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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)： | 8/16頁 |
| 文件大?。?/td> | 145K |
| 代理商： | 74LV123PWDH |
Philips Semiconductors
Product specification
74LV123
Dual retriggerable monostable multivibrator
with reset
1998 Apr 28
8
AC CHARACTERISTICS
(Continued)
GND = 0V; t
r
= t
f
≤
2.5ns; C
L
= 50pF; R
L
=1 K
CONDITION
LIMITS
SYMBOL
PARAMETER
WAVEFORM
–40 to +85
°
C
TYP
–40 to +125
°
C
MIN
UNIT
V
CC
(V)
1.2
2.0
2.7
3.0 to 3.6
4.5 to 5.5
1.2
2.0
2.7
3.0 to 3.6
4.5 to 5.5
MIN
10
5
3
2
2
MAX
1000
1000
1000
1000
1000
MAX
External timing
resistor
R
EXT
Figure 5
Κ
External timing
capacitor
ca acitor
C
EXT
Figure 5
3
No limits
pF
NOTES:
1. Unless otherwise stated, all typical values are at T
amb
= 25
°
C.
2. Typical value measured at V
CC
= 3.3V.
3. Typical value measured at V
CC
= 5.0V.
4. For other R
EXT
and C
EXT
combinations see Figure 5.
if C
EXT
> 10 nF, the next formula is valid:
t
W
= K x R
x C
(typ.)
where, t
W
= output pulse width in ns;
R
EXT
= external resistor in K
; C
= external capacitor in pF;
K
= constant = 0.45 for V
CC
= 5.0V and 0.48 for V
CC
= 2.0V.
The inherent test jig and pin capacitance at pins 15 and 7 (nR
EXT
/C
EXT
) is approximately 7 pF.
5. The time to retrigger the monostable multivibrator depends on the values of R
EXT
and C
EXT
.
The output pulse width will only be extended when the time between the active-going edges of the
trigger pulses meets the minimum retrigger time.
If C
EXT
> 10 pF, the next formula (at V
CC
= 5.0V) for the set-up time of a retrigger pulse is valid:
t
rt
= 30 + 0.19R x C
-9
+ 13 x R
1.05
(typ.)
where, t
rt
= retrigger time in ns;
C
EXT
= external capacitor in pF;
R
EXT
= external resistor in K
.
The inherent test jig and pin capacitance at pins 15 and 7 (nR
EXT
/C
EXT
) is approximately 7 pF.
6. When the device is powered up, initiate the device via a reset pulse, when C
EXT
< 50pF.
AC WAVEFORMS
V
M
= 1.5V at V
CC
V
are the typical output voltage drop that occur with the output
load.
2.7V; V
M
= 0.5 V
CC
at V
CC
2.7V; V
OL
and
t
W
t
W
t
rt
t
W
t
W
t
W
nB INPUT
nA INPUT
nQ OUTPUT
SV00139
Figure 1.Output pulse control using retrigger pulse;
nR
D
= HIGH.
t
W
t
W
t
W
nB INPUT
nR
D
INPUT
nQ OUTPUT
SV00140
Figure 2.Output pulse control using reset input nR
D
;
nA = LOW.
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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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