Datasheet
74HC_HCT74 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 4 — 27 August 2012 3 of 21
NXP Semiconductors
74HC74; 74HCT74
Dual D-type flip-flop with set and reset; positive edge-trigger
5. Pinning information
5.1 Pinning
5.2 Pin description
(1) This is not a supply pin. The substrate is attached to
this pad using conductive die attach material. There
is no electrical or mechanical requirement to solder
this pad. However, if it is soldered, the solder land
should remain floating or be connected to GND.
Fig 5. Pin configuration for DIP14, SO14 and (T)SSOP14 Fig 6. Pin configuration for DHVQFN14
+&
+&7
5' 9
&&
'
5'
&3 '
6' &3
4
6'
4
4
*1' 4
DDD
DDD
+&
+&7
7UDQVSDUHQWWRSYLHZ
4 4
4 6'
6' &3
&3 '
' 5'
*1'
*1'
4
5'
9
&&
WHUPLQDO
LQGH[DUHD
Table 2. Pin description
Symbol Pin Description
1R
D 1 asynchronous reset-direct input (active LOW)
1D 2 data input
1CP 3 clock input (LOW-to-HIGH, edge-triggered)
1S
D 4 asynchronous set-direct input (active LOW)
1Q 5 output
1Q
6 complement output
GND 7 ground (0 V)
2Q
8 complement output
2Q 9 output
2S
D 10 asynchronous set-direct input (active LOW)
2CP 11 clock input (LOW-to-HIGH, edge-triggered)
2D 12 data input
2R
D 13 asynchronous reset-direct input (active LOW)
V
CC
14 supply voltage