MC34978AES中文资料Switch Detection Interface, 22-switches, 3.3 V / 5.0 V SPI , QFN32数据手册恩XP规格书

描述 Description

The NXP® MC34978 is a multiple switch detection interface (MSDI) designed to detect the closing and opening of up to 22 switch contacts in industrial environments.
The switch status, either open or closed, is transferred to the microprocessor unit through a serial peripheral interface (SPI)
This SMARTMOS® device also features a 24-to-1 analog multiplexer for reading analog inputs
Individually selectable input currents are available in Normal and Low-Power Mode (LPM), as needed in the application
A battery and temperature monitor are included in the IC and are available via the AMUX pin
This product interfaces with any microcontroller that supports SPI communications

特性 Features

• Designed to operate 4.5 V ≤ VBATP ≤ 36 V
• Switch input voltage range -14 V to VPWR, 36 V Max.
• Interfaces directly to an MCU using 3.3 V / 5.0 V SPI protocol
• Selectable wake-up on change of state

• Selectable wetting current (2, 6, 8, 10, 12, 14, 16, or 20 mA)
• 8 programmable inputs (switches to battery or ground) and 14 switch-to-ground inputs
• Typical standby current - VBATP = 30 uA and VDD = 10 uA
• Integrated battery and temperature sensing