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74LV123DB Arkusz danych(PDF) 11 Page - NXP Semiconductors

Numer części 74LV123DB
Szczegółowy opis  Dual retriggerable monostable multivibrator with reset
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74LV123DB Arkusz danych(HTML) 11 Page - NXP Semiconductors

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74LV123_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 8 November 2007
11 of 23
NXP Semiconductors
74LV123
Dual retriggerable monostable multivibrator with reset
[1]
All typical values are measured at Tamb = 25 °C and nominal supply values (VCC = 3.3 V and 5.0 V).
[2]
tpd is the same as tPLH and tPHL; CEXT = 0 pF; REXT =5 kΩ.
[3]
For other REXT and CEXT combinations see Figure 11 and Section 12.1.1 “Basic timing”.
[4]
CEXT has no limits.
[5]
CPD is used to determine the dynamic power dissipation (PD in µW).
PD =CPD × VCC2 × fi × N+ Σ(CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
Σ(CL × VCC2 × fo) = sum of the outputs.
Outputs; nQ = LOW and nQ = HIGH, see Figure 7
tW
pulse width
CEXT = 100 nF; REXT = 10 kΩ
VCC = 2.0 V
-
470
-
-
-
ns
VCC = 2.7 V
-
460
-
-
-
ns
VCC = 3.0 V to 3.6 V
-
450
-
-
-
ns
VCC = 4.5 V to 5.5 V
-
430
-
-
-
ns
CEXT = 0 pF; REXT = 5 kΩ
VCC = 2.0 V
-
100
-
-
-
ns
VCC = 2.7 V
-
90
-
-
-
ns
VCC = 3.0 V to 3.6 V
-
80
-
-
-
ns
VCC = 4.5 V to 5.5 V
-
70
-
-
-
ns
External components
REXT
external
resistance
see Figure 11
[3]
VCC = 1.2 V
10
-
1000
-
-
k
VCC = 2.0 V
5
-
1000
-
-
k
VCC = 2.7 V
3
-
1000
-
-
k
VCC = 3.0 V to 3.6 V
2
-
1000
-
-
k
VCC = 4.5 V to 5.5 V
2
-
1000
-
-
k
CEXT
external
capacitance
see Figure 11
[3][4]
VCC = 1.2 V
-
-
-
-
-
pF
VCC = 2.0 V
-
-
-
-
-
pF
VCC = 2.7 V
-
-
-
-
-
pF
VCC = 3.0 V to 3.6 V
-
-
-
-
-
pF
VCC = 4.5 V to 5.5 V
-
-
-
-
-
pF
Dynamic power dissipation
CPD
power dissipation
capacitance
VCC = 3.3 V; VI = GND to VCC
[5]
-60-
-
-
pF
Table 7.
Dynamic characteristics …continued
GND = 0 V; tr =tf ≤ 2.5 ns; for test circuit see Figure 8.
Symbol Parameter
Conditions
−40 °C to +85 °C
−40 °C to +125 °C Unit
Min
Typ[1] Max
Min
Max


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