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参数资料
| 型号： | SN74AS856NT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | AS SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDIP24 |
| 封装： | 0.300 INCH, PLASTIC, DIP-24 |
| 文件页数： | 5/9页 |
| 文件大小： | 127K |
| 代理商： | SN74AS856NT |
SN54AS856, SN74AS856
8BIT UNIVERSAL TRANSCEIVER PORT CONTROLLERS
SDAS032A DECEMBER 1983 REVISED MARCH 1985
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
5
absolute maximum ratings over free-air temperature range
Supply voltage, VCC
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage: All inputs
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O ports
5.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage applied to a disabled 3-state output
5.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range:
SN54AS856
55
°C to 125°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74AS856
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
recommended operating conditions
SN54AS856
SN74AS856
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
V
VIL
Low-level input voltage
0.8
V
IOH
High-level output current
A1-A8, B1-B8
12
15
mA
IOH
High-level output current
Q8
2
mA
IOL
Low-level output current
A1-A8, B1-B8
32
48
mA
IOL
Low-level output current
Q8
20
mA
fclock
Clock frequency
0
45
0
50
MHz
tw
Duration of clock pulse
11
10
ns
tsu
Setup time before CLK
↑
A1-A8, B1-B8 SERIN
5.5
ns
tsu
Setup time before CLK
↑
OEB, OEA, MODE
5.5
ns
th
Hold-time, data after CLK
↑
A1-A8, B1-B8 SERIN
0
ns
th
Hold-time, data after CLK
↑
OEB, OEA, MODE
0
ns
TA
Operating free-air temperature
55
125
0
70
°C
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