# UCD90120ARGCR

**Texas Instruments** · Monitors & Reset Circuits · VQFN-64-EP(9x9)

UCD90120ARGCR from Texas Instruments, in a VQFN-64-EP(9x9). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | MON1 | input | Analog voltage monitoring input with 0 V to 2.5 V range. |
| 2 | MON2 | input | Analog voltage monitoring input with 0 V to 2.5 V range. |
| 3 | MON3 | input | Analog voltage monitoring input with 0 V to 2.5 V range. |
| 4 | MON4 | input | Analog voltage monitoring input with 0 V to 2.5 V range. |
| 5 | MON5 | input | Analog voltage monitoring input with 0 V to 2.5 V range. |
| 6 | MON6 | input | Analog voltage monitoring input with 0 V to 2.5 V range. |
| 7 | V33DIO1 | power_in | Digital I/O 3.3 V power supply. |
| 8 | DVSS1 | power_in | Digital ground reference. |
| 9 | RESET | input | Active-low device reset input; hold low for at least 2 μs to reset device. |
| 10 | TRCK | output | Test return clock output. |
| 11 | GPIO1 | bidirectional | General-purpose digital input/output pin. |
| 12 | GPIO2 | bidirectional | General-purpose digital input/output pin. |
| 13 | GPIO3 | bidirectional | General-purpose digital input/output pin. |
| 14 | GPIO4 | bidirectional | General-purpose digital input/output pin. |
| 15 | PMBUS_CLK | tri_state | PMBus clock I/O pin; external pullup resistor to 3.3 V required. |
| 16 | PMBUS_DATA | tri_state | PMBus data I/O pin; external pullup resistor to 3.3 V required. |
| 17 | FPWM1/GPIO5 | bidirectional | Programmable PWM output (15.259 kHz to 125 MHz) or general-purpose I/O pin. |
| 18 | FPWM2/GPIO6 | bidirectional | Programmable PWM output (15.259 kHz to 125 MHz) or general-purpose I/O pin. |
| 19 | FPWM3/GPIO7 | bidirectional | Programmable PWM output (15.259 kHz to 125 MHz) or general-purpose I/O pin. |
| 20 | FPWM4/GPIO8 | bidirectional | Programmable PWM output (15.259 kHz to 125 MHz) or general-purpose I/O pin. |
| 21 | FPWM5/GPIO9 | bidirectional | Programmable PWM output (15.259 kHz to 125 MHz) or general-purpose I/O pin. |
| 22 | FPWM6/GPIO10 | bidirectional | Programmable PWM output (15.259 kHz to 125 MHz) or general-purpose I/O pin. |
| 23 | FPWM7/GPIO11 | bidirectional | Programmable PWM output (15.259 kHz to 125 MHz) or general-purpose I/O pin. |
| 24 | FPWM8/GPIO12 | bidirectional | Programmable PWM output (15.259 kHz to 125 MHz) or general-purpose I/O pin. |
| 25 | GPIO13 | bidirectional | General-purpose digital input/output pin. |
| 26 | DVSS2 | power_in | Digital ground reference. |
| 27 | PMBALERT# | tri_state | PMBus alert open-drain output (active-low); external pullup resistor to 3.3 V required. |
| 28 | PMBUS_CNTRL | input | PMBus control input pin. |
| 29 | GPIO14 | bidirectional | General-purpose digital input/output pin. |
| 30 | GPIO15 | bidirectional | General-purpose digital input/output pin. |
| 31 | PWM1/GPI1 | bidirectional | Fixed 10 kHz PWM output or general-purpose input pin. |
| 32 | PWM2/GPI2 | bidirectional | Fixed 1 kHz PWM output or general-purpose input pin. |
| 33 | GPIO16 | bidirectional | General-purpose digital input/output pin. |
| 34 | GPIO17 | bidirectional | General-purpose digital input/output pin. |
| 35 | GPIO18 | bidirectional | General-purpose digital input/output pin. |
| 36 | TCK/GPIO19 | bidirectional | Test clock input or general-purpose I/O pin. |
| 37 | TDO/GPIO20 | bidirectional | Test data out pin or general-purpose I/O pin. |
| 38 | TDI/GPIO21 | bidirectional | Test data in pin or general-purpose I/O; tie to 3.3 V with 10 kΩ resistor. |
| 39 | TMS/GPIO22 | bidirectional | Test mode select pin or general-purpose I/O; tie to 3.3 V with 10 kΩ resistor. |
| 40 | TRST | input | Test reset input pin; tie to ground with 10 kΩ resistor. |
| 41 | PWM4/GPI4 | bidirectional | Programmable PWM output (0.93 Hz to 7.8125 MHz) or general-purpose input pin. |
| 42 | PWM3/GPI3 | bidirectional | Programmable PWM output (0.93 Hz to 7.8125 MHz) or general-purpose input pin. |
| 43 | DVSS3 | power_in | Digital ground reference. |
| 44 | V33DIO2 | power_in | Digital I/O 3.3 V power supply. |
| 45 | V33D | power_in | Digital core 3.3 V power supply. |
| 46 | V33A | power_in | Analog 3.3 V power supply. |
| 47 | BPCap | passive | 1.8 V bypass capacitor connection. |
| 48 | AVSS2 | power_in | Analog ground reference. |
| 49 | AVSS1 | power_in | Analog ground reference. |
| 50 | MON10 | input | Analog voltage monitoring input with 0.2 V to 2.5 V range. |
| 51 | NC1 | unconnected | Not connected. |
| 52 | MON11 | input | Analog voltage monitoring input with 0.2 V to 2.5 V range. |
| 53 | NC2 | unconnected | Not connected. |
| 54 | MON12 | input | Analog voltage monitoring input with 0.2 V to 2.5 V range. |
| 55 | NC3 | unconnected | Not connected. |
| 56 | MON13 | input | Analog voltage monitoring input with 0.2 V to 2.5 V range. |
| 57 | NC4 | unconnected | Not connected. |
| 58 | V33FB | unconnected | Linear regulator feedback connection; leave unconnected. |
| 59 | MON7 | input | Analog voltage monitoring input with 0 V to 2.5 V range. |
| 60 | PMBUS_ADDR1 | input | PMBus analog address input (most-significant address bit). |
| 61 | PMBUS_ADDR0 | input | PMBus analog address input (least-significant address bit). |
| 62 | MON8 | input | Analog voltage monitoring input with 0 V to 2.5 V range. |
| 63 | MON9 | input | Analog voltage monitoring input with 0 V to 2.5 V range. |
| 64 | AVSS3 | power_in | Analog ground reference. |
| 65 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-64-EP(9x9) |
| Category | Power Supply Chip |
| Pins | 65 |

## CAD (KiCad official)

- Symbol: `UCD90120ARGCR`
- Footprint: `Package_DFN_QFN:QFN-64-1EP_9x9mm_P0.5mm_EP6x6mm`
- 3D model: VQFN-64-EP(9x9) (KiCad packages3D, STEP)
- 3D model files: `ucd90120argcr-etched.step` / `ucd90120argcr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucd90120argcr.step` / `ucd90120argcr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ucd90120a) (59 pp, sha256 `29657f8f074d2e8f`, retrieved 2026-10-05, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ucd90120argcr-datasheet.pdf)