Timing Requirements (input: tr = tf = 3 ns)
Characteristics
Symbol
Minimum pulse width
(CK)
Minimum set-up time
(D-CK)
Minimum set-up time
( G -CK)
Minimum hold time
tW (L)
tW (H)
ts
ts
th
TC74AC377P/F
Test Condition
⎯
⎯
⎯
⎯
Ta =
Ta =
−40 to
25°C 85°C Unit
VCC (V) Limit Limit
3.3 ± 0.3 8.0 8.0
ns
5.0 ± 0.5 5.0 5.0
3.3 ± 0.3 8.0 8.0
ns
5.0 ± 0.5 4.0 4.0
3.3 ± 0.3 9.0 9.0
ns
5.0 ± 0.5 4.0 4.0
3.3 ± 0.3 1.0 1.0
ns
5.0 ± 0.5 1.0 1.0
AC Characteristics (CL = 50 pF, RL = 500 Ω, input: tr = tf = 3 ns)
Characteristics
Symbol
Test Condition
Ta = 25°C
Ta = −40 to
85°C
Unit
VCC (V) Min Typ. Max Min Max
Propagation delay
time
tpLH
(CK-Q)
tpHL
3.3 ± 0.3 ⎯ 10.6 17.6 1.0 20.0
⎯
ns
5.0 ± 0.5 ⎯
7.4 10.6 1.0 12.0
Maximum clock
frequency
fmax
3.3 ± 0.3 50
95
⎯
50
⎯
⎯
MHz
5.0 ± 0.5 80 140 ⎯
80
⎯
Input capacitance
CIN
⎯
⎯
5
10
⎯
10
pF
Power dissipation
capacitance
CPD
(Note)
⎯
⎯
30
⎯
⎯
⎯
pF
Note:
CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
ICC (opr) = CPD・VCC・fIN + ICC/8 (per F/F)
And the total CPD when n pcs. of flip flop operate can be gained by the following equation:
CPD (total) = 20 + 10・n
5
2007-10-01