74HC401 View Datasheet(PDF) - Philips Electronics
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74HC401 Datasheet PDF : 11 Pages
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Philips Semiconductors
8-bit synchronous BCD down counter
AC WAVEFORMS
Product speciļ¬cation
74HC/HCT40102
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.7
Waveforms showing the clock input (CP) to
TC propagation delays, the clock pulse
width, the output transition times and the
maximum clock pulse frequency.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.8 Waveforms showing the TE to
TC propagation delays.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.9 Waveforms showing PL, MR, Pn to
TC propagation delays.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.10 Waveforms showing removal time for
MR and PL.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.11 Waveforms showing hold and set-up times
for MR or PE to CP.
The shaded areas indicate when the input is permitted to
change for predictable output performance.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.12 Waveforms showing hold and set-up times
for Pn, PE to CP.
December 1990
10
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