Specifications
| Type | Description |
|---|---|
| Part Number | TCA6416A |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | 24-pin TSSOP 7.80 mm x 4.40 mm; 24-pin WQFN 4.00 mm x 4.00 mm; 24-pin Microstar BGA Junior 3.00 mm x 3.00 mm |
| I/O Expansion Width | 16 bits; general-purpose parallel input/output expansion |
| Bus Interface | I2C and SMBus; two-line bidirectional bus protocol |
| Operating Supply Voltage Range | 1.65 V to 5.5 V; VCCI and VCCP, -40°C <= TA <= 85°C |
| Operating Supply Voltage Range | 1.65 V to 3.6 V; VCCI and VCCP, 85°C < TA <= 125°C |
| I2C Bus Clock Frequency | 100 kHz and 400 kHz; supports Standard-mode and Fast-mode |
| Standby Current | 3 uA; low standby current consumption |
| I/O Port Voltage Tolerance | 5 V tolerant; P-port I/O ports |
| Address Pin Capability | 2 devices on same I2C/SMBus bus; hardware address pin ADDR |
| Reset Input | Active-low RESET; hardware reset input |
| Interrupt Output | Open-drain active-low INT; interrupt output |
| Power-Up Port State | All channels configured as inputs at power-up |
| Input Noise Filter | Noise filter included on SCL and SDA inputs |
| Latch-Up Performance | >100 mA; per JESD 78, Class II |
| HBM ESD Rating | +/-2000 V; human-body model, ANSI/ESDA/JEDEC JS-001 |
| CDM ESD Rating | +/-1000 V; charged-device model, JEDEC JESD22-C101 |
| Absolute Maximum VCCI | -0.5 V to 6.5 V; supply voltage |
| Absolute Maximum VCCP | -0.5 V to 6.5 V; supply voltage |
| Absolute Maximum Input Voltage | -0.5 V to 6.5 V; VI input voltage |
| Absolute Maximum Output Voltage | -0.5 V to 6.5 V; VO output voltage |
| Input Clamp Current | +/-20 mA; ADDR, RESET, SCL; VI < 0 |
| Output Clamp Current | +/-20 mA; INT; VO < 0 |
| P-Port I/O Clamp Current | +/-20 mA; P port; VO < 0 or VO > VCCP |
| SDA I/O Clamp Current | +/-20 mA; SDA; VO < 0 or VO > VCCI |
| Continuous Output Low Current | 50 mA; P port, VO = 0 to VCCP |
| Continuous Output Low Current | 25 mA; SDA, INT; VO = 0 to VCCI |
| Continuous Output High Current | 50 mA; P port, 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 |
| Maximum Junction Temperature | 130°C; VCC <= 3.6 V |
| Maximum Junction Temperature | 90°C; 3.6 V < VCC <= 5.5 V |
| Storage Temperature | -65°C to 150°C; Tstg |
| High-Level Input Voltage | 0.7 x VCCI to VCCI; SCL, SDA |
| High-Level Input Voltage | 0.7 x VCCI to 5.5 V; RESET |
| High-Level Input Voltage | 0.7 x VCCP to 5.5 V; ADDR, P17-P00 |
| Low-Level Input Voltage | -0.5 V to 0.3 x VCCI; SCL, SDA, RESET |
| Low-Level Input Voltage | -0.5 V to 0.3 x VCCP; ADDR, P17-P00 |
| High-Level Output Current | 10 mA; P17-P00 |
| Low-Level Output Current | 25 mA; P17-P00, TJ <= 65°C |
| Low-Level Output Current | 18 mA; P17-P00, TJ <= 85°C |
| Low-Level Output Current | 9 mA; P17-P00, TJ <= 105°C |
| Low-Level Output Current | 4.5 mA; P17-P00, TJ <= 125°C |
| Low-Level Output Current | 3.5 mA; P17-P00, TJ <= 135°C |
| Operating Free-Air Temperature | -40°C to 125°C; 1.65 V <= VCC <= 3.6 V |
| Operating Free-Air Temperature | -40°C to 85°C; 3.6 V < VCC <= 5.5 V |
| Thermal Resistance Junction-to-Ambient | 108.8°C/W; PW 24-pin TSSOP |
| Thermal Resistance Junction-to-Ambient | 43.6°C/W; RTW 24-pin WQFN |
| Thermal Resistance Junction-to-Ambient | 159.2°C/W; ZQS 24-pin BGA Microstar Junior |
| Datasheet Status | request_only |
Product Overview
The TCA6416A is a Texas Instruments 16-bit I2C and SMBus I/O expander in the Signal_Chain category. It provides general-purpose parallel input/output expansion over a two-line bidirectional bus protocol, supporting 100 kHz Standard-mode and 400 kHz Fast-mode operation. At power-up, all channels are configured as inputs, and the device includes an active-low RESET input and an open-drain active-low INT output.
The device separates interface and port supply operation across VCCI and VCCP. The operating range is 1.65 V to 5.5 V for -40°C to 85°C operation, and 1.65 V to 3.6 V for operation above 85°C to 125°C. P-port I/O pins are 5 V tolerant, while SCL and SDA inputs include a noise filter.
Package options include 24-pin TSSOP, 24-pin WQFN, and 24-pin Microstar BGA Junior. Thermal resistance junction-to-ambient is specified as 108.8°C/W for PW TSSOP, 43.6°C/W for RTW WQFN, and 159.2°C/W for ZQS BGA.
Key Features
- 16-bit general-purpose parallel input/output expansion
- I2C and SMBus two-line bidirectional interface
- Supports 100 kHz and 400 kHz bus clocks
- 1.65 V to 5.5 V operation through 85°C
- 1.65 V to 3.6 V operation above 85°C
- 3 uA standby current consumption
- 5 V tolerant P-port I/O pins
- Hardware address pin supports two bus devices
- Active-low RESET hardware reset input
- Open-drain active-low INT interrupt output
- All channels configure as inputs at power-up
- SCL and SDA inputs include noise filtering
Typical Applications
- I2C-controlled parallel I/O expansion
- SMBus peripheral input monitoring
- GPIO expansion for host controllers
- Interrupt-based input change detection
- 5 V tolerant port interfacing
- Low-standby-current I/O expansion
Procurement Notes
When requesting a quote for TCA6416A, 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 type of device is the TCA6416A?
The TCA6416A is a Texas Instruments 16-bit I2C and SMBus I/O expander for general-purpose parallel input/output expansion over a two-line bidirectional bus.
What supply voltage range does TCA6416A support?
For VCCI and VCCP, the device operates from 1.65 V to 5.5 V from -40°C to 85°C, and from 1.65 V to 3.6 V when TA is above 85°C up to 125°C.
What happens to the ports at power-up?
At power-up, all TCA6416A channels are configured as inputs. The device also provides a hardware active-low RESET input for reset control.
Which packages are specified for TCA6416A?
The specified package options are 24-pin TSSOP at 7.80 mm x 4.40 mm, 24-pin WQFN at 4.00 mm x 4.00 mm, and 24-pin Microstar BGA Junior at 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: June 30, 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.