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DS1391U-18+ Datasheet(PDF) 2 Page - Maxim Integrated Products |
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DS1391U-18+ Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 26 page Low-Voltage SPI/3-Wire RTCs with Trickle Charger 2 _____________________________________________________________________ ABSOLUTE MAXIMUM RATINGS RECOMMENDED DC OPERATING CONDITIONS (VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted. Typical values are at nominal supply voltage and TA = +25°C, unless otherwise noted.) (Note 1) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Voltage Range on VCC Pin Relative to Ground .....-0.3V to +6.0V Voltage Range on Inputs Relative to Ground ...............................................-0.3V to (VCC + 0.3V) Operating Temperature Range ...........................-40 °C to +85°C Storage Temperature Range .............................-55°C to +125°C Soldering Temperature...........................Refer to the IPC/JEDEC J-STD-020 Specification. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DS139x-33 2.97 3.3 5.50 DS139x-3 2.7 3.0 3.3 Supply Voltage (Note 2) VCC DS139x-18 1.71 1.8 1.89 V Logic 1 VIH (Note 2) 0.7 x VCC VCC + 0.5 V Logic 0 VIL (Note 2) -0.3 +0.3 x VCC V Supply Voltage, Pullup SQW/ INT, SQW, INT, VCC = 0V VPU (Note 2) 5.5 V -33 1.3 3.0 VCC(MAX) -3 1.3 3.0 3.7 VBACKUP Voltage (Note 2) VBACKUP -18 1.3 3.0 3.7 V -33 2.70 2.88 2.97 -3 2.45 2.6 2.70 Power-Fail Voltage (Note 2) VPF -18 1.51 1.6 1.71 V R1 (Notes 3, 4) 250 R2 (Notes 3, 5) 2000 Trickle-Charge Current-Limiting Resistors R3 (Notes 3, 6) 4000 Input Leakage ILI (Note 7) -1 +1 μA I/O Leakage ILO (Note 8) -1 +1 μA RST Pin I/O Leakage ILORST (Note 9) -200 +10 μA -33, -3 (VOH = 0.85 x VCC) -1 DOUT Logic 1 Output IOHDOUT -18 (VOH = 0.80 x VCC) 0.750 mA -33, -3 (VOL = 0.15 x VCC) 3 DOUT Logic 0 Output IOHDOUT -18 (VOL = 0.20 x VCC) 2 mA VCC > 1.71V; VOL = 0.4V 3.0 mA Logic 0 Output (DS1390/DS1393/DS1394 SQW/ INT; DS1392 SQW, INT; DS1391/DS1393 RST) IOLSIR 1.3V < VCC < 1.71V; VOL = 0.4V 250 μA -33 2 -3 2 mA VCC Active Supply Current (Note 10) ICCA -18 500 μA |
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