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參數(shù)資料
| 型號： | 7HCT1284D |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通用總線功能 |
| 英文描述： | Parallel printer interface transceiver/buffer |
| 中文描述： | QUAD LINE TRANSCEIVER, PDSO20 |
| 封裝： | 7.50 MM, PLASTIC, SOL-20 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 138K |
| 代理商： | 7HCT1284D |
Philips Semiconductors
Product specification
74HCT1284
Parallel printer interface transceiver/buffer
1998 Jul 10
5
AC CHARACTERISTICS
GND = 0V, t
R
= t
F
= 3.0ns, C
L
= 50pF, R
L
= 500
LIMITS
SYMBOL
PARAMETER
WAVEFORM
T
amb
= 25
°
C
V
CC
= 5.0V
TYP
T
amb
= 0 to + 70
°
C
V
CC
= Min to Max
MIN
UNIT
MIN
MAX
MAX
SR
B-Side Slew Rate
0.05
0.11
0.4
0.05
0.4
V/ns
t
PLH
t
PHL
Propagation delay
A toY or A to B
2
5.0
5.0
13.9
21.0
17.1
25.7
5.0
5.0
22
31
ns
t
PLH
t
PHL
Propagation delay
B to A
1
1.5
1.5
5.3
5.6
7.5
7.9
1.5
1.5
9.0
10.0
ns
t
PZH
t
PHZ
Output enable/disable time to/from High level
HD to Y or HD to B
3
4.0
2.0
12.0
6.5
16.0
9.1
4.0
2.0
20.0
11.0
ns
t
PZL
t
PLZ
Output enable/disable time to/from Low level
A to Y or A to B
4
5.0
1.5
12.7
5.0
16.3
7.1
5.0
1.5
20.0
9.0
ns
AC WAVEFORMS
For all waveforms, V
M
= 1.5V.
B
n
Input
V
M
t
PLH
t
PHL
A
– A
4
Output
50% V
CC
V
M
V
OH
V
OL
50% V
CC
SK00003
Waveform 1.
Propagation Delay for Bn to A1–A4
A
n
Input
V
M
t
PLH
t
PHL
B
or Y
n
Output
V
M
V
OH
–1.4V
V
OH
V
OL
V
OH
–1.4V
SK00004
Waveform 2.
Propagation Delay for An to Bn or Yn Outputs
HD Inputs
V
M
t
PZH
t
PHZ
0V
V
OH
–0.3V
B
n
or Y
n
Output
V
M
V
M
V
OH
SK00005
Waveform 3.
3-State Output Enable Time to High Level and
Output Disable Time from High Level
A
n
Input
t
PZL
t
PLZ
V
OL
+0.3V
V
OL
B
or Y
n
Output
V
M
V
M
V
M
SK00006
Waveform 4.
3-State Output enable Time to Low Level and
Output disable Time from Low Level
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