ASAHI KASEI EMD CORPORATION Differential Zero Delay Clock Buffer AK8122 Features Description Operational Frequency Range: 160MHz – 400MHz Output delay: -30 ±100ps Low Jitter Performance: The AK8122 is a high performance differential zero delay clock buffer IC with Phase Locked Loop (PLL). Target application is DDR2 SDRAM and characteristics of these ICs are acceptable to standards of JEDEC. 20 ps (Period RMS 190 – 360MHz) 30 ps (cycle – cycle RMS 190 – 360MHz) 70 ps (Half Period RMS 190 – 250MHz) 60 ps (Half Period RMS 250 – 300MHz) 40 ps (Half Period RMS 300 – 360MHz) Applications Supply Voltage: 1.8 ±0.1V Operating Temperature Range: -20 to +85℃ : AK8122E DDR2 SDRAM Clock Buffer -40 to +85℃ : AK8122V Package: 8-pin MSOP(Lead Free) Block Diagram TSTI (VSS) TSTO (VDD) BIAS CLKP CLKN FBINP P C L V F P P C F O C OUTP 1/2 VSS OUTN VDD FBINN AK8122 Differential Zero Delay Clock Buffer MS0971-E-00 Dec-10 -1- The brand name of AKEMD’s IC’s AK8122 Pin Descriptions TSTI CLKP 1 2 CLKN 3 7 6 TSTO OUTP OUTN 5 VDD 8 VSS Pin No. Pin Name 1 TSTI Package: 8-Pin MSOP (Top View) Pin Type IN Description IC Test pin (Input) (1) Please tie VSS to this pin. 2 CLKP IN Differential Clock Input (Positive) 3 CLKN IN Differential Clock Input (Negative) 4 VSS -- Ground Power Supply 5 VDD -- 6 OUTN OUT Differential Clock Output (Negative) (2) 7 OUTP OUT Differential Clock Output (Positive) (2) 8 TSTO OUT IC Test pin (Output) (3) Please tie VDD to this pin. (1) Internal pull down 100kΩ (Typ.) (2) Output will be “L” level If CLKP = CLKN = ”L”. Output clock frequency will be lower than 400MHz if CLKP and CLK N are fixed as ”H” and ”L” (or ”L” and CLKN=”H”), respectively. Setting CLKP = CLKN = ”H” is prohibited. (3) Output status is Hi-z for normal operation. Ordering Information Part Number Marking Shipping Packaging Package Temperature Range AK8122V 122V Tape and Reel 8-pin MSOP -40 to 85 ℃ AK8122E 122E Tape and Reel 8-pin MSOP -20 to 85 ℃ Mar-09 MS0971-E-00 -2- The brand name of AKEMD’s IC’s AK8122 Absolute Maximum Rating Over operating free-air temperature range unless otherwise noted Items (1) Symbol Supply Voltage Ratings Unit V VDD -0.3 to 4.6 Input Voltage Vin VSS-0.3 to VDD+0.3 V Input Current (any pins except supplies) IIN ±10 mA Tstg -55 to 130 °C Storage Temperature Note (1) Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to absolute-maximum-rating conditions for extended periods may affect device reliability. Electrical parameters are guaranteed only over the recommended operating temperature range. ESD Sensitive Device This device is manufactured on a CMOS process, therefore, generically susceptible to damage by excessive static voltage. Failure to observe proper handling and installation procedures can cause damage. AKEMD recommends that this device is handled with appropriate precautions. Recommended Operation Conditions Parameter Symbol Conditions Min Typ Max Unit Operating Temperature 1 Ta1 -40 85 °C Operating Temperature 2 Ta2 -20 85 °C Supply Voltage VDD 1.7 1.9 V 400 MHz Input Frequency 160 High Level Input Voltage VIH Pin: CLKP, CLKN Low Level Input Voltage VIL Pin: CLKP, CLKN DC Differential Input Voltage VIDC Pin: CLKP, CLKN 0.3 AC Differential Input Voltage VIAC Pin: CLKP, CLKN Differential Input Reference Voltage Input Slew Rate 1.8 0.65VDD V 0.35VDD V 0.6 VDD -0.4 Vpp VIREF 0.5VDD -0.15 0.5VDD +0.15 V ISR 1 4 V/ns MS0971-E-00 V Dec-10 -3- The brand name of AKEMD’s IC’s AK8122 DC Characteristics All specifications at VDD: over 1.7 to 1.9V, Ta=Ta1(AK8122V) Ta=Ta2(AK8122E) Parameter Conditions MIN IL Pin: CLKP, CLKN VOREF Pin: OUTP, OUTN Symbol Input Current Differential Output Reference Voltage AC Differential Output Voltage (1) VOAC High Level Output Voltage VOH Low Level Output Voltage VOL MAX Unit -10 +10 μA 0.5VDD -0.1 0.5VDD +0.1 V 0.5 VDD-0.4 V Pin: OUTP, OUTN Output Load: Fig.1 Pin: OUTP, OUTN TYP VDD -0.1 IOH=-1mA V Pin: OUTP, OUTN 0.1 IOL=+1mA V Input Load Capacitance Pin: CLKP, CLKN 2.1 pF Input Load Capacitance error Pin: CLKP, CLKN 0.1 pF 50 mA Current Consumption (1) IDD (2) (1) See Fig.8 for output load reference. (2) Output impedance of 60-ohm. No load. VDD = 1.8V, Ta = 25. AC Characteristics All specifications at VDD: over 1.7 to 1.9V, Ta: -20 to +85℃, unless otherwise noted Parameter Symbol Conditions MIN Output Frequency Output Slew Rate (5) Input Clock Duty Cycle Delay Time SFO + DFO + SKEW 250MHz-400MHz (1) Jit 1 Jit 2 Output Clock Jitter Jit 3 Jit 4 Jit 5 Start up Time (6) Period, 1σ, 190–360MHz (2) Cycle-to-cycle, 1σ, 190–360MHz (3) TYP MAX Unit 160 400 MHz 1 3 V/ns % 40 50 60 -130 -30 +70 ps 20 ps 30 ps Half Period, 1σ, 190–250MHz (4) 70 ps Half Period, 1σ, 250–300MHz (4) 60 ps Half Period, 1σ, 300–360MHz (4) 40 ps 200 us tlock (1) See Fig.1. (2) See Fig.2. (3) See Fig.3. (4) See Fig.4. (5) See Fig.8. (6) A provisional target value. Mar-09 MS0971-E-00 -4- The brand name of AKEMD’s IC’s AK8122 Standards of Jitter Fig.1 Delay (Static Phase Offset + Skew) : Tdly = ΣTdly/N Fig.2 Period jitter: Tpj = Tcycn – 1/f0 Fig.3 Cycle to cycle jitter: Tc2cj=Tcn-Tcn+1 Fig.4 Half period jitter: Thpj = Thp – 1/2*f0 Fig.5 Input and Output Slew Rate MS0971-E-00 Dec-10 -5- The brand name of AKEMD’s IC’s AK8122 Measurement Condition VDD VCKp R=30Ω R=30Ω VDD/2 VCKn GND Fig.6 IBIS Model Output Load VDD/2 -VDD/2 10pF Z=25Ω Z=30Ω R=5Ω R=25Ω GND Z=25Ω Z=30Ω R=5Ω R=25Ω GND 10pF -VDD/2 -VDD/2 Fig.7 Output Load Test Circuit 1 VDD 10pF GND Z=30Ω R=1MΩ 1pF R=60Ω GND Z=30Ω 10pF R=1MΩ GND 1pF GND GND Fig.8 Output Load Test Circuit 2 Mar-09 MS0971-E-00 -6- The brand name of AKEMD’s IC’s AK8122 Assumed Power Up Sequence MS0971-E-00 Dec-10 -7- The brand name of AKEMD’s IC’s AK8122 Package Information • Mechanical data • Marking 8 8 5 ｂ 122E YMA ｂ 122V YMA ｃ ａ 5 ｃ ａ １ 4 a: b: c: 4 #1 Pin Index Part number Date code (3 digits) • RoHS Compliance All integrated circuits form Asahi Kasei EMD Corporation (AKEMD) assembled in “lead-free” packages* are fully compliant with RoHS. (*) RoHS compliant products from AKEMD are identified with “Pb free” letter indication on product label posted on the anti-shield bag and boxes. Mar-09 MS0971-E-00 -8- The brand name of AKEMD’s IC’s AK8122 IMPORTANT NOTICE l These products and their specifications are subject to change without notice. When you consider any use or application of these products, please make inquiries the sales office of Asahi Kasei EMD Corporation (AKEMD) or authorized distributors as to current status of the products. l AKEMD assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of any information contained herein. l Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. l AKEMD products are neither intended nor authorized for use as critical components Note1) in any safety, life support, or other hazard related device or system Note2), and AKEMD assumes no responsibility for such use, except for the use approved with the express written consent by Representative Director of AKEMD. As used here: Note1) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. Note2) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. l It is the responsibility of the buyer or distributor of AKEMD products, who distributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKEMD harmless from any and all claims arising from the use of said product in the absence of such notification. MS0971-E-00 Dec-10 -9-