MAX3768CUB Maxim Integrated, MAX3768CUB Datasheet
MAX3768CUB
Specifications of MAX3768CUB
Available stocks
Related parts for MAX3768CUB
MAX3768CUB Summary of contents
Page 1
... Pin Configurations appear at end of data sheet MAX3266 MAX3267 Typical Operating Circuits continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. +3.0V to +5.5V, 1.25Gbps/2.5Gbps ♦ +3.0V to +5.5V Supply Voltage ♦ Low Deterministic Jitter ...
Page 2
... Limiting Amplifiers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ............................................-0.5V to +6.0V CC Voltage at IN+, IN- ..........................(V CC Voltage at SQUELCH, CAZ1, LOS, TH..................................-0. CAZ2, LOS, Voltage at LEVEL...................................................-0.5V to +2.0V Current into LOS, LOS ..........................................-1mA to +9mA Differential Input Voltage (IN+ - IN-) .....................................2.5V Continuous Current at CML Outputs (OUT+, OUT-) ..........................-25mA to +25mA 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 ...
Page 3
... MAX3265/MAX3269/MAX3765 MAX3264/MAX3268/MAX3768 = 20kΩ MAX3265/MAX3269/MAX3765 = 50Ω LOAD = 75Ω LOAD -30µA = +1.2mA = open = 0.1µF MAX3268 MAX3269 MAX3264 MAX3265 Output not squelched MAX3765 MAX3768 Output squelched MAX3765 Limiting Amplifiers = +3.3V MIN TYP MAX 5 19.8 27 40.5 9.4 21.6 18.0 41 400 97 100 103 ...
Page 4
... Limiting Amplifiers ELECTRICAL CHARACTERISTICS—MAX3265EUE (Data outputs terminated per Figure 1, V unless otherwise noted.) (Note 1) PARAMETER Data Rate Input Voltage Range Deterministic Jitter (Notes 2, 3) Random Jitter (Notes 2, 4) Data Output Edge Speed (Note 6) LOS Hysteresis (Notes 2, 7) LOS Assert/Deassert Time ...
Page 5
... RANDOM JITTER vs. INPUT AMPLITUDE INPUT AMPLITUDE (mV) LOSS OF SIGNAL WITH SQUELCH OUT V LOS 500ns/div Limiting Amplifiers MAX3265EUE LOS HYSTERESIS vs. TEMPERATURE 6.5 6.0 5 4.6kΩ TH 5.0 4 16kΩ 4.0 TH 3.5 -40 - TEMPERATURE (°C) MAX3265/MAX3269/MAX3765 DETERMINISTIC JITTER vs. INPUT AMPLITUDE ...
Page 6
... Limiting Amplifiers (T = +25°C, unless otherwise noted.) A MAX3264 DATA OUTPUT EYE DIAGRAM AT 1.25Gbps (MINIMUM INPUT) 150mV/div 200ps/div MAX3265/MAX3765 DATA OUTPUT EYE DIAGRAM 2.5Gbps (MAXIMUM INPUT) 150mV/div 100ps/div MAX3264 LOSS-OF-SIGNAL THRESHOLD vs ...
Page 7
... N.C. Exposed EP EP Paddle _______________________________________________________________________________________ Limiting Amplifiers FUNCTION Supply Ground Noninverted Input Signal Inverted Input Signal Loss-of-Signal Threshold. A resistor connected from this pin to ground sets the input signal level at which the loss-of-signal (LOS) output(s) is asserted. Refer to Typical Operating Characteristics and Design Procedure. ...
Page 8
... Limiting Amplifiers 100Ω 100Ω 100Ω MAX3264 MAX3265 MAX3765 (a) MAX3264/MAX3265/MAX3765 WITH 50Ω TERMINATION MAX3268 MAX3269 MAX3768 (c) MAX3268/MAX3269/MAX3768 OUTPUT TERMINATION Figure 1. Data Output Termination 8 _______________________________________________________________________________________ R TERM 100Ω 100Ω C OUT LOAD 100Ω C OUT ...
Page 9
... CONTROL R TH 2.5kΩ OUT+ MAX3268 MAX3269 OUT- MAX3768 R TH 2.5kΩ Limiting Amplifiers I OUT MAX3264CUE: OPEN MAX3265CUE: OPEN SQUELCH MAX3265CUB: GND (INTERNAL) MAX3765CUB: V (INTERNAL) CC MAX3264CUE: OPEN MAX3265CUE: OPEN LEVEL MAX3265CUB: GND (INTERNAL) MAX3765CUB: GND (INTERNAL) OPEN OPEN 9 ...
Page 10
... Limiting Amplifiers _______________Detailed Description Figure functional diagram of the MAX3264/ MAX3265/MAX3268/MAX3269/MAX3765/MAX3768 lim- iting amplifiers. A linear input buffer drives a multistage limiting amplifier and an RMS power-detection circuit. Offset correction with lowpass filtering ensures low deterministic jitter. The output buffer produces a limited output signal ...
Page 11
... MAX3768, the SQUELCH function is always enabled by internally connecting the MAX3264/MAX3265 is described in Table 1. Table 1. LEVEL PIN Open GND Internal Input/Output Schematics 500Ω Figure 5. LOS Output Circuit Limiting Amplifiers CML Output Buffer . SQUELCH operation for CC VOLTAGE WHEN SQUELCHED OUT 100mV 100mV ...
Page 12
... Limiting Amplifiers V CC GND Figure 6. PECL Output Circuit The buffer’s output impedance is determined by the par- allel combination of internal and external pullup resistors, which are chosen to match the impedance of the trans- mission line (Figure 1). The output buffer can be AC- or DC-coupled to the load ...
Page 13
... Die thickness is 15 mils (0.375mm). ______________________________________________________________________________________ +3.0V to +5.5V, 1.25Gbps/2.5Gbps GBIC MODULE 20log(2) 6dB = = + Figure 8. Recommended GBIC LOS Circuit HOST > CC_ - 2V DRIVING 50Ω TO GROUND Figure 9. Alternative PECL Termination Limiting Amplifiers V MODULE CC_ HOST MAX3264 MAX3265 GENERAL- LOS PURPOSE MAX3268 MAX3269 NPN MAX3765 MAX3768 OUT+ 470Ω ...
Page 14
... Exposed paddle. **Dice are designed to operate from 0°C to +70°C, but are tested and guaranteed only +25° ______________________________________________________________________________________ Typical Operating Circuits (continued MAX3268CUB MAX3269CUB C MAX3768CUB IN 0.01µF IN+ 100Ω IN 0.01µ PIN-PACKAGE 10 µMAX-EP* TOP VIEW 10 µ ...
Page 15
... SQUELCH CAZ2 V CC GND 0.061" OUT+ IN+ (1.55mm) OUT- IN GND LOS Limiting Amplifiers Selector Guide PIN- SQUELCH CML OUTPUT FUNCTION Selectable Selectable Disabled Disabled Disabled Enabled Enabled Chip Topographies MAX3268/MAX3269/MAX3768 N.C. CAZ1 TH N.C. LOS 0.061" (1.55mm) LEVEL Selectable ...
Page 16
... Limiting Amplifiers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages Ø 0.50±0.1 0.6±0.1 1 0.6±0.1 TOP VIEW FRONT VIEW 16 ______________________________________________________________________________________ BOTTOM VIEW ...
Page 17
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 17 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products +3.0V to +5.5V, 1.25Gbps/2.5Gbps ...