Datasheet HD74HCT541, HD74HCT540 Datasheet (HIT)

HD74HCT540/HD74HCT541

Octal Buffers/Line Drivers (with 3-state outputs)

Description

The HD74HCT540 is an inverting buffer and the HD74HCT541 is a non-inverting buffer. The 3-state
control gate operates as a two-input NOR such that if either G1 or G2 are high, all eight outputs are in the
high-impedance state.

Features

• LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility

• High Speed Operation: tpd (A to Y) = 12 ns typ (CL = 50 pF)

• High Output Current: Fanout of 15 LSTTL Loads

• Wide Operating Voltage: VCC = 4.5 to 5.5 V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

Function Table

Inputs Outputs Y
G

1

LL L H L
LL H L H
HX X Z Z
XH X Z Z

X : irrelevant
Z : Off (high-impedance) state of a 3-state output.

G

2

A HD74HCT540 HD74HCT541

HD74HCT540/HD74HCT541

Pin Arrangement

HD74HCT540

G

1

1

20

V

CC

HD74HCT541

A1
A2
A3
A4
A5
A6
A7
A8

GND

G

A1

2
3
4
5
6
7
8
9

10

19
18
17
16
15
14
13
12
11

G2
Y
Y2
Y3
Y4
Y5
Y6
Y7
Y8

1

(Top view)

1

1

2

20
19

V
G2

CC

A2
A3
A4
A5
A6
A7
A8

GND

3
4
5
6
7
8
9

10

18
17
16
15
14
13
12
11

Y
Y2
Y3
Y4
Y5
Y6
Y7
Y8

1

(Top view)

2

HD74HCT540/HD74HCT541

Absolute Maximum Ratings

Item Symbol Rating Unit

Supply voltage range V
Input voltage V
Output voltage V
Output current I
DC current drain per VCC, GND ICC, I
DC input diode current I
DC output diode current I
Power dissipation per package P

CC

IN

OUT

OUT

GND

IK

OK

T

Storage temperature Tstg –65 to +150 °C

DC Characteristics

Ta = –40 to

Ta = 25°C

Item Symbol Min Typ Max Min Max Unit V

Input voltage V

Output voltage V

IH

V

IL

OH

2.0 — — 2.0 — V 4.5 to

— — 0.8 — 0.8 V 4.5 to

4.4 — — 4.4 — V 4.5 Vin = VIH or VILIOH = –20 µA

4.18 — — 4.13 — 4.5 IOH = –6 mA

V

OL

— — 0.1 — 0.1 V 4.5 Vin = VIH or VILIOL = 20 µA
— — 0.26 — 0.33 4.5 IOL = 6 mA

Off-state output

I

OZ

——±0.5 — ±5.0 µA 5.5 Vin = VIH or VIL,

current
Input current Iin — — ±0.1 — ±1.0 µA 5.5 Vin = VCC or GND
Quiescent current I

CC

— — 4.0 — 40 µA 5.5 Vin = VCC or GND, Iout = 0 µA

+85°C Test Conditions

–0.5 to +7.0 V
–0.5 to VCC + 0.5 V
–0.5 to VCC + 0.5 V

±35 mA
±75 mA
±20 mA
±20 mA

500 mW

(V)

CC

5.5

5.5

Vout = V

or GND

CC

3

HD74HCT540/HD74HCT541

AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)

Ta = –40 to

Ta = 25°C

Item Symbol Min Typ Max Min Max Unit V

Propagation delay t
time t

Output enable t
time t
Output disable t
time t
Output rise/fall t
time t

PLH

PHL

t

PLH

t

PHL

ZL

ZH

LZ

HZ

TLH

THL

— 11 20 — 25 ns 4.5 HD74HCT540 only
— 12 20 — 25 4.5
— 10 23 — 29 ns 4.5 HD74HCT541 only
— 13 23 — 29 4.5
— 16 30 — 38 ns 4.5
— 20 30 — 38 4.5
— 15 30 — 38 ns 4.5
— 15 30 — 38 4.5
— 4 12 — 15 ns 4.5
— 4 12 — 15 4.5

Input capacitance Cin — 5 10 — 10 pF —

+85°C Test Conditions

(V)

CC

4

24.50

25.40 Max

Unit: mm

1120

6.30

1

0.89

1.27 Max

2.54 ± 0.25

1.30

10

0.48 ± 0.10

7.00 Max

0.51 Min

2.54 Min 5.08 Max

Hitachi Code
JEDEC
EIAJ
Weight

7.62

+ 0.11

0.25

– 0.05

0° – 15°

(reference value)

DP-20N
—
Conforms

1.26 g

20

Unit: mm

12.6

13 Max

11

5.5

1

0.80 Max

1.27

*0.42 ± 0.08

0.40 ± 0.06

*Dimension including the plating thickness

Base material dimension

10

0.12

0.10 ± 0.10

0.15

M

2.20 Max

7.80

0.20 ± 0.04

*0.22 ± 0.05

0.70 ± 0.20

Hitachi Code
JEDEC
EIAJ
Weight

(reference value)

+ 0.20
– 0.30

1.15

0° – 8°

FP-20DA
—
Conforms

0.31 g

20

Unit: mm

12.8

13.2 Max
11

7.50

1

0.935 Max

1.27

*0.42 ± 0.08

0.40 ± 0.06

*Dimension including the plating thickness

Base material dimension

10

0.12

0.20 ± 0.10

0.15

2.65 Max

M

10.40

0.25 ± 0.04

*0.27 ± 0.05

0.70

Hitachi Code
JEDEC
EIAJ
Weight

(reference value)

+ 0.25
– 0.40

1.45

+ 0.57
– 0.30

0° – 8°

FP-20DB
Conforms
—

0.52 g

20 11

110

+0.08

*0.22

–0.07

0.20 ± 0.06

6.50

6.80 Max

0.65 Max

0.65

0.13

Unit: mm

4.40

1.0

M

6.40 ± 0.20

0.10

1.10 Max

*Dimension including the plating thickness

Base material dimension

0.15 ± 0.04

*0.17 ± 0.05

+0.03

–0.04

0.07

0° – 8°

Hitachi Code
JEDEC
EIAJ

(reference value)

Weight

0.50 ± 0.10

TTP-20DA
—
—

0.07 g

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for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
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failure rates or failure modes in semiconductor devices and employ systemic measures such as fail­safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
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