DS1874T データシートの表示（PDF） - Maxim Integrated

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DS1874T

SFP+ Controller with Digital LDD Interface

Maxim Integrated 

SFP+ Controller with Digital LDD Interface

PIN

1

2

3

4

5

6

7

8, 17, 21

9

10

11

12, 13

14

15, 23

16

18

19, 20

22

24

25

26

27

28

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Pin Description

NAME

FUNCTION

RSELOUT

SCL

SDA

TXF

Rate-Select Output

I2C Serial-Clock Input

I2C Serial-Data Input/Output

Transmit-Fault Input and Output. The output is open drain.

LOS

Loss-of-Signal Input

IN1

Digital Input. General-purpose input with AS1 in SFF-8079 or RS1 in SFF-8431.

TXD

GND

Transmit-Disable Input

Ground Connection

RSEL

TXDOUT

MON4

Rate-Select Input

Transmit-Disable Output

External Monitor Input 4

MON3P,

MON3N

Differential External Monitor Input 3 and LOS Quick Trip

MON1

VCC

MON2

REFIN

DAC1, DAC2

N.C.

External Monitor Input 1 and HBATH Quick Trip

Power-Supply Input

External Monitor Input 2. Feedback voltage for APC loop and HTXP/LTXP quick trip.

Reference Input for DAC1 and DAC2

Delta-Sigma Output 1/2

No Connection

CSELOUT

Chip-Select Output. Part of the 3-wire interface to the MAX3798/MAX3799 laser driver/limiting

amplifier.

SCLOUT

Serial-Clock Output. Part of the 3-wire interface to the MAX3798/MAX3799 laser driver/limiting

amplifier.

SDAOUT

Serial-Data Input/Output. Part of the 3-wire interface to the MAX3798/MAX3799 laser driver/limiting

amplifier.

LOSOUT

OUT1

Open-Drain Receive Loss-of-Signal Output

Digital Output. General-purpose output with AS1 output in SFF-8079 or RS1 output in SFF-8431.

EP

Exposed Pad

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