Texas Instruments CD74HCT20M96, CD74HCT20M, CD74HCT20E, CD74HC20M96, CD74HC20M Datasheet

CD74HC20,

/

[ /Title
(CD74H
C20,
CD74H
CT20)

Subject
(High
Speed
CMOS
Logic
Dual 4­Input

Data sheet acquired from Harris Semiconductor
SCHS130

August 1997

Features

• Buffered Inputs

• Typical Propagation Delay: 8ns at V
C

= 15pF, TA = 25oC

L

• Fanout (Over Temperature Range)

- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Wide Operating Temperature Range . . . -55

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL
Logic ICs

• HC Types

- 2V to 6V Operation

- High Noise Immunity: N

at VCC = 5V

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

V

= 0.8V (Max), VIH = 2V (Min)

IL

- CMOS Input Compatibility, I

= 30%, NIH = 30% of V

IL

≤ 1µA at VOL, V

l

CC

= 5V,

o

C to 125oC

CC

OH

CD74HCT20

High Speed CMOS Logic

Dual 4-Input NAND Gate

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

PART NUMBER

CD74HC20E -55 to 125 14 Ld PDIP E14.3
CD74HCT20E -55 to 125 14 Ld PDIP E14.3
CD74HC20M -55 to 125 14 Ld SOIC M14.15
CD74HCT20M -55 to 125 14 Ld SOIC M14.15
CD54HC20W -55 to 125 Wafer

NOTES:

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.

(oC) PACKAGE

PKG.

NO.

Pinout

CD74HC20, CD74HCT20

(PDIP, SOIC)

TOP VIEW

1A

1
2

1B

3

NC

4

1C

5

1D

6

1Y

7

GND

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright

© Harris Corporation 1997

1

14

V

CC

2D

13
12

2C
NC

11

2B

10

2A

9

2Y

8

File Number 1601.1

Functional Diagram

CD74HC20, CD74HCT20

1A

1B

NC

1C

1D

1Y

GND

1

2

3

4

5

6

7

14

V

CC

13

2D

12

2C

11

NC

10

2B

9

2A

8

2Y

TRUTH TABLE

INPUTS OUTPUT

nA nB nC nD nY

LXXXH
XLXXH
XXLXH
XXXLH

HHHHL

NOTE: H = High VoltageLevel,L =Low VoltageLevel,X =Irrelevant

HC Logic Symbol HCT Logic Symbol

nA
nB

nY

nC
nD

nA

nB

nC

nD

nY

2

CD74HC20, CD74HCT20

Absolute Maximum Ratings Thermal Information

DC Supply Voltage, VCC. . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V

DC Input Diode Current, I

IK

For VI < -0.5V or VI > VCC + 0.5V. . . . . . . . . . . . . . . . . . . . . .±20mA

DC Output Diode Current, I

OK

For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±20mA

DC Output Source or Sink Current per Output Pin, I

O

For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±25mA

DC VCC or Ground Current, I

CC orIGND

. . . . . . . . . . . . . . . . . .±50mA

Operating Conditions

Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC

Supply Voltage Range, V

HC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2V to 6V

HCT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V

DC Input or Output Voltage, VI, VO . . . . . . . . . . . . . . . . . 0V to V

Input Rise and Fall Time

2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000ns (Max)

4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500ns (Max)

6V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400ns (Max)

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

3. θJA is measured with the component mounted on an evaluation PC board in free air.

CC

Thermal Resistance (Typical, Note 3) θJA (oC/W)

PDIP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Maximum Junction Temperature. . . . . . . . . . . . . . . . . . . . . . .150oC

Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC

Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . .300oC

(SOIC - Lead Tips Only)

CC

DC Electrical Specifications

PARAMETER SYMBOL

HC TYPES

High Level Input
Voltage

Low Level Input
Voltage

High Level Output
Voltage
CMOS Loads

High Level Output
Voltage
TTL Loads

Low Level Output
Voltage
CMOS Loads

Low Level Output
Voltage
TTL Loads

Input Leakage
Current

V

IH

V

IL

V

OH

V

OL

I

I

TEST

CONDITIONS

25oC -40oC TO 85oC -55oC TO 125oC

VCC (V)

- - 2 1.5 - - 1.5 - 1.5 - V

4.5 3.15 - - 3.15 - 3.15 - V
6 4.2 - - 4.2 - 4.2 - V

- - 2 - - 0.5 - 0.5 - 0.5 V

4.5 - - 1.35 - 1.35 - 1.35 V
6 - - 1.8 - 1.8 - 1.8 V

VIH or

V

-0.02 2 1.9 - - 1.9 - 1.9 - V

IL

-0.02 4.5 4.4 - - 4.4 - 4.4 - V

-0.02 6 5.9 - - 5.9 - 5.9 - V

---------V

-4 4.5 3.98 - - 3.84 - 3.7 - V

-5.2 6 5.48 - - 5.34 - 5.2 - V

VIH or

V

0.02 2 - - 0.1 - 0.1 - 0.1 V

IL

0.02 4.5 - - 0.1 - 0.1 - 0.1 V

0.02 6 - - 0.1 - 0.1 - 0.1 V

---------V

4 4.5 - - 0.26 - 0.33 - 0.4 V

5.2 6 - - 0.26 - 0.33 - 0.4 V

VCC or

-6--±0.1 - ±1-±1 µA

GND

UNITSVI(V) IO(mA) MIN TYP MAX MIN MAX MIN MAX

3

CD74HC20, CD74HCT20

DC Electrical Specifications (Continued)

TEST

CONDITIONS

PARAMETER SYMBOL

Quiescent Device
Current

I

CC

VCC or

GND

VCC (V)

0 6 - - 2 - 20 - 40 µA

HCT TYPES

High Level Input
Voltage

Low Level Input
Voltage

High Level Output
Voltage

V

IH

- - 4.5 to

5.5

V

IL

- - 4.5 to

5.5

V

OH

VIH or

V

IL

-0.02 4.5 4.4 - - 4.4 - 4.4 - V

CMOS Loads
High Level Output

-4 4.5 3.98 - - 3.84 - 3.7 - V
Voltage
TTL Loads

Low Level Output
Voltage

V

OL

VIH or

V

IL

0.02 4.5 - - 0.1 - 0.1 - 0.1 V

CMOS Loads
Low Level Output

4 4.5 - - 0.26 - 0.33 - 0.4 V
Voltage
TTL Loads

Input Leakage
Current

I

I

V

CC

0 5.5 - ±0.1 - ±1-±1 µA

and

GND

Quiescent Device
Current

Additional Quiescent
Device Current Per

I

CC

VCC or

0 5.5 - - 2 - 20 - 40 µA

GND

∆I

CC

V

CC

-2.1

- 4.5 to

5.5
Input Pin: 1 Unit Load
(Note 4)

NOTE:

4. For dual-supply systems theorectical worst case (VI = 2.4V, VCC = 5.5V) specification is 1.8mA.

25oC -40oC TO 85oC -55oC TO 125oC

2-- 2 - 2 - V

- - 0.8 - 0.8 - 0.8 V

- 100 360 - 450 - 490 µA

UNITSVI(V) IO(mA) MIN TYP MAX MIN MAX MIN MAX

HCT Input Loading Table

INPUT UNIT LOADS

All 0.15

NOTE: Unit Load is ∆ICClimit specified in DC Electrical
Specifications table, e.g. 360µA max at 25oC.

Switching Specifications Input t

PARAMETER SYMBOL

HC TYPES

Propagation Delay,Input to
Output (Figure1)

PropagationDelay,DataInputto
Output Y

t

PLH

t

PLH

, tf = 6ns

r

, t

PHLCL

, t

PHLCL

TEST

CONDITIONS

= 50pF 2 - - 100 - 125 - 150 ns

= 15pF 5 - 8 - ----ns

V

CC

(V)

25oC -40oC TO 85oC -55oC TO 125oC

UNITSMIN TYP MAX MIN MAX MIN MAX

4.5 - - 20 - 25 - 30 ns
6 - - 17 - 21 - 26 ns

4

CD74HC20, CD74HCT20

Switching Specifications Input t

PARAMETER SYMBOL

Transition Times (Figure1) t

, tf = 6ns (Continued)

r

CONDITIONS

, t

TLH

THLCL

TEST

V

CC

(V)

= 50pF 2 - - 75 - 95 - 110 ns

4.5 - - 15 - 19 - 22 ns
6 - - 13 - 16 - 19 ns

Input Capacitance C
Power Dissipation Capacitance

C

I

PD

- - - - 10 - 10 - 10 pF

- 5-26-----pF

(Notes 5, 6)

HCT TYPES

Propagation Delay, Input to

t

PLH

, t

PHLCL

= 50pF 4.5 - - 28 - 35 - 42 ns

Output (Figure 2)
PropagationDelay,DataInputto

t

PLH

, t

PHLCL

= 15pF 5 - 11 - ----ns

Output Y
Transition Times (Figure 2) t
Input Capacitance C
Power Dissipation Capacitance

TLH

, t

I

C

PD

THLCL

= 50pF 4.5 - - 15 - 19 - 22 ns

- - - - 10 - 10 - 10 pF

- 5-38-----pF

(Notes 5, 6)

NOTES:

5. CPD is used to determine the dynamic power consumption, per gate.

6. PD = V

2

fi (CPD + CL) where fi = input frequency, CL = output load capacitance, VCC = supply voltage.

CC

25oC -40oC TO 85oC -55oC TO 125oC

UNITSMIN TYP MAX MIN MAX MIN MAX

Test Circuits and Waveforms

tr = 6ns tf = 6ns

V

t

CC

GND

TLH

t

PHL

90%
50%
10%

t

90%

50%

10%

PLH

INPUT

t

INVERTING

OUTPUT

THL

FIGURE 1. HC AND HCU TRANSITION TIMES AND PROPAGA-

TION DELAY TIMES, COMBINATION LOGIC

= 6ns

t

PLH

t

f

1.3V

10%

90%

t

3V

GND

TLH

tr = 6ns

INPUT

t

INVERTING

OUTPUT

THL

t

2.7V

1.3V

0.3V

PHL

FIGURE 2. HCT TRANSITION TIMES AND PROPAGATION

DELAY TIMES, COMBINATION LOGIC

5

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