire interface. N-channel open-drain output with internal pull-up resistor; external pull-up not required for typical operation. |+| 2 | CLK | input | Serial clock input for the 3-wire interface. Data on DIO is latched on the clock edges; PWCLK min 400 ns, Fmax = 1 MHz at 50% duty. |+| 3 | STB | input | Strobe / chip-select input. A high-to-low edge on STB begins a new instruction/data frame on DIO; taking STB high aborts the current transfer. |+| 4 | K1 | input | Keyboard-matrix return line 1. Internal pull-down resistor (typ. 10 kΩ); asserted high by the SEG/KS scan driver when a key on the K1 row is pressed. |+| 5 | K2 | input | Keyboard-matrix return line 2. Internal pull-down resistor (typ. 10 kΩ); asserted high by the SEG/KS scan driver when a key on the K2 row is pressed. |+| 6 | VDD | power_in | Positive supply input. Recommended operating range 3.0 V to 5.5 V (typ. 5 V); absolute max +7 V. Typical quiescent IDD = 130 µA (no load). |+| 7 | SEG1/KS1 | output | Multiplexed segment-drive / key-scan output 1. P-channel open-drain sink to VDD; -50 mA max source per SEG. Drives display segments in display cycles and asserts the K1/K2 row during keyboard scan. |+| 8 | SEG2/KS2 | output | Multiplexed segment-drive / key-scan output 2. P-channel open-drain, -50 mA max. |+| 9 | SEG3/KS3 | output | Multiplexed segment-drive / key-scan output 3. P-channel open-drain, -50 mA max. |+| 10 | SEG4/KS4 | output | Multiplexed segment-drive / key-scan output 4. P-channel open-drain, -50 mA max. |+| 11 | SEG5/KS5 | output | Multiplexed segment-drive / key-scan output 5. P-channel open-drain, -50 mA max. |+| 12 | SEG6/KS6 | output | Multiplexed segment-drive / key-scan output 6. P-channel open-drain, -50 mA max. |+| 13 | SEG7/KS7 | output | Multiplexed segment-drive / key-scan output 7. P-channel open-drain, -50 mA max. |+| 14 | SEG8/KS8 | output | Multiplexed segment-drive / key-scan output 8. P-channel open-drain, -50 mA max. |+| 15 | SEG9/KS9 | output | Multiplexed segment-drive / key-scan output 9. P-channel open-drain, -50 mA max. |+| 16 | SEG10/KS10 | output | Multiplexed segment-drive / key-scan output 10. P-channel open-drain, -50 mA max. |+| 17 | SEG12/GRID7 | output | Multiplexed segment / grid (digit) output. Push-pull P/N-channel open-drain output - acts as SEG12 in 13-segment/4-grid mode, or as GRID7 in 10-segment/7-grid mode. |+| 18 | SEG13/GRID6 | output | Multiplexed segment / grid output. Push-pull P/N-channel open-drain output; SEG13 in 13-seg/4-grid mode, GRID6 in 11-seg/6-grid mode. |+| 19 | SEG14/GRID5 | output | Multiplexed segment / grid output. Push-pull P/N-channel open-drain output; SEG14 in 13-seg/4-grid mode, GRID5 in 12-seg/5-grid mode. |+| 20 | GRID4 | output | Grid (digit common) output 4. N-channel open-drain output; +150 mA max sink, VOL = 0.3 V at 100 mA typ. Drives one common-cathode digit. |+| 21 | GRID3 | output | Grid (digit common) output 3. N-channel open-drain output; +150 mA max sink. |+| 22 | GND | power_in | Ground / reference (0 V). Common return for supply and all outputs. |+| 23 | GRID2 | output | Grid (digit common) output 2. N-channel open-drain output; +150 mA max sink. |+| 24 | GRID1 | output | Grid (digit common) output 1. N-channel open-drain output; +150 mA max sink. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | GN Semic |+| Package | SSOP-24-150mil |+| Category | LED-drv |+| Pins | 24 |++## Ordering variants++- `GN1668TT`+- `GN1668T`++## CAD (KiCad official)++- Symbol: `GN1668T`+- Footprint: `Package_SO:SSOP-24_5.3x8.2mm_P0.65mm`+- 3D model: SSOP-24-150mil (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [GN Semic datasheet](docs/gn1668t-datasheet.pdf) (16 pp, sha256 `23e60bbc70cfe4a2`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/gn1668t-datasheet.pdf)

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