DS1391U-18+

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Analog Devices Inc./Maxim Integrated

IC RTC CLK/CALENDAR SPI 10UMAX

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DocumentsDatasheet Tips for Writing Bulletproof Real-Time Clock Control Code

DS1391U-18+

Active

Analog Devices Inc./Maxim Integrated

IC RTC CLK/CALENDAR SPI 10UMAX

Deep-Dive with AI

DocumentsDatasheet Tips for Writing Bulletproof Real-Time Clock Control Code

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	DS1391U-18+

Current - Timekeeping (Max)	100 µA
Features	Trickle-Charger, Leap Year, Alarm, Square Wave Output
Interface	SPI
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	10-MSOP, 10-TFSOP
Package / Case [x]	3 mm
Package / Case [x]	0.118 in
Supplier Device Package	10-uMAX/uSOP
Time Format	HH:MM:SS:hh (12/24 hr)
Type	Clock/Calendar
Voltage - Supply [Max]	1.89 V
Voltage - Supply [Min]	1.71 V
Voltage - Supply, Battery [Max]	3.7 V
Voltage - Supply, Battery [Min]	1.3 V

DS1391 Series

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Time Format	Interface	Type	Current - Timekeeping (Max)	Package / Case	Package / Case [x]	Package / Case [x]	Features	Voltage - Supply, Battery [Min]	Voltage - Supply, Battery [Max]	Mounting Type	Supplier Device Package
Analog Devices Inc./Maxim Integrated DS1391U-18	1.89 V	1.71 V	85 °C	-40 °C	HH:MM:SS:hh (12/24 hr)	4-Wire Serial SPI	Clock/Calendar	100 µA	10-MSOP 10-TFSOP	3 mm	0.118 in	Alarm Leap Year Square Wave Output Trickle-Charger	1.3 V	3.7 V	Surface Mount	10-uMAX
Analog Devices Inc./Maxim Integrated DS1391U-3+T&R	3.3 V	2.7 V	85 °C	-40 °C	HH:MM:SS:hh (12/24 hr)	SPI	Clock/Calendar		10-MSOP 10-TFSOP	3 mm	0.118 in	Alarm Leap Year Square Wave Output Trickle-Charger	1.3 V	3.7 V	Surface Mount	10-uMAX/uSOP
Analog Devices Inc./Maxim Integrated DS1391U-33+T&R	5.5 V	2.97 V	85 °C	-40 °C	HH:MM:SS:hh (12/24 hr)	SPI	Clock/Calendar	175 µA	10-MSOP 10-TFSOP	3 mm	0.118 in	Alarm Leap Year Square Wave Output Trickle-Charger	1.3 V	5.5 V	Surface Mount	10-uMAX/uSOP
Analog Devices Inc./Maxim Integrated DS1391U-33+	5.5 V	2.97 V	85 °C	-40 °C	HH:MM:SS:hh (12/24 hr)	SPI	Clock/Calendar	175 µA	10-MSOP 10-TFSOP	3 mm	0.118 in	Alarm Leap Year Square Wave Output Trickle-Charger	1.3 V	5.5 V	Surface Mount	10-uMAX/uSOP
Analog Devices Inc./Maxim Integrated DS1391U-33	5.5 V	2.97 V	85 °C	-40 °C	HH:MM:SS:hh (12/24 hr)	SPI	Clock/Calendar	175 µA	10-MSOP 10-TFSOP	3 mm	0.118 in	Alarm Leap Year Square Wave Output Trickle-Charger	1.3 V	5.5 V	Surface Mount	10-uMAX/uSOP
Analog Devices Inc./Maxim Integrated DS1391U-18+	1.89 V	1.71 V	85 °C	-40 °C	HH:MM:SS:hh (12/24 hr)	SPI	Clock/Calendar	100 µA	10-MSOP 10-TFSOP	3 mm	0.118 in	Alarm Leap Year Square Wave Output Trickle-Charger	1.3 V	3.7 V	Surface Mount	10-uMAX/uSOP
Analog Devices Inc./Maxim Integrated DS1391U-3+	3.3 V	2.7 V	85 °C	-40 °C	HH:MM:SS:hh (12/24 hr)	SPI	Clock/Calendar		10-MSOP 10-TFSOP	3 mm	0.118 in	Alarm Leap Year Square Wave Output Trickle-Charger	1.3 V	3.7 V	Surface Mount	10-uMAX/uSOP

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 5.99
		10	$ 4.59
		50	$ 4.03
		100	$ 3.86
		150	$ 2.59
		250	$ 3.67
		500	$ 3.56
		1000	$ 3.47
		2500	$ 3.38

Description

General part information

DS1391 Series

Real Time Clock (RTC) IC Clock/Calendar SPI 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Documents

Technical documentation and resources