參數(shù)資料
型號(hào): SN74HC645NSR
廠商: Texas Instruments, Inc.
英文描述: OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
中文描述: 八路總線收發(fā)器與三態(tài)輸出
文件頁(yè)數(shù): 2/12頁(yè)
文件大?。?/td> 403K
代理商: SN74HC645NSR
SCLS304B
JANUARY 1996
REVISED DECEMBER 2002
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic diagram (positive logic)
A1
B1
OE
DIR
To Seven Other Transceivers
19
1
2
18
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
) (see Note 1)
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
) (see Note 1)
Continuous output current, I
O
(V
O
= 0 to V
CC
)
Continuous current through V
CC
or GND
Package thermal impedance,
θ
JA
(see Note 2): DW package
0.5 V to 7 V
±
20 mA
±
20 mA
±
35 mA
±
70 mA
58
°
C/W
69
°
C/W
60
°
C/W
65
°
C to 150
°
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NS package
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under
absolute maximum ratings
may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under
recommended operating conditions
is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 3)
SN54HC645
SN74HC645
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
VCC
Supply voltage
2
5
6
2
5
6
V
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
1.5
1.5
VIH
High-level input voltage
High level in ut voltage
3.15
3.15
V
4.2
4.2
0.5
0.5
VIL
Low-level input voltage
Low level in ut voltage
1.35
1.35
V
1.8
1.8
VI
VO
Input voltage
0
VCC
VCC
1000
0
VCC
VCC
1000
V
Output voltage
0
0
V
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
t/
v
Input transition rise/fall time
In ut transition rise/fall time
500
500
ns
400
400
TA
Operating free-air temperature
55
125
40
85
°
C
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