SH3002 Datasheet, PDF (14/22 Pages) Semtech Corporation – Reset Management and Clock Management Support IC for Microcontrollers

SH3002 MicroBuddy™
SYSTEM MANAGEMENT
Operating characteristics of 32.768 kHz RC oscillator
Parameter
External 1 MOhm referenced nominal frequency
Internal 1 MOhm referenced nominal frequency
CLK32 duty cycle
Programmed frequency accuracy at 25°C
Absolute accuracy over temperature and supply
(external 1 MOhm)
Absolute accuracy over temperature and supply
(internal 1 MOhm)
Frequency temperature stability (ext. 1 MOhm)
Frequency temperature stability (int. 1 MOhm)
Power on startup time
CLK32 cycle to cycle jitter
Symbol Min
Fext
Fint
DC
40
Fst
-1.5
Fde
Fdi
Fse
Fsi
Tst
J
Typ
Max
32.768
32.768
60
+1.5
±2
±3
100
200
70
0.1
Units
kHz
kHz
%
%
%
%
ppm/°C
ppm/°C
µs
%
Operating characteristics of programmable reset
Parameter
VDD switching threshold for Min code
(Start-up default = 2.3 V)
VDD switching threshold for Max code
VDD threshold resolution
VDD hysteresis
Falling VDD threshold switch delay
Threshold digital-analog converter (DAC) settling time
Minimum VDD for valid nRST
Symbol Min
Typ
Vbo(min) 2.27
2.3
Vbo(max) 4.2
4.3
Vres
33
Vhys
50
Td
2.5
Tdac
4
VDDmin
Max
Units
2.33
V
4.4
V
mV
mV
µs
ms
1
V
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