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Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
SWITCHING CHARACTERISTICS*
Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
Characteristic
Output Rise Time
t TLH = (0.40 ns/pF) C L + 20 ns
t TLH = (0.25 ns/pF) C L + 17.5 ns
t TLH = (0.20 ns/pF) C L + 15 ns
Output Fall Time
t THL = (1.5 ns/pF) C L + 50 ns
t THL = (0.75 ns/pF) C L + 37.5 ns
t THL = (0.55 ns/pF) C L + 37.5 ns
Data Propagation Delay Time
t PLH = (0.40 ns/pF) C L + 620 ns
t PLH = (0.25 ns/pF) C L + 237.5 ns
t PLH = (0.20 ns/pF) C L + 165 ns
t PHL = (1.3 ns/pF) C L + 655 ns
t PHL = (0.60 ns/pF) C L + 260 ns
t PHL = (0.35 ns/pF) C L + 182.5 ns
Blank Propagation Delay Time
t PLH = (0.30 ns/pF) C L + 585 ns
t PLH = (0.25 ns/pF) C L + 187.5 ns
t PLH = (0.15 ns/pF) C L + 142.5 ns
t PHL = (0.85 ns/pF) C L + 442.5 ns
t PHL = (0.45 ns/pF) C L + 177.5 ns
t PHL = (0.35 ns/pF) C L + 142.5 ns
Lamp Test Propagation Delay Time
t PLH = (0.45 ns/pF) C L + 290.5 ns
t PLH = (0.25 ns/pF) C L + 112.5 ns
t PLH = (0.20 ns/pF) C L + 80 ns
t PHL = (1.3 ns/pF) C L + 248 ns
t PHL = (0.45 ns/pF) C L + 102.5 ns
t PHL = (0.35 ns/pF) C L + 72.5 ns
Setup Time
Hold Time
Latch Enable Pulse Width
* The formulas given are for the typical characteristics only.
This device contains protection circuitry to protect the inputs against damage due to high static voltages or electric fields; how-
ever, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this
high-impedance circuit. A destructive high current mode may occur if V in and V out are not constrained to the range V SS (V in or
V out )
V DD .
Due to the sourcing capability of this circuit, damage can occur to the device if V DD is applied, and the outputs are shorted to
V SS and are at a logical 1 (See Maximum Ratings).
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either V SS or V DD ).
MC14511B
6–258
(C L = 50 pF, T A = 25 _ C)
Symbol
t TLH
t THL
t PLH
t PHL
t PLH
t PHL
t PLH
t PHL
t su
t h
t WL
V DD
Vdc
Min
Typ
5.0
—
40
10
—
30
15
—
25
5.0
—
125
10
—
75
15
—
65
5.0
—
640
10
—
250
15
—
175
5.0
—
720
10
—
290
15
—
200
5.0
—
600
I0
—
200
15
—
150
5.0
—
485
10
—
200
15
—
160
5.0
—
313
10
—
125
15
—
90
5.0
—
313
10
—
125
15
—
90
5.0
100
—
10
40
—
15
30
—
5.0
60
—
10
40
—
15
30
—
5.0
520
260
10
220
110
15
130
65
MOTOROLA CMOS LOGIC DATA
Max
Unit
ns
80
60
50
ns
250
150
130
ns
1280
500
350
1440
580
400
ns
750
300
220
970
400
320
ns
625
250
180
625
250
180
—
ns
—
—
—
ns
—
—
—
ns
—
—
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