Specification	DS1670E

Current - Timekeeping (Max)	100 µA
Date Format	YY-MM-DD-dd
Features	Watchdog Timer, Alarm, Leap Year
Interface	3-wire Serial
Mounting Type	Surface Mount
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Package / Case	20-TSSOP
Package / Case [x]	0.173 "
Package / Case [y]	4.4 mm
Supplier Device Package	20-TSSOP
Time Format	HH:MM:SS (12/24 hr)
Type	Portable System Controller
Voltage - Supply [Max]	3.63 V
Voltage - Supply [Min]	2.97 V
Voltage - Supply, Battery [Max]	3.7 V
Voltage - Supply, Battery [Min]	2.5 V

DS1670 Series

Portable System Controller

Part	Package / Case	Package / Case [y]	Package / Case [x]	Current - Timekeeping (Max)	Supplier Device Package	Features	Type	Interface	Date Format	Operating Temperature [Max]	Voltage - Supply, Battery [Max]	Voltage - Supply, Battery [Min]	Time Format	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type
Analog Devices Inc./Maxim Integrated DS1670E/T&R	20-TSSOP	4.4 mm	0.173 "	100 µA	20-TSSOP	Alarm Leap Year Watchdog Timer	Portable System Controller	3-wire Serial	YY-MM-DD-dd	70 °C	3.7 V	2.5 V	HH:MM:SS (12/24 hr)	2.97 V	3.63 V	Surface Mount
Analog Devices Inc./Maxim Integrated DS1670E	20-TSSOP	4.4 mm	0.173 "	100 µA	20-TSSOP	Alarm Leap Year Watchdog Timer	Portable System Controller	3-wire Serial	YY-MM-DD-dd	70 °C	3.7 V	2.5 V	HH:MM:SS (12/24 hr)	2.97 V	3.63 V	Surface Mount
Analog Devices Inc./Maxim Integrated DS1670S	20-SOIC (0.295" 7.50mm Width)			100 µA	20-SOIC	Alarm Leap Year Watchdog Timer	Portable System Controller	3-wire Serial	YY-MM-DD-dd	70 °C	3.7 V	2.5 V	HH:MM:SS (12/24 hr)	2.97 V	3.63 V	Surface Mount
Analog Devices Inc./Maxim Integrated DS1670E+T&R	20-TSSOP	4.4 mm	0.173 "	100 µA	20-TSSOP	Alarm Leap Year Watchdog Timer	Portable System Controller	3-wire Serial	YY-MM-DD-dd	70 °C	3.7 V	2.5 V	HH:MM:SS (12/24 hr)	2.97 V	3.63 V	Surface Mount
Analog Devices Inc./Maxim Integrated DS1670E+	20-TSSOP	4.4 mm	0.173 "	100 µA	20-TSSOP	Alarm Leap Year Watchdog Timer	Portable System Controller	3-wire Serial	YY-MM-DD-dd	70 °C	3.7 V	2.5 V	HH:MM:SS (12/24 hr)	2.97 V	3.63 V	Surface Mount
Analog Devices Inc./Maxim Integrated DS1670S+	20-SOIC (0.295" 7.50mm Width)			100 µA	20-SOIC	Alarm Leap Year Watchdog Timer	Portable System Controller	3-wire Serial	YY-MM-DD-dd	70 °C	3.7 V	2.5 V	HH:MM:SS (12/24 hr)	2.97 V	3.63 V	Surface Mount

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	Tube	3700	$ 4.00	<4d

Description

General part information

DS1670 Series

The DS1670 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 DS1670 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 DS1670 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, active-low CEOL, and active-low CEOH pins. The backup energy source used to power the RTC is also used to retain RAM data in the absence of VCCthrough the VCCOpin. The chip-enable outputs to RAM (active-low CEOL and active-low CEOH) are controlled during power transients to prevent data corruption.