HD74HC668RPEL 查看數據表（PDF） - Renesas Electronics

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HD74HC668RPEL

Synchronous UP/Down Decade Counter Synchronous Up/Down 4-bit binary Counter

Renesas Electronics 

HD74HC668, HD74HC669

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

Item

Maximum clock

Frequency

Propagation delay

time

Pulse width

Setup time

Hold time

Output rise/fall

time

Input capacitance

Symbol VCC (V)

fmax

2.0

4.5

6.0

tPLH

2.0

tPHL

4.5

6.0

tPLH

2.0

tPHL

4.5

6.0

tPLH

2.0

tPHL

4.5

6.0

tPLH

2.0

tPHL

4.5

6.0

tw

2.0

4.5

6.0

tsu

2.0

4.5

6.0

tsu

2.0

4.5

6.0

tsu

2.0

4.5

6.0

tsu

2.0

4.5

6.0

th

2.0

4.5

6.0

tTLH

2.0

tTHL

4.5

6.0

Cin

—

Ta = 25°C

Min Typ Max

—— 5

— — 27

— — 32

— — 200

— — 40

— — 34

— — 225

— — 45

— — 38

— — 150

— — 30

— — 26

— — 200

— — 40

— — 34

80 — —

16 — —

14 — —

100 — —

20 — —

17 — —

150 — —

30 — —

26 — —

150 — —

30 — —

26 — —

150 — —

30 — —

26 — —

5

——

5

——

5

——

— — 75

— 5 15

— — 13

— 5 10

Ta = –40 to +85°C

Min

Max Unit

Test Conditions

—

4 MHz

—

21

—

25

—

250 ns Clock to Ripple carry out

—

50

—

43

—

280 ns Clock to Q

—

56

—

48

—

190 ns Enable T to Ripple carry out

—

38

—

33

—

250 ns U/D to Ripple carry out

—

50

—

43

100

—

ns

20

—

17

—

125

—

ns Data to Clock

25

—

21

—

190

—

ns Enable P, T to Clock

38

—

33

—

190

—

ns Loadk to Clock

38

—

33

—

190

—

ns U/D to Clock

38

—

33

—

5

—

ns

5

—

5

—

—

95

ns

—

19

—

16

—

10

pF

Rev.2.00 Mar 30, 2006 page 7 of 10

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