SH3100 Datasheet, PDF (1/80 Pages) Semtech Corporation – Supervisory IC with I2C Interface and PWM

POWER MANAGEMENT
SH3100
Supervisory IC with I²C
Interface and PWM
Description
The SH3100 is a size, power, and cost-saving solution for microprocessor support functions. It is intended to replace
a number of peripheral devices normally used in conjunction with a microprocessor. Its prime function is to provide
an accurate and stable clock source which can be started up and shut down very quickly to enable it to be used in a
pulsed fashion for very low power applications.
The SH3100 consumes very little power when in standby, and it provides a stable output clock in less than 2μs. This
allows it to outperform ceramic resonators and crystals requiring much longer start-up times.
Features
Master HFDCO oscillator which can be programmed to
between 8MHz and 33.5MHz with 2kHz resolution
Periodic interrupt timer (PIT) with a 30μs resolution
up to 36 hours
A 32.768kHz crystal oscillator with 5-bit programma-
ble padding capacitance giving a frequency adjust-
ment resolution of 4ppm
Two clock outputs, each of which can be powered inde
pendently from VDD or VBAK and can operate either
in-phase or in complementary mode
Real time clock with 1/256 second resolution up to
Year 2099
Spread spectrum option on the output clock
Battery backup facility, which maintains register con-
tents less than 2μA consumption
An internal oscillator which is fuse-calibrated to
provide a 32.768kHz clock source, accuracy is better
than ±3% over temperature and supply voltage
96-bit electrically programmable non-volatile fuse
memory array
7-bit programmable threshold reset comparator (VBO)
between 1.7V and 4V with 24mV resolution
1.7V to 5.5V operating range on the main VDD supply
0.9V to 5.5V operating range on the battery backup
supply (VBAK)
Edge-triggered, level-sensitive, and toggling interrupt
output (INT)
General-purpose I/O option on the interrupt pin (INT)
Programmable reset duration between 6ms and 5.3
seconds
Low power, low dropout voltage regulator (LDO) output
on PWM pin
Less than 10μA standby current and less than 12mA
maximum operating current (excluding LDO load)
Switched mode boost, bootstrap boost, and buck
regulation control
I²C interface with 3-bit fuse-settable address complies
with I²C fast mode specification
56 bytes of control registers including a 9-byte
scratchpad
General-purpose 8-bit DAC and Comparator
Small 3mm x 3mm 16-lead MLP package
General-purpose PWM & PDM output
Programmable watchdog counter with a 7.8ms
resolution up to 8 seconds delay
Covered by United States Patent 6,903,986
Semtech, the Semtech logo, MicroBuddy, μBuddy, and μB are marks
of Semtech Corporation. All other marks belong to their respective
owners.
May 22, 2006
www.semtech.com
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