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EM6151 Datasheet, PDF (4/10 Pages) EM Microelectronic - MARIN SA – Low Power Windowed Watchdog with Reset, Sleep Mode Functions
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EM6151
Timing Characteristics
VDD = 5.0 V, Tj = -40 to +125 °C, unless otherwise specified
Parameter
Symbol Test Conditions
Propagation delay TCL to Output Pins
VIN sensitivity
Watchdog Reset Pulse Period
Version V30
TDIDO
TSEN
TWDRP
VINhigh=1.1xVREF, VINlow=0.9xVREF
TCL inactive
Power-on Reset delay
Closed Window Time
Open Window Time
Watchdog Time
Watchdog Reset Pulse Width if no TCL
Version V50
TPOR
TCW
TOW
TWD
TWDR
ROSC= 116.9 kΩ ±1%
Power-on Reset delay
Closed Window Time
Open Window Time
Watchdog Time
Watchdog Reset Pulse Width if no TCL
Version V53
TPOR
TCW
TOW
TWD
TWDR
ROSC= 121.6 kΩ ±1%
Power-on Reset delay
Closed Window Time
Open Window Time
Watchdog Time
Watchdog Reset Pulse Width if no TCL
Version V55
TPOR
TCW
TOW
TWD
TWDR
ROSC = 23.2 kΩ ±1%
Power-on Reset delay
Closed Window Time
Open Window Time
Watchdog Time
Watchdog Reset Pulse Width if no TCL
Watchdog Reset Pulse Width in Sleep Mode
Watchdog Reset Pulse Period in Sleep Mode
TPOR
TCW
TOW
TWD
TWDR
TWDRS
TWDRPS
ROSC = 107.5 kΩ ±1%
ROSC off; RINT=1MΩ
TCL inactive
For different values of TWD and ROSC, see figures 9 to 12.
Min. Typ. Max.
250 500
1
5
20
TCW + TOW+ TWDR
Units
ns
μs
ms
91.6 100 108.3
74
80 85.76
37
40 42.88 ms
92.5 100 107.2
2.25 2.5 2.75
91.6 100 108.3
74
80 85.76
37
40 42.88 ms
92.5 100 107.2
2.25 2.5 2.75
4.57 5.0 5.44
9.24 10 10.77
18.48 20 21.54 ms
18.48 20 21.54
0.56 0.625 0.69
91.6 100 108.3
74
80 85.76
37
40 42.88
92.5 100 107.2 ms
2.25 2.5 2.75
2.8
3.2
3.6
750 1100 1450
Table 4
Timing Waveforms
Watchdog Timeout Period
Version V50:
TWD
For ROSC=121.6 kOhm
Version V53:
TWD
For ROSC=23.2 kOhm
TCW (closed window)
TOW (open)
Watchdog
timer reset
80
120
Time [ms]
( V30, V50 and V55 have similar ratios for TCW and TOW )
TCW (closed)
10
Watchdog
timer reset
TOW (open)
30
Time [ms]
Fig. 4
Copyright © 2005, EM Microelectronic-Marin SA
4
rev. B / 06.06
www.emmicroelectronic.com
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