DS1878 Просмотр технического описания (PDF) - Maxim Integrated
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DS1878 Datasheet PDF : 101 Pages
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SFP+ Controller with Digital LDD Interface
Pin Configuration
TOP VIEW
21 20 19 18 17 16 15
CSEL2OUT 22
VCC 23
CSEL1OUT 24
SCLOUT 25
SDAOUT 26
LOSOUT 27
+
TXF 28
DS1878
EP
14 MON1
13 MON3N
12 MON3P
11 MON4
10 TXDOUT
9 RSEL
8 GND
1 234567
THIN QFN
(5mm × 5mm × 0.75mm)
PIN
1
2
3
4
5
6
7
8, 17, 21
9
10
11
12, 13
14
15, 23
16
NAME
FUNCTION
RSELOUT
SCL
SDA
Rate-Select Output
I2C Serial-Clock Input
I2C Serial-Data Input/Output
TXFOUT Transmit Fault Output, Open Drain
LOS Loss of Signal Input
Digital Input. General-purpose
IN1
input, AS1 in SFF-8079, or RS1 in
SFF-8431.
TXD Transmit Disable Input
GND Ground Connection
RSEL Rate-Select Input
TXDOUT Transmit Disable Output
MON4 External Monitor Input 4
MON3P, Differential External Monitor Input 3
MON3N and LOS Quick Trip
MON1
External Monitor Input 1 and
HBATH Quick Trip
VCC
MON2
Power-Supply Input
External Monitor Input 2, Feedback
Voltage for APC Loop, and TXP
HI/TXP LO Quick Trip
Pin Description
PIN
NAME
FUNCTION
18
REFIN Reference Input for DAC1 and
19
DAC1 Delta-Sigma Output 1
20
DAC2 Delta-Sigma Output 2
Chip-Select Output 2. Part of 3-wire
22 CSEL2OUT interface to a laser driver/limiting
amplifier.
Chip-Select Output 1. Part of 3-wire
24 CSEL1OUT interface to a laser driver/limiting
amplifier.
Serial-Clock Output. Part of 3-wire
25
SCLOUT interface to a laser driver/limiting
amplifier.
Serial-Data Input/Output. Part of
26
SDAOUT 3-wire interface to a laser
driver/limiting amplifier.
27
LOSOUT Receive Loss-of-Signal Output
28
TXF Transmit Fault Input
—
EP
Exposed Pad. Connect to ground.
10 ______________________________________________________________________________________
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