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M48T212A Datasheet(PDF) 5 Page - STMicroelectronics |
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M48T212A Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 20 page 5/20 M48T212A Table 6. Capacitance (1) (TA = 25 °C, f = 1 MHz) Note: 1. Sampled only, not 100% tested. 2. Outputs deselected. Table 7. DC Characteristics (TA = 0 to 70°C; VCC = 3V to 3.6V) Note: 1. Outputs deselected. 2. RSTIN1 and RSTIN2 internally pulled-up to VCC through 100KΩ resistor. WDI internally pulled-down to VSS through 100KΩ 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 TIMEKEEPER Controller chip VCC specification. 6. When fully charged. Symbol Parameter Test Condition Min Max Unit CIN Input Capacitance VIN = 0V 10 pF COUT (2) Input/Output Capacitance VOUT = 0V 10 pF Symbol Parameter Test Condition Min Typ Max Unit ILI (1,2) Input Leakage Current 0V ≤ VIN ≤ VCC ±1 µA ILO (1) Output Leakage Current 0V ≤ VOUT ≤ VCC ±1 µA ICC Supply Current Outputs Open 4 10 mA ICC1 Supply Current (Standby) TTL E = VIH 3mA ICC2 Supply Current (Standby) CMOS E = VCC –0.2 2mA 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) (3) IOL = 10mA 0.4 V VOH Output High Voltage IOH = –1.0mA 2.4 V VOHB (4) VOH Battery Back-up IOUT2 = –1.0µA 2.0 3.6 V IOUT1 (5) VOUT Current (Active) VOUT1 > VCC –0.3 70 mA IOUT2 VOUT Current (Battery Back-up) VOUT2 > VBAT –0.3 100 µA 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 (6) VCC V |
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