HD74LS77

Rev.3.00, Jul.22.2005, page 3 of 4

Switching Characteristics

Item

Symbol

Inputs

Outputs

min.

typ.

max.

Unit

Condition

—

11

19

D

Q

—

9

17

—

10

18

Propagation delay

time

G

Q

—

10

18

ns

Ω

Testing Method

Test Circuit

Output

Input

D

G

Q

P.G.

Ω

Input

P.G.

Ω

Notes:

1.

Test is put into the each latch.

2.

3.

All diodes are 1S2074(H).

Waveform

0V

3V

0V

3V

D

G

Q

10%

90%

1.3 V

1.3 V

1.3 V

1.3 V

10%

90%

1.3 V

10%

90%

1

µs1µs

10%

90%

1.3 V

1.3 V

1.3 V

1.3 V

Notes:

1.

≤ 10 ns, t

THL

≤ 10 ns.

2.

When measuring propagation delay times from the D input, the corresponding G input must be

held high.