Circuitos Integrados

7474
Dual D-type flip-flop with set and reset; positive-edge trigger
PDF datasheet
       
1R D 1  • 14 Vcc
1D 2 13 2R D
1CP 3 12 2D
1S D 4 11 2CP
1Q 5 10 2S D
1Q 6 9 2Q
GND 7 8 2Q
       
Pin Symbol Description
1 1R D asynchronous reset-direct input (active low)
2 1D data input
3 1CP clock input (low-to-high edge-triggered)
4 1S D asynchronous set-direct input (active low)
5 1Q true output
6 1Q complement output
7 GND ground
8 2Q complement output
9 2Q true output
10 2S D asynchronous set-direct input (active low)
11 2CP clock input (low-to-high edge-triggered)
12 2D data input
13 2R D asynchronous reset-direct input (active low)
14 Vcc supply voltage


Specifications
(typical values under recommended operating conditions, unless specified)
Parameter Value Unit
Propagation delay, nCP to nQ, nQ 14 (74HC)
15 (74HCT)
ns
Propagation delay, nS D to nQ, nQ 15 (74HC)
18 (74HCT)
ns
Propagation delay, nR D to nQ, nQ 16 (74HC)
18 (74HCT)
ns
Maximum clock frequency 76 (74HC)
59 (74HCT)
MHz

Note
Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information.

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