M41T00SC64MY6E [STMICROELECTRONICS]
Real-Time Clock + 64Kbit (8192 x 8) EEPROM; 实时时钟+为64Kbit （ 8192 ×8 ） EEPROM
| 型号： | M41T00SC64MY6E |
| 厂家： | 
ST |
| 描述： | Real-Time Clock + 64Kbit (8192 x 8) EEPROM |
| 文件： | 总19页 (文件大小：157K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M41T00SC64
Real-Time Clock + 64Kbit (8192 x 8) EEPROM
Features
■ 2.7V to 5.5V supply voltage
2
■ I C bus compatible
Embedded crystal
■ Operating temperature of –40 to 85°C
■ Packaging includes:
– 18-lead SOIC (with embedded crystal)
18
■ RoHS compliant
1
Serial RTC features (M41T00S)
■ Counters for seconds, minutes, hours, day,
date, month, years, and century
SOX18(MY)
■ Embedded crystal package
■ Software clock calibration
■ Factory calibrated to 5ppm
18-pin (300mil) SOIC
■ Automatic power-fail detect and switch-over
circuitry
■ Ultra-low battery supply current of 600nA (typ)
■ Automatic leap year compensation
■ Special software programmable output
2
■ Two-wire I C serial interface supports 400kHz
protocol
Serial EEPROM features (M24C64)
■ 8192 bytes of general purpose EEPROM
(more than 1E6 erase/write cycles)
2
■ Two-wire I C serial interface supports 400kHz
protocol
■ Byte and page write (up to 32 bytes)
■ More than 40 year data retention
■ Self-timed programming cycle
January 2007
Rev 3
1/19
www.st.com
1
Contents
M41T00SC64
Contents
1
Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1
2.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
4
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1
4.2
Serial RTC device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
EEPROM device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
6
7
8
9
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2/19
M41T00SC64
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Device select code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operating and AC measurement conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Capacitance and input parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
AC characteristics, (serial RTC, M41T00S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
AC characteristics (serial EEPROM, M24C64). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SOX18 – 18-lead plastic small outline, 300mils, embedded crystal, package mech.. . . . . 16
Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3/19
List of figures
M41T00SC64
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
18-pin SOIC connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
AC Bus timing requirements sequence (serial RTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SOX18 – 18-lead plastic small outline, 300mils, embedded crystal . . . . . . . . . . . . . . . . . . 16
4/19
M41T00SC64
Summary description
1
Summary description
The M41T00SC64 is a low power, Serial Real Time Clock plus a 64Kb EEPROM (see
Figure 3). A built-in 32,768Hz oscillator (crystal controlled) and the first 8 bytes of the RAM
are used for the clock/calendar function and are configured in binary coded decimal (BCD)
format. Addresses and data are transferred serially via a two-line, bi-directional bus. The
built-in address register is incremented automatically after each WRITE or READ data byte.
The M41T00SC64 clock has a built-in power sense circuit which detects power failures and
automatically switches to the battery supply during power failures. The energy needed to
sustain the clock operations can be supplied from a small lithium coin cell.
Typical data retention time for the Serial RTC is in excess of 9.5 years with a 50mAh, 3V
lithium cell. The M41T00SC64 is supplied in an 18-lead Plastic SOIC package.
1.1
Calibration
As the crystal is molded together with the silicon in this package, ST can program the
appropriate calibration value necessary to achieve 5 ppm accuracy at 25°C after two SMT
reflows (see Figure 4). This calibration value will be written into address 1550h of
the EEPROM. This clock accuracy can then be guaranteed to drift no more than 3 ppm the
first year, and 1 ppm for each following year due to crystal aging.
Figure 1.
Logic diagram
V
V
BAT
CC
SCL
M41T00S
+
M24C64
(EEPROM)
E
E
E
SDA
0
1
2
(1)
FT/OUT
WC
V
SS
AI09123
1. Open drain output
5/19
Pin settings
M41T00SC64
2
Pin settings
2.1
Pin description
Table 1. Signal names
FT/OUT (1)
Frequency test / output driver (open drain)
SDA
Serial data address input / output
Serial clock
SCL
WC
Write control
E0, E1, E2
VBAT
Chip enables
Battery supply voltage
VCC
VSS
Supply voltage
Ground
NC (2)
No connect
No function
NF (3)
1. Open drain output
2. No connect (NC) pins should be tied to VSS
.
3. No function (NF) pins should be tied to VSS. Pins 2 and 3, and pins 16 and 17 are internally shorted
together.
2.2
Pin connections
Figure 2.
18-pin SOIC connection
(1)
(1)
1
18
17
16
15
14
13
12
11
10
NC
NF
NF
NC
NC
(2)
(2)
(2)
(2)
(1)
2
3
4
5
6
7
8
9
NF
NF
V
M41T00S
+
M24C64
(EEPROM)
CC
(1)
E0
E1
E2
NC
(3)
FT/OUT
WC
SCL
V
BAT
V
SDA
SS
AI09124
1. No connect (NC) pins should be tied to VSS
.
2. No function (NF) pins should be tied to VSS. Pins 2 and 3, and pins 16 and 17 are internally shorted
together.
3. Open drain output.
6/19
M41T00SC64
Application
3
Application
Figure 3.
Block diagram
1 Hz
SECONDS
OSCILLATOR
32.768 kHz
MINUTES
CENTURY/HOURS
DAY
DIVIDER
FT/OUT
DATE
MONTH
VOLTAGE
SENSE
V
CC
YEAR
CONTROL
LOGIC
and
V
SS
CONTROL
SWITCH
CIRCUITRY
V
BAT
E
0
E
1
E
2
SCL
SDA
SERIAL
BUS
INTERFACE
M24C64
8192 x8
(EEPROM)
ADDRESS
REGISTER
AI09125
Figure 4.
Crystal accuracy across temperature
Frequency (ppm)
20
0
–20
–40
–60
2
ΔF
F
= offset + K x (T – 25)
–80
–100
–120
–140
K = –0.034 ppm/°C2 0.004 ppm/°C2
offset = 6 ppm 6 ppm
–160
–40
–30
–20
–10
0
10
20
30
40
50
60
70
80
Temperature °C
AI09159
7/19
Application
M41T00SC64
Table 2. Device select code
Device type identifier(1)
Chip enable address(2)
RW
b0
b7
1
b6
0
b5
1
b4
0
b3
E2
0
b2
E1
0
b1
E0
0
M24C64
RW
RW
M41T00S
1
1
0
1
1. The most significant bit, b7, is sent first.
2. E0, E1, and E2 are compared against the respective external pins on the memory device.
8/19
M41T00SC64
Operation
4
Operation
4.1
Serial RTC device
The M41T00SC64 contains one Serial RTC (M41T00S). For detailed information on how to
use the devices, see the M41T00S datasheet, which is available from your local
STMicroelectronics distributor or from the STMicroelectronics website,
http://www.st.com/rtc/.
4.2
EEPROM device
The M41T00SC64 contains a 64 Kbit Serial EEPROM (M24C64). For detailed information
on how to use the devices, see the M24C64 datasheet, which is available from your local
STMicroelectronics distributor or from the STMicroelectronics website,
http://www.st.com/eeprom/.
9/19
Maximum rating
M41T00SC64
5
Maximum rating
Stressing the device above the rating listed in the “absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the Operating sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability. Refer also to the STMicroelectronics SURE
program and other relevant quality documents.
Table 3. Absolute maximum ratings
Symbol
Parameter
Value
Unit
TA
Ambient operating temperature
–40 to 85
°C
TSTG
Storage temperature (VCC off, oscillator off)
Lead solder temperature for 10 seconds
–55 to 125
240
°C
°C
(1)
TSLD
VIO
VCC
IO
Input or output voltages
Supply voltage
–0.3 to 6.5
–0.3 to 6.5
20
V
V
Output current
mA
W
PD
Power dissipation
0.25
1. For SOX18 package, Lead-free (Pb-free) lead finish: Reflow at peak temperature of 240°C (total thermal
budget not to exceed 180°C for between 90 to 150 seconds). No direct exposure to infrared (IR) reflow, or
IR preheat allowed, to avoid damaging the embedded 32KHz crystal.
Caution:
Negative undershoots below –0.3V are not allowed on any pin while in the battery back-up
mode.
10/19
M41T00SC64
DC and AC parameters
6
DC and AC parameters
This section summarizes the operating and measurement conditions, as well as the DC and
AC characteristics of the device. The parameters in the following DC and AC characteristic
tables are derived from tests performed under the measurement conditions listed in the
relevant tables. Designers should check that the operating conditions in their projects match
the measurement conditions when using the quoted parameters.
(1)
Table 4. Operating and AC measurement conditions
Parameter
Value
Unit
Supply voltage (VCC
)
2.7 to 5.5
V
Ambient operating temperature (TA)
Load capacitance (CL)
–40 to 85
100
°C
pF
Input rise and fall times
Input pulse voltages
< 5
ns
V
0.2VCC to 0.8VCC
Input and output timing ref. voltages
0.3VCC to 0.7VCC
V
1. Output Hi-Z is defined as the point where data is no longer driven.
Figure 5. AC measurement I/O waveform
0.8V
CC
0.7V
CC
0.3V
CC
0.2V
CC
AI02568
11/19
DC and AC parameters
M41T00SC64
Table 5. Capacitance and input parameters
Parameter (1)(2)
Symbol
Test condition
Min
Max
Unit
pF
CIN
Input capacitance (SCL)
Input capacitance (SDA)
Input Capacitance (Other pins)
WC input impedance
13
18
6
pF
pF
ZWCL
ZWCH
VIN < 0.3V
50
200
kΩ
WC input impedance
VIN < 0.7VCC
500
kΩ
(3)
Output capacitance (SDA)
18
10
pF
pF
COUT
Output capacitance (FT/OUT)
1. Effective capacitance measured with power supply at 5V; sampled, not 100% tested.
2. At 25°C, f = 400kHz..
3. Outputs deselected.
Table 6. DC characteristics
Test Condition(1)
Symbol
ILI
Parameter
Input leakage current
Output leakage current
Min
Typ
Max
3
Unit
µA
0V ≤ VIN ≤ VCC
ILO
0V ≤ VOUT ≤ VCC
3
µA
Supply current
(serial RTC active)
Switch frequency = 400kHz
300
2
µA
ICC1
VCC = 5V, fc=400kHz
(rise/fall time < 30ns)
Supply current
(serial EEPROM active)
mA
ICC2
VIL
SCL, SDA = VCC – 0.3V
Supply current (standby)
Input low voltage
100
µA
V
0.3 VCC
VCC + 0.3
0.4
–0.3
VIH
0.7VCC
Input high voltage
Output low voltage
V
IOL = 2.1mA
IOL = 10mA
V
(2)
VOL
Output voltage (open drain)(2)
Battery supply voltage
0.4
V
(3)
2.5
3
3.5
1
V
VBAT
TA = 25°C, VCC = 0V,
Oscillator ON, VBAT = 3V
IBAT
Battery supply current
0.6
µA
1. Valid for ambient operating temperature: TA = –40 to 85°C; VCC = 2.7 to 5.5V (except where noted).
2. For FT/OUT pin (open drain)
3. STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) as the battery supply.
12/19
M41T00SC64
DC and AC parameters
Figure 6. AC Bus timing requirements sequence (serial RTC)
SDA
SCL
tBUF
tHD:STA
tR
tHD:STA
tF
tHIGH
tSU:DAT
tHD:DAT
tSU:STA
tSU:STO
P
S
tLOW
SR
P
AI00589
Table 7. AC characteristics, (serial RTC, M41T00S)
Parameter (1)
Symbol
Min
0
Max
Unit
fSCL
tLOW
tHIGH
tR
SCL clock frequency
Clock low period
400
kHz
µs
1.3
600
Clock high period
ns
SDA and SCL rise time
SDA and SCL fall time
300
300
ns
tF
ns
START condition hold time
(after this period the first clock pulse is generated)
tHD:STA
600
600
ns
ns
START condition setup time
(only relevant for a repeated start condition)
tSU:STA
tSU:DAT
Data setup time
100
0
ns
µs
ns
(2)
Data hold time
tHD:DAT
tSU:STO
STOP condition setup time
600
Time the bus must be free before a new transmission
can start
tBUF
tLP
1.3
µs
ns
Low-pass filter input time constant (SDA and SCL) for
Serial RTC
50
1. Valid for ambient operating temperature: TA = –40 to 85°C; VCC = 2.7 to 5.5V (except where noted).
2. Transmitter must internally provide a hold time to bridge the undefined region (300ns max.) of the falling
edge of SCL.
13/19
DC and AC parameters
M41T00SC64
Table 8. AC characteristics (serial EEPROM, M24C64)
Test
condition
Symbol
Alt.
Parameter
Clock frequency
Min.
Max.
Unit
fC
fSCL
tHIGH
tLOW
tF
400
kHz
ns
ns
ns
ns
ns
ns
tCHCL
tCLCH
Clock pulse width high
Clock pulse width low
SDA fall time
600
1300
20
(1)
300
900
tDL1DL2
tDXCX
tCLDX
tCLQX
tSU:DAT
tHD:DAT
tDH
Data in set up time
Data in hold time
Data out hold time
100
0
200
Clock low to next data valid
(access time)
(2)
tAA
200
ns
tCLQV
(3)
tSU:STA
tHD:STA
tSU:STO
Start condition set up time
Start condition hold time
Stop condition set up time
600
600
600
ns
ns
ns
tCHDX
tDLCL
tCHDH
Time between stop condition and next
start condition
tDHDL
tW
tBUF
tWR
1300
ns
ms
ns
Write time
5
Pulse width ignored (input filter on SCL
and SDA for serial EEPROM)
Single
glitch
tNS
200
1. Sampled only, not 100% tested.
2. To avoid spurious START and STOP conditions, a minimum delay is placed between SCL=1 and the
falling or rising edge of SDA
3. For a reSTART condition, or following a Write cycle.
14/19
M41T00SC64
Package mechanical data
7
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect . The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com
15/19
Package mechanical data
M41T00SC64
Figure 7. SOX18 – 18-lead plastic small outline, 300mils, embedded crystal
D
9
1
h x 45°
C
E
H
A
10
18
A2
ddd
A1
B
e
A1
α
L
SO-J
1. Drawing is not to scale.
Table 9. SOX18 – 18-lead plastic small outline, 300mils, embedded crystal, package
mech.
millimeters
Min
inches
Min
Symbol
Typ
Max
2.69
0.31
2.39
0.51
0.31
11.66
0.10
7.67
–
Typ
Max
0.106
0.012
0.094
0.020
0.012
0.459
0.004
0.302
–
A
A1
A2
B
2.44
0.096
0.006
0.090
0.016
0.008
0.455
0.15
2.29
0.41
C
0.20
D
11.61
1.27
11.56
0.457
0.050
ddd
E
7.57
–
0.298
–
e
H
10.16
0.51
0°
10.52
0.81
8°
0.400
0.020
0°
0.414
0.032
8°
L
a
N
18
18
16/19
M41T00SC64
Order codes
8
Order codes
Table 10. Ordering information scheme
Example:
M41T
00S
C64
MY
6
E
Device type
M41T = Serial RTC
Supply voltage and write protect voltage
00S = VCC = 2.7 to 5.5V
EEPROM density
C64 = 64 Kbit (8192 bit x 8)
Package
MY(1)= SOX18
Temperature range
6 = –40°C to 85°C
Shipping method
E = Lead-free package ECOPACK®, tubes
F = Lead-free package ECOPACK®, tape & reel
1. The SOX18 package includes an embedded 32,768Hz crystal.
For other options, or for more information on any aspect of this device, please contact the
ST Sales Office nearest you.
17/19
Revision history
M41T00SC64
9
Revision history
Table 11. Revision history
Date
Version
Description
20-Jul-2006
25-Sep-2006
1
2
First Edition
Added information on EEPROM density and ECOPACK® packages in
Table 10: Ordering information scheme
30-Jan-2007
3
Updates in DC and AC parameters (Table 4 and Table 6).
18/19
M41T00SC64
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