R
Austria Mikro Systeme International
DFF2
CUB
0.6 碌m CMOS
DFF2 is a fast, static, master-slave D flip-flop with 2x drive strength. SET and RESET
are asynchronous and active low.
Truth Table
SN RN
L
H
H
H
H
L
H
L
H
H
H
L
D
X
X
H
L
X
X
C
Q
QN
Capacitance
Ci (pF)
X
H
L
X
L
H
脡
H
L
脡
L
H
脢
no change
X
illegal
D
SN
Q
DFF2
C
RN
QN
D
C
SN
RN
0.020
0.020
0.034
0.041
Area
2.30 mils
2
Power
7.19 碌W / MHz
Delay [ns] = tpd.. = f(SL, L)
Output Slope [ns] = op_sl.. = f(L)
AC Characteristics :
Tj = 25擄C
with SL = Input Slope [ns] ; L = Output Load [pF]
with L = Output Load [pF]
Typical Process
VDD = 3.3V
AC Characteristics
Characteristics
Symbol
tpdcqr
tpdcqf
tpdcqnr
tpdcqnf
tpdsnq
tpdsnqn
tpdrnq
tpdrnqn
op_slcqr
op_slcqf
op_slcqnr
op_slcqnf
op_slsnq
op_slsnqn
op_slrnq
op_slrnqn
SL = 0.1
L = 0.2
L = 1.4
L = 2.0
L = 0.2
SL = 2.0
L = 1.4
L = 2.0
Delay C to Q
Delay C to QN
Delay SN to Q
Delay SN to QN
Delay RN to Q
Delay RN to QN
Output Slope C to Q
Output Slope C to QN
Output Slope SN to Q
Output Slope SN to QN
Output Slope RN to Q
Output Slope RN to QN
0.88
0.80
1.20
1.18
0.88
1.18
2.15
0.95
0.67
0.60
0.71
0.58
0.73
0.60
0.66
0.70
1.84
1.71
2.14
2.09
1.83
2.07
3.04
1.88
3.51
2.85
3.55
2.93
3.70
2.88
3.05
3.48
2.29
2.15
2.65
2.54
2.32
2.50
3.49
2.33
5.01
4.25
5.08
4.03
5.11
4.08
4.13
5.12
1.04
0.96
1.37
1.35
1.20
1.50
2.34
1.27
0.67
0.61
0.71
0.56
0.71
0.58
0.65
0.70
2.00
1.88
2.31
2.25
2.18
2.40
3.25
2.22
3.53
3.00
3.60
2.93
3.63
2.91
2.95
3.58
2.46
2.31
2.82
2.70
2.65
2.83
3.67
2.67
5.03
4.08
5.00
4.03
5.25
4.12
4.06
5.11
Sept. 1996
- 132 -
Rev. N/C
1
2
