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參數(shù)資料
| 型號(hào)： | 74HCT123 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-Line To 1-Line Data Selectors/Multiplexers 16-SOIC -40 to 85 |
| 中文描述： | 雙retriggerable單穩(wěn)態(tài)觸發(fā)器的復(fù)位 |
| 文件頁數(shù)： | 9/17頁 |
| 文件大小： | 124K |
| 代理商： | 74HCT123 |
1998 Jul 08
9
Philips Semiconductors
Product specification
Dual retriggerable monostable
multivibrator with reset
74HC/HCT123
Notes to AC characteristics
1.
For other R
EXT
and C
EXT
combinations see Fig.9.
If C
EXT
>
10 nF, the next formula is valid:
t
W
= K
×
R
EXT
×
C
EXT
(typ.)
where: t
W
= output pulse width in ns;
R
EXT
= external resistor in k
; C
EXT
= external capacitor in pF;
K
= constant = 0.55 for V
CC
= 5.0 V and 0.48 for V
CC
= 2.0 V.
The inherent test jig and pin capacitance at pins 15 and 7 (nR
EXT
/ C
EXT
) is approximately 7 pF.
2.
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 input pulses
meets the minimum retrigger time.
If C
EXT
>
10 pF, the next formula (at V
CC
= 5.0 V) for the set-up time of a retrigger pulse is valid:
t
rt
= 30 + 0.19
×
R
EXT
×
C
EXT0.9
+ 13
×
R
EXT1.05
(typ.)
where:
t
rt
C
EXT
= external capacitor in pF;
R
EXT
= external resistor in k
.
= retrigger time in ns;
The inherent test jig and pin capacitance at pins 15 and 7 (nR
EXT
/ C
EXT
) is 7 pF.
3.
When the device is powered-up, initiate the device via a reset pulse, when C
EXT
<
50 pF.
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| 74HCT123D | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL MONO RETRIG 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(shí)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 |
| 74HCT123D,652 | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL MONO RETRIG 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(shí)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 |
| 74HCT123D,653 | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL RETRIG MONOSTABLE 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(shí)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 |
| 74HCT123D | 制造商:NXP Semiconductors 功能描述:74HCT CMOS SMD 74HCT123 SOIC16 |
| 74HCT123D/AUJ | 制造商:NXP Semiconductors 功能描述:74HCT123D/SO16/REEL13//AU - Tape and Reel 制造商:NXP Semiconductors 功能描述:IC MULTIVIBRATR DUAL MONO 16SOIC |
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