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參數資料
| 型號： | 74LV423DB |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 諧振器 |
| 英文描述： | Dual retriggerable monostable multivibrator with reset |
| 中文描述： | LV/LV-A/LVX/H SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16 |
| 封裝： | PLASTIC, SSOP2-16 |
| 文件頁數： | 2/16頁 |
| 文件大?。?/td> | 156K |
| 代理商： | 74LV423DB |
Philips Semiconductors
Preliminary specification
74LV423
Dual retriggerable monostable multivibrator
with reset
2
1997 Feb 04
853–1913 17724
FEATURES
Optimized for Low Voltage applications: 1.0 to 5.5V
Accepts TTL input levels between V
CC
= 2.7V and V
CC
= 3.6V
Typical V
OLP
(output ground bounce)
T
amb
= 25
°
C
Typical V
OHV
(output V
OH
undershoot)
T
amb
= 25
°
C
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100% duty factor
Direct reset terminates output pulses
Schmitt-trigger action on all inputs except for the reset input
Output capability: standard (except for nR
EXT
/C
EXT
)
I
CC
category: MSI
0.8V @ V
CC
= 3.3V,
2V @ V
CC
= 3.3V,
DESCRIPTION
The 74LV423 is a low-voltage Si-gate CMOS device and is pin and
function compatible with the 74HC/HCT423.
The 74LV423 is a dual retriggerable monostable multivibrator with
output pulse width control by three methods. The basic pulse time is
programmed by selection of an external resistor (R
EXT
) and
capacitor (C
EXT
). They are normally connected as shown in
Figure 1. Once triggered, the basic output pulse width may be
extended by retriggering the gated active LOW-going edge input
(nA) or the active HIGH-going edge input (nB). By repeating this
process, the output pulse period (nQ = HIGH, nQ = LOW) can be
made as long as desired. Alternatively, an output delay can be
terminated at any time by a LOW-going edge on input nR
D
, which
also inhibits the triggering. Figures 2 and 3 illustrate pulse control by
retriggering and early reset. The basic output pulse width is
essentially determined by the values of the external timing
components R
EXT
and C
EXT
. For pulse width when C
EXT
<10000pF,
see Figure 6. When C
EXT
10,000pF, the typical output pulse
width is defined as:
t
W
= 0.45
R
EXT
t
W
= pulse width in ns; R
EXT
= external resistor in K
; and
C
EXT
= external capacitor in pF. Schmitt-trigger action in the nA and
nB inputs makes the circuit highly tolerant of slower input rise and
fall times.
C
EXT
(typ.), where
QUICK REFERENCE DATA
GND = 0V; T
amb
= 25
°
C; t
r
= t
f
SYMBOL
2.5 ns
PARAMETER
CONDITIONS
TYPICAL
UNIT
t
PHL
/t
PLH
Propagation delay
nA, nB to nQ, nQ
nR
D
to nQ, nQ
Input capacitance
C
L
= 15pF
V
CC
= 3.3V
R
EXT
= 5K
C
EXT
= 0pF
16
13
ns
ns
C
I
C
PD
NOTES:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W)
P
D
= C
PD
V
CC2
f
i
(C
L
f
i
= input frequency in MHz; C
L
= output load capacity in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
(C
L
V
CC2
f
o
) = sum of the outputs.
3.5
pF
Power dissipation capacitance per flip-flop
V
CC
= 3.3V, V
I
= GND to V
CC1
17
pF
V
CC2
f
o
) where:
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
PKG. DWG. #
16-Pin Plastic DIL
–40
°
C to +125
°
C
74LV423 N
74LV423 N
SOT38-1
16-Pin Plastic SO
–40
°
C to +125
°
C
74LV423 D
74LV423 D
SOT109-1
16-Pin Plastic SSOP Type II
–40
°
C to +125
°
C
74LV423 DB
74LV423 DB
SOT338-1
16-Pin Plastic TSSOP Type I
–40
°
C to +125
°
C
74LV423 PW
74LV423PW DH
SOT403-1
相關PDF資料 |
PDF描述 |
|---|---|
| 74LV423N | Dual retriggerable monostable multivibrator with reset |
| 74LV423PW | Dual retriggerable monostable multivibrator with reset |
| 74LV423PWDH | Dual retriggerable monostable multivibrator with reset |
| 74LV423 | Dual retriggerable monostable multivibrator with reset |
| 74LV4316PW-T | SPST Analog Switch |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 74LV423N | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual retriggerable monostable multivibrator with reset |
| 74LV423PW | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual retriggerable monostable multivibrator with reset |
| 74LV423PWDH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual retriggerable monostable multivibrator with reset |
| 74LV4316 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Quad bilateral switches |
| 74LV4316D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Quad bilateral switches |
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