M41ST95WMH6TR STMICROELECTRONICS [STMicroelectronics], M41ST95WMH6TR Datasheet - Page 21

• Manufacturer Part Number: M41ST95WMH6TR
• Description: 5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Power-on Reset
The M41ST95Y/W 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 should be chosen to control
rise time.
Figure 16. RSTIN1 and RSTIN2 Timing Waveforms
Note: 1. Open Drain Output
Table 7. Reset AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
2. Pulse width less than 50ns will result in no RESET (for noise immunity).
3. Pulse width less than 20ms will result in no RESET (for noise immunity).
4. Programmable (see
5. After crystal oscillator has started
t
R2HRH
t
t
t
Symbol
R1HRH
RLRH1
RLRH2
CC
RSTIN1
RSTIN2
RST
(4,5)
falls to the power fail detect trip point,
(2)
(3)
(4)
(1)
REC
after V
RSTIN1 Low to RSTIN1 High
RSTIN2 Low to RSTIN2 High
RSTIN1 High to RST High
RSTIN2 High to RST High
Table 8., page
CC
passes V
Parameter
23)
tRLRH1
PFD
tR1HRH
A
= –40 to 85°C; V
(1)
(max).
CC
.
tRLRH2
CC
Reset Input (RSTIN1 and RSTIN2)
The M41ST95Y/W 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. Table
ure
function. Pulses shorter than t
will not generate a reset condition. RSTIN1 and
RSTIN2 are each internally pulled up to V
through a 100k
= 4.5 to 5.5V or 2.7 to 3.6V (except where noted).
16
illustrate the AC reset characteristics of this
Min
200
100
96
96
tR2HRH
resistor.
M41ST95Y*, M41ST95W
Max
98
98
RLRH1
AI03665
and t
7
Unit
and Fig-
ms
ms
ms
ns
RLRH2
21/35
CC