V23818-K15-Lxx

Pin Configuration

Data Sheet

5

2003-03-21

V

For 2x10 transceivers a 3.3 V DC power supply must be applied at pins 7 and 11. For

2x5 transceivers a 3.3 V DC power supply must be applied at pins 2 and 6. A

recommended power supply filter network is given in the termination scheme. Locate

power supply filtering directly at the transceiver power supply pins. Proper power supply

filtering is essential for good EMI performance.

TD+ / TD–

Transmitter

data

LVPECL

level

inputs.

For

V23818-K15-L47/L46/L57/L56/L45

terminated and AC coupled internally. For V23818-K15-L37/L36/L17/L16/L35 use

termination and coupling as shown in the termination scheme.

RD– / RD+

Receiver data LVPECL level outputs. For V23818-K15-L47/L46/L57/L56/L45 biased and

AC coupled internally. For V23818-K15-L37/L36/L17/L16/L35 use termination and

coupling as shown in the termination scheme.

TDis

A logical LVTTL high input will disable the laser. To enable the laser, an LVTTL low input

must be applied. Leave pin unconnected if feature not required.

SD

LVTTL output for V23818-K15-L47/L46/L57/L56/L45.

LVPECL output for V23818-K15-L37/L36/L17/L16/L35.

A logical high output indicates normal optical input levels to the receiver. Low optical

input levels at the receiver result in a low output. Signal Detect can be used to determine

a definite optical link failure; break in fiber, unplugging of a connector, faulty laser source.

However it is not a detection of a bad link due to data-related errors.

MS

Mounting studs are provided for transceiver mechanical attachment to the circuit board.

They also provide an optional connection of the transceiver to the equipment chassis

ground. The holes in the circuit board must be tied to chassis ground.

HL

Housing leads are provided for additional signal grounding. The holes in the circuit board

must be included and tied to signal ground.