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MAX163BCWG maxim 美信芯片 电子元器件中文版规格手册.pdf
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MAX163BCWG maxim 美信芯片 电子元器件中文版规格手册
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DS1683
Total-Elapsed-Time and Event Recorder with Alarm
General Description
The DS1683 is an integrated elapsed-time recorder con-
taining a factory-calibrated, low-temperature-coefficient
RC time base that eliminates the need for an external
crystal. Using EEPROM technology to maintain data in
the absence of power, the DS1683 requires no backup
power source. The DS1683 detects and records the num-
ber of falling edge transitions on the EVENT pin as well
as the total cumulative time that the EVENT pin is held
high. The ALARM pin alerts the user when the total time
accumulated equals or exceeds the user-programmed
alarm value, or when the total number of events equals
or exceeds the user-programmed alarm value. The polar-
ity of the open-drain ALARM pin can be programmed
to either drive low or become high impedance upon an
alarm condition. The DS1683 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
service, repair, or 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 to
Track
Power-on-Time Recorder
Benefits and Features
S Records the Total Time the EVENT Input Has Been
Active High and Number of Events (Falling Edges
of EVENT) That Have Occurred
S 32-Bit, Nonvolatile, Elapsed Time Counter (ETC)
Monitors Event Duration with Quarter Seconds
Resolution and Provides 34 Years of Total Time
Accumulation
S Nonvolatile 16-Bit Event Counter Records the
Number of Falling Edges Seen by the EVENT Pin
S Calibrated, Low-Temperature-Coefficient RC Time
Base
S 16 Bytes of User EEPROM
S Password Protection Scheme (4 Bytes)
S I
2
C-Compatible Interface
S +2.5V to +5.5V Operating Voltage Range
19-6388; Rev 0; 6/12
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maximintegrated.com/DS1683.related.
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
DS1683
Total-Elapsed-Time and Event Recorder with Alarm
2Maxim Integrated
(All voltages referenced to GND.)
Voltage Range on V
CC
, ALARM, SDA, SCL ........-0.5V to +6.0V
Voltage Range on EVENT
........................ -0.5V to (V
CC
+ 0.5V),
not to exceed +6.0V
Continuous Power Dissipation (T
A
= +70NC)
SO (derate 5.9mW/NC above +70NC)
....................... 470.6mW
Maximum Junction Temperature
.....................................+150NC
Operating Temperature Range
.......................... -40NC to +85NC
Programming Temperature Range
....................... 0NC to +70NC
Storage Temperature Range
............................ -55NC to +150NC
Lead Temperature (soldering, 10s)
................................+300NC
Soldering Temperature (reflow)
......................................+260NC
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 opera-
tion 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 OPERATING CONDITIONS
(T
A
= -40NC to +85NC, unless otherwise noted.)
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.5V to 5.5V, T
A
= -40NC to +85NC, unless otherwise noted.)
EVENT TIMING
(V
CC
= 2.5V to 5.5V, T
A
= -40NC to +85NC, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
(Note 1) 2.5 5.5 V
Input Logic 1 (SCL, SDA) V
IH
0.7 x V
CC
V
CC
+ 0.3 V
Input Logic 0 (SCL, SDA) V
IL
-0.3 0.3 x V
CC
V
EVENT Input Trip Point V
ETP
0.3 x
V
CC
0.5 x
V
CC
0.7 x
V
CC
V
EVENT Trip Point Hysteresis V
HYS
1% of V
CC
Power-On Reset V
POR
2.4 V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Leakage I
LI
-1 +1
FA
ALARM Output (I
OL
= 10mA) V
OL
0.8 V
SDA Output (I
OL
= 4mA) V
OL
0.4 V
Active Supply Current I
CCA
(Note 1) 180 300
FA
EEPROM Write Current I
EE
(Note 1) 250 350
FA
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Time Event Minimum t
G
(Note 1) 10 35 70 ms
Time Event Increment t
EI
(Note 1) 237.5 250 262.5 ms
Time Event Max t
EM
(Note 2) 34 Years
CLR ALM to Alarm Set (Note 2) 10 150
Fs
DS1683
Total-Elapsed-Time and Event Recorder with Alarm
3Maxim Integrated
Note 1: All voltages are referenced to ground. Currents entering the IC are specified as positive; currents exiting the IC are specified
as negative.
Note 2: Guaranteed by design.
Note 3: C
B
: Total capacitance of one bus line in pF.
Note 4: EEPROM write time begins after a STOP condition occurs.
Note 5: A decoupling capacitor to supply high instantaneous currents during EEPROM writes is recommended. A typical value is
0.01FF. V
CC
must be maintained above V
CC(MIN)
, including transients, during EEPROM writes.
Note 6: V
CC
must be at or above 2.5V for t
W
after the end of an event to ensure data transfer to the EEPROM.
Note 7: Memory locations to which this specification applies: User Memory, ETC Alarm Limit, Event Counter Alarm Limit,
Configuration, Password Value.
Note 8: Memory locations to which this specification applies: Event Counter register, ETC register.
I
2
C AC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.5V to 5.5V, T
A
= -40NC to +85NC, timing referenced to V
IL(MAX)
and V
IH(MIN)
, unless otherwise noted.) (Figure 7)
NONVOLATILE MEMORY CHARACTERISTICS
(V
CC
= 2.5V to 5.5V, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCL Clock Frequency f
SCL
400 kHz
Bus Free Time Between STOP
and START Conditions
t
BUF
1.3
Fs
Hold Time (Repeated) START
Condition
t
HD:STA
0.6
Fs
Low Period of SCL t
LOW
1.3
Fs
High Period of SCL t
HIGH
0.6
Fs
Data Hold Time t
HD:DAT
0 0.9
Fs
Data Setup Time t
SU:DAT
100 ns
START Setup Time t
SU:STA
0.6
Fs
SDA and SCL Rise Time t
R
(Note 3)
20 +
0.1C
B
300 ns
SDA and SCL Fall Time t
F
(Note 3)
20 +
0.1C
B
300 ns
STOP Setup Time t
SU:STO
0.6
Fs
SDA and SCL Capacitive
Loading
C
B
(Note 3) 400 pF
EEPROM Write Time t
W
(Notes 4, 5, 6) 10 20 ms
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
EEPROM Write Cycles
T
A
= +70NC (Note 7)
50,000 Writes
EEPROM Write Cycles (4 Banks)
T
A
= +70NC (Note 8)
200,000 Writes
DS1683
Total-Elapsed-Time and Event Recorder with Alarm
4Maxim Integrated
Pin Configuration
Pin Description
PIN NAME FUNCTION
1 EVENT
Event Input. The EVENT pin controls when the values in the Elapsed Time Counter (ETC) register and
the Event Counter register are incremented. The EVENT pin also determines when the data in these
registers is stored to EEPROM.
2, 7 N.C. No Connection. These pins are not connected internally.
3 ALARM
Alarm Output. The ALARM pin is an open drain structure, and is set active when an alarm condition is
met. The active state of this pin is controlled by the ALRM POL bit located in the Configuration register.
Once the ALARM pin is active, it will remain active until the alarm condition is cleared and the CLR
ALM bit in the Command register is set.
4 GND Ground
5 SCL
I
2
C Serial-Clock Input. The SCL pin is the serial-clock input for the I
2
C synchronous communications
channel. The SCL pin is an input that requires an external pull-up resistor.
6 SDA
I
2
C Serial-Data Input/Output. The SDA pin is the data input/output signal for the I
2
C synchronous com-
munications channel. The SDA pin is an open-drain I/O, which requires an external pullup resistor.
8 V
CC
+2.5V to +5.5V Input Supply
EVENT
+
N.C.
ALARM
1
2
3
4
8
7
6
5GND
V
CC
N.C.
SDA
SCL
SO
TOP VIEW
DS1683
DS1683
Total-Elapsed-Time and Event Recorder with Alarm
5Maxim Integrated
Detailed Description
The DS1683 is an elapsed-time recorder that tracks the
accumulated time the EVENT pin has been held high as
well as the number of falling edge transitions seen by the
EVENT pin. The main application is to track the accumu-
lated on-time and number of power cycles of a device or
system. Programmable alarm limits for both the accumu-
lated on-time and number of falling edges of the EVENT
pin are available so that the user can be alerted when
these conditions are met. The accumulated elapsed
time that the EVENT pin has been held high is stored
in the 4-byte Elapsed Time Counter (ETC) register. The
number of times the EVENT pin sees a falling transition is
stored in the 2-byte Event Counter register. The DS1683
includes password protection to prevent tampering with
accumulated values, alarm limits, configuration settings,
and user memory values.
The ETC, ETC Alarm Limit, Event Counter, Event Counter
Alarm Limit, Configuration, Password, and User Memory
values are stored in shadowed EEPROM. On power-up,
the values in the ETC and Event Counter are loaded into
SRAM locations. When the state of the EVENT pin causes
changes to the accumulated time and number of events,
it is these SRAM registers that are incremented.
Block Diagram
ELAPSED TIME COUNTER (ETC)
(REGISTERS 0Ah−0Dh)
GLITCH
FILTER
EVENT
ALARM
SDA
SCL
ALARM
LATCH
ETC
ALARM
ENABLE
ETC ALARM LIMIT
(REGISTERS 12h−15h)
OSCILLATOR
EVENT
ALARM
ENABLE
V
CC
V
CC
GND
I
2
C
INTERFACE
EVENT ALARM LIMIT
(REGISTERS 10h−11h)
EVENT COUNTER
(REGISTERS 08h−09h)
STATUS REGISTER
(REGISTER 01h)
CONFIGURATION REGISTER
(REGISTER 16h)
USER EEPROM
(REGISTERS 20h−2Fh)
COMMAND REGISTER
(REGISTER 00h)
PASSWORD PROTECTION
(REGISTERS 02h−05h)
(REGISTERS 1Ah−1Dh)
ALARM
POLARITY
DS1683
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