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74HC297 Fiches technique(PDF) 4 Page - NXP Semiconductors

No de pièce 74HC297
Description  Digital phase-locked-loop filter
Download  12 Pages
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC297 Fiches technique(HTML) 4 Page - NXP Semiconductors

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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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