DS1864 datasheet(4/72 Pages) DALLAS

4 / 72 page

SFP Laser Controller and

Diagnostic IC

_____________________________________________________________________

DIGITAL THERMOMETER CHARACTERISTICS

(VCC = 2.97V to 5.5V, TA = -40°C to +95°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Thermometer Error

TERR

-40°C to +95°C

(Notes 10, 17)

-3

°C

Dual range disabled

Update Rate

tframe

Dual range enabled

AC ELECTRICAL CHARACTERISTICS

(VCC = 2.97V to 5.5V, TA = -40°C to +95°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SHUTDOWN AND FAULTS (SEE FAULT AND SHUTDOWN TIMING DIAGRAMS FIGURES 1 TO 10), FOR FAST ALARMS AND

SFP MANAGEMENT

TX-D (to DACs Off-State

Currents)

tOFF

Figure 4

From

TX-D

(Notes 11, 17)

5µs

Recovery from Normal Disable

(to DACs Set Values)

tON

Figure 4

From

TX-D

(Notes 12, 17)

0.8

Recovery After Power-Up (to

DACs Set Values)

tINIT_DACs

Figure 9

From

VCC = 2.97V

(Notes 11, 17)

100

Shutdown Response Time (to

DACs Off-State Current)

tFAULT

Figure 5

IBMD > TripHi

or IBIAS > Trip

IBMD < TripLo

(Notes 11, 17)

µs

Recovery from Safety Fault

Shutdown (to DACs Set Values)

tINITSF

Figures 6

and 10

From

TX-D

(Notes 11, 17)

Fault Reset Time (to TX-F = 0)

tINITR1

Figure 2

From

TX-D

100

200

Fault Reset Time (to TX-F = 0)

tINITR2

Figures 1,

2, 3, and 6

From

VCC = 2.97V

100

200

Fault Assert Time (to TX-F = 1)

tFAULT

Figure 5

IBMD > TripHi

or IBIAS > Trip

IBMD < TripLo

(Note 11)

µs

LOS Assert Time

tLOSS_ON

Figure 8

RSSI < Trip

(Note 12)

µs

LOS Deassert Time

tLOSS_OFF

Figure 8

RSSI > Trip

(Note 12)

µs

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