HD74HC646 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74HC646

Octal Bus Transceivers/Registers with Multiplexed 3-state outputs

Hitachi -> Renesas Electronics 

HD74HC646/HD74HC648

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

Ta = 25°C

Ta = –40 to

+85°C

Item

Maximum clock

frequency

Symbol

f max

VCC (V)

2.0

4.5

Min Typ Max Min

——5 —

— — 27 —

Max Unit

4

ns

21

6.0

— — 32 — 25

Propagation delay tPLH

time

t PHL

2.0

— — 170 — 215 ns

4.5

— 14 34 — 43

6.0

— — 29 — 37

t PLH

2.0

— — 150 — 190 ns

t PHL

4.5

— 14 30 — 38

6.0

— — 26 — 33

t PLH

2.0

— — 220 — 275 ns

t PHL

4.5

— 18 44 — 55

6.0

— — 37 — 47

t PLH

2.0

— — 170 — 215 ns

t PHL

4.5

— 15 34 — 43

6.0

— — 29 — 37

t PLH

2.0

— — 170 — 215 ns

t PHL

4.5

— 16 34 — 43

6.0

— — 29 — 37

Output enable

t ZH

time

t ZL

2.0

— — 150 — 190 ns

4.5

— 17 30 — 38

6.0

— — 26 — 33

Output disable

t LZ

time

t HZ

2.0

— — 150 — 190 ns

4.5

— 20 30 — 38

6.0

— — 26 — 33

Setup time

t su

2.0

100 — — 125 — ns

4.5

20 3 — 25 —

6.0

17 — — 21 —

Hold time

th

2.0

5 —— 5

— ns

4.5

5 0 —5

—

6.0

5 —— 5

—

Test Conditions

Clock AB to B or

Clock BA to A

A or B input to B or A output

(HD74HC646 only)

A or B input to B or A output

(HD74HC648 only)

Clock BA or Clock AB input to

A or B output

Select BA or Select AB input to

A or B output, with A or B high

Select BA or Select AB input to

A or B output, with A or B low

Control G input or Direction to

A or B output

Control G input to A or B

output

7

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