M48T201V-70MH1 STMICROELECTRONICS [STMicroelectronics], M48T201V-70MH1 Datasheet - Page 19

• Manufacturer Part Number: M48T201V-70MH1
• Description: 3.3V-5V TIMEKEEPER CONTROLLER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Power-on Reset
The M48T201Y/V continuously monitors V
When V
the RST pulls low (open drain) and remains low on
power-up for t
The RST pin is an open drain output and an appro-
priate pull-up resistor to V
control rise time.
Figure 10. RSTIN1 and RSTIN2 Timing Waveforms
Table 8. Reset AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
t
t
Symbol
R1HRZ
R2HRZ
2. C
t
t
R1
R2
CC
L
(2)
(2)
= 5pF (see
falls to the power fail detect trip point,
RSTIN1
RSTIN2
RST
REC
RSTIN1 Low to RST Low
RSTIN2 Low to RST Low
RSTIN1 High to RST Hi-Z
RSTIN2 High to RST Hi-Z
Figure 14., page
after V
CC
CC
tR1
passes V
should be chosen to
25).
Parameter
PFD
A
= 0 to 70°C; V
(max).
CC
(1)
.
tR1HRZ
CC
Reset Inputs (RSTIN1 & RSTIN2)
The M48T201Y/V provides two independent in-
puts which can generate an output reset. The du-
ration and function of these resets is identical to a
reset generated by a power cycle. Figure
Table
this function. Pulses shorter than t
not generate a reset condition. RSTIN1 and
RSTIN2 are each internally pulled up to V
through a 100K
= 4.5 to 5.5V or 3.0 to 3.6V (except where noted).
Hi-Z
tR2
8
illustrate the AC reset characteristics of
resistor.
Min
50
20
40
40
M48T201Y, M48T201V
tR2HRZ
Hi-Z
AI01679
Max
200
100
200
200
R1
and t
Unit
10
ms
ms
ms
ns
R2
19/33
and
will
CC