DS1876
SFP Controller with Dual LDD Interface
Pin Configuration
TOP VIEW
21 20 19 18 17 16 15
REFIN 22
TXD2 23
APC2 24
APC1 25
VCC 26
TXF2 27
+
OUT1 28
DS1876
*EP
14 BMON1
13 PMON1
12 BMON2
11 PMON2
10 TXDOUT1
9 RSEL
8 GND
1 234567
*EXPOSED PAD.
THIN QFN
(5mm × 5mm × 0.8mm)
PIN
1
2
3
4
5
6
7
8, 18, 21
9
10
11
12
13
NAME
RSELOUT
SCL
SDA
TXFOUT
TXF1
IN1
TXD1
GND
RSEL
TXDOUT1
PMON2
BMON2
PMON1
FUNCTION
Rate-Select Output
I2C Serial-Clock Input
I2C Serial-Data Input/Output
Transmit Fault Output, Open
Drain
Transmit Fault Input 1
Digital Input. General-purpose
input, AS1 in SFF-8079, or RS1
in SFF-8431.
Transmit Disable Input 1
Ground Connection
Rate-Select Input
Transmit Disable Output 1
External Monitor Input PMON2
and HTXP2/LTXP2 Quick Trip
External Monitor Input BMON2
and HBATH2 Quick Trip
External Monitor Input PMON1
and HTXP1/LTXP1 Quick Trip
PIN
14
15
16, 26
17
19
20
22
23
24
25
27
28
—
Pin Description
NAME
BMON1
N.C.
VCC
TXDOUT2
MOD2
MOD1
REFIN
TXD2
APC2
APC1
TXF2
OUT1
EP
FUNCTION
External Monitor Input BMON1
and HBATH1 Quick Trip
No Connection
Power-Supply Input
Transmit Disable Output 2
MOD2 DAC, Delta-Sigma Output
MOD1 DAC, Delta-Sigma Output
Reference Input for DAC1 and
DAC2
Transmit Disable Input 2
APC2 DAC, Delta-Sigma Output
APC1 DAC, Delta-Sigma Output
Transmit Fault Input 2
Digital Output. General-purpose
output, AS1 output in SFF-8079,
or RS1 output in SFF-8431.
Exposed Pad (Connect to GND)
10
Maxim Integrated