Philips Semiconductors
Dual D-type flip-flop
Product specification
74ABT74
FUNCTION TABLE
INPUTS
SD RD CP D
LHXX
HLXX
L LXX
HH↑ h
HH↑
l
HH ↑ X
OUTPUTS
QQ
HL
LH
HH
HL
LH
NC NC
OPERATING
MODE
Asynchronous set
Asynchronous
reset
Undetermined*
Load “1”
Load “0”
Hold
NOTES:
H = High voltage level
h = High voltage level one setup time prior to low-to-high
clock transition
L = Low voltage level
l = Low voltage level one setup time prior to low-to-high
clock transition
NC= No change from the previous setup
X = Don’t care
↑ = Low-to-high clock transition
↑ = Not low-to-high clock transition
* = This setup is unstable and will change when either set
or reset return to the high level.
ABSOLUTE MAXIMUM RATINGS1, 2
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
VCC DC supply voltage
–0.5 to +7.0
V
IIK DC input diode current
VI DC input voltage3
VI < 0
–18
–1.2 to +7.0
mA
V
IOK DC output diode current
VO < 0
–50 mA
VOUT
DC output voltage3
output in Off or High state
–0.5 to +5.5
V
IOUT
DC output current
output in Low state
40 mA
Tstg Storage temperature range
–65 to 150
°C
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
VCC
VI
VIH
VIL
IOH
IOL
∆t/∆v
Tamb
DC supply voltage
Input voltage
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature range
LIMITS
MIN MAX
4.5 5.5
0 VCC
2.0
0.8
–15
20
0 10
–40 +85
UNIT
V
V
V
V
mA
mA
ns/V
°C
1995 Sep 22
2
