si5540 Silicon Laboratories, si5540 Datasheet - Page 16

Manufacturer Part Number

si5540

Description

Siphy Oc-192/stm-64 Transmitter - Silicon Laboratories

Manufacturer

Silicon Laboratories

Datasheet

1.SI5540.pdf (20 pages)

Si 5540

Pin Number(s)

D4–7, E4–7,

F4–7, G4–7,

TXMSBSEL

TXSQLCH

Pin Name

VDD33

VDD

VDD33

VDD

I/O

Preliminary Rev. 0.31

1.8 V or 3.3 V Digital Output Supply.

Signal Level

LVTTL

1.8 V

Data Bus Transmit Order.

For TXMSBSEL = 0, data on TXDIN[0] is trans-

mitted first followed by TXDIN[1] through

TXDIN[15].

For TXMSBSEL = 1, TXDIN[15] is transmitted

first followed by TXDIN[14] through TXDIN[0].

Transmit Data Squelch.

If TXSQLCH is asserted low, the output data

stream on TXDOUT will be forced to 0. If

TXSQLCH = 1, TX squelching is turned off.

Supply Voltage.

Nominally 1.8 V.

Must be tied to either 1.8 V or 3.3 V. When tied

to 3.3 V, LVTTL compatible output voltage

swings on TXLOL and FIFOERR are sup-

ported.

Description