DS1394 datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > DS1394

Preview

DS1394: DescriptionLow-Voltage SPI/3-Wire RTCs with Trickle Charger; File Size314KB，26 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

Download Datasheet Compare View All

DS1394 Overview

Low-Voltage SPI/3-Wire RTCs with Trickle Charger

Preview

Download Datasheet

View All

DS1390–DS1394

Low-Voltage SPI/3-Wire RTCs with

Trickle Charger

General Description

The low-voltage serial-peripheral interface (SPI™)

DS1390/DS1391/DS1394 and the low-voltage 3-wire

DS1392/DS1393 real-time clocks (RTCs) are clocks/cal-

endars that provide hundredths of a second, seconds,

minutes, hours, day, date, month, and year information.

The date at the end of the month is automatically

adjusted for months with fewer than 31 days, including

corrections for leap year. The clock operates in either

the 24-hour or 12-hour format with an AM/PM indicator.

One programmable time-of-day alarm is provided. A

temperature-compensated voltage reference monitors

the status of V

and automatically disables the bus

interface and switches to the backup supply if a power

failure is detected. On the DS1390, a single open-drain

output provides a CPU interrupt or a square wave at

one of four selectable frequencies. The DS1391

replaces the SQW/INT pin with a

RST

output/

debounced input.

The DS1390, DS1391, and DS1394 are programmed

serially through an SPI-compatible, bidirectional bus.

The DS1392 and DS1393 communicate over a 3-wire

serial bus, and the extra pin is used for either a sepa-

rate interrupt pin or a

RST

output/debounced input.

All five devices are available in a 10-pin µSOP package,

and are rated over the industrial temperature range.

Reset Output/Debounced Input (DS1391/DS1393)

Separate SQW and INT Output (DS1392)

Trickle-Charge Capability

SPI Supports Modes 0 and 2 (DS1394)

SPI Supports Modes 1 and 3 (DS1390/DS1391)

3-Wire Interface (DS1392/DS1393)

4MHz at 3.0V and 3.3V

1MHz at 1.8V

Three Operating Voltages: 1.8V ±5%, 3.0V ±10%,

and 2.97 to 5.5V (DS1394: 3.3V ±10%)

Industrial Temperature Range: -40°C to +85°C

Underwriters Laboratories (UL) Recognized

Ordering Information

PART

DS1390U-18+

DS1390U-3+

DS1390U-33+

DS1391U-18+

DS1391U-3+

DS1391U-33+

DS1392U-18+

DS1392U-3+

DS1392U-33+

DS1393U-18+

DS1393U-3+

DS1393U-33+

DS1394U-33+

TYP

PIN-

OPERATING

PACKAGE

VOLTAGE (V)

1.8

3.0

3.3

1.8

3.0

3.3

1.8

3.0

3.3

1.8

3.0

3.3

10 µSOP

TOP MARK†

1390 rr-18

1390 rr-3

1390 rr-33

1391 rr-18

1391 rr-3

1391 rr-33

1393 rr-18

1392 rr-3

1392 rr-33

1393 rr-18

1393 rr-3

1393 rr-33

1394 rr-33

Applications

Hand-Held Devices

GPS/Telematics Devices

Embedded Time Stamping

Medical Devices

Features

Real-Time Clock Counts Hundredths of Seconds,

Seconds, Minutes, Hours, Day, Date, Month, and

Year with Leap-Year Compensation Valid Up to

2100

Output Pin Configurable as Interrupt or Square

Wave with Programmable Frequency of

32.768kHz, 8.192kHz, 4.096kHz, or 1Hz

(DS1390/DS1393/DS1394 Only)

One Time-of-Day Alarm

Power-Fail Detect and Switch Circuitry

Note:

All devices are rated for the -40°C to +85°C operating

temperature range.

+Denotes

a lead(Pb)-free/RoHS-compliant package.

†A

“+” anywhere on the top mark denotes a lead(Pb)-

free/RoHS-compliant package.

rr = Revision code on second line of top mark.

Typical Operating Circuits and Pin Configurations appear at

end of the data sheet.

SPI is a trademark of Motorola, Inc.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-4898; Rev 4; 10/12

DS1394 Related Products

	DS1394	DS1390U-33/V+	DS1390_09	DS1394U-33+	DS1390U-3+	DS1391U-18+	DS1391U-33+	DS1392U-33+	DS1393U-3+	DS1393U-33+
Description	Low-Voltage SPI/3-Wire RTCs with Trickle Charger	Low-Voltage SPI/3-Wire RTCs with Trickle Charger	Low-Voltage SPI/3-Wire RTCs with Trickle Charger	Low-Voltage SPI/3-Wire RTCs with Trickle Charger	Low-Voltage SPI/3-Wire RTCs with Trickle Charger	Low-Voltage SPI/3-Wire RTCs with Trickle Charger	Low-Voltage SPI/3-Wire RTCs with Trickle Charger	Low-Voltage SPI/3-Wire RTCs with Trickle Charger	Low-Voltage SPI/3-Wire RTCs with Trickle Charger	Low-Voltage SPI/3-Wire RTCs with Trickle Charger
Is it Rohs certified?	-	conform to	-	conform to	conform to	conform to	conform to	conform to	conform to	conform to
Maker	-	Maxim	-	Maxim	Maxim	Maxim	Maxim	-	Maxim	Maxim
Parts packaging code	-	SOIC	-	SOIC	SOIC	SOIC	SOIC	SOIC	SOIC	SOIC
package instruction	-	TSSOP, TSSOP10,.19,20	-	TSSOP, TSSOP10,.19,20	TSSOP, TSSOP10,.19,20	TSSOP, TSSOP10,.19,20	TSSOP, TSSOP10,.19,20	TSSOP, TSSOP10,.19,20	TSSOP, TSSOP10,.19,20	TSSOP, TSSOP10,.19,20
Contacts	-	10	-	10	10	10	10	10	10	10
Reach Compliance Code	-	compli	-	compli	compliant	compli	compliant	compli	compli	compli
ECCN code	-	EAR99	-	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
maximum clock frequency	-	0.032 MHz	-	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz
Information access methods	-	SERIAL, 3-WIRE	-	SERIAL, 2-WIRE/I2C	SERIAL, 3-WIRE	SERIAL, 3-WIRE	SERIAL, 3-WIRE	SERIAL, 2-WIRE/I2C	SERIAL, 2-WIRE/I2C	SERIAL, 2-WIRE/I2C
interrupt capability	-	Y	-	Y	Y	Y	Y	Y	Y	Y
JESD-30 code	-	S-PDSO-G10	-	S-PDSO-G10	S-PDSO-G10	S-PDSO-G10	S-PDSO-G10	S-PDSO-G10	S-PDSO-G10	S-PDSO-G10
JESD-609 code	-	e3	-	e3	e3	e3	e3	e3	e3	e3
length	-	3 mm	-	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm
Number of terminals	-	10	-	10	10	10	10	10	10	10
Number of timers	-	1	-	1	1	1	1	1	1	1
Maximum operating temperature	-	85 °C	-	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-	-40 °C	-	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Package body material	-	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	TSSOP	-	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP
Encapsulate equivalent code	-	TSSOP10,.19,20	-	TSSOP10,.19,20	TSSOP10,.19,20	TSSOP10,.19,20	TSSOP10,.19,20	TSSOP10,.19,20	TSSOP10,.19,20	TSSOP10,.19,20
Package shape	-	SQUARE	-	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE
Package form	-	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	-	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	NOT SPECIFIED	-	260	260	260	260	260	260	260
power supply	-	3.3 V	-	3.3 V	3 V	1.8 V	3.3 V	3.3 V	3 V	3.3 V
Certification status	-	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	1.1 mm	-	1.1 mm	1.1 mm	1.1 mm	1.1 mm	1.1 mm	1.1 mm	1.1 mm
Maximum supply voltage	-	5.5 V	-	5.5 V	3.3 V	1.89 V	5.5 V	5.5 V	3.3 V	5.5 V
Minimum supply voltage	-	2.97 V	-	2.97 V	2.7 V	1.71 V	2.97 V	2.97 V	2.7 V	2.97 V
Nominal supply voltage	-	3.3 V	-	3.3 V	3 V	1.8 V	3.3 V	3.3 V	3 V	3.3 V
surface mount	-	YES	-	YES	YES	YES	YES	YES	YES	YES
technology	-	CMOS	-	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	-	INDUSTRIAL	-	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal form	-	GULL WING	-	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	-	0.5 mm	-	0.5 mm	0.5 mm	0.5 mm	0.5 mm	0.5 mm	0.5 mm	0.5 mm
Terminal location	-	DUAL	-	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
shortest time	-	1/100 SECOND	-	1/100 SECOND	1/100 SECOND	1/100 SECOND	1/100 SECOND	1/100 SECOND	1/100 SECOND	1/100 SECOND
Maximum time at peak reflow temperature	-	NOT SPECIFIED	-	30	30	30	30	30	30	30
Volatile	-	NO	-	NO	NO	NO	NO	NO	NO	NO
width	-	3 mm	-	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm
uPs/uCs/peripheral integrated circuit type	-	TIMER, REAL TIME CLOCK	-	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK
Is it lead-free?	-	-	-	Lead free	Lead free	Lead free	Lead free	Lead free	Lead free	Lead free
Factory Lead Time	-	-	-	6 weeks	6 weeks	6 weeks	6 weeks	6 weeks	-	6 weeks
Humidity sensitivity level	-	-	-	1	1	1	1	1	1	1
Terminal surface	-	-	-	MATTE TIN	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)

Recommended Resources

Square wave generation circuit

Homemade multimedia active speaker 02

Color changing eyes electronic cat circuit

Driving DC motor circuits with AC power

Mobile phone charger power conversion circuit

100kHz self-excited multivibrator

How to use timed interrupt to detect key status in 51 single chip matrix 4X4 array keyboard.: I watched Guo Tianxiang’s video. . The function code for scanning the keyboard is too long. Is there anything simpler? . [code] uchar keyscan() { P3=0xfe; temp=P3; temp=temp&0xf0; while(temp!=0xf0) { ...; bg2ifb Embedded System

GPIO interrupts for sys/bios: When using GPIO external interrupts in sys/bios, that is, sending external interrupts to GPIO5 through FPGA, and then the DSP responds to the interrupt service program. In addition to configuring HWI ...; jdcklb DSP and ARM Processors

I want to buy a robot for learning...: Has anyone here used a robot? Can anyone recommend one?...; xifangyu Robotics Development

A speaker that produces sound through resonance: Innosound has no speaker or cabinet. Its sound-generating principle is different from that of traditional speakers that rely on their own cabinets. It can produce perfect sound as long as it resonates...; xyh_521 Creative Market

Regarding suggestions for active medical section, welcome to criticize: Since the medical electronics section is not well-received, I want to hold an event to increase its popularity. The event is initially planned to let me offer suggestions for medical electronics. I su...; 梦之旅 Suggestions & Announcements

Request the programming method of the LED text dot matrix display page animation switching function.: I recently developed an LED dot matrix screen. The static display is very stable, but I have no idea about the dynamic display. I have never worked with dot matrix screens before, so I would like to a...; 大赛 Embedded System

Shortcut: L0 L1 L2 L3 L4 L5 L6 L7 L8 L9 LA LB LC LD LE LF LG LH LI LJ LK LL LM LN LO LP LQ LR LS LT LU LV LW LX LY LZ M0 M1 M2 M3 M4 M5 M6 M7 M8 M9 MA MB MC MD ME MF MG MH MI MJ MK ML MM MN MO MP MQ MR MS MT MU MV MW MX MY MZ N0 N1 N2 N3 N4 N5 N6 N7 N8 NA NB NC ND NE NF NG NH NI NJ NK NL NM NN NO NP NQ NR NS NT NU NV NX NZ O0 O1 O2 O3 OA OB OC OD OE OF OG OH OI OJ OK OL OM ON OP OQ OR OS OT OV OX OY OZ P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 PA PB PC PD PE PF PG PH PI PJ PK PL PM PN PO PP PQ PR PS PT PU PV PW PX PY PZ Q1 Q2 Q3 Q4 Q5 Q6 Q8 Q9 QA QB QC QE QF QG QH QK QL QM QP QR QS QT QV QW QX QY R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 RA RB RC RD RE RF RG RH RI RJ RK RL RM RN RO RP RQ RR RS RT RU RV RW RX RY RZ

Popular Components