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M41ST85WMH 数据表(PDF) 25 Page - STMicroelectronics

部件名 M41ST85WMH
功能描述  5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR
PDF  34 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M41ST85WMH 数据表(HTML) 25 Page - STMicroelectronics

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M41ST85Y, M41ST85W
Table 11. DC Characteristics
Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5V or 2.7 to 3.6V (except where noted).
2. Measured with VOUT and ECON open.
3. RSTIN1 and RSTIN2 internally pulled-up to VCC through 100KΩ resistor. WDI internally pulled-down to VSS through 100KΩ resistor.
4. Outputs Deselected.
5. External SRAM must match RTC SUPERVISOR chip VCC specification.
6. For PFO and SQW pins (CMOS).
7. Conditioned output (ECON) can only sustain CMOS leakage current in the battery back-up mode. Higher leakage currents will re-
duce battery life.
8. 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).
9. For rechargeable back-up, VBAT (max) may be considered VCC.
Sym
Parameter
Test
Condition(1)
M41ST85Y
M41ST85W
Unit
Min
Typ
Max
Min
Typ
Max
IBAT
(2)
Battery Current OSC
ON
TA = 25°C,
VCC = 0V,
VBAT = 3V
400
500
400
500
nA
Battery Current OSC
OFF
50
50
nA
ICC1
Supply Current
f = 400kHz
1.4
0.75
mA
ICC2
Supply Current
(Standby)
SCL, SDA =
VCC – 0.3V
10.50
mA
ILI
(3)
Input Leakage Current
0V
≤ VIN ≤
VCC
±1
±1
µA
Input Leakage Current
(PFI)
–25
2
25
–25
2
25
nA
ILO
(4)
Output Leakage
Current
0V
≤ VIN ≤
VCC
±1
±1
µA
IOUT1
(5)
VOUT Current (Active)
VOUT1 >
VCC – 0.3V
175
100
mA
IOUT2
VOUT Current (Battery
Back-up)
VOUT2 >
VBAT – 0.3V
100
100
µA
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(9)
2.5
3.0
3.5(9)
V
VOH
Output High Voltage(6)
IOH = –1.0mA
2.4
2.4
V
Pull-up Supply Voltage
(Open Drain)
RST,
IRQ/FT/OUT
5.5
3.6
V
VOHB
(7)
VOH (Battery Back-up)
IOUT2 =
–1.0µA
2.5
2.9
3.5
2.5
2.9
3.5
V
VOL
Output Low Voltage
IOL = 3.0mA
0.4
0.4
V
Output Low Voltage
(Open Drain)(8)
IOL = 10mA
0.4
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
2.5
V



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