DS1682S/T&R-DS1682S+-DS1682S+T&R Fast Delivery |IC PHOENIX CO.,LIMITED

DS1682S+T&R ,Total-Elapsed-Time Recorder with AlarmElectrical Characteristics(V = 2.5V to 5.5V, T = -40°C to +85°C, unless otherwise noted.)CC APARAME ..
DS1685-3 ,3V/5V Real-Time Clocksfeatures including a silicon serial number, power-on/off control circuitry, 242 bytes of user NV SR ..
DS1685-5 ,3V/5V Real-Time ClocksFeatures Such as: Y2K Compliant RAM Clear Input +3V or +5V Operation Century Register ..
DS1685E-3 ,3V/5V Real-Time Clocks DS1685/DS1687 3V/5V Real-Time Clocks
DS1685E-3 ,3V/5V Real-Time Clocks DS1685/DS1687 3V/5V Real-Time Clocks
DS1685E-3+ ,3V/5V Real-Time Clockfeatures described above. An external crystal and batteryare the only components required to mainta ..
DV74AC244 , Octal buffer/Line Driver with 3-state Outputs
DVIULC6-2P6 ,Ultra Low capacitance 2 lines ESD protectionApplicationsBenefits■ DVI ports up to 1.65 Gb/s■ ESD standards compliance guaranteed at ■ IEEE 1394 ..
DVIULC6-4SC6 ,Ultralow capacitance ESD protectionFeatures■ 4-line ESD protection (IEC 61000-4-2)■ Protects V when applicableBUS■ Ultralow capacitanc ..
DW01 , One Cell Lithium-ion/Polymer Battery Protection IC
DW01 , One Cell Lithium-ion/Polymer Battery Protection IC
DW01 , One Cell Lithium-ion/Polymer Battery Protection IC

DS1682S/T&R-DS1682S+-DS1682S+T&R
Total-Elapsed-Time Recorder with Alarm
General Description
The DS1682 is an integrated elapsed-time recorder con-
taining a factory-calibrated, temperature-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 backup
power source. The DS1682 detects and records the num-
ber of events on the EVENT pin and the total cumulative
event time since the DS1682 was last reset to 0. The
ALARM pin alerts the user when the total time accu-
mulated equals the user-programmed alarm value. The
polarity of the open-drain ALARM pin can be programmed
to either drive low or to become high impedance upon an
alarm condition. The DS1682 is ideal for applications that
monitor the total amount of time that a device has been
in operation and/or the number of uses since inception of
service, repair, or the last calibration.
Applications●High-Temp, Rugged, Industrial Applications Where
Vibration or Shock Could Damage a Quartz Crystal●Any System Where Time-of-Use is Important
(Warranty Tracking)
Beneits and Features●Records the Total Time That the Event Input Has
Been Active and the Number of Events That Have
Occurred●32-Bit, Nonvolatile, Elapsed Time Counter (ETC)
Monitors Event Duration with Quarter-Second
Resolution and Provides 34 Years of Total Time
Accumulation●Programmable Elapsed Time ALARM Output●Nonvolatile, 17-Bit Event Counter Records the Total
Number of Times an Event has Occurred●Calibrated, Temperature-Compensated RC Time
Base Accurate to 2% Typical●10 Bytes of EEPROM User Memory●Write Disable Function to Prevent the Memory from
Being Changed or Erased●2-Wire Serial Communication●Wide 2.5V to 5.5V Power-Supply Range●Useful in Time-of-Use Warranty, Calibration, Repair,
and Maintenance Applications
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/DS1682.related.
Figure 1. Block Diagram
SERIAL INTERFACE
EVENT COUNTER
CONTROL
LOGIC AND
EVENT
GLITCH
FILTER
OSCILLATOR
AND DIVIDER
SCL
SDA
VCC
ALARM
EVENT
DS1682
ELAPSED TIME
COUNTER (ETC)
USER, CONTROL, AND
CONFIGURATION
REGISTERS
ALARM REGS
AND
COMPARE LOGIC
EEPROM ARRAY
DS1682Total-Elapsed-Time Recorder
with Alarm
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
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
(TA = -40°C to +85°C, unless otherwise noted.)
(VCC = 2.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Power-Supply VoltageVCC2.55.5V
Input Trip PointVETP0.3 x
VCC
0.5 x
VCC
0.7 x
VCCV
Event Trip-Point HysteresisVHYS1% of
VCC%
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input LeakageILI-1+1µA
ALARM Output (IOL = 10mA)VOL0.8V
SDA Output (IOL = 4mA)VOL0.8V
Active Supply Current
(Event Active)ICCA(Note 1)120300µA
Standby Current
(Event Active) (Note 1)ICCSVCC = 5.5V615µAVCC = 3.0V24
EEPROM Write CurrentIEE(Note 1)150300µA
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Time Event Minimum tG(Note 1)103570ms
Time Event StarttES(Note 1)112125137ms
Time Event Increment tEI(Note 1)237.5250262.5ms
Time Event MaxtEM34Years
DS1682Total-Elapsed-Time Recorder
with Alarm
Absolute Maximum Ratings
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.
Recommended DC Operating Conditions
DC Electrical Characteristics
Event Timing
(VCC = 2.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
EEPROM EnduranceEE(Note 2)50kwrites
EEPROM Write TimetEW(Notes 1, 3, 4)150300ms
EEPROM Transfer to RAMtER(Notes 1, 5)1ms
ALARM Output Active-Low Pulse
WidthtSL(Note 1)62.5ms
ALARM Output Active-High Pulse
WidthtSH(Note 1)437.5ms
ALARM Input Pulled Low
and Released Pulse WidthtSPL(Note 1)500ms
SCL Clock FrequencyfSCLFast mode400kHzStandard mode100
Bus Free Time Between a
STOP and START ConditiontBUFFast mode1.3µsStandard mode4.7
Hold Time (Repeated)
START Condition (Note 6)tHD:STA
Fast mode0.6Standard mode4.0
Low Period of SCLtLOWFast mode1.3µs
Standard mode4.7
High Period of SCLtHIGHFast mode0.6µsStandard mode4.0
Setup Time for a Repeated
STARTtSU:STAFast mode0.6µsStandard mode4.0
Data Hold Time (Notes 7, 8)tHD:DATFast mode0µsStandard mode0
Data Setup Time (Note 9)tSU:DAT
Fast mode100Standard mode250
Rise Time of SDA and SCL
Signals (Note 10)tR
Fast mode20 +
0.1CB300
Standard mode20 +
0.1CB1000
Fall Time of SDA and SCL
Signals (Note 10)tF
Fast mode20 +
0.1CB300
Standard mode20 +
0.1CB300
Setup Time for STOPtSU:STOFast mode0.6µsStandard mode4.0
Input CapacitanceCI/O(Note 1)10pF
Capacitive Load for Each
Bus LineCB(Note 10)400pF
DS1682Total-Elapsed-Time Recorder
with Alarm
AC Electrical Characteristics
(VCC = 2.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.)
Note 1: Typical values are at TA = +25°C, VCC = 4.0V.
Note 2: The elapsed time and event counters are backed by three EEPROM arrays, which are used sequentially, allowing up to 3 x
EE. The configuration register, alarm trip-point register, and user memory use a single array, limiting them to one EE.
Note 3: A decoupling capacitor to supply high instantaneous currents during EEPROM writes is recommended. A typical value is 0.01μF. VCC must be maintained above VCC minimum, including transients, during EEPROM writes.
Note 4: VCC must be at or above 2.5V for tEW after the end of an event to ensure data transfer to the EEPROM.
Note 5: Reading data while the contents of EEPROM are transferred to RAM results in incorrect reads.
Note 6: After this period, the first clock pulse is generated.
Note 7: A device must internally provide a hold time of at least 300ns for the SDA signal (referred to the VIH(MIN) of the SCL signal)
to bridge the undefined region of the falling edge of SCL.
Note 8: The maximum tHD:DAT has only to be met if the device does not stretch the low period (tLOW) of the SCL signal.
Note 9: A fast-mode device can be used in a standard-mode system, but the requirement tSU:DAT ≥ 250ns must be met. This is
automatically the case if the device does not stretch the tLOW. If such a device does stretch tLOW, it must output the next
data bit to the SDA line tR(MAX) + tSU:DAT = 1000 + 250 = 1250ns before the SCL line is released.
Note 10: CB—Total capacitance of one bus line in pF.
SCL
NOTE: TIMING IS REFERENCED TO VIL(MAX) AND VIH(MIN).
SDA
STOPSTARTREPEATED
START
tBUF
tHD:STA
tHD:DATtSU:DAT
tSU:STO
tHD:STAtSP
tSU:STAtHIGH
tLOW
DS1682Total-Elapsed-Time Recorder
with Alarm
Timing Diagram
PINNAMEFUNCTIONEVENT
Event Input. The EVENT pin is the input the DS1682 monitors to determine when an event occurs. When
the pin is pulled high, the contents of the EEPROM are transferred to the ETC and the oscillator starts.
The ETC begins to count in quarter-second increments. When the EVENT pin falls to logic 0, the event
counter increments, and the event counter, ETC, and user-memory data are stored in the EEPROM array.
When the EVENT pin changes states, the 2-wire bus is unavailable for communications for tEW (falling)
and tER (rising). The EVENT input is also deglitched (tG) to prevent short noise spikes from triggering an
event.
2, 7N.C.No Connection. These pins are not connected internally.ALARM
Active-Low Alarm Output. The DS1682 monitors the values in the ETC for the programmed value in the alarm register. When the ETC matches the alarm value, the alarm lag (AF) is set. Once set, the alarm lag cannot be reset. See the operating descriptions for the AOS and AP bits for details about the
operation of the ALARM pin.GNDGroundSCL2-Wire Serial-Clock Input. The SCL pin is the serial-clock input for the 2-wire synchronous
communications channel. The SCL pin is an input that requires an external pullup resistor.SDA2-Wire Input/Output. The SDA pin is the data input/output signal for the 2-wire synchronous
communications channel. The SDA pin is an open-drain I/O, which requires an external pullup resistor.VCC+2.5V to +5.5V Input Supply
EVENT+
N.C.
ALARMGND
VCC
N.C.
SDA
SCL
(150 mils)
TOP VIEW
DS1682
DS1682Total-Elapsed-Time Recorder
with Alarm
Pin Description
Pin Coniguration
Figure 2. Total Run Time
DS1682
VCCEVENT
TRIGGER SWITCH
LED
SCL
PUSHBUTTON
SWITCH
ALARM
SDAGND
0.01µF
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 memory registers where
the data can be read and written through the serial inter-
face. The content of the counters and memory registers
are written into the EEPROM memory when the EVENT
pin transitions from a logic-high to a logic-low.
The DS1682 uses a calibrated, temperature-compensat-
ed RC time base to increment an ETC while an event
is active. When the event becomes active, the contents
of the nonvolatile EEPROM are transferred to the ETC
and event counter and the oscillator starts. As the event
continues, the ETC is incremented in quarter-second
increments. When the event becomes inactive, the event
counter is incremented and the contents of the ETC and
event counter are written to the nonvolatile EEPROM.
The ALARM output can be used to indicate when the ETC
has matched the value in the alarm register.
The DS1682 can be configured to prevent clearing the
alarm and the elapsed time and event counters.The user
memory can be separately write protected.
User-modified data is not stored in EEPROM until an
event becomes inactive.
Figure 2 shows the DS1682 measuring total run time and
operating from a battery with the alarm tied to an LED and
a pushbutton switch to trigger the alarm output.
Figure 3 shows the DS1682 in a total time-of-use applica-
tion where power may be removed at the same time as
the end of the event. The VCC slew rate at power-down is
fast with respect to tEW. A capacitor maintains VCC on the
DS1682 above 2.5V until the EEPROM write completes. A
Schottky diode blocks current from the capacitor to other
devices connected to VCC.
The VCC holding capacitor value of 30μF is calculated
using the maximum EEPROM write current and EEPROM
write time. This assumes that the VCC slew rate allows
time from EVENT trip point to VCC at 2.5V on the DS1682
is at least tEW.
Figure 4 shows the DS1682 in a total time-of-use applica-
tion with power that can be removed at the sametime as
the end of the event. In this application, the VCC slew rate
at power-down is slow with respect to tEW. The external
reset IC (DS1816) ends the event as VCC begins to drop.
VCC must remain above 2.5V until the end of tEW.
Figure 3. Total Time-of-Use Application with Fast VCC Slew Rate
DS1682
VCCEVENT
LED
SCLALARM
SDAGND
0.01µF30µF typ
VCC
Figure 4. Total Time-of-Use Application with Slow VCC Slew Rate
DS1682
VCCALARM
LED
SCLEVENT
SDAGND
0.01µF
RPU = tR/CBUS
RPURPU
VCC
VCC
DS1816
DS1682Total-Elapsed-Time Recorder
with Alarm
Table 1. Memory Map
ADDRBIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0FUNCTION
00h0AFWDFWMDFAOSREAPECMSBConiguration
Register
01hLow Byte
Low-Middle Byte
High-Middle Byte
High Byte
Alarm Register02h
03h
04h
05hLow Byte
Low-Middle Byte
High-Middle Byte
High Byte
Elapsed Time
Counter (ETC)
06h
07h
08h
09hLow Byte
High ByteEvent Counter0Ah
0BhByte 1
User Memory
0ChByte 2
0DhByte 3
0EhByte 4
0FhByte 5
10hByte 6
11hByte 7
12hByte 8
13hByte 9
14hByte 10
15h
Not Used (reads 00h)Not Used
16h
17h
18h
19h
1Ah
1Bh
1Ch
1DhReset CommandReset Command
1EhWrite DisableWrite Disable
1FhWrite Memory DisableMemory Disable
DS1682Total-Elapsed-Time Recorder
with Alarm

Partno	Mfg	Dc	Qty	Available	Descript
DS1682S/T&R \|DS1682ST&R	DALLAS ?	N/a	2951	avai	Total-Elapsed-Time Recorder with Alarm
DS1682S+	DALLAS	N/a	1063	avai	Total-Elapsed-Time Recorder with Alarm
DS1682S+T&R	DALLAS ?	N/a	5285	avai	Total-Elapsed-Time Recorder with Alarm