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HC148 Datasheet

  • HC148

  • 8-LINE TO 3-LINE PRIORITY ENCODERS

  • 17頁

  • TI

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SN54HC148, SN74HC148
8 LINE TO 3 LINE PRIORITY ENCODERS
SCLS109G 鈭?MARCH 1984 鈭?REVISED APRIL 2004
D
D
D
D
D
D
D
D
Wide Operating Voltage Range of 2 V to 6 V
Outputs Can Drive Up To 10 LSTTL Loads
Low Power Consumption, 80-碌A(chǔ) Max I
CC
Typical t
pd
= 16 ns
鹵4-mA
Output Drive at 5 V
Low Input Current of 1
碌A(chǔ)
Max
Encode Eight Data Lines to 3-Line Binary
(Octal)
Applications Include:
鈭?n-Bit Encoding
鈭?Code Converters and Generators
SN54HC148 . . . J OR W PACKAGE
SN74HC148 . . . D, DW, N, OR NS PACKAGE
(TOP VIEW)
4
5
6
7
EI
A2
A1
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
EO
GS
3
2
1
0
A0
description/ordering information
The 鈥橦C148 devices feature priority decoding of
the inputs to ensure that only the highest-order
data line is encoded. These devices encode eight
data lines to 3-line (4-2-1) binary (octal).
Cascading circuitry (enable input EI and enable
output EO) has been provided to allow octal
expansion without the need for external circuitry.
Data inputs and outputs are active at the low logic
level.
SN54HC148 . . . FK PACKAGE
(TOP VIEW)
5
4
NC
V
CC
EO
6
7
NC
EI
A2
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
GS
3
NC
2
1
NC 鈭?No internal connection
ORDERING INFORMATION
TA
PDIP 鈭?N
PACKAGE鈥?/div>
Tube of 25
Tube of 40
鈭?0擄C to 85擄C
SOIC 鈭?D
SOIC 鈭?DW
SOP 鈭?NS
CDIP 鈭?J
鈭?5擄C to 125 C
鈭?5 C 125擄C
CFP 鈭?W
LCCC 鈭?FK
Reel of 2500
Reel of 250
Reel of 2000
Reel of 2000
Tube of 25
Tube of 150
Tube of 55
ORDERABLE
PART NUMBER
SN74HC148N
SN74HC148D
SN74HC148DR
SN74HC148DT
SN74HC148DWR
SN74HC148NSR
SNJ54HC148J
SNJ54HC148W
SNJ54HC148FK
HC148
HC148
SNJ54HC148J
SNJ54HC148W
SNJ54HC148FK
HC148
TOP-SIDE
MARKING
SN74HC148N
鈥?Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
On products compliant to MIL PRF 38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
Copyright
錚?/div>
2004, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
A1
GND
NC
A0
0
1

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    Breake Away Header .025(0.64mm) Square Posts
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