參數(shù)資料
型號: SN74ALS648ADW
廠商: Texas Instruments, Inc.
英文描述: OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
中文描述: 八路總線收發(fā)器和寄存器具有三態(tài)輸出
文件頁數(shù): 2/18頁
文件大小: 270K
代理商: SN74ALS648ADW
SN54ALS646, SN54ALS648, SN54AS646
SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648
OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SDAS039F – DECEMBER 1983 – REVISED JANUARY 1995
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS648
SN74ALS648A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.2
V
VCC = 4.5 V to 5.5 V,
IOH = – 0.4 mA
VCC –2
VOH
IOH = – 3 mA
2.4
3.2
2.4
3.2
V
VOH
VCC = 4.5 V
IOH = – 12 mA
2
V
IOH = – 15 mA
2
VOL
VCC =4 5V
IOL = 12 mA
0.25
0.4
0.25
0.4
V
VOL
VCC = 4.5 V
IOL = 24 mA
0.35
0.5
V
II
Control inputs
VCC =5 5V
VI = 7 V
0.1
mA
II
A or B ports
VCC = 5.5 V
VI = 5.5 V
0.1
mA
I
Control inputs
V5 5 V
V2 7 V
20
A
IIH
A or B ports
VCC = 5.5 V,
VI = 2.7 V
20
A
I
Control inputs
V5 5 V
V0 4 V
– 0.2
mA
IIL
A or B ports
VCC = 5.5 V,
VI = 0.4 V
– 0.2
mA
IO§
VCC = 5.5 V,
VO = 2.25 V
–20
–112
–30
–112
mA
Outputs high
47
76
47
76
ICC
VCC = 5.5 V
Outputs low
57
88
57
88
mA
Outputs disabled
57
88
57
88
All typical values are at VCC = 5 V, TA = 25°C.
For I/O ports, the parameters IIH and IIL include the off-state output current.
§ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
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