參數(shù)資料
型號(hào)： M41T256YMT7TR
廠商： STMICROELECTRONICS
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： 0 TIMER(S), REAL TIME CLOCK, PDSO44
封裝： 0.330 INCH, PLASTIC, SOIC-44
文件頁(yè)數(shù)： 13/27頁(yè)
文件大?。?/td> 523K
代理商： M41T256YMT7TR
M41T256Y
20/27
Table 8. DC Characteristics
Note: 1. Valid for Ambient Operating Temperature: TA = –25 to 70°C; VCC = 4.5 to 5.5V (except where noted).
2. Outputs deselected.
3. For RST and FT pin (Open Drain).
Table 9. Crystal Electrical Characteristics (Externally Supplied)
Note: 1. STMicroelectronics recommends the KDS DT-38: 1TA/1TC252E127, Tuning Fork Type (thru-hole) or the DMX-26S:
1TJS125FH2A212, (SMD) quartz crystal for industrial temperature operations. KDS can be contacted at kouhou@kdsj.co.jp or ht-
tp://www.kdsj.co.jp for further information on this crystal type.
2. Load capacitors are integrated within the M41T256Y. Circuit board layout considerations for the 32.768kHz crystal of minimum trace
lengths and isolation from RF generating signals should be taken into account.
Sym
Parameter
Test Condition(1)
Min
Typ
Max
Unit
IBAT
Battery Current OSC ON
TA = 25°C, VCC = 0V, VBAT = 3.0V
1.5
1.9
A
Battery Current OSC OFF
1.0
1.4
A
ICC1
Supply Current
f = 400kHz
1.4
3.0
mA
ICC2
Supply Current (Standby)
SCL, SDA = VCC – 0.3V
1.0
2.5
mA
ILI
Input Leakage Current
0V
≤ VIN ≤ VCC
±1
A
ILO
(2)
Output Leakage Current
0V
≤ VOUT ≤ VCC
±1
A
VIH
Input High Voltage
0.7VCC
VCC + 0.3
V
VIHB
Input High Voltage in Battery Back-
up for Tamper Pin
VBAT –
Vdiode
VBAT
V
VIL
Input Low Voltage
–0.3
0.3VCC
V
VBAT
Battery Voltage
2.5
3.5
V
VOH
Output High Voltage
VCC + 0.3
V
VOL
Output Low Voltage
IOL = 3.0mA
0.4
V
Output Low Voltage (Open Drain)(3)
IOL = 10mA
0.4
V
VPFD
Power Fail Deselect
4.20
4.50
V
VSO
Battery Back-up Switchover
VBAT
V
RSW
Switch Resistance on Tamper Pin
500
Symbol
Parameter(1,2)
Typ
Min
Max
Unit
f0
Resonant Frequency
32.768
kHz
RS
Series Resistance
35
k
CL
Load Capacitance
12.5
pF
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