Datasheet

7Maxim Integrated
SFP Controller for Dual Rx Interface
DS1877
ANALOG QUICK-TRIP 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.)
DIGITAL THERMOMETER 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, unless otherwise noted. Timing is referenced to V
IL(MAX) and
V
IH(MIN)
.) (Figure 12)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RSSI Full-Scale Voltage 1.25 V
Input Resistance 35 50 65
kW
Resolution 8 Bits
Error
T
A
= +25°C ±2
%FS
Integral Nonlinearity -1 +1 LSB
Differential Nonlinearity -1 +1 LSB
Temperature Drift -2 +2 %FS
Offset -5 +10 mV
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output-Enable Time Following POA t
INIT
(Note 5) 20 ms
Sample Time per Quick-Trip
Comparison
t
REP
12.8
Fs
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Thermometer Error T
ERR
-40NC to +95NC
-3 +3
NC
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCL Clock Frequency f
SCL
(Note 8) 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 9)
20 +
0.1C
B
300 ns
Fall Time of Both SDA and SCL
Signals
t
F
(Note 9)
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 10) 20 ms