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MC12038A 데이터시트(PDF) 1 Page - Motorola, Inc |
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MC12038A 데이터시트(HTML) 1 Page - Motorola, Inc |
1 / 5 page MC12038A Order this document by MC12038A/D SEMICONDUCTOR TECHNICAL DATA MECL PLL COMPONENTS ÷127/128, ÷255/256 DUAL MODULUS PRESCALER P SUFFIX PLASTIC PACKAGE CASE 626 PIN CONNECTIONS D SUFFIX PLASTIC PACKAGE CASE 751 (SO–8) 8 1 1 8 IN (Top View) 8 IN VCC SW OUT NC MC Gnd 7 6 5 1 2 3 4 Device Operating Temperature Range Package ORDERING INFORMATION MC12038AD MC12038AP TA = – 40° to +85°C SO–8 Plastic 1.1 GHz Low Power Dual Modulus Prescaler The MC12038A can be used with CMOS synthesizers requiring positive edges to trigger internal counters such as Motorola’s MC145XXX 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 of 4.5 to 5.5 V • Low–Power 4.8 mA Typical • Operating Temperature Range of –40 to 85°C • Short Setup Time (tset) 16ns Maximum @ 1.1 GHz • Modulus Control Input Level Is Compatible With Standard CMOS and TTL • On–Chip Output Termination FUNCTIONAL TABLE SW MC Divide Ratio H H 127 H L 128 L H 255 L L 256 NOTES: 1. SW: H = VCC, L = Open. A logic L can also be applied by grounding this pin, but this is not recommended due to increased power consumption. 2. MC: H = 2.0 V to VCC, L = GND to 0.8 V. DESIGN GUIDE Criteria Value Unit Internal Gate Count* 67 ea Internal Gate Propagation Delay 200 ps Internal Gate Power Dissipation 0.75 mW Speed Power Product 0.15 pJ NOTE: * Equivalent to a two–input NAND gate MAXIMUM RATINGS Characteristic Symbol Range Unit Power Supply Voltage, Pin 2 VCC –0.5 to 7.0 Vdc Operating Temperature Range TA –40 to 85 °C Storage Temperature Range Tstg –65 to 150 °C Modulus Control Input, Pin 6 MC –0.5 to 6.5 Vdc NOTE: ESD data available upon request. © Motorola, Inc. 1997 Rev 2 |
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