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