V23848-N15-C56 Datasheet, PDF (6/29 Pages) Infineon Technologies AG – iSFP-Intelligent Small Form-factor Pluggable SONET OC-48 SR-1 / SDH STM I-16 Multirate Applications up to 2.67 Gbit/s

V23848-N15-C56
V23848-N15-C456
Description
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.
A low signal on TxDis enables transmitter. If TxDis is high or not connected the
transmitter is disabled.
An enhanced Digital Diagnostic Monitoring Interface (Intelligent) has been incorporated
into the Infineon Small Form-factor Pluggable (SFP) transceiver. This allows real time
access to transceiver operating parameters, based on the SFF-8472.
This transceiver features Internal Calibration. Measurements are calibrated over
operating temperature and voltage and must be interpreted as defined in SFF-8472.
The transceiver generates this diagnostic data by digitization of internal analog signals
monitored by a new diagnostic Integrated Circuit (IC).
This diagnostic IC has inbuilt sensors to include alarm and warning thresholds. These
threshold values are set during device manufacture and therefore allow the user to
determine when a particular value is outside of its operating range.
Alarm and Warning Flags are given. Alarm Flags indicate conditions likely to be
associated with an inoperational link and cause for immediate action. Warning Flags
indicate conditions outside the normally guaranteed bounds but not necessarily causes
of immediate link failures.
These enhanced features are in addition to the existing SFP features provided by the
manufacturer i.e. serial number and other vendor specific data.
The serial ID interface defines a 256 byte memory map in EEPROM, accessible over a
2 wire, serial interface at the 8 bit address 1010000X (A0h).
The Digital Diagnostic Monitoring Interface makes use of the 8 bit address 1010001X
(A2h), so the originally defined serial ID memory map remains unchanged and is
therefore backward compatible.
Digital Diagnostic Monitoring Parameters
Parameter
Accuracy SFF-8472
Tx Optical Power
±3 dB
Rx Optical Power
±3 dB
Bias Current
±10%
Power Supply Voltage
±3%
Transceiver Temperature
±3°C
Accuracy Actual
±3 dB
±3 dB
±10%
±3%
±3°C
Preliminary Product Information
6
2004-06-22