參數(shù)資料
型號(hào)： M41ST84Y
廠商： 意法半導(dǎo)體
英文描述： 5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS
中文描述： 5.0或3.0V，512位64 × 8串行實(shí)時(shí)時(shí)鐘與監(jiān)督職能
文件頁(yè)數(shù)： 30/31頁(yè)
文件大?。?/td> 452K
代理商： M41ST84Y
M41ST84Y, M41ST84W
8/31
Table 5. DC Characteristics
Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.7 to 3.6V or 4.5 to 5.5V (except where noted).
2. RSTIN internally pulled-up to VCC through 100K resistor. WDI internally pulled-down to VSS through 100K resistor.
3. Outputs deselected.
4. For PFO and SQW pins (CMOS).
5. For IRQ/FT/OUT, RST pins (Open Drain): if pulled-up to supply other than VCC, this supply must be equal to, or less than 3.0V when
VCC = 0V (during battery back-up mode).
6. For rechargeable back-up, VBAT (max) may be considered VCC.
Table 6. Crystal Electrical Characteristics (Externally Supplied)
Note: 1. Load capacitors are integrated within the M41ST84Y/W. Circuit board layout considerations for the 32.768 kHz crystal of minimum
trace lengths and isolation from RF generating signals should be taken into account.
2. 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.
Sym
Parameter
Test
Condition(1)
M41ST84Y
M41ST84W
Unit
Min
Typ
Max
Min
Typ
Max
IBAT
Battery Current OSC
ON
TA = 25°C,
VCC = 0V,
VBAT = 3V
400
500
400
500
nA
Battery Current OSC
OFF
50
nA
ICC1
Supply Current
f = 400kHz
1.4
0.75
mA
ICC2
Supply Current
(Standby)
SCL, SDA =
VCC – 0.3V
1
0.50
mA
ILI
(2)
Input Leakage Current
0V
≤ VIN ≤ VCC
±1
A
Input Leakage Current
(PFI)
–25
2
25
–25
2
25
nA
ILO
(3)
Output Leakage
Current
0V
≤ VOUT ≤ VCC
±1
A
VIH
Input High Voltage
0.7VCC
VCC + 0.3
0.7VCC
VCC + 0.3
V
VIL
Input Low Voltage
–0.3
0.3VCC
–0.3
0.3VCC
V
VBAT
Battery Voltage
2.5
3.0
3.5(6)
2.5
3.0
3.5(6)
V
VOH
Output High Voltage(4)
IOH = –1.0mA
2.4
V
VOL
Output Low Voltage
IOL = 3.0mA
0.4
V
Output Low Voltage
(Open Drain)(5)
IOL = 10mA
0.4
V
VPFD
Power Fail Deselect
4.20
4.40
4.50
2.55
2.60
2.70
V
VPFI
PFI Input Threshold
VCC = 5V(Y)
VCC = 3V(V)
1.225
1.250
1.275
1.225
1.250
1.275
V
PFI Hysteresis
PFI Rising
20
70
20
70
mV
VSO
Battery Back-up
Switchover
2.5
V
Symbol
Parameter(1,2)
Typ
Min
Max
Unit
f0
Resonant Frequency
32.768
kHz
RS
Series Resistance
50
k
CL
Load Capacitance
12.5
pF
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