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Product Detailed Parameters
- Description：16-BIT TRANSLATING IC-BUS/SMBUS
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Number of I/O：16
- Interface：I2C, SMBus
- Interrupt Output：Yes
- Features：POR
- Output Type：Open Drain, Push-Pull
- Current - Output Source/Sink：10mA, 25mA
- Clock Frequency：1 MHz
- Voltage - Supply：1.08V ~ 3.6V
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：24-QFN
- Supplier Device Package：24-X2QFN (2x2)
- Grade：-
- Qualification：-
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Overview
The TCAL6416RDTOR is a 16-bit translating I2C-bus and SMBus I/O expander manufactured by Texas Instruments. It operates with supply voltages (VCCI and VCCP) ranging from 1.08V to 3.6V, supporting standard-mode (100kHz), fast-mode (400kHz), and fast-mode-plus (1MHz) clock frequencies. The device features bidirectional voltage-level translation between the I2C bus and P-ports, an active-low reset input, and an open-drain interrupt output. It utilizes a 24-pin DTO package (X2QFN, 2mm × 2mm).
Feature Summary
- Bidirectional voltage-level translation between I2C bus and P-ports for 1.2V, 1.8V, 2.5V, and 3.3V systems.
- Agile I/O configuration including programmable drive strength, internal pull-up/pull-down resistors, and latchable inputs.
- Active-low reset input that resets the I2C state machine while retaining sticky register values.
Applications
- Servers
- Telecom switching equipment (routers)
- Personal computers
- Industrial automation
Procurement Notes
Verify the specific ordering suffix DTOR against the manufacturer's current datasheet to confirm the package type and reel specifications. Ensure the component meets RoHS compliance requirements for your target market. Confirm availability through authorized distributors as stock levels fluctuate.
Selection Notes
Select this component when interfacing processors with lower supply voltages to peripherals requiring higher voltages. Ensure the design accommodates the 1.08V to 3.6V operating range for both VCCI and VCCP. Consider the 24-pin X2QFN package size for space-constrained PCB layouts.
Part Context
The TCAL6416R belongs to the TCAL6416R family of translating I/O expanders. It provides general-purpose parallel input and output expansion for two-line bidirectional I2C or SMBus protocols, featuring Agile I/O ports for enhanced performance in speed, power consumption, and EMI.
Replacement Considerations
Consult the manufacturer's cross-reference documentation for verified substitutes. Generic I/O expanders may not support the specific voltage translation or Agile I/O features required for direct replacement without circuit modification.
FAQ
How does the RESET pin affect the I/O pins?
The RESET pin only resets the I2C functional state machine. The I/O pins and sticky registers retain their last configured state during the reset process.
What is the purpose of the ADDR pin?
The ADDR pin allows hardware address selection, enabling two TCAL6416R devices to be connected on the same I2C or SMBus bus simultaneously.
Can the TCAL6416R directly drive LEDs?
Yes, the latched outputs have high-current drive capability for directly driving LEDs, but external resistance is recommended to limit current if necessary.
