PEF2045 datasheet(4/53 Pages) SIEMENS

Part #	PEF2045

Description	Memory Time Switch CMOS (MTSC)

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Manufacturer	SIEMENS [Siemens Semiconductor Group]

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Semiconductor Group

4

PEB 2045

PEF 2045

Pin Definitions and Functions (cont’d)

Pin No.

P-LCC

Pin No.

P-DIP

Symbol

Input (I)

Output (O)

Function

25

23

WR

I

Write: This signal initiates a write operation.

The WR input is internally sampled only if CS is

active. In this case the MTSC loads an internal

register with data from the data bus at the rising

edge of WR. WR is active low.

26

27

29

30

31

32

33

34

24

25

26

27

28

29

30

31

DB0

DB1

DB2

DB3

DB4

DB5

DB6

DB7

I/O

Data Bus: The data bus is used for

communication between the MTSC and a

processor.

35

36

37

38

40

41

42

43

32

33

34

35

36

37

38

39

OUT7

OUT6

OUT5

OUT4

OUT3

OUT2

OUT1

OUT0

0

PCM-Output Port: Serial data is sent by these

lines at standard CMOS or TTL levels. These

pins can be tristated.

44

40

CLK

I

Clock: 4096- or 8192-kHz device clock.

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PEF2045 Datasheet(PDF) 4 Page - Siemens Semiconductor Group

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