ADS7843E

@@ -0,0 +1,58 @@+# ADS7843E++**Texas Instruments** · Touch Screen Controllers · SSOP-16-150mil++ADS7843E from Texas Instruments, in a SSOP-16-150mil. 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 | +VCC | power_in | Power Supply, 2.7V to 5V. Tied together with pin 10 (+VCC). |+| 2 | X+ | input | X+ Position Input. ADC input Channel 1. Connects to the X+ electrode of the resistive touch panel; also drivable by internal switch (~5Ω on-resistance) to +VCC. |+| 3 | Y+ | input | Y+ Position Input. ADC input Channel 2. Connects to the Y+ electrode of the resistive touch panel; also drivable by internal switch (~5Ω on-resistance) to +VCC. |+| 4 | X- | input | X- Position Input. Connects to the X- electrode of the resistive touch panel; also drivable by internal switch (~6Ω on-resistance) to GND. |+| 5 | Y- | input | Y- Position Input. Connects to the Y- electrode of the resistive touch panel; also drivable by internal switch (~6Ω on-resistance) to GND. |+| 6 | GND | power_in | Ground reference for both analog and digital sections. |+| 7 | IN3 | input | Auxiliary Input 1. ADC input Channel 3. General-purpose single-ended analog input, 0V to VREF range. |+| 8 | IN4 | input | Auxiliary Input 2. ADC input Channel 4. General-purpose single-ended analog input, 0V to VREF range. |+| 9 | VREF | input | Voltage Reference Input. Sets the ADC full-scale range; may be varied between 1V and +VCC (typical 2.5V). |+| 10 | +VCC | power_in | Power Supply, 2.7V to 5V. Tied together with pin 1 (+VCC). |+| 11 | PENIRQ | output | Pen Interrupt. Open-anode (open-drain) output that asserts low when the pen touches the panel; requires a 10kΩ to 100kΩ external pull-up resistor. |+| 12 | DOUT | tri_state | Serial Data Output (MISO). Data is shifted out on the falling edge of DCLK. Output is high-impedance when CS is HIGH. |+| 13 | BUSY | tri_state | Busy Output. Indicates a conversion is in progress. Output is high-impedance when CS is HIGH. |+| 14 | DIN | input | Serial Data Input (MOSI). If CS is LOW, data is latched on the rising edge of DCLK. |+| 15 | CS | input | Chip Select Input (active low). Controls conversion timing and enables the serial input/output register. |+| 16 | DCLK | input | External Clock Input (SCLK). This clock runs the SAR conversion process and synchronizes serial data I/O. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SSOP-16-150mil |+| Category | Data Acquisition |+| Pins | 16 |++## Ordering variants++Same part, different packaging or reel option.++- `ADS7843E`+- `ADS7843E/2K5`++## CAD (KiCad official)++- Symbol: `ADS7843E`+- Footprint: `Package_SO:SSOP-16_5.3x6.2mm_P0.65mm`+- 3D model: SSOP-16-150mil (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ads7843) (20 pp, sha256 `ea67b3946b732aa0`, 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/ads7843e-datasheet.pdf)

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