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参数资料
| 型号： | SN74LS148N |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 算术逻辑单元 |
| 英文描述： | LS SERIES, 8-BIT ENCODER, INVERTED OUTPUT, PDIP16 |
| 封装： | ROHS COMPLIANT, PLASTIC, DIP-16 |
| 文件页数： | 26/26页 |
| 文件大小： | 831K |
| 代理商： | SN74LS148N |
SN54147, SN54148, SN54LS147, SN54LS148
SN74147, SN74148 (TIM9907), SN74LS147, SN74LS148
10LINE TO 4LINE AND 8LINE TO 3LINE PRIORITY ENCODERS
SDLS053B OCTOBER 1976 REVISED MAY 2004
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
SN54148, SN74148 switching characteristics, VCC = 5 V, TA = 255C (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
WAVEFORM
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
tPLH
1–7
A0, A1, or A2
In-phase output
10
15
ns
tPHL
1–7
A0, A1, or A2
In-phase output
9
14
ns
tPLH
1–7
A0, A1, or A2
Out-of-phase output
13
19
ns
tPHL
1–7
A0, A1, or A2
Out-of-phase output
12
19
ns
tPLH
0–7
EO
Out-of-phase output
6
10
ns
tPHL
0–7
EO
Out-of-phase output
14
25
ns
tPLH
0–7
GS
In-phase output
CL = 15 pF,
18
30
ns
tPHL
0–7
GS
In-phase output
CL = 15 pF,
RL = 400
14
25
ns
tPLH
EI
A0, A1, or A2
In-phase output
RL = 400
10
15
ns
tPHL
EI
A0, A1, or A2
In-phase output
10
15
ns
tPLH
EI
GS
In-phase output
8
12
ns
tPHL
EI
GS
In-phase output
10
15
ns
tPLH
EI
EO
In-phase output
10
15
ns
tPHL
EI
EO
In-phase output
17
30
ns
tPLH = propagation delay time, low-to-high-level output.
tPHL = propagation delay time, high-to-low-level output.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54LS’
SN74LS’
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIH
High-level input voltage
2
V
VIL
Low-level input voltage
0.7
0.8
V
VIK
Input clamp voltage
VCC = MIN,
II = 18 mA
1.5
V
VOH
High-level output voltage
VCC = MIN,
VIL = 0.8 V,
VIH = 2 V,
IOH = 400 A
2.5
3.4
2.7
3.4
V
VOL
Low-level output voltage
VCC = MIN,
VIH = 2 V,
IOL = 4 mA
0.25
0.4
0.25
0.4
V
VOL
Low-level output voltage
CC
VIH = 2 V,
VIL = VIL MAX
IOL = 8 mA
0.35
0.5
V
II
Input current at
maximum input
’LS148 inputs 1–7
VCC = MAX,
VI = 7 V
0.2
mA
II
maximum input
voltage
All other inputs
VCC = MAX,
VI = 7 V
0.1
mA
IIH
High-level input
’LS148 inputs 1–7
VCC = MAX,
VI = 2.7 V
40
A
IIH
High-level input
current
All other inputs
VCC = MAX,
VI = 2.7 V
20
A
IIL
Low-level input
’LS148 inputs 1–7
VCC = MAX,
VI = 0.4 V
0.8
mA
IIL
Low-level input
current
All other inputs
VCC = MAX,
VI = 0.4 V
0.4
mA
IOS
Short-circuit output current§
VCC = MAX
20
100
20
100
mA
ICC
Supply current
VCC = MAX
Condition 1
12
20
12
20
mA
ICC
Supply current
VCC = MAX
(See Note 6)
Condition 2
10
17
10
17
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 6: For ’LS147, 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 ’LS148, 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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LS148N | 制造商:Texas Instruments 功能描述:Decoder / Encoder / Multiplexer / Demult |
| SN74LS148N3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74LS148NDS | 制造商:Motorola Inc 功能描述:74LS148NDS |
| SN74LS148NE4 | 功能描述:编码器、解码器、复用器和解复用器 8-line to 3-line Priority encoder RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS148NMOT88 | 制造商:Motorola 功能描述:74LS148N SB-12 |
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