M41T94MH6F STMicroelectronics, M41T94MH6F Datasheet - Page 22

• Manufacturer Part Number: M41T94MH6F
• Description: IC RTC SPI SRAM SER 64X8 28-SOIC
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T94MH6F

• Memory Size: 44B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC, 28-SOH (8.48mm Width)
• Bus Type: Serial (SPI)
• User Ram: 64Byte
• Operating Supply Voltage (typ): 3.3/5V
• Package Type: SOH
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 28
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5372-2; M41T94MH6F

Clock operations
4.6
4.7
22/41
Table 6.
Power-on reset
The M41T94 continuously monitors V
the RST pulls low (open drain) and remains low on power-up for t
(max). The RST pin is an open drain output and an appropriate pull-up resistor should be
chosen to control rise time.
Reset inputs (RSTIN1 & RSTIN2)
The M41T94 provides two independent inputs which can generate an output reset. The
duration and function of these resets is identical to a reset generated by a power cycle.
Table 7 on page 23
function. Pulses shorter than t
and RSTIN2 are each internally pulled up to V
RS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Square wave output frequency
and
RS2
Square wave bits
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Figure 13 on page 23
RLRH1
RS1
and t
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CC
. When V
RLRH2
CC
illustrate the AC reset characteristics of this
will not generate a reset condition. RSTIN1
CC
through a 100 k resistor.
RS0
falls to the power fail detect trip point,
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Frequency
REC
32.768
8.192
4.096
2.048
1.024
None
512
256
128
64
32
16
8
4
2
1
after V
Square wave
CC
passes V
Units
kHz
kHz
kHz
kHz
kHz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
M41T94
–
PFD