SH3000: MicroBuddy® Low-Power Programmable Multifunction Support IC for Microcontrollers

Highly integrated IC
- 3 mm x 3 mm x 0.9 mm 16-lead MLP (QFN) package
CPU Supervisor
- Low-V_DD reset programmable from 2.3 V to 4.3 V
- Watchdog timer with programmable timeout periods
- Both active-high and active-low reset outputs
Clock Management System
- Replaces high-frequency (HF) crystal or resonator
- Programmable clock output from 32.768 kHz to 16 MHz
- Speed shift between multiple clock frequencies
- Adjustable spectrum spreading for EMI reduction
- Directly supports microcontroller STOP function
- Deep sleep with instantaneous auto-wakeup
Real-Time Support
- 179-year real-time clock, battery-backup capable
- Dedicated 32.768 kHz buffered clock output
- Built-in trim for 32.768 kHz oscillator to ± 4 ppm
- Programmable periodic interrupt / wakeup timer
Auxiliary functions
- 4-byte (32-bit) scratchpad RAM, loaded on reset with factory-set value (zero or optional ID code)
- All settings programmable in real time, defaults restored from nonvolatile memory on reset
Operates from 2.3 V to 5.5 V
I_DD < 850 µA / 2 MHz, < 3 mA / 16 MHz, < 10 µA/standby
I_BUP < 2 µA / I_BSB < 50 nA (battery backup / standby)