MC14541B 查看數據表（PDF） - Motorola => Freescale
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MC14541B Datasheet PDF : 7 Pages
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ÎÎÎÎSÎÎÎÎWIÎÎÎÎTCHÎÎÎÎINGÎÎÎÎCHÎÎÎÎARÎÎÎÎAChCaÎÎÎÎTrEacRtÎÎÎÎeISriTsÎÎÎÎtIiCcSÎÎÎÎ* (CÎÎÎÎL=5ÎÎÎÎ0pFÎÎÎÎ,TAÎÎÎÎ=2ÎÎÎÎ5_CÎÎÎÎ)SymÎÎÎÎbolÎÎÎÎÎÎÎÎVÎÎÎÎDDÎÎÎÎÎÎÎÎÎÎÎÎMinÎÎÎÎÎÎÎÎTÎÎÎÎypÎÎÎÎ# ÎÎÎÎÎÎÎÎMaxÎÎÎÎÎÎÎÎUÎÎÎÎnitÎÎÎÎ
Output Rise and Fall Time
tTLH, tTHL = (1.5 ns/pF) CL + 25 ns
tTLH, tTHL = (0.75 ns/pF) CL + 12.5 ns
tTLH, tTHL = (0.55 ns/pF) CL + 9.5 ns
Propagation Delay, Clock to Q (28 Output)
tPLH, tPHL = (1.7 ns/pF) CL + 3415 ns
tPLH, tPHL = (0.66 ns/pF) CL + 1217 ns
tPLH, tPHL = (0.5 ns/pF) CL + 875 ns
Propagation Delay, Clock to Q (216 Output)
tPHL, tPLH = (1.7 ns/pF) CL + 5915 ns
tPHL, tPLH = (0.66 ns/pF) CL + 3467 ns
tPHL, tPLH = (0.5 ns/pF) CL + 2475 ns
Clock Pulse Width
tTLH,
ns
tTHL
5.0
—
100
200
10
—
50
100
15
—
40
80
tPLH
µs
tPHL
5.0
—
3.5
10.5
10
—
1.25
3.8
15
—
0.9
2.9
tPHL
µs
tPLH
5.0
—
6.0
18
10
—
3.5
10
15
—
2.5
7.5
tWH(cl)
5.0
900
300
10
300
100
15
225
85
—
ns
—
—
Clock Pulse Frequency (50% Duty Cycle)
fcl
5.0
—
1.5
0.75
MHz
10
—
4.0
2.0
15
—
6.0
3.0
MR Pulse Width
tWH(R)
5.0
900
300
10
300
100
15
225
85
—
ns
—
—
Master Reset Removal Time
trem
5.0
420
210
10
200
100
15
200
100
—
ns
—
—
* The formulas given are for the typical characteristics only at 25_C.
#Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
VDD
VDD
PULSE
GENERATOR
RS
AR
Q/Q SELECT
MODE
Q
A
CL
B
MR
VSS
(Rtc AND Ctc OUTPUTS ARE LEFT OPEN)
20 ns
20 ns
90% 50%
10%
50%
DUTY CYCLE
Figure 1. Power Dissipation Test Circuit
and Waveform
PULSE
GENERATOR
RS
AR
Q/Q SELECT
MODE
A
B
Q
CL
MR
VSS
20 ns
RS
tPLH
90% 50%
10%
50% 90%
Q
10%
tTLH
20 ns
50%
50%
tPHL
tTHL
Figure 2. Switching Time Test Circuit
and Waveforms
MOTOROLA CMOS LOGIC DATA
MC14541B
3
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