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參數(shù)資料
| 型號： | 74LV123PWDH |
| 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, SOT-403, TSSOP1-16 |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 145K |
| 代理商： | 74LV123PWDH |
Philips Semiconductors
Product specification
74LV123
Dual retriggerable monostable multivibrator
with reset
2
1998 Apr 28
853–1911 19290
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 74LV123 is a low-voltage Si-gate CMOS device and is pin and
function compatible with the 74HC/HCT123.
The 74LV123 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 1 and 2 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 5. 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
C
L
= 15pF
V
CC
= 3.3V
R
EXT
= 5K
C
EXT
= 0pF
25
20
ns
ns
C
I
Input capacitance
3.5
pF
C
PD
Power dissipation capacitance per monost-
able
V
CC
= 3.3V, V
I
= GND to V
CC1
60
pF
NOTES:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W)
P
= C
V
CC2
f
(C
L
f
i
= input frequency in MHz; C
L
= output load capacitance in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
(C
L
V
CC2
f
o
) = sum of the outputs.
V
CC2
f
) where:
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
PKG. DWG. #
16-Pin Plastic DIL
–40
°
C to +125
°
C
74LV123 N
74LV123 N
SOT38-1
16-Pin Plastic SO
–40
°
C to +125
°
C
74LV123 D
74LV123 D
SOT109-1
16-Pin Plastic SSOP Type II
–40
°
C to +125
°
C
74LV123 DB
74LV123 DB
SOT338-1
16-Pin Plastic TSSOP Type I
–40
°
C to +125
°
C
74LV123 PW
74LV123PW DH
SOT403-1
相關PDF資料 |
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|---|---|
| 74LV123 | Dual retriggerable monostable multivibrator with reset |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 74LV123PW-T | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL RETGIG MONOSTBL MULTI RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| 74LV125 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Quad buffer/line driver 3-State |
| 74LV125A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:QUADRUPLE BUS BUFFER GATES |
| 74LV125ATELL-E | 制造商:Renesas Electronics Corporation 功能描述:Buffer/Line Driver 4-CH Non-Inverting 3-ST CMOS 14-Pin TSSOP T/R Cut Tape |
| 74LV125D | 功能描述:緩沖器和線路驅(qū)動器 QUAD BUFR/DRVR OE ACTIVE LOW RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
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