1.0625Gbps to 11.3Gbps, SFP+ Laser Driver
with Laser Impedance Mismatch Tolerance
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.85V to +3.63V, T = -40°C to +85°C, and Figure 1. Guaranteed by design and characterization from T = -40°C to +95°C.
A
A
Typical values are at V
noted.) (Note 1)
= +3.3V, I
= 60mA, I
= 40mA, 25I differential output load, and T = +25°C, unless otherwise
MOD A
CC
BIAS
PARAMETER
DISABLE Input Resistance
3-WIRE DIGITAL I/O SPECIFICATIONS (SDA, SCL, CSEL)
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
R
Internal pullup resistor
4.7
7.5
10
kI
PULL
Input High Voltage
Input Low Voltage
Input Hysteresis
V
2.0
V
V
V
IH
CC
V
0.8
IL
V
80
mV
HYST
V
= 0V or V , internal pullup or pull-
CC
IN
Input Leakage Current
I , I
IL IH
150
FA
down is 75kI typical
Output High Voltage
Output Low Voltage
V
External pullup is (4.7kI to 10kI) to V
External pullup is (4.7kI to 10kI) to V
V - 0.5
CC
V
V
OH
CC
V
0.4
OL
CC
3-WIRE DIGITAL INTERFACE TIMING CHARACTERISTICS (Figure 5)
SCL Clock Frequency
SCL Pulse-Width High
SCL Pulse-Width Low
SDA Setup Time
f
400
1000
kHz
Fs
SCL
t
0.5
CH
t
0.5
Fs
CL
DS
DH
t
100
100
ns
SDA Hold Time
t
ns
SCL Rise to SDA Propagation
Time
t
5
ns
ns
ns
D
CSEL Pulse-Width Low
t
500
CSW
CSEL Leading Time Before the
First SCL Edge
t
t
500
500
L
T
CSEL Trailing Time After the Last
SCL Edge
ns
Total bus capacitance on one line with
4.7kI pullup to V
SDA, SCL Load
C
B
20
pF
CC
Note 1: Guaranteed by design and characterization (T = -40NC to +95NC).
A
Note 2: BIAS is connected to 2.0V. TOUT+/TOUT- are connected through pullup inductors to a separate supply that is equal to V
.
CCT
I
= 4.92 + 0.0383 x I + 0.3692 x I
BIAS MOD
CC
Note 3: Stability is defined as [(I_measured) - (I_reference)]/(I_reference) over the listed current range, temperature, and V
=
CC
V
Q5%. V
= 3.0V to 3.45V. Reference current measured at V
, T = +25NC.
CCREF
CCREF
CCREF
A
7
7
Note 4: Measured with K28.5 data pattern at 10.7Gbps and with a (2 - 1 PRBS + 72 zeros + 2 - 1 PRBS (inverted) + 72 ones)
pattern at 11.3Gbps.
_______________________________________________________________________________________
5