19-2397; Rev 0; 4/02 Lowest Power 3.0GHz ECL/PECL Differential Data and Clock D Flip-Flop The MAX9381 differential data, differential clock D flipflop is pin compatible with the ON Semiconductor MC100EP52, with the added benefit of a wider supplyvoltage range from 2.25V to 5.5V and 25% lower supply current. Data enters the master part of the flip-flop when the clock is low and is transferred to the outputs upon a positive transition of the clock. Interchanging the clock inputs allows the part to be used as a negative edge-triggered device. The MAX9381 utilizes input clamping circuits that ensure the stability of the outputs when the inputs are left open or at VEE. The MAX9381 is offered in an 8-pin SO package and the smaller 8-pin µMAX package. Features ♦ 3.0GHz Guaranteed Operating Clock Frequency ♦ 0.2psRMS Added Random Jitter ♦ 328ps Typical Propagation Delay ♦ PECL Operation from VCC = 2.25V to 5.5V with VEE = 0V ♦ ECL Operation from VEE = -2.25V to -5.5V with VCC = 0V ♦ Input Safety Clamps Ensure Output Stability when Inputs are Open or at VEE ♦ ±2kV ESD Protection (Human Body Model) Applications Precision Clock and Data Distribution Central Office Ordering Information DSLAM Base Station PART MAX9381ESA MAX9381EUA* ATE *Future product—contact factory for availability. DLC TEMP RANGE -40°C to +85°C -40°C to +85°C PIN-PACKAGE 8 SO 8 µMAX Pin Configuration Functional Diagram TOP VIEW MAX9381 D D 1 2 8 75kΩ 75kΩ D Q 7 VCC D 1 8 VCC D 2 7 Q 3 6 Q CLK 4 5 VEE MAX9381 Q CLK CLK CLK 3 Q 4 6 5 75kΩ Q SO/µMAX VEE 75kΩ ________________________________________________________________ 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. 1 MAX9381 General Description MAX9381 Lowest Power 3.0GHz ECL/PECL Differential Data and Clock D Flip-Flop ABSOLUTE MAXIMUM RATINGS VCC - VEE ...............................................................-0.3V to +6.0V Input Voltage (D, D, CLK, CLK) .......(VEE - 0.3V) to (VCC + 0.3V) Differential Input Voltage ...............Smaller of |VCC - VEE| or 3.0V Output Current (Q, Q) Continuous .......................................................................50mA Surge..............................................................................100mA Junction-to-Ambient Thermal Resistance in Still Air 8-Pin µMAX ..............................................................+221°C/W 8-Pin SO ...................................................................+170°C/W Maximum Continuous Power Dissipation 8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW 8-Pin SO (derate 5.9mW/°C above +70°C)...................471mW Junction-to-Ambient Thermal Resistance with 500LFPM Airflow 8-Pin µMAX ..............................................................+155°C/W 8-Pin SO .....................................................................+99°C/W Junction-to-Case Thermal Resistance 8-Pin µMAX ................................................................+39°C/W 8-Pin SO .....................................................................+40°C/W Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C ESD Protection Human Body Model ..........................................................±2kV Soldering Temperature (10s) ...........................................+300°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. DC ELECTRICAL CHARACTERISTICS (VCC - VEE = 2.25V to 5.5V (TA = +25°C to +85°C), VCC - VEE = 2.375V to 5.5V (TA = -40°C to +25°C), outputs terminated with 50Ω ±1% to VCC - 2.0V, unless otherwise noted. Typical values are at VCC - VEE = 3.3V, VIHD = VCC - 1.0V, VILD = VCC - 1.5V, unless otherwise noted.) (Notes 1, 2, and 3) PARAMETER SYMBOL CONDITIONS -40°C MIN TYP +25°C MAX MIN TYP +85°C MAX MIN TYP MAX UNITS INPUTS (D, D, CLK, CLK) Differential Input High Voltage VIHD Figure 1 VEE + 1.2 VCC VEE + 1.2 VCC VEE + 1.2 VCC V Differential Input Low Voltage VILD Figure 1 VEE VCC 0.15 VEE VCC 0.15 VEE VCC 0.15 V VCC - VEE < 3.0V 0.15 VCC VEE 0.15 VCC VEE 0.15 VCC VEE VCC - VEE ≥ 3.0V 0.15 3.0 0.15 3.0 0.15 3.0 -10 +200 -10 +200 -10 +200 µA Differential Input Voltage Single-Ended Input Current VID IIH, IIL Figure 1 D, D, CLK, or CLK = VIHD or VILD V OUTPUTS (Q, Q) Output High Voltage VOH Figure 1 VCC 1.145 VCC 0.895 VCC 1.145 VCC 0.895 VCC 1.145 VCC 0.895 V Output Low Voltage VOL Figure 1 VCC 1.945 VCC 1.695 VCC 1.945 VCC 1.695 VCC 1.945 VCC 1.695 V Differential Output Voltage VOD VOH - VOL, Figure 1 550 550 550 mV POWER SUPPLY Power-Supply Current (Note 4) 2 IEE 17 35 20 35 22 _______________________________________________________________________________________ 35 mA Lowest Power 3.0GHz ECL/PECL Differential Data and Clock D Flip-Flop (VCC - VEE = 2.25V to 5.5V (TA = +25°C to +85°C), VCC - VEE = 2.375V to 5.5V (TA = -40°C to +25°C), outputs terminated with 50Ω ±1% to VCC - 2.0V, fCLK ≤ 3.0GHz, input transition time = 125ps (20% to 80%), VIHD = VEE + 1.2V to VCC, VILD = VEE to VCC - 0.15V, VIHD - VILD = 0.15V to smaller of |VCC - VEE| or 3V, unless otherwise noted. Typical values are at VCC - VEE = 3.3V, VIHD = VCC - 1.0V, VILD = VCC - 1.5V, unless otherwise noted.) (Notes 1, 5) PARAMETER SYMBOL Propagation Delay CLK, CLK to Q, Q tPHL tPLH Maximum Clock Frequency fCLKMAX CONDITIONS -40°C MIN TYP Figure 2 +25°C MAX MIN 370 +85°C TYP MAX 328 405 MIN TYP MAX 490 UNITS ps VOD ≥ 300mV 3.0 3.0 3.0 GHz Setup Time tS Figure 2 100 100 100 ps Hold Time tH Figure 2 50 50 50 ps Added Random Jitter (Note 6) tRJ Differential Output Rise/Fall Time tR/tF 20% to 80%, Figure 2 70 0.2 0.8 120 170 80 0.2 0.8 120 180 90 0.2 0.8 ps (RMS) 120 200 ps Note 1: Measurements are made with the device in thermal equilibrium. Note 2: Current into a pin is defined as positive. Current out of a pin is defined as negative. Note 3: DC parameters are production tested at +25°C. DC limits are guaranteed by design and characterization over the full operating temperature range. Note 4: All pins floating except VCC and VEE. Note 5: Guaranteed by design and characterization, and are not production tested. Limits are set to ±6 sigma. Note 6: Device jitter added to the input clock. _______________________________________________________________________________________ 3 MAX9381 AC ELECTRICAL CHARACTERISTICS Typical Operating Characteristics (VCC - VEE = 3.3V, outputs loaded with 50Ω ±1% to VCC - 2V, VIH = VCC - 1V, VIL = VCC - 1.5V, fCLK = 3GHz, fD = fCLK/2 input transition time = 125ps (20% to 80%), unless otherwise noted.) SUPPLY CURRENT (IEE) vs. TEMPERATURE 22 20 18 MAX9381 toc02 800 OUTPUT AMPLITUDE (mV) INPUTS AND OUTPUTS OPEN 700 600 500 400 16 300 -15 10 35 60 85 0 0.5 1.0 1.5 2.0 2.5 TEMPERATURE (°C) CLK FREQUENCY (GHz) OUTPUT RISE/FALL TIME vs. TEMPERATURE CLK-TO-Q PROPAGATION DELAY vs. TEMPERATURE MAX9381 toc03 125 fCLK = 1.5GHz 123 121 RISE TIME 119 FALL TIME 117 3.0 360 IN-TO-OUT PROPAGATION DELAY (ps) -40 MAX9381 toc04 SUPPLY CURRENT (mA) OUTPUT AMPLITUDE (VOH - VOL) vs. CLK FREQUENCY MAX9381 toc01 24 OUTPUT RISE/FALL TIME (ps) MAX9381 Lowest Power 3.0GHz ECL/PECL Differential Data and Clock D Flip-Flop 350 340 tPHL 330 tPLH 115 320 -40 -15 10 35 TEMPERATURE (°C) 4 60 85 -40 -15 10 35 60 85 TEMPERATURE (°C) _______________________________________________________________________________________ Lowest Power 3.0GHz ECL/PECL Differential Data and Clock D Flip-Flop PIN NAME FUNCTION 1 D Noninverting D Input to the Flip-Flop. Internally pulled down with a 75kΩ resistor to VEE. 2 D Inverting D Input to the Flip-Flop. Internally pulled down with a 75kΩ resistor to VEE. 3 CLK Noninverting Clock Input to the Flip-Flop. Internally pulled down with a 75kΩ resistor to VEE. 4 CLK Inverting Clock Input to the Flip-Flop. Internally pulled down with a 75kΩ resistor to VEE. 5 VEE 6 Q Inverting Q Output from the Flip-Flop. Terminate with a 50Ω resistor to VCC - 2V or equivalent. 7 Q Noninverting Q Output from the Flip-Flop. Terminate with a 50Ω resistor to VCC - 2V or equivalent. 8 VCC Negative Supply Positive Supply. Bypass from VCC to VEE with 0.1µF and 0.01µF ceramic capacitors. Place the capacitors as close to the device as possible with the smaller value capacitor closest to the device. Detailed Description The MAX9381 D flip-flop transfers the logic level at the D input to the Q output on a rising edge transition of the clock, provided the minimum setup and hold times are met. By interchanging the CLK and CLK inputs, the flipflop functions as a falling-edge triggered flip-flop. The input signals (D, D and CLK, CLK) are differential and have a maximum differential input voltage of 3.0V or VCC - VEE, whichever is less. To ensure that the outputs remain stable when the inputs are left open, each of the inputs is driven low by a 75kΩ bias resistor connected to VEE. If the D and D inputs are left open or at VEE, the output is guaranteed to be a differential low on the next low-to-high transition of the clock. If the CLK and CLK inputs are left open or at VEE, the outputs remain unchanged (Table 1). Terminate the outputs (Q, Q) through 50Ω to VCC - 2V or an equivalent Thevenin termination (see the Output Termination section). ECL/PECL Operation Output levels are referenced to VCC and are considered PECL or ECL, depending on the level of the VCC VCC Table 1. Truth Table* D, D L H Open or VEE X CLK, CLK ↑ ↑ ↑ Open or VEE Q, Q L H L No change *Where logic states are differential, ↑ is a low-to-high transition and X signifies a don’t care state. supply. With VCC connected to a positive supply and VEE connected to GND, the outputs are PECL. The outputs are ECL when VCC is connected to GND and VEE is connected to a negative supply. Applications Information T Flip-Flop The MAX9381 can be configured as a T flip-flop by connecting Q to D and Q to D. This configuration provides an output at half the frequency of the clock. The maximum operating frequency is determined by the sum of the setup time, the propagation delay of the VIHD (MAX) VCC VID = 0 VID VOH VILD (MAX) VOH - VOL VIHD (MIN) VID VOL VID = 0 VEE VILD (MIN) INPUT VOLTAGE DEFINITION VEE OUTPUT VOLTAGE DEFINITION Figure 1. Input and Output Voltage Definitions _______________________________________________________________________________________ 5 MAX9381 Pin Description MAX9381 Lowest Power 3.0GHz ECL/PECL Differential Data and Clock D Flip-Flop tS tH D D CLK CLK t PLH t PHL Q Q 80% Q-Q DIFFERENTIAL OUTPUT WAVEFORM 80% 0V (DIFFERENTIAL) 0V (DIFFERENTIAL) 20% 20% tR tF Figure 2. CLK-to-Q Propagation Delay and Transition Timing Diagram device and any added delay by circuit board traces. The minimum supply voltage is 2.375V and is determined by input and output voltage range. Output Termination Terminate the outputs through 50Ω to VCC - 2V or use equivalent Thevenin terminations. Terminate each Q and Q outputs with identical termination on each for the lowest output distortion. When a single-ended signal is taken from the differential output, terminate both Q and Q. Ensure that output currents do not exceed the current limits as specified in the Absolute Maximum Ratings table. Under all operating conditions, the device’s total thermal limits should be observed. Power-Supply Bypassing Bypass VCC to VEE with high-frequency surface-mount ceramic 0.1µF and 0.01µF capacitors. Place the capacitors as close to the device as possible with the 0.01µF capacitor closest to the device pins. Use multiple vias when connecting the bypass capacitors to ground. This reduces trace inductance, which lowers power-supply bounce when drawing high transient currents. Circuit Board Traces Circuit board trace layout is very important to maintain the signal integrity of high-speed differential signals. Maintaining integrity is accomplished in part by reducing signal reflections and skew, and increasing common-mode noise immunity. Signal reflections are caused by discontinuities in the 50Ω characteristic impedance of the traces. Avoid discontinuities by maintaining the distance between differential traces, not using sharp corners, or using vias. Maintaining distance between the traces also increases common-mode noise immunity. Reducing signal skew is accomplished by matching the electrical length of the differential traces. Chip Information TRANSISTOR COUNT: 375 PROCESS: Bipolar 6 _______________________________________________________________________________________ Lowest Power 3.0GHz ECL/PECL Differential Data and Clock D Flip-Flop E ÿ 0.50±0.1 8 INCHES DIM A A1 A2 b H c D e E H 0.6±0.1 1 L 1 α 0.6±0.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6∞ 0∞ 0.0207 BSC 8LUMAXD.EPS 9LUCSP, 3x3.EPS 4X S 8 MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0∞ 6∞ 0.5250 BSC TOP VIEW A1 A2 e A α c b L SIDE VIEW FRONT VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 1 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX9381 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)