ASAHI KASEI EMD CORPORATION Register Programmable Clock Generator AK8141 Features · · · · · · · · Description The AK8141 is a single clock generator IC with an integrated PLL. It can generate a 27.0MHz – 50.0MHz by 1MHz step or 33.75MHz, 40.5MHz, 49.5MHz clock from a 48MHz, 24MHz, 12MHz and 27MHz master clock input frequency. The output can be enabled or disabled with pin and the frequency can be changed via three-line serial interface. The high performance PLL locks to the master clock input, generating a low jitter, highly accurate clock output without an external crystal. Input Frequency: 48MHz/24MHz/12MHz/27MHz (Selectable) Output Frequency: 27MHz – 50MHz by 1MHz step, 33.75MHz/40.5MHz/49.5MHz (Selectable) Low Jitter Performance: 15 ps (Typ.) Period 1s Low Current Consumption: 3.5mA (Typ.) at 27MHz, 3.0V 4.5mA (Typ.) at 50MHz, 3.0V Output Load: 15pF(Max) Supply Voltage: 2.7 – 3.6V Operating Temperature Range: -20 to +85℃ Package: 8-pin USON Applications · · Digital Still Camera Digital Video Camera Block Diagram VDD CLKIN INPUT Buffer PLL VSS OUTPUT Buffer CLKOUT OE Register XLAT SCLK SDATA AK8141 Register Programmable Clock Generator MS0607-E-00 May-08 1 The brand name of AKEMD’s IC’s AK8141 PIN DESCRIPTION Package: 8-Pin USON ( Top View) Pin No. Pin Name Pin Type 1 OE IN 2 3 VDD VSS --- 4 CLKOUT OUT 5 SDATA 6 SCLK IN IN 7 XLAT IN 8 CLKIN IN Description CLKOUT output enable control “L”: CLKOUT=”L” and power down. “H”: active Power supply Ground Clock output Output clock frequency is selectable to 27.0MHz or 50.0MHz by 1MHz step, or 33.75MHz, 40.5MHz, 49.5MHz through the three-line serial interface. In power down mode (OE = “L”), this pin is “L”. Serial data input Serial clock input Serial write control 8-bits serial data is stored at the rising edge of this input. Set “H” except during serial write process Clock input Input frequency is selected from 48MHz, 24MHz, 12MHz or 27MHz via the serial interface. Place the AK8141 in power down (OE = “L”) mode when an input clock is not supplied. Unstable input to the CLKIN causes the unstable CLKOUT signal. DC input to the CLKIN also causes the unstable CLKOUT signal. (1) (1) (1) Internal pull down 100kW (Typ.) Ordering Information Part Number Marking Shipping Packaging Package Temperature Range AK8141U 8141 Tape and Reel 8-pin USON -20 to 85 ℃ May-08 MS0607-E-00 -2- The brand name of AKEMD’s IC’s AK8141 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. AKEMD recommends that this device is handled with appropriate precautions. Recommended Operation Conditions Parameter Operating Temperature Supply Voltage Input Clock Frequency Symbol Conditions Ta -20 VDD 2.7 Fin Cp1 Typ 3.0 Max Unit 85 °C 3.6 V 48.0 24.0 12.0 27.0 50 Input Clock Duty Cycle Output Load Capacitance Min Pin: CLKOUT MS0607-E-00 MHz % 15 pF May-08 -3- The brand name of AKEMD’s IC’s AK8141 DC Characteristics All specifications at VDD: over 2.7 to 3.6V, Ta: -20 to +85℃, unless otherwise noted Parameter Symbol Conditions Min Typ High level input voltage VIH Pin: CLKIN, OE, XLAT, SCLK, SDATA 0.7*VDD Low level input voltage VIL Same as above Input leakage current 1 IL 1 Pin: CLKIN, SCLK, SDATA Input leakage current 2 IL 2 Input leakage current 3 IL 3 High level output voltage VOH Low level output voltage VOL Current Consumption1 IDD1 Max Unit V 0.3*VDD V -10 +10 µA OE -10 +75 µA XLAT -75 +10 µA CLKOUT IOH= -4mA (VDD=3.0V, Ta=25°C) CLKOUT IOL = +4mA (VDD=3.0V, Ta=25°C) No load 0.8*VDD V 0.2*VDD CLKIN=48MHz CLKOUT=27MHz V 3.5 mA 4.5 mA (VDD=3.0V, Ta=25℃) No load Current Consumption2 CLKIN=48MHz IDD2 CLKOUT=50MHz (VDD=3.0V, Ta=25℃) Power down current OE=”L” Ipd 0 FSEL=”L” or open 10 μA AC Characteristics All specifications at VDD: over 2.7 to 3.6V, Ta: -20 to +85℃, unless otherwise noted Parameter Symbol Conditions Output Clock Duty Cycle(2) (3) (2) (3) Output Clock Rise Time MIN TYP MAX Unit 45 50 55 % trise 0.2VDD to 0.8VDD 4.0 ns Output Clock Fall Time tfall 0.2VDD to 0.8VDD 4.0 ns Output Clock Jitter (2) (3) Jit Period, 1s tlock Power-up (2) (3) (1) Output Lock Time 15 ps 1 ms (1) The time that output reaches the target frequency within accuracy of ±0.1% from the point that the power supply reaches VDD (2) With the load capacitance specified by the recommended operation conditions (3) Design value May-08 MS0607-E-00 -4- The brand name of AKEMD’s IC’s AK8141 Serial Interface t3 SDATA t4 D0 t1 D1 A6 A7 t2 SCLK t6 t5 t7 XLAT Note) It might cause a write access if SCLK rise while XLAT stay at “Low”. Symbol Parameter Min Typ Max Unit t1,t2 SCLK pulse width 50 ns t3 SDATA setup time 50 ns t4 SDATA hold time 50 ns t5 SCLK rising edge to XLAT falling edge 50 ns t6 XLAT pulse width 50 ns t7 XLAT rising edge to SCLK falling edge 50 ns MS0607-E-00 May-08 -5- The brand name of AKEMD’s IC’s AK8141 Package Information · Mechanical data (Units:mm) · Marking a: #1 Pin Index b: Part number c: Date code (3 digits) AKM and the logo - are the brand of AKEMD’s IC’s and identify that AKEMD continues to offer the best choice for high performance mixed-signal solution under this brand. · 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. May-08 MS0607-E-00 -6- The brand name of AKEMD’s IC’s AK8141 Functional Description Register map AK8141 has one 8-bit register. The register map is shown below. Address Data A[7:0] D7 D6 D5 D4 D3 D2 D1 D0 FFh INFRQ1 INFRQ0 0 OUTFRQ4 OUTFRQ3 OUTFRQ2 OUTFRQ1 OUTFRQ0 Note) D5 should be set to “0”. Register setting The data for the register is set via the serial interface such as SCLK pin, SDATA pin and XLAT pin. It is recommended that the register access is executed while OE pin = ”L”. Important It must be set the appropriate data to the register as the procedure shown below after power up. The AK8141 does not have a reset function on the register. <Register setting procedure after power up> 1) Power up with OE=”L”. 2) Set values to the register. 3) Set OE=”H”. Register bit Function INFRQ1-0 [Write] Input clock frequency is configured with these bits. INFRQ1 INFRQ0 Input frequency 0 0 48MHz 0 1 24MHz 1 0 12MHz 1 1 27MHz MS0607-E-00 May-08 -7- The brand name of AKEMD’s IC’s AK8141 OUTFRQ4-0 [Write] Output clock frequency is configured with these bits. OUTFRQ4 OUTFRQ3 OUTFRQ2 OUTFRQ1 OUTFRQ0 CLKOUT 0 0 0 0 0 27.00MHz 0 0 0 0 1 28.00MHz 0 0 0 1 0 29.00MHz 0 0 0 1 1 30.00MHz 0 0 1 0 0 31.00MHz 0 0 1 0 1 32.00MHz 0 0 1 1 0 33.00MHz 0 0 1 1 1 33.75MHz 0 1 0 0 0 34.00MHz 0 1 0 0 1 35.00MHz 0 1 0 1 0 36.00MHz 0 1 0 1 1 37.00MHz 0 1 1 0 0 38.00MHz 0 1 1 0 1 39.00MHz 0 1 1 1 0 40.00MHz 0 1 1 1 1 40.50MHz 1 0 0 0 0 41.00MHz 1 0 0 0 1 42.00MHz 1 0 0 1 0 43.00MHz 1 0 0 1 1 44.00MHz 1 0 1 0 0 45.00MHz 1 0 1 0 1 46.00MHz 1 0 1 1 0 47.00MHz 1 0 1 1 1 48.00MHz 1 1 0 0 0 49.00MHz 1 1 0 0 1 49.50MHz 1 1 0 1 0 50.00MHz 1 1 0 1 1 (*1) 1 1 1 0 0 (*1) 1 1 1 0 1 (*1) 1 1 1 1 0 (*1) 1 1 1 1 1 (*1) (*1) 40.5MHz May-08 MS0607-E-00 -8- The brand name of AKEMD’s IC’s AK8141 IMPORTANT NOTICE · These products and their specifications are subject to change without notice. Before considering any use or application, consult the Asahi Kasei Microsystems Co., LTD. 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As used here: (a) A hazard related device or system is one designed or intended for life support or maintenance of safety or for application 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. (b) 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. · It is the responsibility of the buyer or distributor of an AKM product who distributes, disposes of, or otherwise places the product with a third party to notify that 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. MS0607-E-00 May-08 -9-