Information

Microchip Technology Inc.• The Embedded Control Solutions Company®
MCP23016, Serial Peripherals - 16-bit I/O Expander
The Microchip MCP23016 is a 16-bit input/output
expander designed to provide embedded systems with
general purpose remote I/O expansion through an
I
2
C™ serial port. The fully bi-directional 16 I/Os default
to inputs and can be confi gured as inputs or outputs.
Additionally, there are four sets of registers that are
programmable and provide for confi guration (input or
output control), output value, and polarity (active low
or high). The MCP23016 open drain interrupt (INT)
output is activated when any input state differs from
its corresponding input port register state. By sending
an interrupt signal on the interrupt logic of the master,
this remote slave device informs the master that
there is incoming data on the port without having to
communicate via the I
2
C bus. Three external hardware
pins (A0, A1 and A2) vary the fixed I
2
C address and
allow up to eight devices to share the same bus.
The MCP23016 has low current consumption and
includes latched outputs with high current drive
capability for directly driving LEDs.
Applications:
• General purpose I/O expansion for systems utilizing
I
2
C and SMBus™ ports, such as, driving ACPI power
switches, sensors, push-buttons, keypads, LEDs
and fans
• Servers, workstations, backplanes and PC
applications supporting microprocessors for
examining input lines from peripherals, such as,
keyboards and temperature sensors
• Power supply applications (driving LEDs and sensor
type applications)
• PCs, cell phones, washers, dryers and industrial
applications
• Board version tracking and configuration
• Board monitoring and status reporting
(AC/DC good or bad conditions)
• Multiple card systems in telecom, networking and
base station infrastructure equipment
• Field recall and troubleshooting functions for
installed boards
Features:
• I
2
C and SMBus compatible clock frequency
(0 to 400 kbits/s)
• 2.0 – 5.5V operating supply voltage range
• 16 programmable bi-directional I/Os compatible with
most processors
• Outputs can directly drive LEDs (source and sink
current 25 mA)
• Polarity inversion register to configure the polarity of
the input port data
• Internal Power-on Reset (POR)
• Open-drain interrupt output activated when input
changes state
• Three external address pins allow user to connect
up to eight of these devices on the same bus
• Low supply current
• Specified over industrial temperature range
(-40°C to +85°C)
• Available in 28-pin PDI P , SSO P , SOIC and QFN
packages
MCP23016
LEDs,
Displays,
etc.
Keypad
Relays
I
2
C™
Bus
I
2
C
Port
Master
MCU
MCP23016
Interface Devices