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參數(shù)資料
| 型號： | M74HC4538B1R |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 諧振器 |
| 英文描述： | HC/UH SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDIP16 |
| 封裝： | DIP-16 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大?。?/td> | 587K |
| 代理商： | M74HC4538B1R |
Pin connection and IEC logic symbols
M74HC4538
4/18
Figure 4.
Timing chart
Figure 5.
Block diagram
1.
Cx, Rx, Dx are external components.
2.
Dx is a clamping diode.
The external capacitor is charged to VCC in the standby state, i.e. no trigger. When the supply voltage is
turned off Cx is discharged mainly through an internal parasitic diode (see figures). If Cx is sufficiently large
and VCC decreases rapidly, there will be some possibility of damaging the IC with a surge current or latch-
up. If the voltage supply filter capacitor is large enough and VCC decreases slowly, the surge current is
automatically limited and damage to the IC is avoided. The maximum forward current of the parasitic diode
is approximately 20 mA. In cases where Cx is large the time taken for the supply voltage to fall to 0.4 VCC
can be calculated as follows: tf > (VCC - 0.7) x Cx/20 mA.
In cases where tf is too short an external clamping diode is required to protect the IC from the surge
current.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M74HC4538C1R | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR |
| M74HC4538M1R | 功能描述:單穩(wěn)態(tài)多諧振蕩器 Dual Mono Multivib 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 |
| M74HC4538RM13TR | 功能描述:單穩(wěn)態(tài)多諧振蕩器 Dual Mono Multivib 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 |
| M74HC4538RM13TR | 制造商:STMicroelectronics 功能描述:Dual Retriggerable Monostable Multivibra |
| M74HC4538TTR | 功能描述:單穩(wěn)態(tài)多諧振蕩器 Dual Mono Multivib 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 |
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