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DS1673-5 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS1673-5 Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 18 page  1 of 18 REV: 080805 GENERAL DESCRIPTION The DS1673 portable system controller is a circuit that incorporates many of the functions necessary for low-power portable products integrated into one chip. The device provides a real-time clock (RTC), NV RAM controller, microprocessor monitor, and a 3-channel, 8-bit analog-to-digital converter (ADC). Communication with the DS1673 is established through a simple 3-wire interface. The RTC provides seconds, minutes, hours, day, date, month, and year information with leap year compensation. The RTC also provides an alarm interrupt. This interrupt works when the DS1673 is powered by the system power supply or when in battery-backup operation, so the alarm can be used to wake up a system that is powered down. Automatic backup and write protection of an external SRAM is provided through the VCCO, CEOL, and CEOH pins. The backup energy source used to power the RTC is also used to retain RAM data in the absence of VCC through the VCCO pin. The chip- enable outputs to RAM ( CEOL and CEOH) are controlled during power transients to prevent data corruption. ORDERING INFORMATION PART* VOLTAGE (V) PIN- PACKAGE TOP MARK† DS1673E-3 3.0 20 TSSOP DS1673-3 DS1673E-3+ 3.0 20 TSSOP DS1673-3 DS1673E-5 5.0 20 TSSOP DS1673-5 DS1673E-3/ T&R 3.0 20 TSSOP DS1673-3 DS1673E-3+ T&R 3.0 20 TSSOP DS1673-3 DS1673E-5/ T&R 5.0 20 TSSOP DS1673-5 DS1673S-3 3.0 20 SO DS1673S-3 DS1673S-5 5.0 20 SO DS1673S-5 * All devices are specified over the 0°C to +70°C operating range. † A “‘+” anywhere on the top mark denotes a lead-free device. + Denotes a lead-free/RoHS-compliant device. FEATURES § Provides Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap Year Compensation Valid Up to 2100 Power-Control Circuitry Supports System Power-On from Day/Time Alarm § Microprocessor Monitor Halts Microprocessor During Power Fail Automatically Restarts Microprocessor after Power Failure Monitors Pushbutton for External Override Halts and Resets an Out-of-Control Microprocessor § NV RAM Control Automatic Battery Backup and Write Protection to External SRAM § 3-Channel, 8-Bit ADC § Simple 3-Wire Interface § +3.0V or +5.0V Operation PIN CONFIGURATION DS1673 Portable System Controller www.maxim-ic.com 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 ST VCC X1 X2 AIN0 AIN1 AIN2 RST BLE BHE VBAT VCCO SCLK I/O CS CEI CEOL CEOH INT GND TSSOP (4.4mm) SO (300 mils) DS1673 TOP VIEW |
Similar Part No. - DS1673-5 |
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Similar Description - DS1673-5 |
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