MAX3274

Supply Voltage (V_CC) ............................................-0.5V to +6.0V
Continuous CML Output Current
(OUT+, OUT-) ...............................................-25mA to +25mA
CML Input Voltage (IN+, IN-) .....................-0.5V to (V_CC + 0.5V)
Differential Input Voltage (IN+, IN-)....................................2VP-P
TTL Input Voltage
(BWSEL, SQUELCH, TEST)............................-0.5V to (V_CC + 0.5V)
Voltage at TH ................................................-0.5V to V_CC + 0.5V
Current into TH...................................................................5.0mA
Open Collector (LOS, LOS).....................................-0.5V to +5.5V
Operating Ambient Temperature Range ...........-40°C to +85°C
Storage Ambient Temperature Range.............-55°C to +100°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The MAX3274 dual-rate Fibre Channel limiting amplifier is optimized for use in dual-rate 2.125Gbps/1.0625Gbps Fibre Channel optical receiver systems. An on-chip selectable fourth-order Bessel Thompson filter offers 15dB (typ) of attenuation at 2GHz to suppress the relaxation oscillation (RO) found in legacy transmitters. The amplifier accepts a wide range of input voltages and provides constant-level output voltages with controlled edge speeds. Receivers using the MAX3275/MAX3277 transimpedance amplifiers (TIA) and the MAX3274 dualrate limiting amplifier can meet the Fibre Channel receiver sensitivity optical modulation amplitude (OMA) specification of 49mW_P-P at 2.125Gbps and 31mW_P-P at 1.0625Gbps. Additional features include a programmable threshold loss-of-signal (LOS) detector, output squelch, and bandwidth select. The MAX3274 features current-mode logic (CML) data outputs. The MAX3274 is available in a 16-pin QFN package, making it ideal for GBIC and small form-factor receiver modules.