MAX24001TL+ Maxim Integrated, MAX24001TL+ Datasheet - Page 15

• Manufacturer Part Number: MAX24001TL+
• Description: Laser Drivers 2.5G Burst Mode Laser Xcvr
• Manufacturer: Maxim Integrated
• Type: Laser Driverr

Specifications of MAX24001TL+

• Rohs: yes
• Data Rate: 2.5 Gbps
• Operating Supply Voltage: 3 V to 3.6 V
• Supply Current: 136 mA
• Maximum Operating Temperature: + 95 C
• Package / Case: TQFN-40
• Maximum Power Dissipation: 2857.1 mW
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Part # Aliases: 90-Y24001+XS1

The MPD current is compared with a threshold current set by the txsd_threshold register. This determines the
MPD current level at which both TX_SD and rogue ONU are detected.
When BEN = ‘0’ the TX_SD logic transfers the comparator output directly through to tx_sd. In addition, the Rogue
ONU Fault Detect logic transfers the comparator output through to the laser safety system. The
txsd_rogueonu_delay register specifies the delay (in cycles of the internal 64MHz clock) between the falling edge
of BEN and testing for rogue ONU. The rogue_onu_fault condition is not generated during this time.
When BEN = ‘1’ the TX_SD logic output goes high when the input from the comparator goes high. This state is
latched. The tx_sd signal will then remain high until either the end of the burst, or until the comparator output
remains low for a period of time exceeding the time defined by the txsd_deglitch_period register. This prevents
tx_sd from toggling during a burst due to the pattern sensitivity of the MPD current. (During bias loop fast-start,
tx_sd is held at ‘1’)
Selection between TX_SD and TX_FAULT functionality is governed by the txsd_select register. The txsd_allow
register holds the pin high until the configuration register load from EEPROM (or microcontroller) is complete. This
avoids multiple transitions on the TX_SD pin during initialization.
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