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參數(shù)資料
| 型號(hào)： | 74F649 |
| 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，非反相開路集電極 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 115K |
| 代理商： | 74F649 |
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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74F647 | Octal transceiver/register, non-inverting open-collector |
| 74F64 | 4-2-3-2-input AND-OR-invert gate |
| 74F646MSAX | Single 8-bit Bus Transceiver |
| 74F646SCX | Single 8-bit Bus Transceiver |
| 74F648SCX | Single 8-Bit Inverting Bus Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F64DC | 制造商:Fairchild Semiconductor Corporation 功能描述: 制造商:Texas Instruments 功能描述: |
| 74F64LC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| 74F64N | 制造商:NXP Semiconductors 功能描述: |
| 74F64PC | 功能描述:邏輯門 AND/OR Invert Gate RoHS:否 制造商:Texas Instruments 產(chǎn)品:OR 邏輯系列:LVC 柵極數(shù)量:2 線路數(shù)量（輸入/輸出）:2 / 1 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 傳播延遲時(shí)間:3.8 ns 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DCU-8 封裝:Reel |
| 74F64SC | 功能描述:邏輯門 AND/OR Invert Gate RoHS:否 制造商:Texas Instruments 產(chǎn)品:OR 邏輯系列:LVC 柵極數(shù)量:2 線路數(shù)量（輸入/輸出）:2 / 1 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 傳播延遲時(shí)間:3.8 ns 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DCU-8 封裝:Reel |
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