74HCT423BQ,115 NXP Semiconductors, 74HCT423BQ,115 Datasheet - Page 14

• Manufacturer Part Number: 74HCT423BQ,115
• Description: IC DUAL RETRIG MULTVIB 16DHVQFN
• Manufacturer: NXP Semiconductors
• Series: 74HCTr

Specifications of 74HCT423BQ,115

• Logic Type: Monostable
• Independent Circuits: 2
• Schmitt Trigger Input: Yes
• Propagation Delay: 22ns
• Current - Output High, Low: 4mA, 4mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-VQFN Exposed Pad, 16-HVQFN, 16-SQFN, 16-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 74HCT423BQ-G; 74HCT423BQ-G; 935285426115

NXP Semiconductors
12. Application information
74HC_HCT423
Product data sheet
Fig 13. Timing component connections
(1) For minimum noise generation it is recommended that the nCEXT pins (6, 14) are connected to ground externally to
the GND pin (8).
12.1.1 Minimum monostable pulse width
12.1 Timing component connections
12.2 Power-up considerations
The basic output pulse width is essentially determined by the values of the external timing
components R
To set the minimum pulse width, when C
when C
t
t
R
C
When the monostable is powered-up it may produce an output pulse, with a pulse width
defined by the values of R
circuit shown in
W
W
EXT
EXT
= 0.45 × R
= pulse width in μs;
= external resistor in kΩ;
= external capacitor in nF.
EXT
> 10 nF, the output pulse width is defined as:
nA
nB
EXT
EXT
All information provided in this document is subject to legal disclaimers.
Figure
× C
and C
1 (9)
2 (10)
EXT
14.
Rev. 4 — 18 March 2011
EXT
(typ.), where:
423
EXT
8
GND
.
and C
(1)
Dual retriggerable monostable multivibrator with reset
nCEXT
14 (6)
C EXT
EXT
3 (11)
nRD
, this output pulse can be eliminated using the
EXT
15 (7)
001aah917
nREXT/CEXT
R EXT
13 (5)
4 (12)
< 10 nF, see
74HC423; 74HCT423
V
CC
nQ
nQ
Figure 8
and
© NXP B.V. 2011. All rights reserved.
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