MAX3964A/MAX3968 19-1314 Rev 5 8/06 +3.0V to +5.5V, 125Mbps to 266Mbps Limiting Amplifiers with Loss-of-Signal Detector General Description Features The MAX3969 is a recommended upgrade for the Single Supply: +3.0V to +5.5V MAX3964 and MAX3968. The MAX3964A limiting amplifi- 2mV Input Sensitivity P-P er, with 2mV input sensitivity and PECL data outputs, is P-P 1.2ns Output Edge Speed ideal for low-cost ATM, FDDI, and Fast Ethernet fiber optic applications. Loss-of-Signal Detector with Programmable The MAX3964A features an integrated power detector Threshold that senses the input-signal power. It provides a Analog Received-Signal-Strength Indicator received-signal-strength indicator (RSSI), which is an Output Squelch Function analog indication of the power level and complementary PECL loss-of-signal (LOS) outputs, which indicate when Compatible with 4B/5B Data Coding the power level drops below a programmable threshold. The threshold can be adjusted to detect signal ampli- Ordering Information tudes as low as 2.7mV . An optional squelch function P-P disables switching of the data outputs by holding them at PART TEMP RANGE PIN-PACKAGE a known state during an LOS condition. MAX3964AETP -40C to +85C 20 Thin QFN** The MAX3968 provides the same functionality as the MAX3964AETP+ -40C to +85C 20 Thin QFN** MAX3964A, but has data-output edge speed suitable for MAX3964AC/D -40C to +85C ESCON and 266Mbps fibre channel applications. Dice* The MAX3964A/MAX3968 are available in die form, as MAX3968CEP 0C to +70C 20 QSOP tested wafers, and in 20-pin QSOP packages. The MAX3968C/D 0C to +70C Dice* MAX3964AETP is available in a 20-pin thin QFN package. *Dice are designed to operate over a 0C to +100C junction temperature (Tj) range, but are tested and guaranteed only at T Applications A = +25C. 125Mbps FDDI Receivers **Package Code: T2044-1 155Mbps LAN ATM Receivers +Denotes lead-free package. Fast Ethernet Receivers ESCON Receivers Pin Configurations and Selector Guide appear at end of data sheet. 155Mbps FTTx Receivers Typical Operating Circuit C AZ V CC 1F CZP V CC CZN FILTER 0.1F 10nF RSSI V CC FILTER SQUELCH V LOS+ CC0 V CC V CC CIN LOS- 4700pF MAX3964A PHOTODIODE 50 MAX3968 155Mbps OUT- IN- OUT- TIA 50 OUT+ IN+ OUT+ C 50 IN SUB* IN 4700pF 50 GND GND R1 V INV TH 100k V - 2V CC R2 *PIN NOT AVAILABLE ON MAX3964AETP. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE+3.0V to +5.5V, 125Mbps to 266Mbps Limiting Amplifiers with Loss-of-Signal Detector ABSOLUTE MAXIMUM RATINGS (SUB, GND tied to ground) Continuous Power Dissipation (T = +70C) A V , V .............................................................-0.5V to +7.0V 20-Lead Thin QFN CC CCO FILTER, RSSI, IN+, IN-, CZP, CZN, SQUELCH, (derate 16.9mW/C above +70C) ..........................1349mW LOS+, LOS-, INV, VTH, OUT+, OUT- ......-0.5V to (V + 0.5V) 20-Pin QSOP (derate 6.7mW/C above +70C)...........500mW CC PECL Output Current (OUT+, OUT-, LOS+, LOS-) ............50mA Operating Temperature Range ...........................-40C to +85C Differential Voltage Between CZP and CZN..........-1.5V to +1.5V Operating Junction Temperature Range (die).....-40C to +150C Differential Voltage Between IN+ and IN- .............-1.5V to +1.5V Processing Temperature (die) ........................................+400C Storage Temperature Range .......................... -65C to +160C Lead Temperature (soldering, 10s) ................................+300C 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. ELECTRICAL CHARACTERISTICSMAX3964ACEP/MAX3968CEP (V = +3.0V to +5.5V, PECL outputs terminated with 50 to (V - 2V), T = 0C to +70C, unless otherwise noted. Typical values CC CC A are at V = +3.3V and T = +25C.) (Note 1) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current I PECL outputs open 22 40 mA CC LOS Hysteresis Input = 3.3mV to 90mV (Note 2) 3.8 5 8.0 dB P-P P-P SQUELCH Input Current V = V , T = +25C 27 100 A SQUELCH CC A PECL Output Voltage High (Note 3) -1025 -880 mV PECL Output Voltage Low (Note 3) -1810 -1620 mV PECL LOS Output Voltage High (Note 3) -1035 -880 mV PECL LOS Output Voltage Low (Note 3) -1810 -1620 mV LOS Assert Accuracy Input = 7mV or 90mV -2.5 +2.5 dB P-P P-P Minimum LOS Assert Input 2.7 mV P-P Maximum LOS Deassert Input 143 mV P-P Input Sensitivity 2.0 3.3 mV P-P Input Overload 1.5 V P-P 20% to 80% transition time, MAX3964A 0.92 1.2 2.20 Output Transition Time t , t ns r f MAX3968 0.4 0.8 1.2 Pulse-Width Distortion (Note 4) 50 200 ps 2 MAX3964A/MAX3968