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TCAL6416RTWR

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Texas Instruments I/O Expanders, WQFN-24(4x4). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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docs tcal6416rtwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
viewers tcal6416rtwr: viewers · Ray 1mo ago
package.json Publish 0.1.0 · Ray 1mo ago
page.json tcal6416rtwr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1d ago
README.md tcal6416rtwr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 16d ago
tcal6416rtwr-etched.fit.json tcal6416rtwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
tcal6416rtwr-etched.glb tcal6416rtwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
tcal6416rtwr-etched.step tcal6416rtwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
tcal6416rtwr.glb Publish 0.1.0 · Ray 1mo ago
tcal6416rtwr.kicad_mod Publish 0.1.0 · Ray 1mo ago
tcal6416rtwr.kicad_sym Publish 0.1.0 · Ray 1mo ago
tcal6416rtwr.lbr Publish 0.1.0 · Ray 1mo ago
tcal6416rtwr.step Publish 0.1.0 · Ray 1mo ago

TCAL6416RTWR

Texas Instruments · I/O Expanders · WQFN-24(4x4)

TCAL6416RTWR from Texas Instruments, in a WQFN-24(4x4). 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 P00 bidirectional P-port 0 input/output (push-pull design structure). At power-on, P00 is configured as an input.
2 P01 bidirectional P-port 1 input/output (push-pull). At power-on, P01 is configured as an input.
3 P02 bidirectional P-port 2 input/output (push-pull). At power-on, P02 is configured as an input.
4 P03 bidirectional P-port 3 input/output (push-pull). At power-on, P03 is configured as an input.
5 P04 bidirectional P-port 4 input/output (push-pull). At power-on, P04 is configured as an input.
6 P05 bidirectional P-port 5 input/output (push-pull). At power-on, P05 is configured as an input.
7 P06 bidirectional P-port 6 input/output (push-pull). At power-on, P06 is configured as an input.
8 P07 bidirectional P-port 7 input/output (push-pull). At power-on, P07 is configured as an input.
9 GND power_in Device ground.
10 P10 bidirectional P-port 10 input/output (push-pull). At power-on, P10 is configured as an input.
11 P11 bidirectional P-port 11 input/output (push-pull). At power-on, P11 is configured as an input.
12 P12 bidirectional P-port 12 input/output (push-pull). At power-on, P12 is configured as an input.
13 P13 bidirectional P-port 13 input/output (push-pull). At power-on, P13 is configured as an input.
14 P14 bidirectional P-port 14 input/output (push-pull). At power-on, P14 is configured as an input.
15 P15 bidirectional P-port 15 input/output (push-pull). At power-on, P15 is configured as an input.
16 P16 bidirectional P-port 16 input/output (push-pull). At power-on, P16 is configured as an input.
17 P17 bidirectional P-port 17 input/output (push-pull). At power-on, P17 is configured as an input.
18 ADDR input I2C address-select input. Tie directly to VCCP or GND to select one of two possible I2C slave addresses; allows two TCAL6416 devices on the same bus.
19 SCL input I2C serial clock input. Connect to VCCI through a pull-up resistor. Supports 100 kHz standard, 400 kHz fast, and 1 MHz fast-mode-plus.
20 SDA bidirectional I2C serial data (open-drain, bidirectional). Connect to VCCI through a pull-up resistor.
21 VCCP power_in Supply voltage for the P-port side (P00-P17). Operating range 1.08 V to 3.6 V; enables voltage-level translation independent of VCCI.
22 INT output Active-low open-drain interrupt output. Connect to VCCI or VCCP through a pull-up resistor. Asserts when any input P-port changes state (subject to interrupt mask register).
23 VCCI power_in Supply voltage for the I2C-bus side. Connect directly to the supply voltage of the external I2C controller. Operating range 1.08 V to 3.6 V.
24 RESET input Active-low reset input. Connect to VCCI through a pull-up resistor if no active connection is used. Forces all registers to their default (power-on) state when driven low.
25 EP passive Exposed thermal/center pad on the WQFN underside. Must be connected as a secondary ground or left electrically open (per Figure 5-2 note).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package WQFN-24(4x4)
Category Comm/UART
Pins 25

Ordering variants

Same part, different packaging or reel option.

  • TCAL6416RTWR
  • TCAL6416RTWRRTWT
  • TCAL6416RTWRPW
  • TCAL6416RTWRPWR

CAD (KiCad official)

  • Symbol: TCAL6416RTWR
  • Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm
  • 3D model: WQFN-24(4x4) (KiCad packages3D, STEP)
  • 3D model files: tcal6416rtwr-etched.step / tcal6416rtwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tcal6416rtwr.step / tcal6416rtwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (53 pp, sha256 741d66f5bb7613d2, 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