DS1873 データシートの表示（PDF） - Maxim Integrated
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DS1873 Datasheet PDF : 85 Pages
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SFP+ Controller with Analog LDD Interface
Typical Operating Characteristics (continued)
(VCC = +2.85V to +3.9V, TA = +25°C, unless otherwise noted.)
DAC OUTPUT RIPPLE AT 0001h
DS1873 toc09
DAC POSITION = 0001h
FILTER
OUTPUT
0.68mV
DAC OUTPUT RIPPLE AT 3FFFh
DS1873 toc10
DAC POSITION = 3FFFh
FILTER
OUTPUT
DAC2
0.1mV OUTPUT
3V/div
DAC2
OUTPUT
3V/div
TIME (100μs/div)
TIME (100μs/div)
PIN
1
2
3
4
5
6
7
8, 18, 21
9
10
11
12, 13
14
15, 23
16, 26
17
19
20
22
24, 25
27
28
—
Pin Description
NAME
RSELOUT
SCL
SDA
TXF
LOS
IN1
TXD
GND
RSEL
TXDOUT
MON4
MON3P, MON3N
MON1
N.C.
VCC
MON2
MOD
BIAS
REFIN
DAC1, DAC2
LOSOUT
OUT1
EP
FUNCTION
Open-Drain Rate-Select Output
I2C Serial-Clock Input
I2C Serial-Data Input/Output
Transmit-Fault Input and Output. The output is open drain.
Loss-of-Signal Input
Digital Input. General-purpose input with AS1 in SFF-8079 or RS1 in SFF-8431.
Transmit-Disable Input
Ground Connection
Rate-Select Input
Transmit-Disable Output
External Monitor Input 4
Differential External Monitor Input 3 and LOS LO Quick Trip
External Monitor Input 1 and HBATH Quick Trip
No Connection
Power-Supply Input
External Monitor Input 2. Feedback voltage for APC loop and HTXP/LTXP quick trip.
MOD DAC, Delta-Sigma Output
BIAS DAC, Delta-Sigma Output
Reference Input for DAC1 and DAC2
Delta-Sigma Output 1/2
Open-Drain Receive Loss-of-Signal Output
Open-Drain Digital Output. General-purpose output with AS1 output in SFF-8079 or RS1 output
in SFF-8431.
Exposed Pad (Connect to GND)
10 ______________________________________________________________________________________
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