Datasheet 74AC20TTR, 74AC20MTR, 74AC20M, 74AC20B Datasheet (SGS Thomson Microelectronics)

1/8April 2001

■ HIGH SPEED: t

PD

= 4ns (TYP.) at VCC = 5V

■ LOW POWER DISSIPATION:

I

CC

= 2µA(MAX.) at TA=25°C

■ HIGH NOISE IMMUNITY:

V

NIH

= V

NIL

= 28 % VCC (MIN.)

■ 50Ω TRANSMISSION LINE DRIVING

CAPABILITY

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

OH

| = IOL = 24mA (MIN)

■ BALANCED PROPAGATION DELAYS:

t

PLH

≅ t

PHL

■ OPERATING VOLTAGE RANGE:

V

CC

(OPR) = 2V to 6V

■ PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 20

■ IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74AC20 is an advanced high-speed CMOS
DUAL 4-INPUT NAND GATE fabricated with
sub-micron silicon gate and double-layer metal
wiring C

2

MOS tecnology.

The internal circuit is composed of 3 stages
including buffer output , which enables high noise
immunity and stable output.
All inputs and outputs are equipped with
protection circuits against stat ic discharge, giving
them 2KV ESD immunity and transient excess
voltage.

74AC20

DUAL 4-INPUT NAND GATE

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE TUBE T & R

DIP 74AC20B

SOP 74AC20M 74AC20MTR

TSSOP 74AC20TTR

TSSOPDIP SOP

74AC20

2/8

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

TRUTH TABLE

X : Don’t Ca re

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.

RECOMMENDED OPERATING CONDITIONS

1) VIN from 30 % to 70% of V

CC

PIN No SYMBOL NAME AND FUNCTION

1, 9 1A to 2A Data Inputs
2, 10 1B to 2B Data Inputs
3, 11 N.C. Not Connected
4, 12 1C to 2C Data Inputs
5, 13 1D to 2D Data Inputs

6, 8 1Y to 2Y Data Outputs

7 GND Ground (0V)

14

V

CC

Positive Supply Voltage

ABCDY

LXXXH
XLXXH
XXLXH
XXXLH
HHHHL

Symbol Parameter Value Unit

V

CC

Supply Voltage

-0.5 to +7 V

V

I

DC Input Voltage -0.5 to VCC + 0.5

V

V

O

DC Output Voltage -0.5 to VCC + 0.5

V

I

IK

DC Input Diode Current

± 20 mA

I

OK

DC Output Diode Current

± 20 mA

I

O

DC Output Current

± 50 mA

I

CC

or I

GND

DC VCC or Ground Current

± 100 mA

T

stg

Storage Temperature

-65 to +150 °C

T

L

Lead Temperature (10 sec)

300 °C

Symbol Parameter Value Unit

V

CC

Supply Voltage

2 to 6 V

V

I

Input Voltage 0 to V

CC

V

V

O

Output Voltage 0 to V

CC

V

T

op

Operating Temperature

-55 to 125 °C

dt/dv

Input Rise and Fall Time V

CC

= 3.0, 4.5 or 5.5V (note 1)

8 ns/V

74AC20

3/8

DC SPECIFICATIONS

1) Maxim um test duration 2ms, one output loaded at time

2) Incid ent wave swi tc hi ng is guara nt eed on transmi ssion line s wi t h i mpedance s as low as 50Ω

AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)

(*) Vol tage range is 3. 3V ± 0.3V
(**) Voltage range is 5.0V ±

0.5V

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

T

A

= 25°C

-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

V

IH

High Level Input
Voltage

3.0
V

O

= 0.1 V or

V

CC

-0.1V

2.1 1.5 2.1 2.1
V4.5 3.15 2.25 3.15 3.15

5.5 3.85 2.75 3.85 3.85

V

IL

Low Level Input
Voltage

3.0
V

O

= 0.1 V or

V

CC

-0.1V

1.5 0.9 0.9 0.9
V4.5 2.25 1.35 1.35 1.35

5.5 2.75 1.65 1.65 1.65

V

OH

High Level Output
Voltage

3.0

I

O

=-50 µA

2.9 2.99 2.9 2.9

V

4.5

I

O

=-50 µA

4.4 4.49 4.4 4.4

5.5

I

O

=-50 µA

5.4 5.49 5.4 5.4

3.0

I

O

=-12 mA

2.56 2.46 2.4

4.5

I

O

=-24 mA

3.86 3.76 3.7

5.5

I

O

=-24 mA

4.86 4.76 4.7

V

OL

Low Level Output
Voltage

3.0

IO=50 µA

0.002 0.1 0.1 0.1

V

4.5

I

O

=50 µA

0.001 0.1 0.1 0.1

5.5

I

O

=50 µA

0.001 0.1 0.1 0.1

3.0

I

O

=12 mA

0.36 0.44 0.5

4.5

I

O

=24 mA

0.36 0.44 0.5

5.5

I

O

=24 mA

0.36 0.44 0.5

I

I

Input Leakage
Current

5.5

V

I

= VCC or GND

± 0.1 ± 1 ± 1 µA

I

CC

Quiescent Supply
Current

5.5

V

I

= VCC or GND

22040µA

I

OLD

Dynamic Output
Current (note 1, 2)

5.5

V

OLD

= 1.65 V max

75 50 mA

I

OHD

V

OHD

= 3.85 V min

-75 -50 mA

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

T

A

= 25°C

-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

t

PLH tPHL

Propagation Delay
Time

3.3

(*)

1.5 5.0 8.5 1.0 10.0 1.0 11.0
ns

5.0

(**)

1.5 4.0 7.0 1.0 9.0 1.0 10.5

74AC20

4/8

CAPACITIVE CHARACTERISTICS

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I

CC(opr)

= CPD x VCC x fIN + ICC/2 (per gate)

TEST CIRCUIT

CL = 50pF or equivalent (includes jig and p robe capacit ance)
R

L

= R1 = 500Ω or equivalent

R

T

= Z

OUT

of pulse generator (typically 50Ω)

WAVEFORM: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)

Symbol Parameter

Test Condition Value

Unit

V

CC

(V)

T

A

= 25°C

-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

C

IN

Input Capacitance

5.0 4 pF

C

PD

Power Dissipation
Capacitance
(note 1)

5.0
f

IN

= 10MHz

33 pF

74AC20

5/8

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

a1 0.51 0.020

B 1.39 1.65 0.055 0.065
b0.5 0.020

b1 0.25 0.010

D200.787
E8.5 0.335

e2.54 0.100

e3 15.24 0.600

F7.10.280

I5.10.201

L3.3 0.130

Z 1.27 2.54 0.050 0.100

P001A

Plastic DIP-14 MECHANICAL DATA

74AC20

6/8

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A1.750.068
a1 0.1 0.2 0.003 0.007
a2 1.65 0.064

b 0.35 0.46 0.013 0.018

b1 0.19 0.25 0.007 0.010

C0.5 0.019
c1 45 (typ.)

D 8.55 8.75 0.336 0.344

E 5.8 6.2 0.228 0.244

e1.27 0.050

e3 7.62 0.300

F 3.8 4.0 0.149 0.157

G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.019 0.050

M0.680.026

S8 (max.)

P013G

SO-14 MECHANICAL DATA

74AC20

7/8

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A1.10.433

A1 0.05 0.10 0.15 0.002 0.004 0.006

A2 0.85 0.9 0.95 0.335 0.354 0.374

b 0.19 0.30 0.0075 0.0118

c 0.09 0.20 0.0035 0.0079

D 4.9 5 5.1 0.193 0.197 0.201

E 6.25 6.4 6.5 0.246 0.252 0.256

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0

o

4

o

8

o

0

o

4

o

8

o

L 0.50 0.60 0.70 0.020 0.024 0.028

c

E

b

A2

A

E1

D

1

PIN 1 IDENTIFICATION

A1

L

K

e

TSSOP14 MECHANICAL DATA

74AC20

8/8

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