DS1878 Просмотр технического описания (PDF) - Maxim Integrated
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DS1878 Datasheet PDF : 101 Pages
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SFP+ Controller with Digital LDD Interface
DIGITAL THERMOMETER CHARACTERISTICS
(VCC = +2.85V to +5.5V, TA = -40°C to +95°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
Thermometer Error
TERR -40°C to +95°C
MIN TYP MAX UNITS
-3
+3
°C
AC ELECTRICAL CHARACTERISTICS
(VCC = +2.85V to +5.5V, TA = -40°C to +95°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
TXD Enable
tOFF From rising TXD to rising TXDOUT
MIN TYP MAX UNITS
5
μs
Recovery from TXD Disable
tON
From falling TXD to falling TXDOUT
5
μs
Fault Reset Time
(to TXFOUT = 0)
Fault Assert Time
(to TXFOUT = 1)
LOSOUT Assert Time
LOSOUT Deassert Time
tINITR1 From falling TXD
131
On power-up or falling TXD, when VCC LO
ms
tINITR2 alarm is detected (Note 7)
161
tFAULT
After HTXP, LTXP, HBATH, IBIASMAX
(Note 8)
6.4
55
μs
tLOSS_ON LLOS (Notes 8, 9)
tLOSS_OFF HLOS (Notes 8, 10)
6.4
55
μs
6.4
55
μs
CONTROL LOOP AND QUICK-TRIP TIMING CHARACTERISTICS
(VCC = +2.85V to +5.5V, TA = -40°C to +95°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Output-Enable Time Following POA tINIT (Note 7)
20
ms
Binary Search Time
tSEARCH (Note 11)
8
10
BIAS
Samples
3-WIRE DIGITAL INTERFACE SPECIFICATION
(VCC = +2.85V to +5.5V, TA = -40°C to +95°C, timing referenced to VIL(MAX) and VIH(MIN), unless otherwise noted.) (Figure 17)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
SCLOUT Clock Frequency
SCLOUT Duty Cycle
SDAOUT Setup Time
SDAOUT Hold Time
fSCLOUT
t3WDC
tDS
tDH
833
kHz
50
%
100
ns
100
ns
CSEL1OUT, CSEL2OUT Pulse-
Width Low
tCSW
500
ns
CSEL1OUT, CSEL2OUT Leading
Time Before the First SCLOUT
tL
Edge
500
ns
CSEL1OUT, CSEL2OUT Trailing
Time After the Last SCLOUT
tT
Edge
500
ns
SDAOUT, SCLOUT Load
CB3W Total bus capacitance on one line
10
pF
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