DS1340Z-18

DS1340Z-18 Datasheet

DS1340

Part	Datasheet
DS1340Z-18	DS1340Z-18 (pdf)

Related Parts	Information
DS1340Z-3	DS1340Z-3
DS1340Z-33	DS1340Z-33
DS1340Z-33/T&R	DS1340Z-33/T&R

PDF Datasheet Preview
I2C RTC with Trickle Charger DS1340 The DS1340 is a real-time clock RTC /calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration. The device additionally provides trickle-charge capability on the VBACKUP pin, a lower timekeeping voltage, and an oscillator STOP flag. Block access of the register map is identical to the ST device. Two additional registers, which are accessed individually, are required for the trickle charger and flag. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. A built-in power-sense circuit detects power failures and automatically switches to the backup supply. Reads and writes are inhibited while the clock continues to run. The device is programmed serially through an I2C* bidirectional bus. Portable Instruments Point-of-Sale Equipment Medical Equipment Telecommunications Typical Operating Circuit CRYSTAL VCC RPU X1 X2 6 SCL VCC 7 FT/OUT RPU = tR / CB 5 SDA DS1340 3 VBACKUP GND 4 *Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips. Enhanced Second Source for the ST M41T00 Available in a Surface-Mount Package with an Integrated Crystal DS1340C Fast 400kHz I2C Interface Software Clock Calibration RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year Automatic Power-Fail Detect and Switch Circuitry Trickle-Charge Capability Low Timekeeping Voltage Down to 1.3V Three Operating Voltage Ranges 1.8V, 3V, and 3.3V Oscillator Stop Flag Available in 8-Pin µSOP or SO Packages Underwriters Laboratory UL Recognized Ordering Information PART DS1340Z-18 DS1340Z-3 DS1340Z-33 DS1340U-18 DS1340U-3 DS1340U-33 DS1340C-18 DS1340C-3 DS1340C-33 DS1340Z-18+ TEMP RANGE PIN-PACKAGE TOP MARK† -40°C to +85°C 8 SO 0.150in D1340-18 -40°C to +85°C 8 SO 0.150in DS1340-3 -40°C to +85°C 8 SO 0.150in D1340-33 -40°C to +85°C 8 µSOP 1340A1-18 -40°C to +85°C 8 µSOP 1340A1-3 -40°C to +85°C 8 µSOP 1340A1-33 -40°C to +85°C 16 SO 1340C-18 -40°C to +85°C 16 SO 1340C-3 -40°C to +85°C 16 SO 1340C-33 -40°C to +85°C 8 SO 0.150in D1340-18 DS1340Z-3+ -40°C to +85°C 8 SO 0.150in DS1340Z-33+ -40°C to +85°C 8 SO 0.150in DS1340U-18+ -40°C to +85°C 8 µSOP DS1340U-3+ -40°C to +85°C 8 µSOP DS1340U-33+ -40°C to +85°C 8 µSOP DS1340-3 D1340-33 1340A1-18 1340A1-3 1340A1-33 DS1340C-18# -40°C to +85°C 16 SO DS1340C-3# -40°C to +85°C 16 SO 1340C-18 1340C-3 DS1340C-33# -40°C to +85°C 16 SO 1340C-33 + Denotes a lead-free/RoHS-compliant device. # Denotes a RoHS-compliant device that may include lead that is exempt under RoHS requirements. The lead finish is JESD97 category e3, and is compatible with both lead-based and leadfree soldering processes. † A "+" anywhere on the top mark denotes a lead-free device. A "#" denotes a RoHS-compliant device. Pin Configurations appear at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at DS1340 I2C RTC with Trickle Charger ABSOLUTE MAXIMUM RATINGS Voltage Range on VCC Pin Relative to Ground .....-0.3V to +6.0V Voltage Range on SDA, SCL, and FT/OUT Relative to VCC + 0.3V Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-55°C to +125°C Soldering Temperature Range............................See IPC/JEDEC J-STD-020 Specification Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. AC ELECTRICAL CHARACTERISTICS VCC = VCC MIN to VCC MAX, TA = -40°C to +85°C, unless otherwise noted. Note 1, Figure 1 PARAMETER SCL Clock Frequency Bus Free Time Between STOP and START Conditions Hold Time Repeated START Condition Note 2 Low Period of SCL Clock High Period of SCL Clock Data Hold Time Notes 3, 4 Data Setup Time Note 5 START Setup Time Rise Time of SDA and SCL Signals Note 6 Fall Time of SDA and SCL Signals Note 6 Setup Time for STOP Condition Capacitive Load for Each Bus Line I/O Capacitance SCL, SDA Pulse Width of Spikes that Must be Suppressed by the Input Filter Oscillator Stop Flag OSF Delay SYMBOL fSCL tBUF tHD:STA tLOW tHIGH tHD:DAT tSU:DAT tSU:STA tR tF tSU:STO CB CI/O tSP tOSF CONDITIONS Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Note 6 Fast mode Note 7 MIN TYP 0 100 0 250 100 20 + 0.1CB 20 + 0.1CB 20 + 0.1CB 20 + 0.1CB MAX 100 400 UNITS kHz µs 1000 ns 300 ns 300 I2C RTC with Trickle Charger DS1340 RECOMMENDED DC OPERATING CONDITIONS VCC = VCC MIN to VCC MAX, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V, TA = +25°C, unless otherwise noted. Note 1 PARAMETER Supply Voltage Note 8 Input Logic 1 SDA, SCL Input Logic 0 SDA, SCL Supply Voltage, Pullup FT/OUT, SDA, SCL , VCC = 0V Backup Supply Voltage Note 8

PDF Datasheet Preview

I2C RTC with Trickle Charger

DS1340

The DS1340 is a real-time clock RTC /calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration. The device additionally provides trickle-charge capability on the VBACKUP pin, a lower timekeeping voltage, and an oscillator STOP flag. Block access of the register map is identical to the ST device. Two additional registers, which are accessed individually, are required for the trickle charger and flag. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. A built-in power-sense circuit detects power failures and automatically switches to the backup supply. Reads and writes are inhibited while the clock continues to run. The device is programmed serially through an I2C* bidirectional bus.

Portable Instruments Point-of-Sale Equipment Medical Equipment Telecommunications

Typical Operating Circuit

CRYSTAL

VCC RPU

X1 X2 6 SCL

VCC 7

FT/OUT

RPU = tR / CB
5 SDA

DS1340
3 VBACKUP GND 4
*Purchase of I2C components from Maxim Integrated Products,

Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.

Enhanced Second Source for the ST M41T00 Available in a Surface-Mount Package with an

Integrated Crystal DS1340C Fast 400kHz I2C Interface Software Clock Calibration RTC Counts Seconds, Minutes, Hours, Day, Date,

Month, and Year Automatic Power-Fail Detect and Switch Circuitry Trickle-Charge Capability Low Timekeeping Voltage Down to 1.3V Three Operating Voltage Ranges 1.8V, 3V, and 3.3V Oscillator Stop Flag Available in 8-Pin µSOP or SO Packages Underwriters Laboratory UL Recognized
Ordering Information

PART

DS1340Z-18 DS1340Z-3 DS1340Z-33 DS1340U-18 DS1340U-3 DS1340U-33 DS1340C-18 DS1340C-3 DS1340C-33 DS1340Z-18+

TEMP RANGE

PIN-PACKAGE

TOP MARK†
-40°C to +85°C 8 SO 0.150in D1340-18
-40°C to +85°C 8 SO 0.150in DS1340-3
-40°C to +85°C 8 SO 0.150in D1340-33
-40°C to +85°C 8 µSOP
1340A1-18
-40°C to +85°C 8 µSOP
1340A1-3
-40°C to +85°C 8 µSOP
1340A1-33
-40°C to +85°C 16 SO
1340C-18
-40°C to +85°C 16 SO
1340C-3
-40°C to +85°C 16 SO
1340C-33
-40°C to +85°C 8 SO 0.150in D1340-18

DS1340Z-3+ -40°C to +85°C 8 SO 0.150in DS1340Z-33+ -40°C to +85°C 8 SO 0.150in DS1340U-18+ -40°C to +85°C 8 µSOP DS1340U-3+ -40°C to +85°C 8 µSOP DS1340U-33+ -40°C to +85°C 8 µSOP

DS1340-3 D1340-33 1340A1-18 1340A1-3 1340A1-33

DS1340C-18# -40°C to +85°C 16 SO DS1340C-3# -40°C to +85°C 16 SO
1340C-18 1340C-3

DS1340C-33# -40°C to +85°C 16 SO
1340C-33
+ Denotes a lead-free/RoHS-compliant device.
# Denotes a RoHS-compliant device that may include lead that is exempt under RoHS requirements. The lead finish is JESD97 category e3, and is compatible with both lead-based and leadfree soldering processes.
† A "+" anywhere on the top mark denotes a lead-free device. A "#" denotes a RoHS-compliant device.

Pin Configurations appear at end of data sheet.

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at

DS1340

I2C RTC with Trickle Charger

ABSOLUTE MAXIMUM RATINGS

Voltage Range on VCC Pin Relative to Ground .....-0.3V to +6.0V Voltage Range on SDA, SCL, and FT/OUT

Relative to VCC + 0.3V Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-55°C to +125°C Soldering Temperature Range............................See IPC/JEDEC

J-STD-020 Specification

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

AC ELECTRICAL CHARACTERISTICS

VCC = VCC MIN to VCC MAX, TA = -40°C to +85°C, unless otherwise noted. Note 1, Figure 1

PARAMETER SCL Clock Frequency

Bus Free Time Between STOP and START Conditions Hold Time Repeated START Condition Note 2

Low Period of SCL Clock

High Period of SCL Clock

Data Hold Time Notes 3, 4

Data Setup Time Note 5

START Setup Time

Rise Time of SDA and SCL Signals Note 6 Fall Time of SDA and SCL Signals Note 6

Setup Time for STOP Condition

Capacitive Load for Each Bus Line I/O Capacitance SCL, SDA Pulse Width of Spikes that Must be Suppressed by the Input Filter Oscillator Stop Flag OSF Delay

SYMBOL fSCL tBUF
tHD:STA tLOW tHIGH
tHD:DAT tSU:DAT tSU:STA
tR tF tSU:STO CB CI/O tSP tOSF

CONDITIONS Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode Standard mode Fast mode

Note 6

Fast mode

Note 7

MIN TYP 0
100 0 250 100 20 + 0.1CB 20 + 0.1CB 20 + 0.1CB 20 + 0.1CB

MAX 100 400

UNITS kHz
µs 1000
ns 300
ns 300

I2C RTC with Trickle Charger

DS1340

RECOMMENDED DC OPERATING CONDITIONS

VCC = VCC MIN to VCC MAX, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V, TA = +25°C, unless otherwise noted. Note 1

PARAMETER Supply Voltage Note 8 Input Logic 1 SDA, SCL Input Logic 0 SDA, SCL Supply Voltage, Pullup FT/OUT, SDA, SCL , VCC = 0V Backup Supply Voltage Note 8

More datasheets: 1731120083 | 1731120154 | 58C1200 | ICS954127BGLFT | 1731120061 | 1731120060 | 1731120062 | DS1340Z-3 | DS1340Z-33 | DS1340Z-33/T&R

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Datasheet ID: DS1340Z-18 647156