DS1864 datasheet(5/72 Pages) DALLAS

5 / 72 page

SFP Laser Controller and

Diagnostic IC

_____________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

TIMING FOR SOFT CONTROL AND STATUS FUNCTIONS

TX-D Assert Time

tOFF

Time from TX-D set until DACs fall below

10% of nominal (Notes 13, 17)

TX-D Deassert time

tON

Time from TX-D cleared until DACs rise

above 90% of nominal (Notes 13, 17)

Time to Initialize, Including

Reset of TX-F

tINIT

Time from power-on or negation of TX-F

using TX-D;

serial communication possible

200

TX-F Assert Time

tFAULT

Time from fault to TX-F set (Note 17)

RX-LOS Assert Time

tLOS_ON

Time from occurrence of loss of signal to

RX-LOS set

RX-LOS Deassert Time

tLOS_OFF

Time from occurrence of presence of signal

to RX-LOS cleared

Rate-Select Change Time

tRATE_SEL

Time from change of state of rate-select bit

to rate-select output (RSELOUT) pin change

I2C AC ELECTRICAL CHARACTERISTICS

(VCC = 2.97V to 5.5V; TA = -40°C to +95°C, timing referenced to VIL(MAX) and VIH(MIN).) (See Figure 19)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SCL Clock Frequency

fSCL

(Note 14)

400

kHz

Bus Free Time Between Stop and

Start Conditions

tBUF

1.3

µs

Hold Time (Repeated) Start

Condition

tHD:STA

0.6

µs

Low Period of SCL

tLOW

1.3

µs

High Period of SCL

tHIGH

0.6

µs

Data Hold Time

tHD:DAT

0.9

µs

Data Setup Time

tSU:DAT

100

Start Setup Time

tSU:STA

0.6

µs

SDA and SCL Rise Time

(Note 15)

20 +

0.1CB

300

SDA and SCL Fall Time

(Note 15)

20 +

0.1CB

300

Stop Setup Time

tSU:STO

0.6

µs

SDA and SCL Capacitive

(Note 15)

400

EEPROM Write Time

(Note 16)

DS1864 Datasheet(PDF) 5 Page - Dallas Semiconductor

DS1864 Datasheet(HTML) 5 Page - Dallas Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72

Datasheet Download

Link URL