Texas Instruments CD74HCT20M96, CD74HCT20M, CD74HCT20E, CD74HC20M96, CD74HC20M Datasheet
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Data sheet acquired from Harris Semiconductor SCHS130
August 1997
CD74HC20,
CD74HCT20
High Speed CMOS Logic
Dual 4-Input NAND Gate
[ /Title (CD74H C20, CD74H CT20) /Subject (High Speed CMOS Logic Dual 4- Input
Features
•Buffered Inputs
•Typical Propagation Delay: 8ns at VCC = 5V, CL = 15pF, TA = 25oC
•Fanout (Over Temperature Range)
-Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
-Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
•Wide Operating Temperature Range . . . -55oC to 125oC
•Balanced Propagation Delay and Transition Times
•Significant Power Reduction Compared to LSTTL Logic ICs
•HC Types
-2V to 6V Operation
-High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
•HCT Types
-4.5V to 5.5V Operation
-Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min)
-CMOS Input Compatibility, Il ≤ 1 A at VOL, VOH
Description
The Harris CD74HC20, CD74HCT20, logic gates utilize silicon gate CMOS technology to achieve operating speeds similar to LSTTL gates with the low power consumption of standard CMOS integrated circuits. All devices have the ability to drive 10 LSTTL loads. The 74HCT logic family is functionally pin compatible with the standard 74LS logic family.
Ordering Information
|
TEMP. RANGE |
|
PKG. |
PART NUMBER |
(oC) |
PACKAGE |
NO. |
CD74HC20E |
-55 to 125 |
14 Ld PDIP |
E14.3 |
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CD74HCT20E |
-55 to 125 |
14 Ld PDIP |
E14.3 |
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CD74HC20M |
-55 to 125 |
14 Ld SOIC |
M14.15 |
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CD74HCT20M |
-55 to 125 |
14 Ld SOIC |
M14.15 |
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CD54HC20W |
-55 to 125 |
Wafer |
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NOTES: |
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1.When ordering, use the entire part number. Add the suffix 96 to obtain the variant in the tape and reel.
2.Die for this part number is available which meets all electrical specifications. Please contact your local sales office or Harris customer service for ordering information.
Pinout
CD74HC20, CD74HCT20
(PDIP, SOIC)
TOP VIEW
1A |
1 |
|
14 |
VCC |
1B |
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|
|
2D |
2 |
|
13 |
||
NC |
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2C |
3 |
|
12 |
||
1C |
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|
NC |
4 |
|
11 |
||
1D |
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|
2B |
5 |
|
10 |
||
1Y |
|
|
|
2A |
6 |
|
9 |
||
GND |
|
|
|
2Y |
7 |
|
8 |
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. |
File Number 1601.1 |
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Copyright © Harris Corporation 1997 |
1 |
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CD74HC20, CD74HCT20
Functional Diagram
1 |
14 |
1A |
VCC |
2 |
13 |
1B |
2D |
3 |
12 |
NC |
2C |
4 |
11 |
1C |
NC |
5 |
10 |
1D |
2B |
6 |
9 |
1Y |
2A |
7 |
8 |
GND |
2Y |
TRUTH TABLE
|
INPUTS |
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OUTPUT |
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nA |
nB |
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nC |
nD |
nY |
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L |
X |
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X |
X |
H |
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X |
L |
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X |
X |
H |
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X |
X |
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L |
X |
H |
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X |
X |
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X |
L |
H |
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H |
H |
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H |
H |
L |
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NOTE: H = High Voltage Level, L = Low Voltage Level, X = Irrelevant |
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HC Logic Symbol |
|
HCT Logic Symbol |
nA |
|
nA |
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nB |
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nY |
nB |
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nC |
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nY |
nD |
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nC |
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nD |
2
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