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參數(shù)資料
| 型號： | SNC54148J |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 算術(shù)邏輯單元 |
| 英文描述： | TTL/H/L SERIES, 8-BIT ENCODER, INVERTED OUTPUT, CDIP16 |
| 封裝： | CERAMIC, DIP-16 |
| 文件頁數(shù)： | 23/24頁 |
| 文件大小： | 758K |
| 代理商： | SNC54148J |
SN54147, SN54148, SN54LS147, SN54LS148
SN74147, SN74148 (TIM9907), SN74LS147, SN74LS148
10LINE TO 4LINE AND 8LINE TO 3LINE PRIORITY ENCODERS
SDLS053B OCTOBER 1976 REVISED MAY 2004
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
’147
’148
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIH
High-level input voltage
2
V
VIL
Low-level input voltage
0.8
V
VIK
Input clamp voltage
VCC = MIN,
II = 12 mA
1.5
V
VOH
High-level output voltage
VCC = MIN,
VIL = 0.8 V,
VIH = 2 V,
IOH = 800 A
2.4
3.3
2.4
3.3
V
VOL
Low-level output voltage
VCC = MIN,
VIL = 0.8 V,
VIH = 2 V,
IOL = 16 mA
0.2
0.4
0.2
0.4
V
II
Input current at maximum input
voltage
VCC = MIN,
VI = 5.5 V
1
mA
IIH
High-level input
0 input
VCC = MAX,
VI = 2.4 V
40
A
IIH
High-level input
current
Any input except 0
VCC = MAX,
VI = 2.4 V
40
80
A
IIL
Low-level input
0 input
VCC = MAX,
VI = 0.4 V
1.6
mA
IIL
Low-level input
current
Any input except 0
VCC = MAX,
VI = 0.4 V
1.6
3.2
mA
IOS
Short-circuit output current§
VCC = MAX
35
85
35
85
mA
ICC
Supply current
VCC = MAX
Condition 1
50
70
40
60
mA
ICC
Supply current
VCC = MAX
(See Note 5)
Condition 2
42
62
35
55
mA
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values are at VCC = 5 V, TA = 25°C.
§ Not more than one output should be shorted at a time.
NOTE 5: For ’147, ICC (Condition 1) is measured with input 7 grounded, other inputs and outputs open; ICC (Condition 2) is measured with all
inputs and outputs open. For ’148, ICC (Condition 1) is measured with inputs 7 and EI grounded, other inputs and outputs open; ICC
(Condition 2) is measured with all inputs and outputs open.
SN54147, SN74147 switching characteristics, VCC = 5 V, TA = 255C (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
WAVEFORM
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
tPLH
Any
In-phase output
9
14
ns
tPHL
Any
In-phase output
CL = 15 pF,
7
11
ns
tPLH
Any
Out-of-phase output
CL = 15 pF,
RL = 400
13
19
ns
tPHL
Any
Out-of-phase output
RL = 400
12
19
ns
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