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| ML12038 1.1 GHz Low Power Dual Modulus Prescaler Legacy Device: Motorola MC12038A The ML12038 can be used with CMOS synthesizers requiring positive edges to trigger internal counters such as Lansdale's ML145xxx series in a PLL to provide tuning signals up to 1.1 GHz in programmable frequency steps. A Divide Ratio Control (SW) permits selection of a 127/128 or 255/256 divide ratio as desired. The Modulus Control (MC) selects the proper divide number after SW has been biased to select the desired divide ratio. * * * * * * 1.1 GHz Toggle Frequency Supply Voltage 4.5 to 5.5 V Low Power 4.8 mA Typical Operating Temperature Range TA = -40 to +85C Short Set Up Time (tset) 16ns Maximum @ 1.1 GHz Modulus Control Input Level is Compatible With Standard CMOS and TTL * On-Chip Output Termination ML12038AP ML12038AD ML12038PP ML12038-5P Note: Lansdale lead free (Pb) product, as it becomes available, will be identified by a part number prefix change from ML to MLE. 127 128 255 256 Criteria Page 1 of 5 www.lansdale.com Issue 0 ML12038 LANSDALE Semiconductor, Inc. 0.1 at 5.0 Vdc 1.4 4.8 1.1 6.5 8.0 11 1100 100-250 MHz (min) 400 1500 16 500 mv (/128, 1.1 Ghz Input Frequency, VCC = 5.0 V, TA = 25C output Loaded) Page 2 of 5 www.lansdale.com Issue 0 ML12038 LANSDALE Semiconductor, Inc. Figure 4. AC Test Circuit V CC 4.5 TO 5.5 Vdc C3 Sine Wave Generator C1 50 C2 IN MC GND IN OUT CL EXTERNAL COMPONENTS C1 = C2 = 1000 pF C3 = 0.1 F C L = 8.0 pF (Including Scope and jig capacitance) V CC SW MC Input Figure 5. Input Signal Amplitude versus Input Frequency +15.0 +10.0 +5.0 0 -5.0 AMPLITUDE (dbm) -10.0 -15.0 -20.0 -25.0 -30.0 -35.0 -40.0 -45.0 -50.0 0 250 500 750 FREQUENCY (MHz) Divide Ratio = 128; VCC = 5.0 V; TA = 25C 1000 1250 +1250 +710 +400 +225 +125 +71.0 mVrms mVpp +40.0 +22.5 +12.8 +7.1 +4.0 +2.25 +1.25 +0.71 1500 Figure 6. Output Amplitude versus Input Frequency 5000 4000 3000 2000 1000 0 1500 0 250 500 750 FREQUENCY (MHz) 1000 1250 Page 3 of 5 www.lansdale.com Issue 0 ML12038 LANSDALE Semiconductor, Inc. Figure 7. Typical Input Impedance versus Input Frequency 200 150 R 100 MHz 50 0 -50 -100 O HM S jX -500 -550 -600 -650 100 -150 -200 -250 -300 -350 -400 -450 200 300 400 500 600 700 800 900 1000 1100 1200 Frequency (MHz) Page 4 of 5 www.lansdale.com Issue 0 ML12038 LANSDALE Semiconductor, Inc. (ML12038-5P) P DIP 8 = PP PLASTIC PACKAGE (ML12038PP) CASE 626-04 Lansdale Semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Lansdale does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. "Typical" parameters which may be provided in Lansdale data sheets and/or specifications can vary in different applications, and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by the customer's technical experts. Lansdale Semiconductor is a registered trademark of Lansdale Semiconductor, Inc. Page 5 of 5 www.lansdale.com Issue 0 |
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