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參數(shù)資料
| 型號： | SNJ54ACT1284J |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 7-BIT BUS INTERFACES WITH 3-STATE OUTPUTS |
| 中文描述： | 7位總線接口與三態(tài)輸出 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 291K |
| 代理商： | SNJ54ACT1284J |
SCAS459D NOVEMBER 1994 REVISED OCTOBER 2003
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of operating free-air temperature and supply
voltage (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ACT1284
MIN
0.4
SN74ACT1284
MIN
0.4
UNIT
VCC
TYP
MAX
TYP
MAX
Vhys
Input
hysteresis
VIT+ VIT for all inputs
5 V
V
4.7 V
0.2
0.2
B port
IOH = 14 mA
4.7 V
2.4
2.4
VOH
A port
IOH = 50
μ
A
MIN
to MAX
VCC0.2
VCC0.2
V
IOH = 4 mA
IOL =14 mA
IOL = 50
μ
A
IOL = 4 mA
VI = VCC or GND
VO = VCC or GND
VI or VO
≤
7 V
VI = VCC or GND,
VI = VCC or GND
VO = VCC or GND
IOH = 20 mA,
4.7 V
3.7
3.7
B port
4.7 V
0.4
0.4
VOL
A port
4.7 V
0.2
0.2
V
0.4
±
1
±
20
±
100
1.5
0.4
±
1
±
20
±
100
1.5
II
IOZ
Ioff
ICC
Ci
Cio
ZO
For I/O ports, the parameter IOZ includes the input leakage current II.
For conditions shown as MIN or MAX, use the appropriate values under recommended operating conditions.
5.5 V
μ
A
μ
A
μ
A
mA
A or B ports
5.5 V
B port
0 V
IO = 0
5.5 V
Control inputs
5 V
4
4
pF
A or B ports
5 V
12
12
pF
B port
IOH = 50 mA
5 V
8
30
8
30
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
SN54ACT1284
MIN
1
SN74ACT1284
MIN
1
UNIT
(OUTPUT)
MAX
MAX
tPLH
tPHL
SR
Totem pole
A or B
B or A
20
20
ns
1
20
1
20
Totem pole
B output
0.05
0.4
0.05
0.4
V/ns
tpd(EN)
tpd(DIS)
tr, tf
Totem pole
HD
B
1
20
1
20
ns
1
20
1
20
Open drain
A
B
120
120
ns
2
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