參數(shù)資料
型號(hào)： SN54BCT25244FK
廠商： Texas Instruments, Inc.
英文描述： 25-ohm OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
中文描述： 25歐姆八路緩沖器/ 3司機(jī)態(tài)輸出
文件頁數(shù)： 3/5頁
文件大小： 73K
代理商： SN54BCT25244FK
SN54BCT25244, SN74BCT25244
25-
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS064A – JUNE 1990 – REVISED NOVEMBER 1993
2–3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions (see Note 2)
SN54BCT25244
MIN
NOM
SN74BCT25244
MIN
NOM
UNIT
MAX
MAX
VCC
VIH
VIL
IIK
IOH
IOL
TA
NOTE 2: Unused or floating inputs must be held high or low.
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
High-level input voltage
2
2
V
Low-level input voltage
0.8
0.8
V
Input clamp current
–18
–18
mA
High-level output current
–53
–80
mA
Low-level output current
125
188
mA
°
C
Operating free-air temperature
–55
125
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54BCT25244
MIN
TYP
SN74BCT25244
MIN
TYP
UNIT
MAX
MAX
VIK
VCC = 4.5 V,
VCC = 4.75 V,
II = –18 mA
IOH = – 3 mA
IOH = –53 mA
IOH = –80 mA
IOL = 94 mA
IOL = 125 mA
IOL = 188 mA
VI = 5.5 V
VI = 2.7 V
VI = 0.5 V
VO = 2.7 V
VO = 0.5 V
Outputs open
–1.2
–1.2
V
2.7
VOH
VCC= 4 5 V
VCC = 4.5 V
2
V
2
0.38
0.55
0.42
0.55
VOL
VCC = 4.5 V
0.8
V
0.7
II
IIH
IIL
IOZH
IOZL
ICCL
ICCH
ICCZ
Ci
Co
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5 V,
VCC = 5 V,
0.1
0.1
mA
μ
A
mA
μ
A
μ
A
mA
20
20
–0.6
–0.6
50
50
–50
–50
90
119
90
119
Outputs open
59
78
59
78
mA
Outputs open
7
11
7
11
mA
VI = 2.5 V or 0.5 V
VO = 2.5 V or 0.5 V
5.5
5.5
pF
17
17
pF
All typical values are at VCC = 5 V, TA = 25
°
C.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
L
= 50 pF (unless otherwise noted) (see Note 3)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
TA = 25
°
C
MIN
1
SN54BCT25244
SN74BCT25244
UNIT
TYP
3.2
MAX
4.9
MIN
MAX
5.6
MIN
MAX
5.5
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
A
Y
1
1
ns
2
4
5.6
2
6.3
2
6
OE
Y
3.2
5.6
8.5
3.2
9.7
3.2
9.3
ns
3.7
6.3
9.2
3.7
10.4
3.7
10.2
OE
Y
1.6
3.1
3.6
5.3
5.5
7.8
1.6
3.1
6.5
9.5
1.6
3.1
6.3
8.4
ns
NOTE 3: Load circuits and voltage waveforms are shown in Section 1.
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