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SN74AS648 数据表(PDF) 7 Page - Texas Instruments

部件名 SN74AS648
功能描述  OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
Download  27 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

SN74AS648 数据表(HTML) 7 Page - Texas Instruments

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SN54ALS646, SN54ALS648, SN54AS646
SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648
OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SDAS039F – DECEMBER 1983 – REVISED JANUARY 1995
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS646
SN74ALS646A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
MIN
TYP†
MAX
UNIT
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.2
– 1.2
V
VCC = 4.5 V to 5.5 V,
IOH = – 0.4 mA
VCC –2
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
IOL = 12 mA
0.25
0.4
0.25
0.4
VOL
VCC = 4.5 V
IOL = 24 mA
0.35
0.5
V
IOL = 48 mA‡
0.35
0.5
II
Control inputs
VCC =5 5V
VI = 7 V
0.1
0.1
mA
II
A or B ports
VCC = 5.5 V
VI = 5.5 V
0.1
0.1
mA
I
Control inputs
V5 5 V
V2 7 V
20
20
A
IIH
A or B ports§
VCC = 5.5 V,
VI = 2.7 V
20
20
µA
I
Control inputs
V5 5 V
V0 4 V
– 0.2
– 0.2
mA
IIL
A or B ports§
VCC = 5.5 V,
VI = 0.4 V
– 0.2
– 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
55
88
55
88
mA
Outputs disabled
55
88
55
88
† All typical values are at VCC = 5 V, TA = 25°C.
‡ Applies only to the -1 version and only if VCC is maintained between 4.75 V and 5.25
§ 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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