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74HC191DB Datasheet(PDF) 13 Page - NXP Semiconductors

Part # 74HC191DB
Description  Presettable synchronous 4-bit binary up/down counter
PDF  14 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC191DB Datasheet(HTML) 13 Page - NXP Semiconductors

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December 1990
13
Philips Semiconductors
Product specification
Presettable synchronous 4-bit binary
up/down counter
74HC/HCT191
Fig.13 Waveforms showing the input (PL) to output (Qn) propagation delays.
(1) HC : VM = 50%; VI = GND to VCC.
HCT : VM = 1.3 V; VI = GND to 3 V.
Fig.14 Waveforms showing the up/down count input (U/D) to terminal count and ripple clock output (TC, RC)
propagation delays.
(1) HC : VM = 50%; VI = GND to VCC.
HCT : VM = 1.3 V; VI = GND to 3 V.
Fig.15 Waveforms showing the parallel load input (PL) pulse width, removal time to clock (CP) and the output
(Qn) transition times.
(1) HC : VM = 50%; VI = GND to VCC.
HCT : VM = 1.3 V; VI = GND to 3 V.



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