HTM1640

@@ -0,0 +1,71 @@+# HTM1640++**TDSEMIC** · LED Drivers · SSOP-28++HTM1640 from TDSEMIC, in a SSOP-28. 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 | GRID12 | output | Digit (grid) output 12. N-channel open-drain output driving a common-cathode digit line; up to 200 mA sink current. |+| 2 | GRID13 | output | Digit (grid) output 13. N-channel open-drain output driving a common-cathode digit line. |+| 3 | GRID14 | output | Digit (grid) output 14. N-channel open-drain output driving a common-cathode digit line. |+| 4 | GRID15 | output | Digit (grid) output 15. N-channel open-drain output driving a common-cathode digit line. |+| 5 | GRID16 | output | Digit (grid) output 16. N-channel open-drain output driving a common-cathode digit line. |+| 6 | VSS | power_in | Logic ground. Connect to system ground (0 V). Also labeled GND on the pinout diagram. |+| 7 | DIN | input | Serial data input. Data is changed while SCLK is low and latched when SCLK is high; transmitted LSB first. Also labeled DATA on the pinout diagram. |+| 8 | SCLK | input | Serial clock input. Data on DIN is sampled on the rising edge. VIH = 0.7*VDD, VIL = 0.3*VDD, 0.35 V hysteresis. Also labeled CLK on the pinout diagram. |+| 9 | SEG1 | output | Segment output 1. P-channel open-drain (source) output driving an LED anode line; up to 50 mA source current. |+| 10 | SEG2 | output | Segment output 2. P-channel open-drain (source) output driving an LED anode line. |+| 11 | SEG3 | output | Segment output 3. P-channel open-drain (source) output driving an LED anode line. |+| 12 | SEG4 | output | Segment output 4. P-channel open-drain (source) output driving an LED anode line. |+| 13 | SEG5 | output | Segment output 5. P-channel open-drain (source) output driving an LED anode line. |+| 14 | SEG6 | output | Segment output 6. P-channel open-drain (source) output driving an LED anode line. |+| 15 | SEG7 | output | Segment output 7. P-channel open-drain (source) output driving an LED anode line. |+| 16 | SEG8 | output | Segment output 8. P-channel open-drain (source) output driving an LED anode line. |+| 17 | VDD | power_in | Logic power supply. Recommended 5 V ±10% (3.0 V to 5.5 V operating range). Absolute maximum -0.5 V to +7.0 V. |+| 18 | GRID1 | output | Digit (grid) output 1. N-channel open-drain output driving a common-cathode digit line; up to 200 mA sink current. |+| 19 | GRID2 | output | Digit (grid) output 2. N-channel open-drain output driving a common-cathode digit line. |+| 20 | GRID3 | output | Digit (grid) output 3. N-channel open-drain output driving a common-cathode digit line. |+| 21 | GRID4 | output | Digit (grid) output 4. N-channel open-drain output driving a common-cathode digit line. |+| 22 | GRID5 | output | Digit (grid) output 5. N-channel open-drain output driving a common-cathode digit line. |+| 23 | GRID6 | output | Digit (grid) output 6. N-channel open-drain output driving a common-cathode digit line. |+| 24 | GRID7 | output | Digit (grid) output 7. N-channel open-drain output driving a common-cathode digit line. |+| 25 | GRID8 | output | Digit (grid) output 8. N-channel open-drain output driving a common-cathode digit line. |+| 26 | GRID9 | output | Digit (grid) output 9. N-channel open-drain output driving a common-cathode digit line. |+| 27 | GRID10 | output | Digit (grid) output 10. N-channel open-drain output driving a common-cathode digit line. |+| 28 | GRID11 | output | Digit (grid) output 11. N-channel open-drain output driving a common-cathode digit line. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | TDSEMIC |+| Package | SSOP-28 |+| Category | LED Drivers |+| Pins | 28 |++## Ordering variants++Same part, different packaging or reel option.++- `HTM1640SSOP28`+- `HTM1640SOP28`++## CAD (KiCad official)++- Symbol: `HTM1640`+- Footprint: `Package_SO:SSOP-28_5.3x10.2mm_P0.65mm`+- 3D model: SSOP-28 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [TDSEMIC datasheet](docs/htm1640-datasheet.pdf) (14 pp, sha256 `da626725a5629030`, 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/htm1640-datasheet.pdf)

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