AK8138MV Low Spurious Multiclock Generator with XO AK8138MV Features Description The AK8138MV is a member of AKM’s low power multi clock generator family designed for a high quality audio cock with high performance C/N. The AK8138MV generates different frequency clocks from a 27MHz crystal oscillator or external 27MHz clock input. It provides them to up to four outputs configured by pin-setting. Both circuitries of XO and PLL in AK8138MV are derived from AKM’s long-term-experienced clock device technology, and enable clock output to perform low jitter and to operate with very low current consumption. The AK8138MV is available in a 16-pin SSOP package. 27MHz Crystal Input or External Input Four Frequency-Selectable Clock Outputs One 27MHz-Reference Output Selectable Clock out Frequencies: - CLK1: 24.576MHz - CLK2: 2.048,4.096,8.192,11.2896,12.288, 22.5792MHz - CLK3: 6.144,8.192,11.2896,12.288, 16.9344,22.5792MHz - CLK4: 8.4672,11.2896,13.824, 16.9344MHz Built-in XO Low Jitter Performance - Period Jitter: 30 psec (Typ.) at CLK1-4 - Long Term Jitter: 60 psec (Typ.) at CLK1-4 Low Current Consumption: 18.0mA (Typ.) at 3.3V, S[3:0]=’HHHH’ Supply Voltage: 2.85V to 3.6V Operating Temperature Range: -40℃ to +85℃ Package: 16-pin SSOP (Lead free, Halogen free) Applications Personal Video Recorders Set-Top-Boxes Multi Media Receivers Block Diagram VDD XIN Crystal Oscillator PLL1 PLL1 XOUT PLL2 Divide Logic and Output Control CLK1 CLK2 CLK3 S0 CLK4 S1 S2 REFOUT S3 GND AK8138MV Multi Clock Generator MS1211-E-01 May-11 -1- AK8138MV Pin Descriptions Package: 16-Pin SSOP(Top View) XOUT 1 16 XIN S0 2 15 VDD3 S1 3 14 S3 S2 4 13 VDD2 VDD1 5 12 GND2 GND1 6 11 CLK4 CLK1 7 10 CLK3 CLK2 8 9 REFOUT Pin No. Pin Name Pin Type 1 XOUT OUT 2 S0 IN Clock Out Frequency select 0, See Table 2 for the selection (1) 3 S1 IN Clock Out Frequency select 1, See Table 2 for the selection (1) 4 S2 IN Clock Out Frequency select 2, See Table 2 for the selection (1) 5 VDD1 -- Power Supply 1 6 GND1 -- Ground 1 7 CLK1 OUT Clock output 1, See Table 1 for its selectable frequency (2) 8 CLK2 OUT Clock output 2, See Table 2 for its selectable frequency (2) 9 REFOUT OUT Reference Clock Output of 27.000MHz Crystal or external clock (2) 10 CLK3 OUT Clock output 3, See Table 2 for its selectable frequency (2) 11 CLK4 OUT Clock output 4, See Table 2 for its selectable frequency (2) 12 GND2 -- Ground 2 13 VDD2 -- Power Supply 2 14 S3 IN Clock Out Frequency select 3, See Table 1 for the selection 15 VDD3 -- Power Supply 3 Description Crystal connection, Connect to 27.000MHz crystal Please open when an external clock input is used (1) Crystal connection, Connect to 27.000MHz crystal 16 XIN IN Or external clock input (minimum 1Vpp input). Input becomes binary after passing an internal HPF. Input Resistance is 37.5k-ohm. (1) Internal pull up 360kΩ (2) Internal pull down 510kΩ Ordering Information Part Number Marking Shipping Packaging Package Temperature Range AK8138MV 8138MV Tape and Reel 16-pin SSOP -40 to 85 ℃ MS1211-E-01 May-11 -2- AK8138MV Absolute Maximum Rating Over operating free-air temperature range unless otherwise noted (1) Items Symbol Ratings Unit VDD -0.3 to 4.6 V 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 Supply voltage 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. AKM recommends that this device is handled with appropriate precautions. Recommended Operation Conditions Parameter Operating temperature Supply voltage (1) Output Load Capacitance Symbol Ta Conditions AK8138MV VDD Min Typ -40 2.85 3.3 Max Unit 85 °C 3.6 V Cp1 Pin: CLK1-4 15 pF Cp2 Pin: REFOUT 25 pF Note: (1) Power to VDD1, VDD2 and VDD3 requires to be supplied from a single source. A decoupling capacitor of 0.1μF for power supply line should be installed close to each VDD pin. MS1211-E-01 May-11 -3- AK8138MV DC Characteristics All specifications at VDD: over 2.85 to 3.6V, Ta = -40 to 85 ℃ unless otherwise noted Parameter Symbol Conditions High level input voltage VIH Pin: S0,S1,S2,S3 Low level input voltage VIL Pin: S0,S1,S2,S3 Input leak current IL Pin: S0,S1,S2,S3 High Level output voltage VOH Low level output Voltage VOL Current consumption IDD MIN TYP MAX 0.7VDD V -20 Pin: CLK1-4, REFOUT IOH=-4mA Pin: CLK1-4, REFOUT IOL=+4mA Unit 0.3VDD V +10 μA 0.8VDD V 0.2VDD Ta=25℃, No load 18.0 S[3:0] = ‘HHHH’ V mA AC Characteristics All specifications at VDD: over 2.85 to 3.6V, Ta = -40 to 85 ℃ unless otherwise noted Parameter Symbol Conditions MIN TYP MAX Unit Crystal clock frequency Pin: XIN, XOUT 26.9 27.0000 27.1 MHz External clock frequency Pin: XIN(1) 26.9 27.0000 27.1 MHz Period jitter (4) Pin: CLK1-4(2), REFOUT (3) (2) Pin: CLK1-4 , REFOUT 1000cycles Long Term jitter (4) Output Clock duty Cycle Output clock rise time ps 60 ps Pin: CLK1-4 (2) 45 50 55 % Pin: REFOUT (3) 40 50 60 % trise Pin: CLK1-4 (2), REFOUT (3) 2.5 ns tfall Pin: CLK1-4 (2) 2.5 ns Pin: CLK1-4 (2) 5 ms Output clock fall time Output Lock Time 30 (3) (4) , REFOUT (3) (1) Amplitude is 1Vpp or more. (2) Measured with load capacitance of 15pF (3) Measured with load capacitance of 25pF (4) 1σ in 10000 sampling or more (5) The time that output reaches the target frequency within accuracy of ±0.1% from the point that the power supply reaches VDD. MS1211-E-01 May-11 -4- AK8138MV Output clock frequency selection The AK8138MV generates a range of low-jitter and high-accuracy clock frequencies with two built-in PLLs and provides to up to four assigned outputs. A frequency selection at assigned output pin is configured by pin-setting of S0 (Pin2), S1 (Pin3), S2(Pin4) and S3 (Pin14). The selectable frequency is shown in Table1. Sampling Frequency (kHz) Selection Pin Clock Output Frequency (MHz) CLK4 (Pin 7) CLK2 256fs (Pin 8) CLK3 384fs (Pin 10) (Pin 11) L 24.576 12.288 OFF OFF L H 24.576 11.2896 16.9344 OFF L H L 24.576 8.192 12.288 OFF L L H H 24.576 22.5792 OFF OFF 16/22.05 H H L L 24.576 4.096 11.2896 8.4672 16/44.1 H H L H 24.576 4.096 22.5792 8.4672 8/16 H H H L 24.576 2.048 6.144 16.9344 8/16 H H H H 24.576 4.096 11.2896 11.2896 EXT1 L L L L 24.576 2.048 8.192 13.824 EXT2 L L L H 24.576 OFF OFF 13.824 Reserved L L H L OFF OFF OFF OFF Reserved L L H H OFF OFF OFF OFF Reserved L H L L OFF OFF OFF OFF Reserved L H L H OFF OFF OFF OFF Reserved L H H L OFF OFF OFF OFF Reserved L H H H OFF OFF OFF OFF S3 S2 S1 S0 CLK1 (Pin 14) (Pin 4) (Pin 3) (Pin 2) 48.0 L L L 44.1 L L 32.0 L 88.2 Table 1: CLK1-4 Clock output Frequency MS1211-E-01 May-11 -5- AK8138MV Typical Connection Diagram +3.3V typ. 27.0MHz Crystal Cext2 Cext1 AK8138MV XIN:16 1:XOUT SW0 2:S0 SW1 3:S1 S3:14 SW2 4:S2 VDD2:13 5:VDD1 GND2:12 6:GND1 CLK4:11 C1 C3 SW3 VDD3:15 7:CLK1 CLK3:10 8:CLK2 REFOUT:9 C2 GND Clock Output A: Crystal connection +3.3V typ. 27MHz External Clock AK8138MV 1:XOUT XIN:16 SW0 2:S0 VDD3:15 SW1 3:S1 S3:14 SW2 4:S2 VDD2:13 5:VDD1 GND2:12 6:GND1 CLK4:11 C1 7:CLK1 CLK3:10 8:CLK2 REFOUT:9 C3 SW3 C2 GND Clock Output B: External clock input Figure 1: Typical Connection Diagram C1-3 : 0.1μF Cext1-2 : Depends on crystal characteristics. Refer the specification of the crystal. SW0-3 : Open is “H” and tied to GND is “L” for S0, S1, S2 ａｎｄ S3, because these pins have internal pull up resister. MS1211-E-01 May-11 -6- AK8138MV PCB Layout Consideration The AK8138MV is a high-accuracy and low-jitter multi clock generator. For proper performances specified in this datasheet, careful PCB layout should be taken. The followings are layout guidelines based on the typical connection diagram shown in Figure 1 Power supply line – AK8138MV has three power supply pins (VDD1-3) which deliver power to internal circuitry segments. A 0.1μF decoupling capacitor should be placed as close to each VDD pin as possible. Ground pin connection – AK8138MV has two ground pins (GND1-2). These pin require connecting to plane ground which will eliminate any common impedance with other critical switching signal return. 0.1μF decoupling capacitors placed at VDD1, VDD2, and VDD3 should be grounded at close to the GND1pin, the GND2 pin, and the GND2, respectively. Crystal connection – Proper oscillation performance are susceptible to stray or parasitic capacitors around crystal. The wiring traces to a crystal form XIN (Pin 16) and XOUT (Pin 1) have equal lengths with no via and as short in length as possible. These traces should be also located away from any traces with switching signal. MS1211-E-01 May-11 -7- AK8138MV Package Information • Mechanical data 16pin SSOP (Unit: mm) 5.0 +0.3 -0.1 16 9 A 6.4±0.3 4.4 ±0.2 8 1 0.65 0.22±0.05 0.15±0.1 1.15 ±0.1 0.1±0.1 Detail A 0.5 ±0.2 0.1 ±0.1 0.1 0-10° • Marking 16 b a: #1 Pin Index b: Part number c: Date code (5 digits) 9 c 8138MV XXXXX a 1 8 • RoHS Compliance All integrated circuits form Asahi Kasei Microdevices Corporation (AKM) assembled in “lead-free” packages* are fully compliant with RoHS. (*) RoHS compliant products from AKM are identified with “Pb free” letter indication on product label posted on the anti-shield bag and boxes. MS1211-E-01 May-11 -8- AK8138MV This page is intentionally blank. MS1211-E-01 May-11 -9- AK8138MV IMPORTANT NOTICE z 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 Microdevices Corporation (AKM) or authorized distributors as to current status of the products. z Descriptions of external circuits, application circuits, software and other related information contained in this document are provided only to illustrate the operation and application examples of the semiconductor products. You are fully responsible for the incorporation of these external circuits, application circuits, software and other related information in the design of your equipments. AKM assumes no responsibility for any losses incurred by you or third parties arising from the use of these information herein. AKM assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of such information contained herein. z 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. z AKM products are neither intended nor authorized for use as critical componentsNote1) in any safety, life support, or other hazard related device or systemNote2), and AKM assumes no responsibility for such use, except for the use approved with the express written consent by Representative Director of AKM. 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. z It is the responsibility of the buyer or distributor of AKM 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 AKM harmless from any and all claims arising from the use of said product in the absence of such notification. MS1211-E-01 May-11 - 10 -