Texas Instruments

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 1.65-V to 5.5-V VCCoperation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface. The TCA9555 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low operation) registers. At power on, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. The TCA9555 is identical to theTCA9535, except for the inclusion of the internal I/O pull-up resistor, which pulls the I/O to a default high when configured as an input and undriven. Three hardware pins (A0, A1, and A2) are used to program the I2C address, which allows up to eight TCA9555 devices to share the same I2C bus or SMBus. The fixed I2C address of the TCA9555 is the same as thePCF8575,PCF8575C, andPCF8574, allowing up to eight of these devices in any combination to share the same I2C bus or SMBus. This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 1.65-V to 5.5-V VCCoperation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface. The TCA9555 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low operation) registers. At power on, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. The TCA9555 is identical to theTCA9535, except for the inclusion of the internal I/O pull-up resistor, which pulls the I/O to a default high when configured as an input and undriven. Three hardware pins (A0, A1, and A2) are used to program the I2C address, which allows up to eight TCA9555 devices to share the same I2C bus or SMBus. The fixed I2C address of the TCA9555 is the same as thePCF8575,PCF8575C, andPCF8574, allowing up to eight of these devices in any combination to share the same I2C bus or SMBus.

The TCA9617A is a BiCMOS dual bidirectional buffer intended for I2C bus and SMBus systems. The device provides bidirectional voltage-level translation (up-translation and down-translation) between low voltages (down to 0.8V) and higher voltages (2.2V to 5.5V) in mixed-mode applications. This device enables I2C and similar bus systems to be extended, without degradation of performance even during level shifting. The TCA9617A buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, allowing two buses of 550pF to be connected in an I2C application. This device can also be used to separate two halves of a bus for voltage and capacitance. The TCA9617A is a BiCMOS dual bidirectional buffer intended for I2C bus and SMBus systems. The device provides bidirectional voltage-level translation (up-translation and down-translation) between low voltages (down to 0.8V) and higher voltages (2.2V to 5.5V) in mixed-mode applications. This device enables I2C and similar bus systems to be extended, without degradation of performance even during level shifting. The TCA9617A buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, allowing two buses of 550pF to be connected in an I2C application. This device can also be used to separate two halves of a bus for voltage and capacitance.

The TCA9800 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9800 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9800 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9800 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9800 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9800 is used. The TCA9800 is part of a four device family with varying current source strengths (see theDevice Comparison Table). The TCA9800 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9800 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9800 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9800 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9800 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9800 is used. The TCA9800 is part of a four device family with varying current source strengths (see theDevice Comparison Table).

The TCA9801 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9801 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9801 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9801 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9801 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9801 is used. The TCA9801 is part of a four device family with varying current source strengths (see theDevice Comparison Table). The TCA9801 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9801 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9801 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9801 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9801 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9801 is used. The TCA9801 is part of a four device family with varying current source strengths (see theDevice Comparison Table).

The TCA9802 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9802 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9802 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9802 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9802 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9802 is used. The TCA9802 is part of a four device family with varying current source strengths (see theDevice Comparison Table). The TCA9802 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9802 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9802 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9802 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9802 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9802 is used. The TCA9802 is part of a four device family with varying current source strengths (see theDevice Comparison Table).

The TCA9803 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9803 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9803 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9803 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9803 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9803 is used. The TCA9803 is part of a four device family with varying current source strengths (see theDevice Comparison Table). The TCA9803 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9803 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9803 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9803 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9803 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9803 is used. The TCA9803 is part of a four device family with varying current source strengths (see theDevice Comparison Table).

The TCAL6408 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.08V to 3.6V on the I2C bus side (VCCI) and a power supply voltage ranging from 1.08V to 3.6V on the P-port side (VCCP). The device supports 100kHz (Standard-mode), 400kHz (Fast-mode), and 1MHz (fast-mode-plus) I2C 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 I2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.08V to 3.6V on the I2C bus side (VCCI) and a power supply voltage ranging from 1.08V to 3.6V on the P-port side (VCCP). The device supports 100kHz (Standard-mode), 400kHz (Fast-mode), and 1MHz (fast-mode-plus) I2C 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 TCAL6416 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.08V to 3.6V on the I2C bus side (VCCI) and a power supply voltage ranging from 1.08V to 3.6V on the P-port side (VCCP). The device supports 100kHz (Standard-mode), 400kHz (Fast-mode), and 1MHz (fast-mode-plus) I2C clock frequencies. I/O expanders such as the TCAL6416 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, etc. The TCAL6416 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 TCAL6416 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.08V to 3.6V on the I2C bus side (VCCI) and a power supply voltage ranging from 1.08V to 3.6V on the P-port side (VCCP). The device supports 100kHz (Standard-mode), 400kHz (Fast-mode), and 1MHz (fast-mode-plus) I2C clock frequencies. I/O expanders such as the TCAL6416 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, etc. The TCAL6416 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 TCAL6416R provides general purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. The device operates with a power supply voltage ranging from 1.08V to 3.6V on the I2C bus side (VCCI), and a power supply voltage ranging from 1.08V to 3.6V on the P-port side (VCCP). The device supports 100kHz (standard-mode), 400kHz (fast-mode), and 1MHz (fast-mode-plus) I2C clock frequencies. I/O expanders, such as the TCAL6416R, provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on. The TCAL6416R 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 RESET pin only resets the I2C state machine when stuck to regain access to the I2C. I/O pins and sticky registers retain the last configured state while the I2C is being re-initialized. The TCAL6416R provides general purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. The device operates with a power supply voltage ranging from 1.08V to 3.6V on the I2C bus side (VCCI), and a power supply voltage ranging from 1.08V to 3.6V on the P-port side (VCCP). The device supports 100kHz (standard-mode), 400kHz (fast-mode), and 1MHz (fast-mode-plus) I2C clock frequencies. I/O expanders, such as the TCAL6416R, provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on. The TCAL6416R 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 RESET pin only resets the I2C state machine when stuck to regain access to the I2C. I/O pins and sticky registers retain the last configured state while the I2C is being re-initialized.

The TCAL9539-Q1 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I 2C bus (or SMBus) protocol and is designed for 1.08-V to 3.6-V V CC operation. 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 TCAL9539-Q1 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on. The TCAL9539-Q1 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 TCAL9539-Q1 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I 2C bus (or SMBus) protocol and is designed for 1.08-V to 3.6-V V CC operation. 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 TCAL9539-Q1 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on. The TCAL9539-Q1 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.