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MC44824 Datasheet(PDF) 2 Page - Motorola, Inc |
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MC44824 Datasheet(HTML) 2 Page - Motorola, Inc |
2 / 8 page MC44824/25 2 MOTOROLA ANALOG IC DEVICE DATA Representative Block Diagram This device contains 3,204 active transistors. Gnd Test Logic Buffers Latches P–On Reset I2C Bus Receiver Latches Phase Comp Ref Divider 3.2 or 4.0 MHz Osc Latch Control Program Divider 15 Bit Latches B Latches A Shift Register 15 Bit ÷8 Prescaler Preamp DTB2 POR Operational Amplifier 2.7 V DTB1 CL Data RL DTF Fout TDI Fout Fref T10, T11 T9, T12, T14 T13 T8 4 7 9 (10) 8 (9) (7) 6 (6) 14 (16) 10 (12) 5.0 V Fout Fref 13 (15) 7 (8) 4 (4) 5 (5) 11 (13) CA SDA SCL HF Input1 VCC UD PD XTAL2 B7 B4 B2 B1 DTS, EN 512/1024 1 (1) 3 (3) 12 (14) HF Input2 XTAL1 2 (2) Gnd (11) B0 MC44825 Pin Numbers ( ) PIN FUNCTION DESCRIPTION Pin Sb l Di i MC44824 MC44825 Symbol Description 1 1 PD Input of tuning voltage amplifier 2 2 XTAL1 First crystal input is the active pin at the oscillators 3 3 XTAL2 Second crystal input is the internal ground 4 4 SDA Data input 5 5 SCL Clock input of the I2C bus 6, 8, 9 – B7, B2, B1 Band buffer (open collector) outputs for up to 10 mA – 6, 7, 9, 10, 11 B7, B4, B2, B1, B0 Band buffer (open collector) outputs for up to 10 mA 7 8 CA Chip address selection pin 10 12 VCC Supply voltage, typical 5.0 V 11, 12 13, 14 HF1/HF2 Symmetric HF inputs from local oscillator 13 15 GND Ground 14 16 UD Output of the tuning voltage amplifier. Needs an external NPN with pull–up resistor to drive the varicaps |
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