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参数资料
| 型号： | SN54ALS28AFK |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 门电路 |
| 英文描述： | ALS SERIES, QUAD 2-INPUT NOR GATE, CQCC20 |
| 封装： | CERAMIC, LCC-20 |
| 文件页数： | 2/3页 |
| 文件大小： | 42K |
| 代理商： | SN54ALS28AFK |
UNIT
TEST CONDITIONS
PARAMETER
UNIT
VOL
V
PARAMETER
UNIT
SN54ALS28A, SN74ALS28A
QUADRUPLE 2-INPUT POSITIVE-NOR BUFFERS
SDAS193 – D2661, APRIL 1982 – REVISED MAY 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
2
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54ALS28A
– 55
°C to 125°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS28A
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
– 65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
recommended operating conditions
SN54ALS28A
SN74ALS28A
MIN
NOM
MAX
MIN
NOM
MAX
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
0.7
0.8
V
VOH
High-level output current
–1
–2.6
mA
IOL
Low-level output current
12
24
mA
TA
Operating free-air temperature
–55
125
0
70
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54ALS28A
SN74ALS28A
MIN
TYP
MAX
MIN
TYP
MAX
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.5
V
VCC = 4.5 V to 5.5 V,
IOH = – 0.4 mA
VCC –2
VOH
VCC = 4.5 V,
IOH = – 1 mA
2.4
3.3
V
VCC = 4.5 V,
IOH = – 2.6 mA
2.4
3.3
VCC = 4.5 V,
IOL = 12 mA
0.25
0.4
0.25
0.4
VCC = 4.5 V,
IOL = 24 mA
0.35
0.5
II
VCC = 5.5 V,
VI = 7 V
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
A
IIL
VCC = 5.5 V,
VI = 0.4 V
– 0.1
mA
IO
VCC = 5.5 V,
VO = 2.25 V
–30
–112
–30
–112
mA
ICCH
VCC = 5.5 V,
VI = 0 V
1.7
2.8
1.7
2.8
mA
ICCL
VCC = 5.5 V,
VI = 4.5 V
5.6
9
5.6
9
mA
All typical values are at VCC = 5 V, TA = 25°C.
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
switching characteristics (see Note 1)
VCC = 5 V,
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
FROM
TO
RL = 500 ,
RL = 500 ,
(INPUT)
(OUTPUT)
TA = 25°C
TA = MIN to MAX
’ALS28A
SN54ALS28A
SN74ALS28A
TYP
MIN
MAX
MIN
MAX
tPLH
A or B
Y
4
1
16
2
8
tPHL
A or B
Y
4
1
10
2
7
NOTE 1: Load circuit and voltage waveforms are shown in Section 1.
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