SP8647

250MHz4

4

4

4

4

10/11

DS3643-1·2

The SP8647 is an ECL variable modulus divider, with

ECL10K and TTL/CMOS compatible outputs. It divides by 10

when either of the ECL control inputs, PE1 or PE2, is in the high

state and by 11 when both are low (or open circuit).

The two clock inputs are interchangeable and either will act

as a clock inhibit when connected to an ECL high level.

Normally, one input is left open circuit and the other is AC-

coupled, with externally applied bias.

FEATURES

QUICK REFERENCE DATA

°C to 170°C

Fig. 1 Pin connections - top view

DG16

CLOCK INPUT 2

NC

NC

NC

TTL/CMOS OUTPUT

NC

ECL OUTPUT

CLOCK INPUT 1

PE1

PE2

NC

NC

NC

ECL OUTPUT

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

SP8647







CONTROL INPUTS

Fig. 2 Functional diagram

ABSOLUTE MAXIMUM RATINGS

Output current

Storage temperature range

Max. junction temperature

Open collector voltage (pin 11)

Max. clock input voltage

Max. open collector current

D1

CK

Q1

D2

CK

Q2

D3

CK

Q3

D4

CK

Q4

PE1

PE2

CLOCK INPUT 1

CLOCK INPUT 2

TTL/CMOS

OUTPUT

OUTPUT

OUTPUT

Q4

2

3

1

16

5

12

11

8

9

ORDERING INFORMATION

SP8647 B DG

5962-90618 (SMD)

8V

20mA

2

65

°C to 1150°C

1

175

°C

1

12V

2·5V p-p

15mA