Optoway

XPB-4840LWG

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Tel: 886-3-5979798

Fax: 886-3-5979737

E-mail: sales@optoway.com.tw http: // www.optoway.com.tw

2008/11/1

V1.0

3

Electrical Characteristics

Parameter

Symbol

Min

Typ

Max

Units

Notes

High-Speed Signal (CML) Interface Specification

Input Data Rate

8.5

Gps

TX Clock Tolerance

±

100

ppm

4

Differential Input Impedance

Rin

100

Ω

Differential Data Input Amplitude

120

820

mVpp

5, Internally AC coupled

Output Data Rate

8.5

Gps

RX Clock Tolerance

±

100

ppm

4

Differential Output Impedance

Rout

100

Ω

Differential Data Output

Amplitude

340

850

mVpp

5, Internally AC coupled

Low-Speed Signal (LVTTL) Interface Specification

Input High Voltage

2.0

Vcc

V

Input Low Voltage

GND

0.8

V

Output High Voltage

2.4

Vcc

V

Output Low Voltage

GND

0.5

V

Reference Clock (LVPECL) Interface Specification

No reference clock

4. Clock tolerance for 8.5Gb/s, 4.25Gb/s, 2.12Gb/s, 1.063Gb/s and 1.25 Gb/s.

5. The differential input and output amplitudes are per XFP MSA mask at points B’ and C’.

Transceiver Timing Characteristics

Parameter

Symbol

Min

Typ

Max

Units

Notes

TX_DIS Assert Time

t_off

10

μs

TX_DIS Negate Time

t_on

2

ms

Time to Initialize

t_init

300

ms

Interrupt Assert Delay

interrupt_on

200

ms

Interrupt Negate Delay

interrupt_off

500

μs

P_Down/PST Assert Delay

P_Down/RST_on

100

μs

P_Down Nagate Delay

P_Down/RST_off

300

ms

Mod_NR Assert Delay

Mod_nr_on

1

ms

Mod_NR Negate Delay

Mod_nr_off

1

ms

Mod_Desel Assert Time

T_Mod_Desel

2

ms

Mod_Desel De-Assert Time

T_Mod_Sel

2

ms

P_Down Reset Time

T_reset

10

μs

RX_LOS Assert Delay

T_Los_on

100

μs

RX_LOS Negate Delay

T_Los_off

100

μs

Serial ID Clock Rate

0

400

kHz