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DS1307+ 数据手册 - Thomas & Betts
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DS1307+数据手册
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GENERAL DESCRIPTION
The DS1307 serial real-time clock (RTC) is a low-
power, full binary-coded decimal (BCD) clock/calendar
plus 56 bytes of NV SRAM. Address and data are
transferred serially through an I
2
C, bidirectional bus.
The clock/calendar provides seconds, minutes, hours,
day, date, month, and year information. The end of
the month date 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 AM/PM indicator. The DS1307 has a
built-in power-sense circuit that detects power failures
and automatically switches to the backup supply.
Timekeeping operation continues while the part
operates from the backup supply.
TYPICAL OPERATING CIRCUIT
BENEFITS AND FEATURES
Completely Manages All Timekeeping Functions
o Real-Time Clock Counts Seconds, Minutes,
Hours, Date of the Month, Month, Day of the
Week, and Year with Leap-Year
Compensation Valid Up to 2100
o 56-Byte, Battery-Backed, General-Purpose
RAM with Unlimited Writes
o Programmable Square-Wave Output Signal
Simple Serial Port Interfaces to Most
Microcontrollers
o I
2
C Serial Interface
Low Power Operation Extends Battery Backup
Run Time
o Consumes Less than 500nA in Battery-
Backup Mode with Oscillator Running
o Automatic Power-Fail Detect and Switch
Circuitry
8-Pin DIP and 8-Pin SO Minimizes Required
Space
Optional Industrial Temperature Range: -40°C to
+85°C Supports Operation in a Wide Range of
Applications
Underwriters Laboratories® (UL) Recognized
PIN CONFIGURATIONS
V
CC
SCL
SDA
X1
X2
V
BAT
GND
SQW/OUT
V
CC
SCL
SDA
X1
X2
V
BAT
GND
SQW/OUT
PDIP (300 mils)SO (150 mils)
TOP VLEW
ORDERING INFORMATION
PART TEMP RANGE VOLTAGE (V)
PIN-PACKAGE TOP MARK*
DS1307+
0°C to +70°C
5.0
8 PDIP (300 mils)
DS1307
DS1307N+
-40°C to +85°C
5.0
8 PDIP (300 mils)
DS1307N
DS1307Z+
0°C to +70°C
5.0
8 SO (150 mils)
DS1307
DS1307ZN+
-40°C to +85°C
5.0
8 SO (150 mils)
DS1307N
DS1307Z+T&R
0°C to +70°C
5.0
8 SO (150 mils) Tape and Reel
DS1307
DS1307ZN+T&R
-40°C to +85°C
5.0
8 SO (150 mils) Tape and Reel
DS1307N
+Denotes a lead-free/RoHS-compliant package.
*A “+” anywhere on the top mark indicates a lead-free package. An “N” anywhere on the top mark indicates an industrial temperature range device.
Underwriters Laboratories, Inc. is a registered certification mark of Underwriters Laboratories, Inc.
DS1307
CPU
V
CC
V
CC
V
CC
SDA
SCL
GND
X2
X1
V
CC
R
PU
R
PU
CRYSTAL
SQW/OUT
V
BAT
R
PU
= t
r
/C
b
DS1307
64 x 8, Serial, I
2
C Real-Time Clock
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