Instruction Manual

_______________________________________________________________________________________ 7
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
NC
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TXD_ Enable t
OFF
From ↑ TXD_
5
Fs
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
Fs
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
Fs
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
Fs
Clock Pulse-Width High t
HIGH
0.6
Fs
Bus Free Time Between STOP and
START Condition
t
BUF
1.3
Fs
START Hold Time t
HD:STA
0.6
Fs
START Setup Time t
SU:STA
0.6
Fs
Data Out Hold Time t
HD:DAT
0 0.9
Fs
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
Fs
Capacitive Load for Each Bus Line C
B
400 pF
EEPROM Write Time t
WR
(Note 8) 20 ms