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| 74HC123D.653 Datasheet, PDF (9/25 Pages) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset | |||
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NXP Semiconductors
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Table 7. Dynamic characteristics â¦continued
Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 12.
Symbol Parameter Conditions
25 ï°C
ï40 ï°C to +85 ï°C ï40 ï°C to +125 ï°C Unit
Min Typ Max Min Max Min Max
trtrig
retrigger time nA, nB; CEXT = 0 pF;
[3][4] - 110 -
-
-
-
- ns
REXT = 5 kï; VCC = 5.0 V;
see Figure 10
REXT
external timing see Figure 7
resistor
VCC = 2.0 V
10 - 1000 -
-
-
- kï
VCC = 5.0 V
2
- 1000 -
-
-
- kï
CEXT external timing VCC = 5.0 V; see Figure 7 [4] -
-
-
-
-
-
- pF
capacitor
CPD
power
per monostable;
dissipation
VI = GND to VCC
capacitance
[5] -
54
-
-
-
-
- pF
74HCT123
tPHL
HIGH to LOW nRD, nA, nB to nQ or nQ;
propagation CEXT = 0 pF; REXT =
delay
5 kï; see Figure 9
VCC = 4.5 V
VCC = 5 V; CL = 15 pF
nRD (reset) to nQ or nQ;
CEXT = 0 pF;
REXT = 5 kï;
see Figure 9
- 30 51
-
64
-
77 ns
- 26 -
-
-
-
- ns
VCC = 4.5 V
VCC = 5 V; CL = 15 pF
tPLH
LOW to HIGH nRD, nA, nB to nQ or nQ;
propagation CEXT = 0 pF;
delay
REXT = 5 kï;
see Figure 9
- 27 46
-
58
-
69 ns
- 23 -
-
-
-
- ns
VCC = 4.5 V
VCC = 5 V; CL = 15 pF
nRD (reset) to nQ or nQ;
CEXT = 0 pF; REXT =
5 kï; see Figure 9
- 28 51
-
64
-
77 ns
- 26 -
-
-
-
- ns
VCC = 4.5 V
- 23 46
-
58
-
69 ns
VCC = 5 V; CL = 15 pF
- 23 -
-
-
-
- ns
tt
transition time VCC = 4.5 V; see Figure 9 [1] -
7 15
-
19
-
22 ns
74HC_HCT123
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 â 16 December 2011
© NXP B.V. 2011. All rights reserved.
9 of 25
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