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參數(shù)資料
| 型號(hào)： | M48T212V-70MH1 |
| 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： | SNAPHAT, PLASTIC, SO-44 |
| 文件頁數(shù)： | 20/23頁 |
| 文件大小： | 150K |
| 代理商： | M48T212V-70MH1 |
M48T212Y, M48T212V
6/23
Table 7B. DC Characteristics for M48T212Y
(TA = 0 to 70°C; VCC = 4.5V to 5.5V)
Note: 1. Outputs deselected.
2. RSTIN1 and RSTIN2 internally pulled-up to VCC through 100K resistor. WDI internally pulled-down to VSS through 100K resistor.
3. For IRQ/FT & RST pins (Open Drain).
4. Conditioned outputs (E1CON -E2CON) can only sustain CMOS leakage currents in the battery back-up mode. Higher leakage cur-
rents will reduce battery life.
5. External SRAM must match TIMEKEE PER Controller chip VCC specification.
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
ILI
(1,2)
Input Leakage Current
0V
≤ VIN ≤ VCC
±1
A
ILO
(1)
Output Leakage Current
0V
≤ VOUT ≤ VCC
±1
A
ICC
Supply Current
Outputs open
8
15
mA
ICC1
Supply Current (Standby) TTL
E= VIH
5mA
ICC2
Supply Current (Standby) CMOS
E= VCC –0.2
3mA
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
2.2
VCC + 0.3
V
VOL
Output Low Voltage
IOL = 2.1mA
0.4
V
Output Low Voltage (open drain) (3)
IOL = 10mA
0.4
V
VOH
Output High Voltage
IOH = –1.0mA
2.4
V
VOHB
(4)
VOH Battery Back-up
IOUT2 = –1.0A
2.0
3.6
V
IOUT1
(5)
VOUT Current (Active)
VOUT1 >VCC –0.3
100
mA
IOUT2
VOUT Current (Battery Back-up)
VOUT2 >VBAT –0.3
100
A
VPFD
Power-fail Deselect Voltage
4.2
4.35
4.5
V
VSO
Battery Back-up Switchover Voltage
3.0
V
VBAT
Battery Voltage
3.0
V
The M48T212Y/V also has its own Power-Fail De-
tect circuit. This control circuitry constantly moni-
tors the supply voltage for an out of tolerance
condition. When VCC is out of tolerance, the circuit
write protects the TIMEKEEPER register data and
external SRAM, providing data security in the
midst of unpredictable system operation. As VCC
falls, the control circuitry automatically switches to
the battery, maintaining data and clock operation
until valid power is restored.
Address Decoding
The M48T212Y/V accommodates 4 address lines
(A3-A0) which allow access to the sixteen bytes of
the TIMEKEEPER clock registers. All TIMEKEEP-
ER registers reside in the controller chip itself. All
TIMEKEEPER registers are accessed by enabling
E (Chip Enable).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T212V-70MH1E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-70MH1F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-70MH1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-70MH6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-70MH6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
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