I/O expanders simplify microcontroller-based system upgrades and reduce design cycle time - Embedded.com

I/O expanders simplify microcontroller-based system upgrades and reduce design cycle time

Microchip Technology Inc. is announcing two input/output (I/O) expanders for 8-bit ports. The MCP23008 supports standard (100 kHz), fast (400 kHz) and high-speed (up to 1.7 MHz) I2 C communications. The MCP23S08 I/O expander supports SPI clock speeds up to 10 MHz.

These devices are intended to ease development and cut costs for designers to upgrading their current microcontroller-based systems with additional I/O capability. The MCP23008 and MCP23S08 provide system I/O expansion via existing microcontroller serial ports, saving development time and cost by eliminating the need to redesign the complete system with a higher I/O microcontroller. The devices can support a broad range of applications with low- and high-bandwidth requirements.

Hardware-address pins allow multiple devices to be cascaded in one system adding up to 64 bits of I/O to existing systems.

Samples and volume production are available today. Packaging includes lead (Pb)-free 18-pin PDIPs, 18-pin SOICs and 20-pin SSOPs. The MCP23008 is priced at $0.75 each in 1,000-unit quantities for the 18-pin PDIP. The MCP23S08 is priced at $0.80 each in 1,000-unit quantities for the 18-pin PDIP.

See Microchip's website for complete details.

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