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| 型號(hào)： | HEF4047BP |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類(lèi)： | 振蕩器 |
| 英文描述： | Monostable-astable multivibrator |
| 封裝： | HEF4047BP<SOT27-1 (DIP14)|<<http://www.nxp.com/packages/SOT27-1.html<1<Always Pb-free,;HEF4047BT<SOT108-1 (SO14)|<<http://www.nxp.com/packages/SOT108-1.html<1<week |
| 文件頁(yè)數(shù)： | 12/15頁(yè) |
| 文件大小： | 274K |
| 代理商： | HEF4047BP |
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January 1995
12
Philips Semiconductors
Product specification
Monostable/astable multivibrator
HEF4047B
MSI
3. Retrigger mode operation
The HEF4047B can be used in the retrigger mode to extend the output pulse duration, or to compare the frequency of
an input signal with that of the internal oscillator. In the retrigger mode the input pulse is applied to pins 8 and 12, and
the output is taken from pin 10 or 11. Normal monostable action is obtained when one retrigger pulse is applied (Fig.8).
Extended pulse duration is obtained when more than one pulse is applied. For two input pulses, t
RE
= t
1
’ + t
1
+ 2t
2
.
For more than two pulses, t
RE
(output O), terminates at some variable time, t
D
, after the termination of the last retrigger
pulse; t
D
is variable because t
RE
(output O) terminates after the second positive edge of the oscillator output appears at
flip-flop 4.
4. External counter option
Time t
M
can be extended by any amount with the use of external counting circuitry. Advantages include digitally
controlled pulse duration, small timing capacitors for long time periods, and extremely fast recovery time. A typical
implementation is shown in Fig.9.
The pulse duration at the output is:
t
ext
N
1
–
+
=
Where t
ext
= pulse duration of the circuitry, and N is the number of counts used.
Fig.8 Retrigger mode waveforms.
(
)
t
A
(
)
t
M
1 2 t
A
+
(
)
Fig.9 Implementation of external counter option.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HEF4047BT | Monostable-astable multivibrator |
| HEF4049BP | Hex inverting buffers |
| HEF4049BT | Hex inverting buffers |
| HEF4050BT | Hex non-inverting buffers |
| HEF4050BP | Hex non-inverting buffers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HEF4047BP,652 | 功能描述:單穩(wěn)態(tài)多諧振蕩器 MONO/ASTBL MLTVIBRTR RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類(lèi)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 |
| HEF4047BP652 | 制造商:NXP Semiconductors 功能描述:IC MONOSTABLE / ASTABLE MULTIVIBRATOR |
| HEF4047BPN | 制造商:PHI 功能描述:4047 |
| HEF4047BT | 制造商:NXP Semiconductors 功能描述:HEF4000 Monostable/Astable Multivibrator Bulk 制造商:NXP Semiconductors 功能描述:IC 4000 LOCMOS SMD 4047 SOIC14 制造商:NXP Semiconductors 功能描述:IC, 4000 LOCMOS, SMD, 4047, SOIC14 制造商:NXP Semiconductors 功能描述:IC, 4000 LOCMOS, SMD, 4047, SOIC14; Multivibrator Type:Monostable / Astable; Output Current:2.4mA; Propagation Delay:50ns; Logic Case Style:SOIC; No. of Pins:14; Supply Voltage Min:4.5V; Supply Voltage Max:15.5V; Operating ;RoHS Compliant: Yes |
| HEF4047BT,652 | 功能描述:單穩(wěn)態(tài)多諧振蕩器 MONO/ASTBL MLTVIBRTR RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類(lèi)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 |
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