DS21554 Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated

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Компоненты Описание

производитель

DS21554

DS21354 (3.3V) and DS21554 (5V) E1 Single Chip Transceivers (SCT)

Dallas Semiconductor -> Maxim Integrated 

DS21354 & DS21554

PIN

SYMBOL

TYPE DESCRIPTION

40

TCLKI

I

Transmit Clock Input

41

TCLKO

O

Transmit Clock Output

50

TDATA

I

Transmit Data

49

TESO

O

Transmit Elastic Store Output

14

TEST

I

Test

34

TLCLK

O

Transmit Link Clock

35

TLINK

I

Transmit Link Data

39

TNEGI

I

Transmit Negative Data Input

42

TNEGO

O

Transmit Negative Data Output

38

TPOSI

I

Transmit Positive Data Input

43

TPOSO

O

Transmit Positive Data Output

32

TRING

O

Transmit Analog Ring Output

47

TSER

I

Transmit Serial Data

48

TSIG

I

Transmit Signaling Input

52

TSSYNC

I

Transmit System Sync

37

TSYNC

I/O Transmit Sync

51

TSYSCLK

I

Transmit System Clock

29

TTIP

O

Transmit Analog Tip Output

31

TVDD

–

Transmit Analog Positive Supply

30

TVSS

–

Transmit Analog Signal Ground

77

WR*(R/W*)

I

Write Input(Read/Write)

22

XTALD

O

Quartz Crystal Driver

4.1 PIN FUNCTION DESCRIPTION

4.1.1 Transmit Side Pins

Signal Name:

TCLK

Signal Description: Transmit Clock

Signal Type:

Input

A 2.048 MHz primary clock. Used to clock data through the transmit side formatter.

Signal Name:

TSER

Signal Description: Transmit Serial Data

Signal Type:

Input

Transmit NRZ serial data. Sampled on the falling edge of TCLK when the transmit side elastic store is

disabled. Sampled on the falling edge of TSYSCLK when the transmit side elastic store is enabled.

Signal Name:

TCHCLK

Signal Description: Transmit Channel Clock

Signal Type:

Output

A 256 kHz clock which pulses high during the LSB of each channel. Synchronous with TCLK when the

transmit side elastic store is disabled. Synchronous with TSYSCLK when the transmit side elastic store is

enabled. Useful for parallel to serial conversion of channel data.

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