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參數(shù)資料
| 型號： | 74HCT5555 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Programmable delay timer with oscillator |
| 中文描述： | 與振蕩器可編程延遲計時器 |
| 文件頁數(shù)： | 22/23頁 |
| 文件大?。?/td> | 142K |
| 代理商： | 74HCT5555 |
September 1993
22
Philips Semiconductors
Product specification
Programmable delay timer with oscillator
74HC/HCT5555
Minimum Output Pulse Width
The minimum output pulse width is
determined by the minimum clock
pulse width, plus the maximum
propagation delay of A, B to Q. The
rising edge of Q is dominated by the
A, B to Q propagation delay, while the
falling edge of Q is dominated by RS
to Q propagation delay. These
propagation delays are not equal. The
RS to Q propagation delay is some
what longer, resulting in inaccurate
outputs for extremely short pulses.
The propagation delays are listed in
the section 'AC Characteristics'. With
these numbers it is possible to
calculate the maximum deviation (an
example is shown in Fig.16).
Figure 16 is valid for an external clock
where the trigger is synchronized to
the falling edge of the clock only. The
graph shows that the minimum
programmed pulse width of 100 ns is:
minimum of 4% too long
typically 7% too long
maximum of 10% too long.
SYNCHRONIZATION LIMITS
NUMBER OF STAGES SELECTED
CLOCK FREQUENCY (TYPICAL)
1
2
3
4
5
6
7
8
.
17
18
19
20
21
22
23
24
18 MHz
14 MHz
11 MHz
9.6 MHz
8.3 MHz
7.3 MHz
6.6 MHz
6 MHz
.
3.2 MHz
3.0 MHz
2.9 MHz
2.8 MHz
2.7 MHz
2.6 MHz
2.5 MHz
2.4 MHz
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74HC5555 | Programmable delay timer with oscillator |
| 74HCT563 | 4-Bit Synchronous Up/Down Counters (Dual Clock With Clear) 16-SOIC -40 to 85 |
| 74HC563 | Octal D-type transparent latch; 3-state; inverting |
| 74HC563PW | Octal D-type transparent latch; 3-state; inverting |
| 74HC563DB | Octal D-type transparent latch; 3-state; inverting |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74HCT5555D | 功能描述:計時器和支持產(chǎn)品 PROG DELAY TIMER W/OSC RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 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 |
| 74HCT5555D,112 | 功能描述:計時器和支持產(chǎn)品 PROG DELAY TIMER RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 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 |
| 74HCT5555D,118 | 功能描述:計時器和支持產(chǎn)品 PROG DELAY TIMER W/SCH TRIGGER RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 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 |
| 74HCT5555D-T | 制造商:NXP Semiconductors 功能描述:Programmable Timer Single 16-Pin SO T/R |
| 74HCT5555N | 功能描述:計時器和支持產(chǎn)品 PROG DELAY TIMER W/SCH TRIGGER RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 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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