Rainbow Electronics DS1876 - Manual (Page 7)

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DS1876
SFP Controller with Dual LDD Interface
DIGITAL THERMOMETER CHARACTERISTICS
(V CC = +2.85V to +3.9V, T A = -40NC to +95NC, unless otherwise noted.)
AC ELECTRICAL CHARACTERISTICS
(V CC = +2.85V to +3.9V, T A = -40NC to +95NC, unless otherwise noted.)
QUICK-TRIP TIMING CHARACTERISTICS
(V CC = +2.85V to +3.9V, T A = -40NC to +95NC, unless otherwise noted.)
I 2 C AC ELECTRICAL CHARACTERISTICS
(V CC = +2.85V to +3.9V, T A = -40NC to +95NC, timing referenced to V IL(MAX) and V IH(MIN) , unless otherwise noted. See the I 2 C
Communication section.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Thermometer Error T ERR -40NC to +95NC -3 +3 N C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TXD_ Enable t OFF From ↑ TXD_ 5 F s
Recovery from TXD_ Disable
(Figure 2)
t ON From ↓ TXD_ 1 ms
Fault Reset Time (to TXFOUT = 0)
t INITR1 From ↓ TXD_ 131
ms
t INITR2
On power-up or ↓ TXD_, when VCC LO
alarm is detected (Note 5)
161
Fault Assert Time (to TXFOUT = 1) t FAULT After HTXP_, LTXP_, HBATH_ 1.6 10.5 F s
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output-Enable Time Following POA t INIT 20 ms
Sample Time per Quick-Trip
Comparison
t REP 1.6
F
s
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCL Clock Frequency f SCL (Note 6) 0 400 kHz
Clock Pulse-Width Low t LOW 1.3 F s
Clock Pulse-Width High t HIGH 0.6
F
s
Bus Free Time Between STOP and
START Condition
t BUF 1.3 F s
START Hold Time t HD:STA 0.6 F s
START Setup Time t SU:STA 0.6 F s
Data Out Hold Time t HD:DAT 0 0.9 F s
Data In Setup Time t SU:DAT 100 ns
Rise Time of Both SDA and SCL
Signals
t R (Note 7)
20 +
0.1C B
300 ns
Fall Time of Both SDA and SCL
Signals
t F (Note 7)
20 +
0.1C B
300 ns
STOP Setup Time t SU:STO 0.6
F
s
Capacitive Load for Each Bus Line C
B
400 pF
EEPROM Write Time t WR (Note 8) 20 ms