CD74ACT297

DIGITAL PHASE-LOCKED LOOP

SCHS297D – AUGUST 1998 – REVISED JUNE 2002

7

POST OFFICE BOX 655303

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

MIN

MAX

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

MAX

MIN

MAX

UNIT

IO = –50 µA

4.5 V

4.4

4.4

VOH

VI = VIH or VIL

IO = –24 mA

4.5 V

3.4

3.1

V

IO = –75 mA

5.5 V

3.3

IO = 50 µA

4.5 V

0.1

0.1

VOL

VI =VIH or VIL

IO = 24 mA

4.5 V

0.9

1.1

V

IO = 75 mA†

5.5 V

2.9

II

VI = VCC or GND

5.5 V

±0.1

±1

mA

ICC (MSI)

VI = VCC or GND

5.5 V

8

80

mA

ICC (SSI/FF)

VI = VCC or GND

5.5 V

4

40

mA

DICC

VI = VCC –2.1 V

4.5 V to 5.5 V

2.4

2.8

mA

† Test one output at a time for a 1-second maximum duration. Measurement is made by forcing current and measuring voltage to minimize power

dissipation. Test verifies a minimum 50-

Ω transmission-line drive capability at 85°C.

ACT INPUT LOAD

INPUT

UNIT

LOAD†

ENCTR, D/U

0.1

A, B, C, D, K CLK,

φA2

0.2

I/D CLK,

φA1, φB

0.5

† Unit Load is

∆ICC limit specified in

electrical characteristics table (e.g.,

2.4 mA at 25

°C).

timing requirements over recommended supply-voltage range and recommended operating

free-air temperature range (unless otherwise noted)

PARAMETER

TA = 25°C

MIN

MAX

UNIT

PARAMETER

MIN

MAX

MIN

MAX

UNIT

f lk

Clock frequency

K CLK

55

45

MHz

fclock

Clock frequency

I/D CLK

40

35

MHz

t

Pulse duration

K CLK

6

8

ns

tw

Pulse duration

I/D CLK

7

9

ns

t

Setup time before K CLK

↑

D/U

13

17

ns

tsu

Setup time before K CLK

↑

ENCTR

12

16

ns

th

Hold time after K CLK

↑

D/U

3

7

ns

th

Hold time after K CLK

↑

ENCTR

2

6

ns