Silicon Labs CP2403-GM

Description
The CP2400/1/2/3 is a 128/64 segment LCD driver with GPIO expander, real-time clock, and 256 bytes of RAM. It supports static, 2-mux, 3-mux, and 4-mux displays and features an on-chip bias generation with internal charge pump. The GPIO expander expands the GPIO count by up to 36 pins (48-pin packages) or 20 pins (32-pin package). The real-time clock provides precision time keeping with a 32.768 kHz watch crystal and a 36-hour programmable counter with wake-up alarm. The device operates from 1.8-3.6 V and has an ultra-low power mode with LCD (<3 μA typical).

Features
LCD Driver
Controls up to 128 segments (48-pin packages) or 64 segments (32-pin package)
Supports static, 2-mux, 3-mux, and 4-mux displays
On-chip bias generation with internal charge pump
Low power blink capability
GPIO Expander
Expands GPIO count by up to 36 pins (48-pin packages) or 20 pins (32-pin package)
GPIO pins may be configured to push-pull or open-drain outputs with two drive levels
GPIO may also be used as digital inputs (CP2400/1/2/3 pullups included)
Port Match Capability can wake up host controller using interrupt pin
5 V Tolerant I/O
Real Time Clock, SmaRTClock
Precision time keeping with 32.768 kHz watch crystal; self-oscillate mode requires no external crystal; accepts external 32 kHz CMOS clock
36-hour programmable counter with wake up alarm
Can wake up the host controller using interrupt pin
Low power (<1.5 μA)
256 Bytes RAM
General purpose RAM expands the memory available to host controller.
16-bit Timers
Two general purpose 16-bit timers
Clock Sources
20 MHz Internal oscillator
Can be clocked from an external CMOS clock
Digital Bus Interface
4-wire SPI Interface operates up to 2.5 Mbps with synchronous external clock or up to 1 Mbps with internal clock (CP2400/2 only).
2-wire SMBus/I²C Interface operates up to 400 kHz with internal clock (CP2401/3 only).
Dedicated RST and INT pins.
Optional CLK pin can be used as a CMOS clock input.
Optional PWR pin (SMBus/I²C devices only) places the device in a low power mode. SPI devices use the NSS pin to place the device in a low power mode.
Low Power
1.8-3.6 V operation with integrated LDO
Ultra Low Power Mode w/ LCD (<3 μA typical)
Shutdown current (0.05 μA typical)

Applications
Handheld Equipment
Utility Meters
Thermostat Display
Home Security Systems