HD74HC148P-E [RENESAS]
HC/UH SERIES, 8-BIT ENCODER, PDIP16, DP-16;
| 型号： | HD74HC148P-E |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | HC/UH SERIES, 8-BIT ENCODER, PDIP16, DP-16 编码器 |
| 文件： | 总6页 (文件大小：79K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HD74HC148
8-to-3-line Octal Priority Encoder
REJ03D0573-0200
(Previous ADE-205-447)
Rev.2.00
Oct 11, 2005
Description
HD74HC148 encodes eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and
enable output EO) is provided to allow octal expansion without the need for external circuitry. The data inputs and
outputs are active at the low logic level.
Features
•
•
•
•
•
•
High Speed Operation: tpd (0 - 7 to A0 - A2) = 15 ns typ (CL = 50 pF)
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Ordering Information
Package Code
(Previous Code)
Package
Abbreviation
Taping Abbreviation
(Quantity)
Part Name
HD74HC148P
HD74HC148FPEL SOP-16 pin (JEITA)
Package Type
PRDP0016AE-B
(DP-16FV)
DILP-16 pin
P
—
PRSP0016DH-B
(FP-16DAV)
FP
EL (2,000 pcs/reel)
Note: Please consult the sales office for the above package availability.
Function Table
Inputs
Outputs
EI
H
L
L
L
L
L
L
L
L
L
0
1
X
H
X
X
X
X
X
X
L
2
X
H
X
X
X
X
X
L
3
X
H
X
X
X
X
L
4
X
H
X
X
X
L
5
X
H
X
X
L
6
X
H
X
L
7
X
H
L
A2
H
H
L
A1
H
H
L
A0
H
H
L
GS
H
H
L
EO
H
L
X
H
X
H
H
H
H
H
H
H
H
X
H
H
H
H
H
H
H
L
L
H
L
L
X
H
H
H
H
H
H
L
H
H
L
L
X
H
H
H
H
H
L
H
L
L
X
H
H
H
H
H
H
H
H
L
X
H
H
H
L
H
L
L
X
H
H
H
H
L
L
H
H
L
H :
High level
Low level
Irrelevant
L :
X :
Rev.2.00, Oct 11, 2005 page 1 of 5
HD74HC148
Pin Arrangement
1
2
3
4
5
6
7
8
16 VCC
15 EO
14 GS
13 3
4
5
4
EO
GS
5
Outputs
Inputs
6
6
7
3
2
1
0
7
EI
12 2
EI
Inputs
A
2
11 1
A
2
1
Outputs
A
1
10 0
A
A0
9 A
0
Output
GND
(Top view)
Absolute Maximum Ratings
Item
Supply voltage range
Input voltage
Symbol
VCC
Rating
Unit
V
–0.5 to +7.0
VIN
–0.5 to VCC + 0.5
V
Output voltage
VOUT
IOUT
ICC, IGND
IIK
–0.5 to VCC + 0.5
V
Output current
±25
±50
mA
mA
mA
mA
mW
°C
DC current drain per VCC, GND
DC input diode current
DC output diode current
Power dissipation per package
Storage temperature
±20
IOK
±20
PT
500
Tstg
–65 to +150
Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of
which may be realized at the same time.
Recommended Operating Conditions
Item
Supply voltage
Symbol
VCC
Ratings
2 to 6
Unit
V
Conditions
Input / Output voltage
Operating temperature
VIN, VOUT
Ta
0 to VCC
–40 to 85
0 to 1000
0 to 500
0 to 400
V
°C
VCC = 2.0 V
VCC = 4.5 V
CC = 6.0 V
Input rise / fall time*1
tr, tf
ns
V
Note: 1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Rev.2.00, Oct 11, 2005 page 2 of 5
HD74HC148
Electrical Characteristics
Ta = 25°C
Typ Max
Ta = –40 to+85°C
Item
Symbol VCC (V)
VIH
Unit
Test Conditions
Min
1.5
3.15
4.2
—
Min
1.5
3.15
4.2
—
Max
—
Input voltage
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
6.0
6.0
—
—
—
—
V
—
—
—
—
VIL
—
0.5
1.35
1.8
—
0.5
1.35
1.8
—
V
V
—
—
—
—
—
—
Output voltage
VOH
1.9
4.4
5.9
4.18
5.68
—
2.0
4.5
6.0
—
1.9
4.4
5.9
4.13
5.63
—
Vin = VIH or VIL IOH = –20 µA
—
—
—
—
—
—
IOH = –4 mA
IOH = –5.2 mA
—
—
—
VOL
0.0
0.0
0.0
—
0.1
0.1
0.1
0.26
0.26
±0.1
4.0
0.1
0.1
0.1
0.33
0.33
±1.0
40
V
Vin = VIH or VIL IOL = 20 µA
—
—
—
—
—
—
IOL = 4 mA
—
—
—
IOL = 5.2 mA
Input current
Iin
—
—
—
µA Vin = VCC or GND
Quiescent supply
current
ICC
—
—
—
µA Vin = VCC or GND, Iout = 0 µA
Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Typ Max
Ta = –40 to +85°C
Item
Symbol VCC (V)
Unit
Test Conditions
Min
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Min
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Max
290
58
Propagation delay tPLH, tPHL
time
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
—
—
15
—
—
16
—
—
18
—
—
12
—
—
12
—
—
12
—
—
5
230
46
ns 0 - 7 to A0 - A2
ns 0 - 7 to EO
ns 0 - 7 to GS
ns EI to A0 - A2
ns EI to GS
ns EI to EO
ns
39
49
tPLH, tPHL
tPLH, tPHL
tPLH, tPHL
tPLH, tPHL
250
50
315
63
43
54
270
54
340
68
46
58
230
46
290
58
39
49
250
50
315
63
43
54
t
PLH, tPHL
270
54
340
68
46
58
Output rise/fall
time
tTLH, tTHL
75
90
15
19
—
5
13
16
Input capacitance
Cin
10
10
pF
Rev.2.00, Oct 11, 2005 page 3 of 5
HD74HC148
Test Circuit
Measurement point
*
C L
Note: CL includes the probe and fig capacitance.
Waveforms
tr
tf
VCC
0 V
90 %
50 %
90 %
50 %
Input
10 %
10 %
tPLH
tPHL
VOH
90 %
90 %
50 %
10 %
50 %
10 %
Same-phase output
VOL
tTLH
tTHL
tPLH
tPHL
VOH
90 %
90 %
50 %
10 %
50 %
10 %
Inverse-phase output
VOL
tTLH
tTHL
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns
2. The output are measured one at a time with one transition per measurement.
Rev.2.00, Oct 11, 2005 page 4 of 5
HD74HC148
Package Dimensions
JEITA Package Code
P-DIP16-6.3x19.2-2.54
RENESAS Code
Previous Code
DP-16FV
MASS[Typ.]
1.05g
PRDP0016AE-B
D
16
9
1
8
b 3
0.89
Z
Dimension in Millimeters
Reference
Symbol
Min
Nom
7.62
19.2
6.3
Max
e
1
D
20.32
7.4
E
A
5.06
A 1
0.51
0.40
b
0.48
1.30
0.25
0.56
p
bp
e
c
b
3
c
θ
0.19
0.31
e 1
0
°
15°
e
Z
L
2.29
2.54
2.54
2.79
1.12
( Ni/Pd/Au plating )
JEITA Package Code
RENESAS Code
PRSP0016DH-B
Previous Code
FP-16DAV
MASS[Typ.]
0.24g
P-SOP16-5.5x10.06-1.27
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
*1
D
F
16
9
bp
Index mark
Dimension in Millimeters
Reference
Symbol
Min
Nom
10.06
5.50
Max
10.5
Terminal cross section
( Ni/Pd/Au plating )
D
E
1
8
bp
A 2
A 1
A
*3
e
0.00
0.34
0.15
0.10
0.40
0.20
0.20
2.20
0.46
Z
x
M
L1
b p
b 1
c
0.25
c
1
θ
H E
e
0
°
8°
7.50
7.80
1.27
8.00
y
x
0.12
0.15
0.80
0.90
L
y
Z
Detail F
L
0.50
0.70
1.15
L
1
Rev.2.00, Oct 11, 2005 page 5 of 5
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相关型号：
HD74HC149RPEL
HC SERIES, 8-BIT ENCODER, PDSO20, 12.80 X 7.50 MM, 1.27 MM PITCH, PLASTIC, SOP-20
RENESAS
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