M62055FP Ver la hoja de datos (PDF) - Renesas Electronics
Número de pieza
componentes Descripción
Lista de partido
M62055FP Datasheet PDF : 10 Pages
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M62055FP
Timing Chart
VO+VCE(sat)
VCC
Tick deactivation
0
VTH1(H)
VO
0
VTH2(H)
TC
VTH2(L)
0
output cutoff
output cutoff
VTH1(L)
↑ ≈0.9V ≈0.9V ↑
RESET
0
tRST(1)
tWD
tRST(2)
WD
0
13
2
46
5
79
10
11
12
13
14
8
1 : When VO rises to 0.5 V, RESET becomes low. Then,
charging to a capacitor C connected to TC will be started
at the VO of 2.82 V (VTH1(H)).
2 : When VCC rises to 3 V + VCE(sat), VO becomes stable.
3 , 4 : When TC voltage rises to 1 V (VTH2(L)), RESET becomes
high. When it rises to 2.4 V (VTH2(H)) further, the capacitor
C is switched to discharge and RESET becomes low.
5 : At the same tome of a change-over to the discharge from
the capacitor C, VO is intercepted.
Then, TC will be discharged completely at VO of 2.72 V
(VTH1(L)).
6 : VO returns to 3 V right after it has fallen down to 0.9 V.
RESET repeats above operation till a normal clock signal
is input to WD pin.
7 , 8 , 9 : In the case of a sudden power interruption, VO falls down
according to a decrease of VCC.
When it falls down to 2.72 V, the capcitor C is discharged
and RESET will be low.
In the case of a reversion from the power interruption, VO
rises according to a increase of VCC. When it rises to 2.82
V, the charging to the capacitor C is started and RESET
will be high right after TC voltage reaches 1 V.
10 , 11 : In the case of a clock signal for discharging the capacitor
C is applied to pin WD before TC voltage reaches to 2.4 V,
a reset signal to RESET is canceled.
12 , 13 : In the case of an abnormal clock signal is input, TC
repeats charging / discharging alternately between 1 V
and 2.4 V, so that RESET also repeats high / low till a
normal clock signal is input.
14 : When VO falls down to 2.72 V, RESET becomes low.
Description of Terms
tRST(1) : Time from when TC begins to charge until it reaches to VTH2(L).
tWD : Time from when TC is VTH2(L) until it reaches to VTH2(H).
tRST(2) : Time from when TC is VTH2(H) until TC starts charging.
Rev.2.00 Mar 10, 2006 page 4 of 9
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