DS1707 Dallas Semiconductor, DS1707 Datasheet
DS1707
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DS1707 Summary of contents
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... DIP and 8–pin SOIC packages 8–pin DIP, 8–pin SOIC and 8–pin –SOP packages available Industrial temperature range – +85 C DESCRIPTION The DS1707/DS1708 3.3 or 5.0 Volt MicroMonitor moni- tors three vital conditions for a microprocessor: power supply, voltage sense, and external override. A preci- sion temperature–compensated ...
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... DC voltage level closer to the main system power input. Since the IN trip point V ues for R1 and R2 can be determined by the equation as shown in Figure 5. DS1707/DS1708 requires that the voltage at the IN pin be limited to V voltage at the supply being monitored (V falls below be derived as shown in Figure 5. A simple approach to ...
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... PUSHBUTTON RESET CONTROLLED BY NMI Figure 3 UPSTREAM SUPPLY VOLTAGE DIGITAL SAMPLER DIGITAL SAMPLER LEVEL SENSE AND DEBOUNCE PBRST V CC DS1708 GND IN PBRST DS1707 GND IN DIGITAL DELAY RST RST RST 8051 NC NMI INT0 RST RST RST NC NMI DS1707/DS1708 NMI RST RST P P 010996 3/9 ...
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... DS1707/DS1708 TIMING DIAGRAM: PUSHBUTTON RESET Figure 4 PBRST RST RST NON–MASKABLE INTERRUPT CIRCUIT EXAMPLE Figure 5 V SENSE SENSE Example: V SENSE V = 3.3 volts CC 10K = R2 4.70 Therefore: x 3.3 1.25 R1 4.5 010996 4/9 t PDLY PBRST RST V RST CC DS1708 GND NC NMI 1.25 V MAX R2 = 4.70 volts at the trip point 12 ...
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... TIMING DIAGRAM: NON–MASKABLE INTERRUPT Figure 6 V > 1.25V IN V TP(MAX) NMI TIMING DIAGRAM: POWER DOWN Figure RST RST TP(MIN) t IPD CCTP(MAX) V CCTP V CCTP(MIN) t RPD TP(MAX TP(MIN) t IPD V OH RST SLEWS WITH V CC DS1707/DS1708 010996 5/9 ...
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... DS1707/DS1708 TIMING DIAGRAM: POWER UP Figure 010996 6 CCTP(MAX) V CCTP V CCTP(MIN) t RPU RST RST RST RST ...
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... Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. RECOMMENDED DC OPERATING CONDITIONS PARAMETER Supply Voltage PBRST Input High Level PBRST Input Low Level DC ELECTRICAL CHARACTERISTICS PARAMETER V Trip Point DS1707 CC V Trip Point DS1708 CC V Trip Point DS1708T CC V Trip Point DS1708S ...
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... DS1707/DS1708 AC ELECTRICAL CHARACTERISTICS PARAMETER PBRST = V IL Reset Active Time V Detect to RST and RST CC V Slew Rate CC V Detect to RST and RST CC V Slew Rate CC PBRST Stable Low to RST and RST VIN Detect to NMI NOTES: 1. All voltages are referenced to ground. 2. PBRST is internally pulled ...
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... PART MARKING CODES 8–PIN –SOP and D represents the device type and tolerance. ABCD 707_ – DS1707 708_ – DS1708 708R – DS1708R 708S – DS1708S 708T – DS1708T WWY represents the device manufacturing Work Week, and Year ABCD ...