DS1215 datasheet, PDF - EEWORLD Datasheet

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DS1215: Descriptionusing the dallas phantom real time clocks(real-time clock chip); CategoryThe embedded processor and controller Microcontrollers and processors; File Size116KB，15 Pages; ManufacturerDALLAS; Websitehttp://www.dalsemi.com

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DS1215 Overview

using the dallas phantom real time clocks(real-time clock chip)

DS1215 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	DALLAS
Reach Compliance Code	unknown
Other features	BACK-UP & WRITE PROTECTION FOR EXTERNAL SRAM; TIMEKEEPING CURRENT = 1UA; SERIAL 64-BIT PROTOCOL
Information access methods	SERIAL, FIXED PROTOCOL
interrupt capability	N
JESD-30 code	R-PDIP-T16
JESD-609 code	e0
Number of terminals	16
Number of timers
Maximum operating temperature	70 °C
Minimum operating temperature
Package body material	PLASTIC/EPOXY
encapsulated code	DIP
Encapsulate equivalent code	DIP16,.3
Package shape	RECTANGULAR
Package form	IN-LINE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	5 V
Certification status	Not Qualified
Maximum slew rate	5 mA
Maximum supply voltage	5.5 V
Minimum supply voltage	4.5 V
Nominal supply voltage	5 V
surface mount	NO
technology	CMOS
Temperature level	COMMERCIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL
shortest time	1/100 SECOND
Maximum time at peak reflow temperature	NOT SPECIFIED
Volatile	YES
uPs/uCs/peripheral integrated circuit type	TIMER, REAL TIME CLOCK

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DS1215

Phantom Time Chip

FEATURES

PIN ASSIGNMENT

BAT1

GND

CCI

CCO

BAT2

RST

CEI

CEO

ROM/RAM

•

Keeps track of hundredths of seconds, seconds, min-

utes, hours, days, date of the month, months, and

years

•

Adjusts for months with fewer than 31 days

•

Leap year automatically corrected up to 2100

•

No address space required

•

Provides

nonvolatile controller functions for battery

backup of RAM

redundant batteries for high–reliability

applications

16–PIN DIP (300 MIL)

BAT1

GND

CCI

CCO

BAT2

RST

CEI

CEO

ROM/RAM

•

Supports

•

Uses a 32.768 KHz watch crystal

•

Full

±10%

operating range

•

Operating temperature range 0°C to 70°C

•

Space-saving, 16–pin DIP package and SOIC

•

Optional industrial temperature range –40°C to +85°C

(IND)

16–PIN SOIC (300 MIL)

PIN DESCRIPTION

X1, X2

– 32.768 KHz Crystal Connections

– Write Enable

BAT1

– Battery 1 Input

GND

– Ground

– Data In

– Data Out

– ROM/RAM Select

ROM/RAM

– Chip Enable Out

CEO

CEI

– Chip Enable Input

– Output Enable

RST

– Reset

BAT2

– Battery 2 Input

– Switched Supply Output

CCO

– +5 VDC Input

CCI

NOTE: Both pins 5 and 8 must be grounded.

DESCRIPTION

The DS1215 Phantom Time Chip is a combination of a

CMOS timekeeper and a nonvolatile memory controller.

In the absence of power, an external battery maintains

the timekeeping operation and provides power for a

CMOS static RAM. The watch keeps track of hun-

dredths of seconds, seconds, minutes, hours, day, date,

month, and year information. The last day of the month

is automatically adjusted for months with less than 31

days, including correction for leap year every four years.

The watch operates in one of two formats: a 12–hour

mode with an AM/PM indicator or a 24–hour mode. The

nonvolatile controller supplies all the necessary support

circuitry to convert a CMOS RAM to a nonvolatile

memory. The DS1215 can be interfaced with either

RAM or ROM without leaving gaps in memory.

ORDERING INFORMATION

DS1215

DS1215S

DS1215N

DS1215SN

16–pin DIP

16–pin SOIC

16–pin DIP (IND)

16–pin SOIC (IND)

ECopyright

1997 by Dallas Semiconductor Corporation.

patents and other intellectual property rights, please refer to

Dallas Semiconductor data books.

032697 1/15

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