Datasheet

DS1886
SFP and PON ONU Controller
with Digital LDD Interface
15Maxim Integrated
Pin Configuration Pin Description
PIN NAME FUNCTION
1 CSEL2OUT
Chip-Select Output. Part of the
3-wire interface to the MAX3945.
2 SCL I
2
C Serial-Clock Input
3 SDA
Open-Drain I
2
C Serial-Data Input/
Output
4 TXFOUT Open-Drain Transmit Fault Output
5 LOS Loss-of-Signal Input
6 IN1 Digital Maskable Fault Input
7 TXD Transmit Disable Input
8, 15,
17
GND Ground
9 RSEL Rate Select Input
10 TXDOUT Transmit Disable Output
11, 12
RSSIP,
RSSIN
Differential External Monitor Input
13 TXMON
External Monitor Input for Both
Transmit Power (TXP) and Transmit
Bias (TXB)
14, 16 V
CC
Power-Supply Input
18 DAC DAC Output
19 REFIN Reference Input for DAC Full Scale
20 CSEL1OUT
Chip-Select Output. Part of the
3-wire interface to the MAX3710.
21 SCLOUT
Serial-Clock Output. Part of the
3-wire interface to the MAX3710.
22 SDAOUT
Serial-Data Input/Output. Part
of the 3-wire interface to the
MAX3710.
23 LOSOUT
Open-Drain Receive Loss-of-
Signal Output
24 TXF Transmit Fault Input
— EP Exposed Pad. Connect to ground.
TQFN
(4mm × 5mm × 0.75mm)
TOP VIEW
DS1886
1CSEL2OUT
2SCL
3SDA
4TXFOUT
5LOS
6IN1
7TXD
EP
19 REFIN
18 DAC
17 GND
16 V
CC
15 GND
TXF LOSOUT SDAOUT SCLOUT CSEL1OUT
14 V
CC
13 TXMON
8
GND
9
RSEL
10
TXDOUT
11
RSSIP
12
RSSIN
24 23 22 21 20
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