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Número de pieza | M41T315W-65MQ6E | |
Descripción | Serial Access Phantom RTC Supervisor | |
Fabricantes | ST Microelectronics | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de M41T315W-65MQ6E (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
No Preview Available ! M41T315Y*
M41T315V/W
Serial Access Phantom RTC Supervisor
FEATURES SUMMARY
■ 3.0V, 3.3V, OR 5V OPERATING VOLTAGE
■ REAL TIME CLOCK KEEPS TRACK OF
TENTHS/HUNDREDTHS OF SECONDS,
SECONDS, MINUTES, HOURS, DAYS,
DATE OF THE MONTH, MONTHS, AND
YEARS
■ AUTOMATIC LEAP YEAR CORRECTION
VALID UP TO 2100
■ AUTOMATIC SWITCH-OVER AND
DESELECT CIRCUITRY
■ CHOICE OF POWER-FAIL DESELECT
VOLTAGES:
(VPFD = Power-fail Deselect Voltage)
– M41T315Y: VCC = 4.5 to 5.5V
4.25V ≤ VPFD ≤ 4.50V
– M41T315V: VCC = 3.0 to 3.6V
2.80V ≤ VPFD ≤ 2.97V
– M41T315W: VCC = 2.7 to 3.3V
2.60V ≤ VPFD ≤ 2.70V
■ NO ADDRESS SPACE REQUIRED TO
COMMUNICATE WITH RTC
■ PROVIDES NONVOLATILE SUPERVISOR
FUNCTIONS FOR BATTERY BACKUP OF
SRAM
■ FULL ±10% VCC OPERATING RANGE
■ INDUSTRIAL OPERATING TEMPERATURE
RANGE (–40 to +85°C)
■ ULTRA-LOW BATTERY SUPPLY CURRENT
OF 500nA (max)
■ OPTIONAL PACKAGING INCLUDES A 28-
LEAD SOIC and SNAPHAT® TOP (to be
ordered separately)
■ SNAPHAT PACKAGE PROVIDES DIRECT
CONNECTION FOR A SNAPHAT TOP,
WHICH CONTAINS THE BATTERY AND
CRYSTAL
Figure 1. 16-pin SOIC Package
16
1
SO16 (MQ)
Figure 2. 28-pin SOIC Package
SNAPHAT (SH)
Battery/Crystal
28
1
SOH28 (MH)
* Contact Local Sales Office
June 2004
1/24
1 page M41T315Y*, M41T315V, M41T315W
Figure 4. 16-pin SOIC Connections
XI
XO
WE
VBAT(1)
VSS
D
Q
VSS
1 16
2 15
3 14
4 M41T315Y 13
5
M41T315V
M41T315W
12
6 11
7 10
89
VCCI
VCCO
DU
RST
OE
CEI
CEO
NC
AI03909
Note: 1. Should be tied to VSS if not used.
Figure 6. Block Diagram
Figure 5. 28-pin SOIC Connections
WE
NC
NC
NC
NC
NC
NC
VSS
NC
NC
D
Q
NC
VSS
1 28
2 27
3 26
4 25
5 24
6 23
M41T315Y
7 M41T315V 22
8 M41T315W 21
9 20
10 19
11 18
12 17
13 16
14 15
AI03910
VCCI
NC
NC
VCCO
DU
NC
RST
NC
OE
NC
NC
CEI
CEO
NC
CEO
CEI
OE
WE
RST
32,768 Hz
CRYSTAL
CONTROL
LOGIC
XO
XI
READ
WRITE
CLOCK/CALENDAR LOGIC
UPDATE
TIMEKEEPER REGISTER
POWER-FAIL
ACCESS
ENABLE
SEQUENCE
DETECTOR
COMPARISON REGISTER
D I/O
Q BUFFERS
VCCI
DATA
POWER-FAIL
DETECT
LOGIC
INTERNAL VCC
VCCO
VBAT
AI03636B
5/24
5 Page Figure 10. Comparison Register Definition
BYTE 0
76
11
5
0
4
0
M41T315Y*, M41T315V, M41T315W
321 0
01 01
Hex
Value
C5
BYTE 1
00
1
110 10
3A
BYTE 2
10
1
000 11
A3
BYTE 3
01
0
111 00
5C
BYTE 4
11
0
001 01
C5
BYTE 5
00
1
110 10
3A
BYTE 6
10
1
000 11
A3
BYTE 7
01
0
111 00
5C
AI04262
Note: Pattern recognition in “hex” is C5, 3A, A3, 5C, C5, 3A, A3, and 5C. The odds of this pattern being accidentally duplicated and sending
aberrant entries to the RTC is less than 1 in 1019. This pattern is sent to the clock LSB to MSB.
11/24
11 Page |
Páginas | Total 24 Páginas | |
PDF Descargar | [ Datasheet M41T315W-65MQ6E.PDF ] |
Número de pieza | Descripción | Fabricantes |
M41T315W-65MQ6E | Serial Access Phantom RTC Supervisor | ST Microelectronics |
M41T315W-65MQ6F | Serial Access Phantom RTC Supervisor | ST Microelectronics |
M41T315W-65MQ6TR | Serial Access Phantom RTC Supervisor | ST Microelectronics |
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