74HC6323A Datasheet, PDF (14/15 Pages) NXP Semiconductors – Programmable ripple counter with oscillator; 3-state

Philips Semiconductors
Programmable ripple counter with
oscillator; 3-state
Product specification
74HC/HCT6323A
handbook, halfpage
MR (from logic)
7 ^X1
X2
6
R _bias
100 kΩ to 1
MΩ
R2
2.2
kΩ
C1
22 to
37 pF
C2 100 pF
MBA328 - 1
Above 5 MHz replace R2 by a capacitor of
half the value of C2.
C_L at which a crystal is specified (or adjusted)
equals for this application C1 . C2/C1 + C2.
Fig.13 Typical setup for a crystal oscillator
operating in the fundamental mode
(1 MHz to 25 MHz).
handbook, halfpage
MR (from logic)
7 ^X1
X2
6
R _bias
3 kΩ
1 to 10 pF
C1
(optional)
MBA329 - 1
Applicable for third overtone crystals (lower
damping resistance at the third harmonic
frequency) at typical 50 MHz. For lower
frequencies extra load capacitors must be
supplied, or increase bias resistor.
Fig.14 Typical set-up for a crystal oscillator
operating in the third overtone mode without
the use of an inductor.
September 1993
14