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Contents

README

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STUSB1602AQTR

STMicroelectronics · USB Converters · QFN-24-EP(4x4)

STUSB1602AQTR from STMicroelectronics, in a QFN-24-EP(4x4). 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 CC1DB bidirectional Dead battery mode enable on CC1 pin, connect to CC1 when enabled or to ground when disabled
2 CC1 bidirectional Type-C configuration channel 1 for attachment detection, plug orientation determination, and system configuration management
3 VCONN power_in Power input for active cable supply, 5 V source with internal protection against short-circuit and overvoltage
4 CC2 bidirectional Type-C configuration channel 2 for attachment detection, plug orientation determination, and system configuration management
5 CC2DB bidirectional Dead battery mode enable on CC2 pin, connect to CC2 when enabled or to ground when disabled
6 RESET input Active high reset input for internal state initialization
7 SCL input I²C serial clock input, requires external pull-up resistor to MCU Vio
8 SDA bidirectional I²C serial data open drain bidirectional line, requires external pull-up resistor to MCU Vio
9 ALERT# tri_state I²C interrupt output, active low open drain, requires external pull-up resistor to MCU Vio
10 GND power_in Ground, common reference for all power and signal grounds
11 MOSI output Master out slave in: serial data output from STUSB1602 to MCU, BMC decoded from active CC line, valid on SCLK falling edge
12 NSS tri_state Chip select output, open drain active low, activates SPI/MSP interface
13 ADDR0 input I²C device address setting input, static configuration
14 MISO input Master in slave out: serial data input from MCU to STUSB1602, BMC encoded for CC line transmission, sampled on SCLK rising edge
15 TX_EN input Transmit enable input from MCU, enables BMC encoding and CC line driver when asserted
16 SCLK tri_state Serial clock output, open drain, drives SPI/MSP data transfer between MCU and STUSB1602, requires external pull-up
17 A_B_SIDE tri_state Cable orientation output, open drain active low, selects USB SuperSpeed signal routing based on CC attachment (HiZ for CC1, 0 for CC2)
18 VBUS_SENSE input VBUS voltage monitoring analog input for presence detection, voltage monitoring, and discharge control
19 VBUS_EN_SNK bidirectional VBUS sink power path enable, open drain active low, drives PMOS transistor gate when sink role established and VBUS in valid range
20 VBUS_EN_SRC bidirectional VBUS source power path enable, open drain active low, drives PMOS transistor gate when source role established and VBUS in valid range
21 VREG_1V2 power_out 1.2 V internal regulator output, connect 1 µF typical external decoupling capacitor (0.5-10 µF range)
22 VSYS power_in System power supply input 3.0 V to 5.5 V, or connect to ground if not used
23 VREG_2V7 power_out 2.7 V internal regulator output, connect 1 µF typical external decoupling capacitor (0.5-10 µF range)
24 VDD power_in Main power supply from USB power line 4.1 V to 22 V, supplies internal logic and VBUS switching control circuits
25 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package QFN-24-EP(4x4)
Category Interface
Pins 25

CAD (KiCad official)

  • Symbol: STUSB1602AQTR
  • Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm
  • 3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)
  • 3D model files: stusb1602aqtr-etched.step / stusb1602aqtr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stusb1602aqtr.step / stusb1602aqtr.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (39 pp, sha256 eb35151e98a6b9fb, retrieved 2026-10-03, tier: lcsc)
  • 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