HD74HC640 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74HC640

Octal Bus Transceivers (with 3-state outputs)

Hitachi -> Renesas Electronics 

HD74HC640/HD74HC643

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

Ta = 25°C

Ta = –40 to

+85°C

Item

Symbol

Propagation delay tPLH

time

t PHL

VCC (V)

2.0

4.5

6.0

Min Typ Max Min

— — 90 —

— 12 18 —

— — 15 —

Max Unit

115 ns

23

20

Output enable

t ZH

time

t ZL

2.0

— — 230 — 290 ns

4.5

— 15 46 — 58

6.0

— — 39 — 49

Output disable

t HZ

time

t LZ

2.0

— — 215 — 270 ns

4.5

— 17 43 — 54

6.0

— — 37 — 46

Output rise/fall

t TLH

time

t THL

2.0

— — 60 — 75 ns

4.5

— 4 12 — 15

6.0

— — 10 — 13

Input capacitance Cin

—

— 5 10 — 10 pF

Test Conditions

7

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