V23870-A2111-A100 Datasheet, PDF (3/11 Pages) Infineon Technologies AG – Bi-Directional Pigtail SFF Transceiver 155 Mb/s, 1310 nm Tx / 1310 nm Rx

The receiver component converts the optical serial data into PECL compatible electrical data (RD and RDnot). The
Signal Detect (SD, active high) shows whether an optical signal is present.
The transmitter converts PECL compatible electrical serial data (TD and TDnot) into optical serial data. Data lines
are differentially 100Ω terminated.
The transmitter contains a laser driver circuit that drives the modulation and bias current of the laser diode. The
currents are controlled by a power control circuit to guarantee constant output power of the laser over temperature
and aging.
The power control uses the output of the monitor PIN diode (mechanically built into the laser coupling unit) as a
controlling signal, to prevent the laser power from exceeding the operating limits.
Single fault condition is ensured by means of an integrated automatic shutdown circuit that disables the laser
when it detects laser fault to guarantee the laser Eye Safety.
The transceiver contains a supervisory circuit to control the power supply. This circuit makes an internal reset
signal whenever the supply voltage drops below the reset threshold. It keeps the reset signal active for at least
140 milliseconds after the voltage has risen above the reset threshold. During this time the laser is inactive.
The laser can be disabled by the TxDis input.
Technical Data
The electro-optical characteristics described in the following tables are valid only for use under the recommended
operating conditions.
Recommended Operating Conditions
Operating Temperature Range at Case¹
Operating Temperature Range at Case²
Power Supply Voltage
Transmitter
Data Input Differential Voltage
Receiver
Input Center Wavelength
Symbol
T_C
T_C
V_CC-V_EE
Min.
0
-40
3.1
Typ.
3.3
Max. Unit
+70
°C
+85
°C
3.53 V
V_DIFF
250
1600 mV
λ_C
1500
1600 nm
1 _{For V23870-A2111-xx00}
2 _{For V23870-A2112-xx00}
Fiber Optics
3
V23870-A2111/2-xx00 BIDI Pigtail SFF transceiver