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參數(shù)資料
| 型號(hào)： | 74F647 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Octal transceiver/register, non-inverting open-collector |
| 中文描述： | 八路收發(fā)器/寄存器，非反相開(kāi)路集電極 |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大小： | 115K |
| 代理商： | 74F647 |
Philips Semiconductors
Product specification
74F647/74F649
Octal transceivers/registers (open-collector)
1992 Feb 28
7
AC WAVEFORMS (Continued)
For all waveforms, V
M
= 1.5V
The shaded areas indicate when the input is permitted to change for predictable output performance.
V
M
V
M
V
M
V
M
t
PHL
t
PLH
An or Bn
Bn or An
SBA or SAB
An or Bn
SF00396
Waveform 3. Propagation Delay, An to Bn or Bn to An and
SBA to An or SAB to Bn
V
M
V
M
V
M
V
M
V
M
V
M
t
s
(H)
t
s
(L)
t
h
(H)
t
h
(H)
CPBA
or
CPAB
An or Bn
SF01165
Waveform 4. Data Setup and Hold Times
TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS
0
100
200
300
400
500
600
18
16
14
12
10
8
6
4
2
0
LOAD RESISTOR ( )
PROPAGATION
DELAY (ns)
t
PLH
t
PHL
SF01208
NOTE:
When using open-collector part, the value of the pull-up resistor greatly affects the value of the t
PLH
. For example, changing the pull-up resistor
value from 500 to 100 will improve the t
PLH
up to 50% with only slight increase in the t
PHL
. However, if the pull-up resistor is changed, the
user must take certain that the total I
OL
current through the resistor and the total I
IL
’s of the receivers do not exceed the I
OL
maximum
specification.
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相關(guān)代理商/技術(shù)參數(shù) |
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| 74F648 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Octal Transceiver/Register with TRI-STATE Outputs |
| 74F648 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74F648A | 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Octal transceiver/register, non-inverting 3-State |
| 74F648FCQB | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Octal Transceiver/Register with TRI-STATE Outputs |
| 74F648FCX | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Octal Transceiver/Register with TRI-STATE Outputs |
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