M41T256YMH7 Datasheet PDF - ST Microelectronics
| Part Number | M41T256YMH7 | |
| Description | 256 Kbit 32K x8 SERIAL RTC | |
| Manufacturers | ST Microelectronics | |
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M41T256Y
256 Kbit (32K x8) Serial RTC
FEATURES SUMMARY
■ 5V OPERATING VOLTAGE
■ SERIAL INTERFACE SUPPORTS
EXTENDED I2C BUS ADDRESSING
(400kHz)
■ AUTOMATIC SWITCH-OVER AND
DESELECT CIRCUITRY
■ POWER-FAIL DESELECT VOLTAGES:
– M41T256Y: VCC = 4.5 to 5.5V;
VPFD = 4.2 < VPFD < 4.5V
■ COUNTERS FOR TENTHS/HUNDREDTHS
OF SECONDS, SECONDS, MINUTES,
HOURS, DAY, DATE, MONTH, and YEAR
■ PROGRAMMABLE SOFTWARE CLOCK
CALIBRATION
■ 32,752 BYTES OF GENERAL PURPOSE
RAM
■ MICROPROCESSOR POWER-ON RESET
■ HOLDS MICROPROCESSOR IN RESET
UNTIL SUPPLY VOLTAGE REACHES
STABLE OPERATING LEVEL
■ AUTOMATIC ADDRESS-INCREMENTING
■ TAMPER INDICATION CIRCUIT WITH TIME-
STAMP
■ SLEEP MODE FUNCTION
■ PACKAGING INCLUDES A 44-LEAD SOIC
AND SNAPHAT® TOP (to be ordered
separately)
■ SOIC PACKAGE PROVIDES DIRECT
CONNECTION FOR A SNAPHAT® TOP
WHICH CONTAINS THE BATTERY AND
CRYSTAL
Figure 1. 44-pin, Hatless SOIC Package
44
1
SO44 (MT)
Figure 2. 44-pin SOIC Package
SNAPHAT (SH)
Crystal/Battery
44
1
SOH44 (MH)
June 2004
1/27
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Figure 4. 44-pin SOIC Connections (MT)
XO
XI
NF
RST
NF
NF
NF
NF
NF
NF
NF
TP
NC
NF
NF
NF
NF
SDA
VSS
VSS
NC
VSS
1 44
2 43
3 42
4 41
5 40
6 39
7 38
8 37
9 36
10 35
11 M41T256Y 34
12 33
13 32
14 31
15 30
16 29
17 28
18 27
19 26
20 25
21 24
22 23
VCC
NC
NC
NC
FT
NF
NF
NF
NF
NF
NF
NC
NC
NF
SCL
NC
NF
NF
NF
NF
NF
BAT+
AI04755b
Note: No Function (NF) must be tied to VSS.
Figure 6. Block Diagram
SDA
SCL
PULL-UP TO
CHIP VCC
I2C
INTERFACE
Crystal
TP
32KHz
OSCILLATOR
VCC
M41T256Y
Figure 5. 44-pin SOIC (MH - SNAPHAT)
NC
NC
NF
RST
NF
NF
NF
NF
NF
NF
NF
TP
NC
NF
NF
NF
NF
SDA
VSS
VSS
NC
VSS
1 44
2 43
3 42
4 41
5 40
6 39
7 38
8 37
9 36
10 35
11 M41T256Y 34
12 33
13 32
14 31
15 30
16 29
17 28
18 27
19 26
20 25
21 24
22 23
VCC
NC
NC
NC
FT
NF
NF
NF
NF
NF
NF
NC
NC
NF
SCL
NC
NF
NF
NF
NF
NF
NC
AI07022
REAL TIME CLOCK
CALENDAR
32,752 BYTES
USER RAM
RTC
& CALIBRATION
TAMPER BIT
FT(1)
POWER
VBAT
Note: 1. Open drain output
VBL= 2.5V COMPARE
VSO = VBAT COMPARE
VPFD = 4.38V
COMPARE
BL
POR
RST(1)
AI04759
5/27
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for M41T256YMH7 electronic component. |
| Information | Total 27 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ M41T256YMH7.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| M41T256YMH | The function is 256 Kbit 32K x8 SERIAL RTC. ST Microelectronics | |
| M41T256YMH7 | The function is 256 Kbit 32K x8 SERIAL RTC. ST Microelectronics | |
| M41T256YMH7TR | The function is 256 Kbit 32K x8 SERIAL RTC. ST Microelectronics | |
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