PCK940L_1

© Koninklijke Philips Electronics N.V. 2006. All rights reserved.

Product data sheet

Rev. 01 — 4 April 2006

3 of 16

Philips Semiconductors

PCK940L

Low voltage 1 : 18 clock distribution chip

5.

Pinning information

5.1 Pinning

5.2 Pin description

Fig 2.

Pin configuration for LQFP32

PCK940LBD

GND1

Q6

GND2

Q7

LVCMOS_CLK

Q8

LVCMOS_CLKSEL

PECL_CLK

Q9

PECL_CLK

Q10

Q11

GND2

002aab888

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

Table 2.

Pin description

Symbol

Pin

I/O

Type

Description

PECL_CLK

5

input

LVPECL

reference clock input

PECL_CLK

6

input

LVPECL

reference clock input

(active LOW)

LVCMOS_CLK

3

input

LVCMOS

alternative reference clock

input

LVCMOS_CLKSEL

4

input

LVCMOS

clock source select

Q0 to Q17

32, 31, 30, 28,

27, 26, 24, 23,

22, 20, 19, 18,

15, 14, 11, 10, 9

output

LVCMOS

clock outputs

GND1

1, 12, 25

-

supply

output negative power supply

GND2

2, 17

-

supply

core negative power supply

8, 16, 29

-

supply

output positive power supply

7, 21

-

supply

core positive power supply