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TCAL6408

ACTIVE

8-bit translating I²C-bus/SMBus I/O expander with interrupt, reset, and agile I/O

Product details

Number of I/Os 8 Features 1-MHz maximum frequency, Adjustable I/O level, Configuration registers, Interrupt pin, Reset pin Supply voltage (min) (V) 1.08 Supply voltage (max) (V) 3.6 Addresses 2 Rating Catalog Frequency (max) (MHz) 1 Operating temperature range (°C) -40 to 125
Number of I/Os 8 Features 1-MHz maximum frequency, Adjustable I/O level, Configuration registers, Interrupt pin, Reset pin Supply voltage (min) (V) 1.08 Supply voltage (max) (V) 3.6 Addresses 2 Rating Catalog Frequency (max) (MHz) 1 Operating temperature range (°C) -40 to 125
TSSOP (PW) 16 32 mm² 5 x 6.4 UQFN (RSV) 16 4.68 mm² 2.6 x 1.8 X2QFN (DTU) 16 2.56 mm² 1.6 x 1.6
  • Operating power-supply voltage range of 1.08 V to 3.6 V
  • Allows bidirectional voltage-level translation and GPIO expansion between 1.2-V, 1.8-V, 2.5-V, and 3.3-V I 2C bus and p-ports
  • Low standby current consumption of 1 µA typical at 1.8 V
  • 1-MHz fast mode plus I 2C bus
  • Hardware address pin allows two devices on the same I 2C, SMBus bus
  • Active-low reset input ( RESET )
  • Open-drain active-low interrupt output ( INT )
  • Input or output configuration register
  • Polarity inversion register
  • Configurable I/O drive strength register
  • Pull-up and pull-down resistor configuration register
  • Internal power-on reset
  • Noise filter on SCL or SDA inputs
  • Latched outputs with high-current drive maximum capability for directly driving LEDs
  • Latch-up performance exceeds 100 mA per JESD 78, class II
  • ESD protection exceeds JESD 22
    • 4000-V Human-body model (A114-A)
    • 1000-V Charged-device model (C101)
  • Operating power-supply voltage range of 1.08 V to 3.6 V
  • Allows bidirectional voltage-level translation and GPIO expansion between 1.2-V, 1.8-V, 2.5-V, and 3.3-V I 2C bus and p-ports
  • Low standby current consumption of 1 µA typical at 1.8 V
  • 1-MHz fast mode plus I 2C bus
  • Hardware address pin allows two devices on the same I 2C, SMBus bus
  • Active-low reset input ( RESET )
  • Open-drain active-low interrupt output ( INT )
  • Input or output configuration register
  • Polarity inversion register
  • Configurable I/O drive strength register
  • Pull-up and pull-down resistor configuration register
  • Internal power-on reset
  • Noise filter on SCL or SDA inputs
  • Latched outputs with high-current drive maximum capability for directly driving LEDs
  • Latch-up performance exceeds 100 mA per JESD 78, class II
  • ESD protection exceeds JESD 22
    • 4000-V Human-body model (A114-A)
    • 1000-V Charged-device model (C101)

The TCAL6408 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I 2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.08 V to 3.6 V on the I 2C bus side (V CCI) and a power supply voltage ranging from 1.08 V to 3.6 V on the P-port side (V CCP).

The device supports 100-kHz (Standard-mode), 400-kHz (Fast-mode), and 1-MHz (fast-mode-plus) I 2C clock frequencies. I/O expanders such as the TCAL6408 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on.

The TCAL6408 has Agile I/O ports which include additional features designed to enhance the I/O performance in terms of speed, power consumption and EMI. The additional features are: programmable output drive strength, programmable pull-up and pull-down resistors, latchable inputs, maskable interrupt, interrupt status register, and programmable open-drain or push-pull outputs.

The TCAL6408 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I 2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.08 V to 3.6 V on the I 2C bus side (V CCI) and a power supply voltage ranging from 1.08 V to 3.6 V on the P-port side (V CCP).

The device supports 100-kHz (Standard-mode), 400-kHz (Fast-mode), and 1-MHz (fast-mode-plus) I 2C clock frequencies. I/O expanders such as the TCAL6408 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on.

The TCAL6408 has Agile I/O ports which include additional features designed to enhance the I/O performance in terms of speed, power consumption and EMI. The additional features are: programmable output drive strength, programmable pull-up and pull-down resistors, latchable inputs, maskable interrupt, interrupt status register, and programmable open-drain or push-pull outputs.

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Technical documentation

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* Data sheet TCAL64088-Bit Translating I2C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers datasheet (Rev. B) PDF | HTML 07 Nov 2023
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 03 Jul 2024
Application note Features of TCAL Agile I/O Expanders PDF | HTML 06 Jun 2023

Design & development

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Evaluation board

IO-EXPANDER-EVM — IO-EXPANDER-EVM: I2C and SMBus IO Expander Evaluation Module

The IO expander evaluation module (EVM) lets you evaluate TI's portfolio of SMBus and I2C IO expander line devices. The TCA6424A and TCA9539 come installed on the board. The 24-pin TSSOP footprint also supports TCA6408A, TCA6416A, TCA9534, TCA9534ATCA9535, TCA9538, TCA9554, TCA9554A and TCA9555.

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TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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Package Pins CAD symbols, footprints & 3D models
TSSOP (PW) 16 Ultra Librarian
UQFN (RSV) 16 Ultra Librarian
X2QFN (DTU) 16 Ultra Librarian

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