HD74HC620, HD74HC623

Rev.2.00 Mar 30, 2006 page 6 of 11

Ta = 25

°C

Ta = –40 to +85

°C

Item

Min

Typ

Max

Min

Max

Unit

Test Conditions

2.0

—

—

100

—

125

4.5

—

12

20

—

25

Propagation delay

time

6.0

—

—

17

—

21

ns

2.0

—

—

150

—

190

4.5

—

12

30

—

38

Output enable

time

6.0

—

—

26

—

33

ns

2.0

—

—

150

—

190

4.5

—

16

30

—

38

Output disable

time

6.0

—

—

26

—

33

ns

2.0

—

—

60

—

75

4.5

—

4

12

—

15

Output rise/fall

time

6.0

—

—

10

—

13

ns

Input capacitance

Cin

—

—

5

10

—

10

pF

Test Circuit

HD74HC620

A1

OPEN

GND

C =

50 pF

GBA

GAB

B1

Ω

S1

1 k

Ω

S2

L

TEST

S2

t

/ t

PLH

PHL

OPEN

GND

t

/ t

ZH

HZ

t

/ t

ZL

LZ

Output

Input

Pulse Generator

2. A2–B2, A3–B3, A4–B4, A5–B5, A6–B6, A7–B7, A8–B8 are identical to above load circuit.

3. S1 is a input / output swich.