Transport Nodes, Access Nodes, Add/Drop Multiplexers, and Digital Cross-Connects



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Maxim > Solutions > Transport Nodes, Access Nodes, Add/Drop Multiplexers, and Digital Cross-Connects

Real-Time Clocks

DATA SHEETS

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Title / Parts

Key Advantages

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Low-Voltage SPI/3-Wire RTCs with Trickle Charger
DS1390, DS1391, DS1392, DS1393

Low-Voltage SPI™/3-Wire RTCs with Trickle Charger have the Broadest Feature Set and the Smallest Footprint in Their Class

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RTC with Constant-Voltage Trickle Charger
DS12CR887, DS12R885, DS12R887

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I²C RTC with 56-Byte NV RAM
DS1338, DS1338C, DS1338U, DS1338Z

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I²C Serial Real-Time Clock
DS1339, DS1339C, DS1339U

RTC Provides System Flexibility with Multiple Programmable Features

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I²C Serial Real-Time Clock
DS1337, DS1337C

Industry's Smallest I²C RTC with Two Time-of-Day Alarms

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Total-Elapsed-Time Recorder with Alarm
DS1682

Industry's First Crystal-less Elapsed Time Counter

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Real-Time Event Recorder
DS1678

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Portable System Controller
DS1677

QV PDF

Portable System Controller
DS1673

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I²C 32-Bit Binary Counter RTC
DS1672

Low-Voltage, Serial Timekeeping Chip Combines an Ultra-Low-Voltage Clock with Sophisticated Power-Monitoring Circuitry, Power-Fail Switches, and a Switch to Optional Trickle-Charging, Replacing Several Discrete Components with One Chip

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Portable System Controller
DS1670

Key Specifications: Timekeeping & Real-Time Clocks

Part Number

Functions

Time Format (hh = sec/100)

Date Format

Interface

Supply Voltage (V)

Time- keeping Current (typ) (nA)

C_L, Load Capacitance (pF)

Memory Type

Memory Size (Bytes)

Number of Time of Day Alarms

Features

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

DS1390

HH:MM:SS:hh

YY-MM-DD

SPI

1.8
3
3.3
5

500

None

•	Square-Wave Output

•	Trickle Charger

uSOP/10

-40 to +85

DS1391

HH:MM:SS:hh

YY-MM-DD

SPI

1.8
3
3.3
5

500

None

•

µP Reset

•	Power Fail Output

•	Trickle Charger

uSOP/10

-40 to +85

DS1392

HH:MM:SS:hh

YY-MM-DD

3-Wire

1.8
3
3.3
5

500

None

•	Square-Wave Output

•	Trickle Charger

uSOP/10

-40 to +85

DS1393

HH:MM:SS:hh

YY-MM-DD

3-Wire

1.8
3
3.3
5

500

None

•

µP Reset

•	Power Fail Output

•	Trickle Charger

uSOP/10

-40 to +85

DS12CR887

HH:MM:SS

YY-MM-DD

Multiplexed

3.3
5

NV SRAM

114

•	Battery + Crystal

•	Periodic Interrupt

•	Square-Wave Output

MOD/24

640

-40 to +85

DS12R885

HH:MM:SS

YY-MM-DD

Multiplexed

3.3
5

800

12.5

NV SRAM

114

•	Periodic Interrupt

•	Square-Wave Output

SOIC/24

118

-40 to +85

DS12R887

HH:MM:SS

YY-MM-DD

Multiplexed

3.3
5

NV SRAM

114

•	Battery + Crystal

•	Periodic Interrupt

•	Square-Wave Output

BGA/48

181

-40 to +85

DS1338

HH:MM:SS

YY-MM-DD

I²C

1.8
3
3.3
5

800

12.5

NV SRAM

•	SOIC Package with Integrated Crystal

•	Square-Wave Output

SOIC/16
SOIC/8
uSOP/8

-40 to +85

DS1339

HH:MM:SS

YY-MM-DD

I²C

2
3
3.3
5

400

None

•	SOIC Package with Integrated Crystal

•	Square-Wave Output

•	Trickle Charger

SOIC/16
uSOP/8

-40 to +85

DS1337

HH:MM:SS

YY-MM-DD

I²C

2
3
3.3
5

425

None

•	SOIC Package with Integrated Crystal

•	Square-Wave Output

PDIP/8
SOIC/16
SOIC/8
uSOP/8

DS1670

•	NV SRAM Control

•	Watchdog Timekeeper

HH:MM:SS

YY-MM-DD

3-Wire

3.3

300

None

•

µP Reset

•	A to D Converter

•	Periodic Interrupt

•	Power Fail Output

SOIC/20
TSSOP/20

0 to +70

DS1672

•	Elapsed Time Counter

Binary

I²C

2
3
3.3

425

None

•	Trickle Charger

PDIP/8
SOIC/8
uSOP/8

-40 to +85

DS1673

•	NV SRAM Control

•	Watchdog Timekeeper

HH:MM:SS

YY-MM-DD

3-Wire

3
5

300

None

•

µP Reset

•	A to D Converter

•	Periodic Interrupt

•	Power Fail Output

SOIC/20
TSSOP/20

0 to +70

DS1677

•	NV SRAM Control

•	Watchdog Timekeeper

HH:MM:SS

YY-MM-DD

3-Wire

300

None

•

µP Reset

•	A to D Converter

•	Periodic Interrupt

•	Power Fail Output

TSSOP/20

0 to +70

DS1682

•	Time/Temperature/Event Recorder

Binary

I²C

3
3.3
5

EEPROM

SOIC/8

-40 to +85

DS1678

HH:MM:SS

YY-MM-DD

I²C

300

12.5

None

PDIP/8
SOIC/8

-40 to +85

See All Timekeeping & Real-Time Clocks (86)