DS1306E+ Maxim Integrated Products, DS1306E+ Datasheet

IC RTC SERIAL ALARM 20-TSSOP

DS1306E+

Manufacturer Part Number
DS1306E+
Description
IC RTC SERIAL ALARM 20-TSSOP
Manufacturer
Maxim Integrated Products
Type
Clock/Calendar/Alarmr
Datasheet

Specifications of DS1306E+

Memory Size
96B
Time Format
HH:MM:SS (12/24 hr)
Date Format
YY-MM-DD-dd
Interface
SPI, 3-Wire Serial
Voltage - Supply
2 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP
Function
Clock/Calendar/Alarm
Rtc Memory Size
96 Byte
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2 V
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Rtc Bus Interface
Serial (3-Wire, SPI)
Supply Current
1.28 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
SPI is a trademark of Motorola, Inc.
FEATURES
 Real-Time Clock (RTC) Counts Seconds,
 96-Byte, Battery-Backed NV RAM for Data
 Two Time-of-Day Alarms, Programmable on
 1Hz and 32.768kHz Clock Outputs
 Supports Motorola SPI
 Burst Mode for Reading/Writing Successive
 Dual-Power Supply Pins for Primary and
 Optional Trickle Charge Output to Backup
 2.0V to 5.5V Operation
 Optional Industrial Temperature Range:
 Available in Space-Efficient, 20-Pin TSSOP
 Underwriters Laboratory (UL) Recognized
www.maxim-ic.com
19-5056; Rev 12/09
Minutes, Hours, Date of the Month, Month,
Day of the Week, and Year with Leap-Year
Compensation Valid Up to 2100
Storage
Combination of Seconds, Minutes, Hours,
and Day of the Week
Interface) Modes 1 and 3 or Standard 3-Wire
Interface
Addresses in Clock/RAM
Backup Power Supplies
Supply
-40°C to +85°C
Package
(Serial Peripheral
1 of 22
Serial Alarm Real-Time Clock
PIN CONFIGURATIONS
INT1
GND
INT0
N.C.
N.C.
V
V
1Hz
CC2
BAT
X1
X2
GND
INT0
INT1
V
V
1Hz
CC2
X1
X2
BAT
TSSOP (4.4mm)
DIP (300 mils)
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10
16
15
14
13
12
11
10
20
19
18
17
16
15
14
13
12
11
9
V
32kHz
V
SDO
SDI
SCLK
CE
SERMODE
CC1
CCIF
V
N.C.
32kHz
V
SDO
SDI
SCLK
CE
SERMODE
DS1306
N.C.
CC1
CCIF

Related parts for DS1306E+

DS1306E+ Summary of contents

Page 1

Rev 12/09 www.maxim-ic.com FEATURES  Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100  96-Byte, Battery-Backed NV RAM for Data Storage  ...

Page 2

... ORDERING INFORMATION PART DS1306 DS1306+ DS1306N DS1306N+ DS1306E DS1306E+ DS1306EN DS1306EN+ DS1306EN/T&R DS1306EN+T&R DS1306E/T&R DS1306E+T&R +Denotes a lead(Pb)-free/RoHS-compliant package T&R = Tape and reel. *An “N” on the top mark indicates an industrial device. PIN DESCRIPTION PIN NAME TSSOP DIP CC2 BAT INT0 8 6 INT1 ...

Page 3

PIN DESCRIPTION (continued) PIN NAME TSSOP DIP 9 7 1Hz 10 8 GND 11 9 SERMODE SCLK 15 12 SDI 16 13 SDO CCIF 18 15 32kHz CC1 4, ...

Page 4

DESCRIPTION The DS1306 serial alarm real-time clock (RTC) provides a full binary coded decimal (BCD) clock calendar that is accessed by a simple serial interface. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of ...

Page 5

RECOMMENDED LAYOUT FOR CRYSTAL Local ground plane (Layer 2) crystal CLOCK ACCURACY The accuracy of the clock is dependent upon the accuracy of the crystal and the accuracy of the match between the capacitive load of the oscillator circuit and ...

Page 6

Figure 2. RTC REGISTERS AND ADDRESS MAP HEX ADDRESS Bit7 Bit6 READ WRITE 00h 80h 0 01h 81h 0 02h 82h 0 03h 83h 0 04h 84h 0 05h 85h 0 06h 86h 07h 87h M 08h 88h M 09h ...

Page 7

Similarly, an alarm is generated every minute when bit 7 of the day, hour, and minute alarm registers is set to a logic 1. When bit 7 of the day, hour, minute, and ...

Page 8

STATUS REGISTER (READ 10H) BIT7 BIT6 0 0 IRQF0 (Interrupt 0 Request Flag) – A logic 1 in the interrupt request flag bit indicates that the current time has matched the Alarm 0 registers. If the AIE0 bit is also ...

Page 9

Table 3. TRICKLE CHARGER RESISTOR AND DIODE SELECT TCS TCS TCS TCS Bit 7 Bit 6 Bit 5 Bit ...

Page 10

Figure 4. POWER-SUPPLY CONFIGURATIONS NOTE: DEVICE IS WRITE-PROTECTED IF V NOTE: DEVICE DOES NOT PROVIDE AUTOMATIC WRITE PROTECTION. CONFIGURATION 1: BACKUP SUPPLY IS NONRECHARGEABLE LITHIUM BATTERY < CCTP CONFIGURATION 2: BACKUP SUPPLY IS A RECHARGEABLE BATTERY OR ...

Page 11

SERIAL INTERFACE The DS1306 offers the flexibility to choose between two serial interface modes. The DS1306 can communicate with the SPI interface or with a standard 3-wire interface. The interface method used is determined by the SERMODE pin. When this ...

Page 12

ADDRESS AND DATA BYTES Address and data bytes are shifted MSB first into the serial data input (SDI) and out of the serial data output (SDO). Any transfer requires the address of the byte to specify a write or read ...

Page 13

Figure 8. SPI MULTIPLE-BYTE BURST TRANSFER READING AND WRITING IN BURST MODE Burst mode is similar to a single-byte read or write, except that CE is kept high and additional SCLK cycles are sent until the end of the burst. ...

Page 14

Figure 9. 3-WIRE SINGLE BYTE TRANSFER CE SCLK I/ SCLK I/ NOTE: IN BURST MODE KEPT HIGH AND ADDITIONAL SCLK CYCLES ARE SENT UNTIL THE END OF THE BURST. *I/O IS SDI ...

Page 15

ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground……………………………………………..-0.5V to +7.0V Storage Temperature Range……………………………………………………………….-55C to +125C Soldering Temperature.……………………………….Refer to the IPC/JEDEC Standard J-STD-020 This is a stress rating only and functional operation of the device at these or ...

Page 16

DC ELECTRICAL CHARACTERISTICS (T = Over the operating range, unless otherwise specified.) A PARAMETER Input Leakage Output Leakage I = 1.5mA OL Logic 0 Output I = 4.0mA -0.4mA OH Logic 1 Output I = -1.0mA OH ...

Page 17

AC ELECTRICAL CHARACTERISTICS (T = Over the operating range, unless otherwise specified.) (Figure 10 and Figure 11) A PARAMETER Data to CLK Setup CLK to Data Hold CLK to Data Delay CLK Low Time CLK High Time CLK Frequency ...

Page 18

Figure 10. TIMING DIAGRAM: 3-WIRE READ DATA TRANSFER SERMODE = GND * I/O IS SDI AND SDO TIED TOGETHER. Figure 11. TIMING DIAGRAM: 3-WIRE WRITE DATA TRANSFER SERMODE = GND * I/O IS SDI AND SDO TIED TOGETHER ...

Page 19

SPI AC ELECTRICAL CHARACTERISTICS (T = Over the operating range, unless otherwise specified.) A PARAMETER Data to CLK Setup CLK to Data Hold CLK to Data Delay CLK Low Time CLK High Time CLK Frequency CLK Rise and Fall CE ...

Page 20

Figure 12. TIMING DIAGRAM: SPI READ DATA TRANSFER SERMODE = SCLK CAN BE EITHER POLARITY, TIMING SHOWN FOR CPOL = 1. Figure 13. TIMING DIAGRAM: SPI WRITE DATA TRANSFER SERMODE = SCLK CAN BE ...

Page 21

NOTES and I are specified with CE set to a logic 0. CC1T CC2T 2) I and I are specified with CC1A CC2A 2.0V 0V Measured ...

Page 22

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time © 2009 Maxim Integrated Products DESCRIPTION ” to Figures 6, 7, 12, and 13 Maxim Is a registered trademark of Maxim Integrated Products, Inc. DS1306 PAGES CHANGED 5 12 ...

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