74LV123BQ 查看數據表（PDF） - NXP Semiconductors.
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74LV123BQ Datasheet PDF : 24 Pages
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NXP Semiconductors
74LV123
Dual retriggerable monostable multivibrator with reset
Table 7. Dynamic characteristics …continued
GND = 0 V; tr = tf 2.5 ns; for test circuit see Figure 8.
Symbol Parameter
Conditions
Outputs; nQ = LOW and nQ = HIGH, see Figure 7
tW
pulse width
External components
CEXT = 100 nF; REXT = 10 k
VCC = 2.0 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
CEXT = 0 pF; REXT = 5 k
VCC = 2.0 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
REXT
external
resistance
see Figure 11
VCC = 1.2 V
VCC = 2.0 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
CEXT
external
capacitance
see Figure 11
VCC = 1.2 V
VCC = 2.0 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
Dynamic power dissipation
CPD
power dissipation VCC = 3.3 V; VI = GND to VCC
capacitance
40 C to +85 C 40 C to +125 C Unit
Min Typ[1] Max Min
Max
- 470 -
-
- 460 -
-
- 450 -
-
- 430 -
-
- 100 -
-
- 90 -
-
- 80 -
-
- 70 -
-
[3]
10 - 1000 -
5
- 1000
-
3
- 1000
-
2
- 1000
-
2
- 1000
-
[3][4]
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[5] -
60
-
-
- ns
- ns
- ns
- ns
- ns
- ns
- ns
- ns
- k
- k
- k
- k
- k
- pF
- pF
- pF
- pF
- pF
- pF
[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 k.
[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 W).
PD = CPD VCC2 fi N + (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;
(CL VCC2 fo) = sum of the outputs.
74LV123
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 7 — 12 December 2011
© NXP B.V. 2011. All rights reserved.
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