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参数资料
| 型号： | M48T212A-85MH6 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| 封装： | HATLESS, PLASTIC, SOIC-44 |
| 文件页数： | 30/30页 |
| 文件大小： | 155K |
| 代理商： | M48T212A-85MH6 |
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M48T212A
Table 5. DC Characteristics
Note: 1. Valid for Ambient Operating Temperature: TA = 0 to 70°C or –40 to 85°C; VCC = 3.0 to 3.6V (except where noted).
2. Outputs deselected.
3. RSTIN1 and RSTIN2 internally pulled-up to VCC through 100K resistor. WDI internally pulled-down to VSS through 100K resistor.
4. For IRQ/FT & RST pins (Open Drain).
5. Conditioned outputs (E1CON -E2CON) can only sustain CMOS leakage currents in the battery back-up mode. Higher leakage cur-
rents will reduce battery life.
6. External SRAM must match TIMEKEEPE R SUPERV ISOR chip VCC specification.
7. When fully charged.
Table 6. Crystal Electrical Characteristics (Externally Supplied)
Note: 1. Load capacitors are integrated within the M48T212A. Circuit board layout considerations for the 32kHz crystal of minimum trace
lengths and isolation from RF generating signals should be taken into account. ST recommends the KDS DT-38 Tuning Fork Type
quartz crystal for all temperature operations. KDS can be contacted at 913-491-6825 or at
http:// www.kdsj.co.jp for forther informa-
tion on this crystal type.
2. At 25
°C.
Symbol
Parameter
Test Condit ion(1)
Min
Typ
Max
Unit
ILI
(3)
Input Leakage Current
0V
≤ VIN ≤ VCC
±1
A
ILO
(2)
Output Leakage Current
0V
≤ VOUT ≤ VCC
±1
A
ICC
Supply Current
E=VIL
Outputs open
410
mA
ICC1
Supply Current (Standby) TTL
E= VIH
3mA
ICC2
Supply Current (Standby) CMOS
E = VCC –0.2
2
mA
IBAT
Battery Current OSC ON
575
800
nA
Battery Current OSC OFF
100
nA
VIL
Input Low Voltage
–0.3
0.8
V
VIH
Input High Voltage
2.0
VCC +0.3
V
VOL
Output Low Voltage
IOL = 2.1mA
0.4
V
Output Low Voltage (open drain)(4)
IOL = 10mA
0.4
V
VOH
Output High Voltage
IOH = –1.0mA
2.4
V
VOHB
(5)
VOH Battery Back-up
IOUT2 = –1.0A
2.0
3.6
V
IOUT1
(6)
VOUT Current (Active)
VOUT1 >VCC –0.3
70
mA
IOUT2
VOUT Current (Battery Back-up)
VOUT2 >VBAT –0.3
100
A
VPFD
Power-fail Deselect Voltage
2.7
2.9
3.0
V
VSO
Battery Back-up Switchover Voltage
VPFD –100mV
V
VBAT
Battery Voltage
3.0
V
VCAP
Capacitor Voltage (7)
VCC
V
Symbol
Description(1,2)
Min
Typ
Max
Unit
fO
Resonant Frequency
32,768
kHz
RS
Series Resistance
50
70
k
CL
Load Capacitance
12.5
pF
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相关代理商/技术参数 |
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|---|---|
| M48T212A-85MH6TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.3V TIMEKEEPER CONTROLLER |
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| M48T212V | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.3V TIMEKEEPER supervisor |
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