Specifications
| Type | Description |
|---|---|
| Part Number | TCA6416 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | TSSOP-24 7.80 mm x 4.40 mm; WQFN-24 4.00 mm x 4.00 mm; BGA-24 3.00 mm x 3.00 mm |
| Interface type | I2C and SMBus; two-line bidirectional bus using SCL and SDA |
| I/O expansion width | 16 bit; P-port GPIO expander |
| Recommended VCCI supply voltage | 1.65-5.5 V; I2C bus supply voltage |
| Recommended VCCP supply voltage | 1.65-5.5 V; P-port supply voltage |
| I2C bus speed | 400 kHz; Fast-mode I2C bus |
| Standby current | 1 uA; low standby current consumption stated in features |
| Power-up I/O state | All channels configured as inputs at power up |
| Reset input | Active-low RESET; connect to VCCP through pullup resistor if no active connection is used |
| Interrupt output | Open-drain active-low INT; connect to VCCI or VCCP through pullup resistor |
| Address pin | ADDR selects fixed I2C address; connect directly to VCCP or ground; allows up to two devices on same bus |
| Absolute maximum VCCI | -0.5 to 6.5 V; supply voltage range |
| Absolute maximum VCCP | -0.5 to 6.5 V; supply voltage range |
| Absolute maximum input voltage | -0.5 to 6.5 V; input voltage range |
| Absolute maximum output voltage | -0.5 to 6.5 V; output voltage range |
| Input clamp current | +/-20 mA; ADDR, RESET, SCL; VI < 0 |
| Output clamp current | +/-20 mA; INT; VO < 0 |
| P-port input/output clamp current | +/-20 mA; VO < 0 or VO > VCCP |
| SDA input/output clamp current | +/-20 mA; VO < 0 or VO > VCCI |
| P-port continuous output low current | 25 mA; VO = 0 to VCCP |
| SDA and INT continuous output low current | 15 mA; VO = 0 to VCCI |
| P-port continuous output high current | 25 mA; VO = 0 to VCCP |
| Continuous current through GND | 200 mA; absolute maximum rating |
| Continuous current through VCCP | 160 mA; absolute maximum rating |
| Continuous current through VCCI | 10 mA; absolute maximum rating |
| Storage temperature | -65 to 150 °C; handling rating |
| ESD HBM rating | 2000 V; ANSI/ESDA/JEDEC JS-001, all pins |
| ESD CDM rating | 1000 V; JEDEC JESD22-C101, all pins |
| SCL/SDA high-level input voltage | 0.7 x VCCI to 5.5 V; recommended operating conditions |
| ADDR/P-port/RESET high-level input voltage | 0.7 x VCCP to 5.5 V; recommended operating conditions |
| SCL/SDA low-level input voltage | -0.5 to 0.3 x VCCI V; recommended operating conditions |
| ADDR/P-port/RESET low-level input voltage | -0.5 to 0.3 x VCCP V; recommended operating conditions |
| Recommended P-port high-level output current | 10 mA; P17-P00 |
| Recommended P-port low-level output current | 25 mA; P17-P00 |
| Operating free-air temperature | -40 to 85 °C; recommended operating conditions |
| Package thermal impedance | 88 °C/W; PW package, JESD51-7 |
| Package thermal impedance | 66 °C/W; RTW package, JESD51-7 |
| Package thermal impedance | 171.6 °C/W; ZQS package, JESD51-7 |
| Input diode clamp voltage | -1.2 V max; II = -18 mA, VCCP = 1.65 V to 5.5 V |
| Power-on reset voltage | 1 V min, 1.4 V max; VI = VCCP or GND, IO = 0, VCCP = 1.65 V to 5.5 V |
| P-port high-level output voltage | 1.2 V min; VCCP = 1.65 V, IOH = -8 mA |
| P-port high-level output voltage | 1.8 V min; VCCP = 2.3 V, IOH = -8 mA |
| P-port high-level output voltage | 2.6 V min; VCCP = 3 V, IOH = -8 mA |
| P-port high-level output voltage | 4.1 V min; VCCP = 4.5 V, IOH = -8 mA |
| P-port high-level output voltage | 1.0 V min; VCCP = 1.65 V, IOH = -10 mA |
| P-port high-level output voltage | 4.0 V min; VCCP = 4.5 V, IOH = -10 mA |
| P-port low-level output voltage | 0.45 V max; VCCP = 1.65 V, IOL = 8 mA |
| P-port low-level output voltage | 0.25 V max; VCCP = 2.3 V, IOL = 8 mA |
| P-port low-level output voltage | 0.23 V max; VCCP = 4.5 V, IOL = 8 mA |
| P-port low-level output voltage | 0.6 V max; VCCP = 1.65 V, IOL = 10 mA |
| SDA low-level output current | 3 mA min; VOL = 0.4 V, VCCP = 1.65 V to 5.5 V |
| INT low-level output current | 3 mA min, 15 mA max; VOL = 0.4 V, VCCP = 1.65 V to 5.5 V |
| SCL/SDA input leakage current | +/-0.1 uA max; VI = VCCI or GND, VCCP = 1.65 V to 5.5 V |
| ADDR/RESET input leakage current | +/-0.1 uA max; VI = VCCP or GND, VCCP = 1.65 V to 5.5 V |
| P-port high-level input leakage current | 1 uA max; VI = VCCP, VCCP = 1.65 V to 5.5 V |
| P-port low-level input leakage current | 1 uA max; VI = GND, VCCP = 1.65 V to 5.5 V |
| Supply current ICC | 7.8 uA typ, 30 uA max; SDA = VCCI or GND; P-port, ADDR, RESET = VCCP; IO = 0; I/O inputs; fSCL = 400 kHz |
| Supply current ICC | 1.7 uA typ, 10 uA max; SDA = VCCI or GND; P-port, ADDR, RESET = VCCP; IO = 0; I/O inputs; fSCL = 100 kHz |
| Supply current ICC | 0.1 uA typ, 2 uA max; SCL/SDA = VCCI or GND; P-port, ADDR, RESET = VCCP; IO = 0; I/O inputs; fSCL = 0 |
| Delta ICCI | 25 uA max; SCL/SDA one input at VCCI - 0.6 V, other inputs at VCCI or GND |
| Delta ICCP | 60 uA max; P-port, ADDR, RESET one input at VCCP - 0.6 V, other inputs at VCCP or GND |
| SCL input capacitance | 6 pF typ, 7 pF max; VI = VCCI or GND, VCCP = 1.65 V to 5.5 V |
| SDA I/O capacitance | 7 pF typ, 8 pF max; VIO = VCCI or GND, VCCP = 1.65 V to 5.5 V |
| P-port I/O capacitance | 7.5 pF typ, 8.5 pF max; VIO = VCCP or GND, VCCP = 1.65 V to 5.5 V |
| Datasheet Status | request_only |
Product Overview
The Texas Instruments TCA6416 is a 16-bit I2C SMBus I/O expander in the Signal_Chain category. It uses a two-line bidirectional bus with SCL and SDA and supports Fast-mode I2C bus operation to 400 kHz. The P-port provides 16 bits of GPIO expansion, and all channels are configured as inputs at power up.
The device uses separate recommended supply ranges for VCCI and VCCP, both specified from 1.65 V to 5.5 V. SCL and SDA input thresholds reference VCCI, while ADDR, RESET, and P-port input thresholds reference VCCP. The active-low RESET input can be pulled to VCCP when unused, and the open-drain active-low INT output requires a pullup to VCCI or VCCP.
Package options include TSSOP-24 7.80 mm x 4.40 mm, WQFN-24 4.00 mm x 4.00 mm, and BGA-24 3.00 mm x 3.00 mm. Thermal impedance is specified as 88 °C/W for PW, 66 °C/W for RTW, and 171.6 °C/W for ZQS packages.
Key Features
- 16-bit P-port GPIO expansion
- I2C and SMBus two-line bidirectional interface
- Fast-mode I2C bus speed to 400 kHz
- 1.65-5.5 V recommended VCCI supply range
- 1.65-5.5 V recommended VCCP supply range
- 1 uA standby current stated in features
- All channels configure as inputs at power up
- Active-low RESET input with VCCP pullup option
- Open-drain active-low INT output with pullup requirement
- ADDR pin allows up to two devices on one bus
- -40 to 85 °C operating free-air temperature
- TSSOP-24, WQFN-24, and BGA-24 package options
Typical Applications
- I2C GPIO expansion
- SMBus I/O expansion
- Two-device shared-bus GPIO designs
- Low-standby-current digital interfaces
- Interrupt-driven input monitoring
- 1.65-5.5 V logic systems
- Power-up input-default GPIO systems
Procurement Notes
When requesting a quote for TCA6416, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What interface does the TCA6416 use for control?
The TCA6416 uses I2C and SMBus control over a two-line bidirectional bus with SCL and SDA. The extracted facts list Fast-mode I2C bus operation at 400 kHz.
How many GPIO lines does the TCA6416 provide?
The TCA6416 provides 16-bit P-port GPIO expansion. According to the extracted facts, all channels are configured as inputs at power up.
What supply voltage ranges are recommended for TCA6416?
The recommended VCCI supply voltage for the I2C bus is 1.65-5.5 V, and the recommended VCCP supply voltage for the P-port is also 1.65-5.5 V.
How are RESET and INT handled on the TCA6416?
RESET is an active-low input and should be connected to VCCP through a pullup resistor if no active connection is used. INT is an open-drain active-low output that should be pulled up to VCCI or VCCP.
What packages are listed for the TCA6416?
The listed package options are TSSOP-24 measuring 7.80 mm x 4.40 mm, WQFN-24 measuring 4.00 mm x 4.00 mm, and BGA-24 measuring 3.00 mm x 3.00 mm.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 8, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.