Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| GPIO | 16 configurable I/O pins |
| Voltage Translation | 1.65 V to 5.5 V host/P-port domains |
| Bus | I²C/SMBus up to 400 kHz |
| Addressing | 1 address pin; up to 2 devices |
| Control | Active-low RESET and INT |
| Startup | All I/O inputs; no-glitch power-up |
| Standby | 3 µA stated standby current |
| Exact Package / Packing | WQFN (RTW), 24 pins, 4 mm × 4 mm; 3000-piece large tape and reel |
Product Overview
TCA6416ARTWR scales the translating TCA64xx architecture to 16 GPIOs. It is useful when a processor with limited low-voltage pins must control or monitor a larger higher-voltage peripheral bank through one I²C interface.
The two 8-bit banks share one interrupt/reset framework and register interface, so firmware gains pin count without 16 direct MCU pins. Hardware reset returns the device to input defaults if software loses synchronization.
RTWR is the 4 mm WQFN 3000-piece reel option. It saves board area versus a TSSOP-24 implementation but needs correct exposed-pad soldering and routing fan-out.
For related devices, see HKEQGOO’s I/O Expanders category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TCA6416ARTWR |
| GPIO | 16 configurable I/O pins |
| Voltage Translation | 1.65 V to 5.5 V host/P-port domains |
| Bus | I²C/SMBus up to 400 kHz |
| Addressing | 1 address pin; up to 2 devices |
| Control | Active-low RESET and INT |
| Startup | All I/O inputs; no-glitch power-up |
| Standby | 3 µA stated standby current |
| Exact Package / Packing | WQFN (RTW), 24 pins, 4 mm × 4 mm; 3000-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | PH416A |
Functional Highlights
16-bit expansion can replace many discrete level translators plus GPIO pins
When the P-port and I²C domains differ, one TCA6416A can combine level-domain bridging with remote digital control. It is not intended for high-speed data signals; these are control/status GPIOs.
One address pin limits same-bus population
Only two address selections are available, so designs needing many identical 16-bit expanders must plan muxing/additional buses or choose a family with more address combinations.
Design Considerations
- Plan bus topology early if more than two TCA6416A devices would share one I²C segment.
- Initialize output data before direction changes to prevent undesired external switching.
- Treat QFN pad/thermal ground assembly as part of production validation.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists TCA6416ARTWR as Active / Production; WQFN (RTW), 24 pins; 3000-piece large tape and reel; Level-2-260C-1 YEAR; −40°C to +85°C; marking PH416A.
Related Engineering Resources
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