TI SN74HC148DR

 SCLS109G − MARCH 1984 − REVISED APRIL 2004
D
Wide Operating Voltage Range of 2 V to 6 V
Outputs Can Drive Up To 10 LSTTL Loads
Low Power Consumption, 80-µA Max ICC
Typical tpd = 16 ns
±4-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Encode Eight Data Lines to 3-Line Binary
(Octal)
Applications Include:
− n-Bit Encoding
− 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
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
VCC
EO
GS
3
2
1
0
A0
SN54HC148 . . . FK PACKAGE
(TOP VIEW)
5
4
NC
VCC
EO
description/ordering information
The ’HC148 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.
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
A1
GND
NC
6
7
NC
EI
A2
GS
3
NC
2
1
A0
0
D
D
D
D
D
D
D
NC − No internal connection
ORDERING INFORMATION
PACKAGE†
TA
PDIP − N
−40°C to 85°C
−55°C
125°C
−55
C to 125
C
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
Tube of 25
SN74HC148N
Tube of 40
SN74HC148D
Reel of 2500
SN74HC148DR
Reel of 250
SN74HC148DT
SOIC − DW
Reel of 2000
SN74HC148DWR
HC148
SOP − NS
Reel of 2000
SN74HC148NSR
HC148
CDIP − J
Tube of 25
SNJ54HC148J
SNJ54HC148J
CFP − W
Tube of 150
SNJ54HC148W
SNJ54HC148W
LCCC − FK
Tube of 55
SNJ54HC148FK
SOIC − D
SN74HC148N
HC148
SNJ54HC148FK
† 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.
Copyright  2004, Texas Instruments Incorporated
! "#$ ! %#&'" ($)
(#"! " !%$""! %$ *$ $! $+! !#$!
!(( ,-) (#" %"$!!. ($! $"$!!'- "'#($
$!. '' %$$!)
%(#"! "%' /0 '' %$$! $ $!$(
#'$!! *$,!$ $() '' *$ %(#"! %(#"
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POST OFFICE BOX 655303
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1
SCLS109G − MARCH 1984 − REVISED APRIL 2004
FUNCTION TABLE
OUTPUTS
INPUTS
EI
2
0
1
2
3
4
5
6
7
A2
A1
A0
GS
EO
H
X
X
X
X
X
X
X
X
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
X
X
X
X
X
X
X
L
L
L
L
L
H
L
X
X
X
X
X
X
L
H
L
L
H
L
H
L
X
X
X
X
X
L
H
H
L
H
L
L
H
L
X
X
X
X
L
H
H
H
L
H
H
L
H
L
X
X
X
L
H
H
H
H
H
L
L
L
H
L
X
X
L
H
H
H
H
H
H
L
H
L
H
L
X
L
H
H
H
H
H
H
H
H
L
L
H
L
L
H
H
H
H
H
H
H
H
H
H
L
H
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SCLS109G − MARCH 1984 − REVISED APRIL 2004
logic diagram (positive logic)
0
10
15
14
1
2
11
4
6
7
EI
A0
13
1
7
5
GS
12
9
3
EO
A1
2
3
4
6
A2
5
Pin numbers shown are for the D, DW, J, N, NS, and W packages.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SCLS109G − MARCH 1984 − REVISED APRIL 2004
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Package thermal impedance, θJA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 3)
SN54HC148
VCC
VIH
Supply voltage
High-level input voltage
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
VCC = 2 V
VIL
VI
VO
∆t/∆v
Low-level input voltage
MIN
NOM
MAX
2
5
6
MIN
NOM
MAX
2
5
6
1.5
1.5
3.15
3.15
4.2
4.2
VCC = 4.5 V
VCC = 6 V
Input voltage
0
Output voltage
0
Input transition rise/fall time
SN74HC148
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
0.5
1.35
1.35
1.8
1.8
0
0
V
V
0.5
VCC
VCC
UNIT
VCC
VCC
1000
1000
500
500
400
400
V
V
V
ns
TA
Operating free-air temperature
−55
125
−40
85
°C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SCLS109G − MARCH 1984 − REVISED APRIL 2004
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = −20 µA
VOH
VI = VIH or VIL
IOH = −4 mA
IOH = −5.2 mA
IOL = 20 µA
VOL
VI = VIH or VIL
IOL = 4 mA
IOL = 5.2 mA
II
ICC
VI = VCC or 0
VI = VCC or 0,
IO = 0
VCC
MIN
TA = 25°C
TYP
MAX
MIN
MAX
SN74HC148
MIN
2V
1.9
1.998
1.9
1.9
4.5 V
4.4
4.499
4.4
4.4
6V
5.9
5.999
5.9
5.9
4.5 V
3.98
4.3
3.7
3.84
6V
5.48
5.8
5.2
MAX
UNIT
V
5.34
2V
0.002
0.1
0.1
0.1
4.5 V
0.001
0.1
0.1
0.1
6V
0.001
0.1
0.1
0.1
4.5 V
0.17
0.26
0.4
0.33
6V
0.15
0.26
0.4
0.33
6V
±0.1
±100
±1000
±1000
nA
8
160
80
µA
3
10
10
10
pF
6V
Ci
SN54HC148
2 V to 6 V
V
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
SN54HC148
SN74HC148
TO
(OUTPUT)
VCC
2V
69
180
270
225
1−7
A0, A1, or A2
4.5 V
23
36
54
45
6V
21
31
46
38
EO
0−7
GS
tpd
A0, A1, or A2
EI
GS
EO
tt
TA = 25°C
TYP
MAX
FROM
(INPUT)
Any
MIN
MIN
MAX
MIN
MAX
2V
60
150
225
190
4.5 V
20
30
45
38
6V
17
26
38
33
2V
75
190
285
240
4.5 V
25
38
57
48
6V
21
32
48
41
2V
78
195
295
245
4.5 V
26
39
59
49
6V
22
33
50
42
2V
57
145
220
180
4.5 V
19
29
44
36
6V
16
25
38
31
2V
66
165
250
205
4.5 V
22
33
50
41
6V
19
28
43
35
2V
28
75
110
95
4.5 V
8
15
22
19
6V
6
13
19
16
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
UNIT
ns
ns
5
SCLS109G − MARCH 1984 − REVISED APRIL 2004
operating characteristics, TA = 25°C
PARAMETER
Cpd
TEST CONDITIONS
Power dissipation capacitance
No load
TYP
UNIT
35
pF
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
Test
Point
Input
VCC
50%
50%
0V
CL = 50 pF
(see Note A)
tPLH
In-Phase
Output
LOAD CIRCUIT
50%
10%
tPHL
90%
90%
tr
Input
50%
10%
90%
90%
tr
tPHL
VCC
50%
10% 0 V
Out-of-Phase
Output
90%
tf
VOH
50%
10%
VOL
tf
tPLH
50%
10%
tf
50%
10%
90%
VOH
VOL
tr
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
NOTES: A. CL includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.
C. The outputs are measured one at a time, with one input transition per measurement.
D. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303
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SCLS109G − MARCH 1984 − REVISED APRIL 2004
APPLICATION INFORMATION
16-Line Data (active low)
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
0 1 2 3 4 5 6 7 EI
0 1 2 3 4 5 6 7 EI
’HC148
’HC148
EO A0
A1
A2 GS
EO
A0
A1
A2
Enable
(active low)
GS
’HC08
0
1
2
Priority Flag
(active low)
3
Encoded Data (active low)
16-Line Data (active low)
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
0 1 2 3 4 5 6 7 EI
0 1 2 3 4 5 6 7 EI
’HC148
’HC148
EO A0
A1
A2 GS
EO
A0
A1
A2
Enable
(active low)
GS
’HC00
0
1
2
Priority Flag
(active high)
3
Encoded Data (active high)
Figure 2. Priority Encoder for 16 Bits
Because the ’HC148 devices are combinational logic circuits, wrong addresses can appear during input transients.
Moreover, a change from high to low at EI can cause a transient low on GS when all inputs are high. This must be
considered when strobing the outputs.
POST OFFICE BOX 655303
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7
PACKAGE OPTION ADDENDUM
www.ti.com
6-Dec-2006
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
Lead/Ball Finish
MSL Peak Temp (3)
SN54HC148J
ACTIVE
CDIP
J
16
1
TBD
A42 SNPB
SN74HC148D
ACTIVE
SOIC
D
16
40
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
SN74HC148DE4
ACTIVE
SOIC
D
16
40
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
SN74HC148DR
ACTIVE
SOIC
D
16
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
SN74HC148DRE4
ACTIVE
SOIC
D
16
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
SN74HC148DT
ACTIVE
SOIC
D
16
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
SN74HC148DTE4
ACTIVE
SOIC
D
16
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
TBD
Call TI
N / A for Pkg Type
SN74HC148DW
OBSOLETE
SOIC
DW
16
SN74HC148DWR
ACTIVE
SOIC
DW
16
2000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Call TI
Level-1-260C-UNLIM
SN74HC148DWRE4
ACTIVE
SOIC
DW
16
2000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
SN74HC148N
ACTIVE
PDIP
N
16
25
Pb-Free
(RoHS)
CU NIPDAU
N / A for Pkg Type
SN74HC148NE4
ACTIVE
PDIP
N
16
25
Pb-Free
(RoHS)
CU NIPDAU
N / A for Pkg Type
SN74HC148NSR
ACTIVE
SO
NS
16
2000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
SN74HC148NSRE4
ACTIVE
SO
NS
16
2000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
SNJ54HC148FK
ACTIVE
LCCC
FK
20
1
TBD
SNJ54HC148J
ACTIVE
CDIP
J
16
1
TBD
A42 SNPB
N / A for Pkg Type
SNJ54HC148W
ACTIVE
CFP
W
16
1
TBD
A42
N / A for Pkg Type
POST-PLATE N / A for Pkg Type
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
6-Dec-2006
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 2
MECHANICAL DATA
MLCC006B – OCTOBER 1996
FK (S-CQCC-N**)
LEADLESS CERAMIC CHIP CARRIER
28 TERMINAL SHOWN
18
17
16
15
14
13
NO. OF
TERMINALS
**
12
19
11
20
10
A
B
MIN
MAX
MIN
MAX
20
0.342
(8,69)
0.358
(9,09)
0.307
(7,80)
0.358
(9,09)
28
0.442
(11,23)
0.458
(11,63)
0.406
(10,31)
0.458
(11,63)
21
9
22
8
44
0.640
(16,26)
0.660
(16,76)
0.495
(12,58)
0.560
(14,22)
23
7
52
0.739
(18,78)
0.761
(19,32)
0.495
(12,58)
0.560
(14,22)
24
6
68
0.938
(23,83)
0.962
(24,43)
0.850
(21,6)
0.858
(21,8)
84
1.141
(28,99)
1.165
(29,59)
1.047
(26,6)
1.063
(27,0)
B SQ
A SQ
25
5
26
27
28
1
2
3
4
0.080 (2,03)
0.064 (1,63)
0.020 (0,51)
0.010 (0,25)
0.020 (0,51)
0.010 (0,25)
0.055 (1,40)
0.045 (1,14)
0.045 (1,14)
0.035 (0,89)
0.045 (1,14)
0.035 (0,89)
0.028 (0,71)
0.022 (0,54)
0.050 (1,27)
4040140 / D 10/96
NOTES: A.
B.
C.
D.
E.
All linear dimensions are in inches (millimeters).
This drawing is subject to change without notice.
This package can be hermetically sealed with a metal lid.
The terminals are gold plated.
Falls within JEDEC MS-004
POST OFFICE BOX 655303
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