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74HC297 Datasheet(PDF) 4 Page - NXP Semiconductors |
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74HC297 Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 12 page September 1993 4 Philips Semiconductors Product specification Digital phase-locked-loop filter 74HC/HCT297 PIN DESCRIPTION PIN NO. SYMBOL NAME AND FUNCTION 2, 1, 15, 14 A, B, C, D modulo control inputs 3ENCTR K-counter enable input 4KCP K-counter clock input (LOW-to-HIGH, edge-triggered) 5 I/DCP increment/decrement clock input (HIGH-to-LOW, edge-triggered) 6D/U down/up control 7 I/DOUT increment/decrement bus output 8 GND ground (0 V) 9, 10, 13 φA1, φB, φA2 phase inputs 11 XORPDOUT EXCLUSIVE-OR phase detector output 12 ECPDOUT edge-controlled phase detector output 16 VCC positive supply voltage Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol. |
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