V23818-C18-L47 Datasheet, PDF (4/17 Pages) Infineon Technologies AG – Small Form Factor Single Mode 1300 nm Multirate up to 155 Mbit/s Transceiver 2x5 Pinning with LC™ Connector

V23818-C18-Lxx/L4xx
V_EEr / V_EEt
Connect pins 1 and 7 to signal ground.
Pin Configuration
V_CCr / V_CCt
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-C18-L4x terminated and AC coupled
internally. For V23818-C18-L3x/L436 use termination and coupling as shown in the
termination scheme.
RD– / RD+
Receiver data LVPECL level outputs. For V23818-C18-L4x biased and AC coupled
internally. For V23818-C18-L3x/L436 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-C18-L4x. LVPECL output for V23818-C18-L3x/L436. 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.
Data Sheet
4
2003-06-06