DS1682S/T&R Maxim Integrated Products, DS1682S/T&R Datasheet
DS1682S/T&R
Specifications of DS1682S/T&R
Related parts for DS1682S/T&R
DS1682S/T&R Summary of contents
Page 1
GENERAL DESCRIPTION The DS1682 is an integrated elapsed-time recorder containing a factory-calibrated, compensated RC time base that eliminates the need for an external crystal. Using EEPROM technology to maintain data in the absence of power, the DS1682 requires no ...
Page 2
Figure 1. DS1682 Block Diagram SCL SDA Dallas Semiconductor DS1682 OSCILLATOR AND DIVIDER V CONTROL CC LOGIC AND ALARM EVENT GLITCH EVENT FILTER PIN DESCRIPTION PIN NAME Event Input. The EVENT pin is the input the DS1682 monitors to determine ...
Page 3
OPERATION The block diagram in Figure 1 shows the relationship between the major functional blocks, the serial interface, and the EEPROM memory section of the DS1682. Upon power-up, the DS1682 transfers the contents of the EEPROM into the counters and ...
Page 4
The V holding capacitor value of 30μF is calculated using the maximum EEPROM write current and CC EEPROM write time. This assumes that the V 2.5V on the DS1682 is at least t Figure 4 shows the DS1682 in a ...
Page 5
Table 1. Memory Map ADDR BIT 7 BIT ...
Page 6
EVENT LOGGING When the DS1682 is powered up, the event time and count values recorded in the EEPROM are transferred to the ETC and event counter, and the device waits for an event. When an event triggers the input by ...
Page 7
ALARM The alarm register is a 32-bit register that holds time in quarter-second resolution. When a nonzero number is programmed into the alarm register, the ALARM function is enabled and the DS1682 monitors the values in the ETC for the ...
Page 8
CONFIGURATION REGISTER MSB BIT 7 BIT Note: The configuration register is not stored in EEPROM until an event becomes inactive. RE does not need to be stored in EEPROM to reset the device. Bit 6: Alarm Flag ...
Page 9
USER MEMORY There are 10 bytes of user-programmable, EEPROM memory. Once the write-memory disable flag is set to 1, the memory becomes read-only. User memory is not stored in EEPROM until an event becomes inactive. 2-WIRE SERIAL DATA BUS The ...
Page 10
In this case, the slave must leave the data line high to enable the master to generate the STOP condition. Depending upon the state ...
Page 11
The DS1682 can operate in the following two modes: Slave Receiver Mode (Write Mode): Serial data and clock are received through SDA and SCL. After each byte is received, the receiver transmits an acknowledge bit. START and STOP conditions are ...
Page 12
ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground…….…………………………………………-0.3V to +6V Operating Temperature Range……………………………………………….……………..-40°C to +85°C Storage Temperature Range…………………………………………………..…………...-55°C to +125°C Soldering Temperature………………………………………….See IPC/JEDEC J-STD-020 Specification This is a stress rating only and functional operation of the device ...
Page 13
AC ELECTRICAL CHARACTERISTICS (V = 2.5V to 5.5V -40°C to +85°C PARAMETER EEPROM Endurance EEPROM Write Time EEPROM Transfer to RAM ALARM Output Active- Low Pulse Width ALARM Output Active- High Pulse Width ALARM Input Pulled ...
Page 14
... Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product. No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation. = 4.0V. CC ...