PCF8574TS/3,118

Product Overview

PCF8574TS/3,118 is an I/O expander from NXP USA Inc. that provides eight I/O channels through an I2C interface. The device operates with a clock frequency of 100 kHz and supports a supply voltage range of 2.5V to 6V. It is specified for an operating temperature range of -40°C to 85°C and is supplied in a surface-mount 20-LSSOP package, identified by the supplier device package 20-SSOP. The part includes an interrupt output and a POR feature. Its outputs are push-pull, with output source/sink current values of 300 µA and 25 mA.

Key Features

• Eight I/O channels in a single I/O expander
• I2C interface with 100 kHz clock frequency
• 2.5V to 6V supply voltage range
• Push-pull outputs with 300 µA source and 25 mA sink current
• Interrupt output
• POR feature
• Surface-mount 20-LSSOP package with 0.173" (4.40 mm) width
• -40°C to 85°C operating temperature

Applications

• Expanding I/O capacity in embedded controllers that use an I2C host interface
• Acquiring switch, sense, or status signals in board-level digital systems
• Driving push-pull digital control lines within the stated output source and sink current limits

Design & Procurement Notes

When evaluating PCF8574TS/3,118, confirm that the Obsolete product status aligns with the intended production or maintenance lifecycle. The part is a surface-mount device in a 20-LSSOP package with 0.173" (4.40 mm) width, so footprint and assembly process should match the board design. The host interface should be compatible with I2C operation and the specified 100 kHz clock frequency, while the system supply must remain within 2.5V to 6V. The interrupt output and POR feature should be reviewed against system requirements, and the -40°C to 85°C operating temperature range should be checked against environmental constraints.