SH3000 Datasheet, PDF (17/24 Pages) Semtech Corporation – Low-Power Programmable Multifunction Support IC for Microcontrollers

SH3000 MicroBuddy™
SYSTEM MANAGEMENT
Operating characteristics of programmable reset
Parameter
VDD switching threshold (Start-up default = 2.3 V)
VDD threshold resolution
VDD hysteresis
Falling VDD threshold switch delay
Threshold digital-analog converter (DAC) settling time
Minimum VDD for valid nRST and RST
Symbol Min
Typ
Vbo
2.27
2.3
Vres
25
33
Vhys
25
Td
1
Tdac
VDDmin
Max
Units
4.4
V
41
mV
100
mV
5
us
5
ms
1
V
Operating characteristics of the high-frequency oscillator (HFO)
Parameter
Minimum operating frequency (Start-up default = 2 MHz)
Maximum operating frequency
Frequency resolution
Programmed frequency accuracy at 25°C
Frequency drift over temperature and supply
CLKOUT cycle to cycle jitter (spread spectrum off)
Startup time from standby
Settling time to 0.1% after HF digitally-controlled oscillator
(DCO) code change
CLKOUT duty cycle
Frequency temperature stability
Short term frequency stability
Minimum spread spectrum range
Maximum spread spectrum range
CLKOUT rise/fall time (20 pF load)
CLKOUT logic output low (4 mA load)
CLKOUT logic output high (4 mA load)
Symbol Min
Fmin
Fmax
16.8
Fres
Fst
-0.2
Fdrift
-0.5
J
Tstart
Tsett
DC
40
Fts
Fs
SSmin 26
SSmax 204
Trf
Vol
Voh
-0.4
Typ
Max
5.6
8
21
2
+0.2
+0.5
0.2
2
10
60
100
0.1
32
38
256
306
5
0.25
0.4
-0.25
Units
MHz
MHz
kHz
%
%
%
µs
µs
%
ppm/°C
%/sec
kHz
kHz
ns
V
Ref VDD
Copyright ©2003-2005 Semtech Corporation
17
V1.15 www.semtech.com