COMMERCIALTEMPERATURERANGE

IDTCV141

1-TO-8DIFFERENTIALCLOCKBUFFER

3

PIN DESCRIPTION

Pin Name

Type

Pin #

Description

SRC_IN, SRC_IN#

IN, DIF

4,5

0.7V differential SRC input

8, 9, 12, 13, 16, 17,

DIF_[7:0], DIF_ [7:0]#

OUT, DIF

20, 21, 29, 30, 33,

0.7Vdifferentialclockoutput

34, 37, 38, 41, 42

OE[7:0]

I N

6, 7, 14, 15,

3.3V LVTTL input for enabling differential outputs (see OE_INV table)

35, 36, 43, 44

I N

26

3.3V LVTTL for power down (see OE_INV table)

IREF

I N

46

Referencecurrentfordifferentialoutput

LOCK

OUT

45

HIGH, locked

PLL/Bypass#

I N

22

1 = PLL mode, 0 = bypass, PLL OFF

HIGH_BW#

I N

28

0 = HIGH BW, 1 = LOW BW (see HIGH_BW# Selection table)

SRC_DIV2#

I N

1

LOW = divide by 2 mode

SRC_STOP

I N

27

SRC stop (see OE_INV table)

SCL

I N

23

SMBus clock

SDA

I/O, Open Collector

24

SMBus data

OE_INV

I N

40

(see OE_INV table)

INDEX BLOCK WRITE PROTOCOL

Bit

# of bits

From

Description

1

1

Master

Start

2-9

8

Master

DCh

10

1

Slave

Ack (Acknowledge)

11-18

8

Master

Register offset byte (starting byte)

19

1

Slave

Ack (Acknowledge)

20-27

8

Master

Byte count, N (0 is not valid)

28

1

Slave

Ack (Acknowledge)

29-36

8

Master

first data byte (Offset data byte)

37

1

Slave

Ack (Acknowledge)

38-45

8

Master

2nd data byte

46

1

Slave

Ack (Acknowledge)

:

Master

Nth data byte

Slave

Acknowledge

Master

Stop

INDEX BLOCK READ PROTOCOL

Master can stop reading any time by issuing the stop bit without waiting

until Nth byte (byte count bit30-37).

Bit

# of bits

From

Description

1

1

Master

Start

2-9

8

Master

DCh

10

1

Slave

Ack (Acknowledge)

11-18

8

Master

Register offset byte (starting byte)

19

1

Slave

Ack (Acknowledge)

20

1

Master

RepeatedStart

21-28

8

Master

DDh

29

1

Slave

Ack (Acknowledge)

30-37

8

Slave

Byte count, N (block read back of N

bytes), power on is 8

38

1

Master

Ack (Acknowledge)

39-46

8

Slave

first data byte (Offset data byte)

47

1

Master

Ack (Acknowledge)

48-55

8

Slave

2nd data byte

Ack (Acknowledge)

:

Master

Ack (Acknowledge)

Slave

Nth data byte

Not acknowledge

Master

Stop

INDEX BYTE WRITE

Setting bit[11:18] = starting address, bit[20:27] = 01h.

INDEX BYTE READ

Setting bit[11:18] = starting address. After reading back the first data byte,

master issues Stop bit.