SC16IS750

@@ -0,0 +1,68 @@+# SC16IS750++**NXP** · UART bridge · TSSOP-24++Adds a full UART to a host that talks I2C or SPI, so a microcontroller short on serial ports gains a hardware UART with a 64-byte transmit and receive FIFO. The bridge handles baud rates to 5 Mbps, full modem control lines, and hardware or software flow control, offloading the timing from the host. Eight of its pins double as GPIO, and an IRQ line signals events. A pin selects I2C or SPI. A common way to add a reliable UART to an I2C or SPI system.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | CTS | input | UART clear-to-send input (active LOW). A logic 0 indicates the modem/DTE is ready to accept transmit data. Status is readable via MSR[4]; only affects transmit when auto-CTS is enabled in EFR[7]. |+| 2 | TX | output | UART transmitter serial output. Disabled and internally looped back to RX during local Loopback mode. |+| 3 | RX | input | UART receiver serial input. Disabled in local Loopback mode where TX is internally routed to RX. |+| 4 | RESET | input | Device hardware reset, active LOW. See Section 7.4.1 for reset behavior. |+| 5 | XTAL1 | input | Crystal input or external clock input. A crystal can be tied between XTAL1 and XTAL2 to form the internal oscillator, or an external clock can drive this pin directly. |+| 6 | XTAL2 | output | Crystal oscillator output; used together with XTAL1 when a crystal is fitted. |+| 7 | VDD | power_in | Power supply, 2.5 V or 3.3 V nominal. |+| 8 | I2C/SPI | input | Interface select. Tie HIGH for I2C-bus target mode, LOW for SPI target mode. Determines the function of pins 9-13. |+| 9 | CS/A0 | input | In SPI mode: SPI chip-select input (Schmitt-trigger, active LOW). In I2C mode: device-address select bit A0 (combines with A1 to program the 7-bit target address; see Table 32). |+| 10 | SI/A1 | input | In SPI mode: SPI serial data input (MOSI). In I2C mode: device-address select bit A1 (combines with A0 to program the target address). |+| 11 | SO | tri_state | SPI serial data output (MISO), 3-stateable. In I2C mode this pin is undefined and must be left unconnected. |+| 12 | SCL/SCLK | input | Serial clock input. Acts as I2C-bus SCL when I2C is selected, or SPI SCLK when SPI is selected (SPI Mode 0, up to 4 Mbit/s on SC16IS750). |+| 13 | SDA | bidirectional | I2C-bus data line, open-drain, when I2C interface is selected. If SPI is selected this pin is undefined and must be tied to VSS. |+| 14 | IRQ | output | Interrupt output, open-drain, active LOW. Requires an external pull-up to VDD (~1 kΩ at 3.3 V, ~1.5 kΩ at 2.5 V). Asserts on enabled sources in the IER (line status, RX data available, TX empty, modem status, GPIO change). |+| 15 | GPIO0 | bidirectional | Programmable I/O pin with active pull-up (see Table 36). Direction, level, and interrupt behavior are set via the IODir/IOState/IOIntEna registers. |+| 16 | GPIO1 | bidirectional | Programmable I/O pin with active pull-up (see Table 36). |+| 17 | GPIO2 | bidirectional | Programmable I/O pin with active pull-up (see Table 36). |+| 18 | GPIO3 | bidirectional | Programmable I/O pin with active pull-up (see Table 36). |+| 19 | VSS | power_in | Device ground reference. |+| 20 | GPIO4/DSR | bidirectional | Programmable I/O pin, or modem DSR (Data Set Ready) input. Function is selected by IOControl register bit 1; active pull-up on input. |+| 21 | GPIO5/DTR | bidirectional | Programmable I/O pin, or modem DTR (Data Terminal Ready) output. Selected via IOControl bit 1. |+| 22 | GPIO6/CD | bidirectional | Programmable I/O pin, or modem CD (Carrier Detect) input. Selected via IOControl bit 1. |+| 23 | GPIO7/RI | bidirectional | Programmable I/O pin, or modem RI (Ring Indicator) input. Selected via IOControl bit 1. |+| 24 | RTS | output | UART request-to-send output, active LOW. Set by MCR[1] (or automatically driven when auto-RTS is enabled via EFR[6]); can also serve as the RS-485 driver direction-control signal. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | I2C/SPI-to-UART bridge |+| Channels | 1 UART |+| FIFO | 64 bytes (TX and RX) |+| Max baud | 5 Mbps |+| GPIO | 8 (shared) |+| Host interface | I2C or SPI (pin-selected) |+| Supply | 2.5-3.6 V |+| Package | TSSOP-24 |++## Ordering variants++- `SC16IS750IPW (TSSOP-24)`+- `SC16IS750IBS (HVQFN-24)`++## CAD (KiCad official)++- Symbol: `Interface_UART:SC16IS750xPW (KiCad official)`+- Footprint: `Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm`+- 3D model: TSSOP-24 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [NXP datasheet](https://www.nxp.com/docs/en/data-sheet/SC16IS740_750_760.pdf) (61 pp, sha256 `805796f4b2fd33e6`, 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/sc16is750-datasheet.pdf)

@@ -0,0 +1,39 @@+{+  "slug": "sc16is750",+  "version": "0.1.0",+  "type": "component",+  "description": "NXP I2C/SPI-to-UART bridge, TSSOP-24. Single UART with 64-byte FIFO, 8 GPIO, up to 5 Mbps. Datasheet-verified.",+  "tags": [+    "component",+    "interface",+    "uart-bridge",+    "i2c",+    "spi",+    "fifo",+    "tssop-24",+    "nxp"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "sc16is750.kicad_sym",+    "sc16is750.kicad_mod",+    "sc16is750.glb",+    "sc16is750.step",+    "sc16is750.lbr",+    "docs/hero.png",+    "docs/sc16is750-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file