Datasheet

MAX9247
27-Bit, 2.5MHz-to-42MHz
DC-Balanced LVDS Serializer
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(V
CC_
= +3.0V to +3.6V, R
L
= 100Ω ±1%, C
L
= 5pF, PWRDWN = high, PRE = low, T
A
= -40°C to +105°C, unless otherwise noted.
Typical values are at V
CC_
= +3.3V, T
A
= +25°C.) (Note 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
PCLK_IN TIMING REQUIREMENTS
MAX9247ECM 23.8 400.0
Clock Period t
T
Figure 2
MAX9247GCM 28.6 400.0
ns
MAX9247ECM 2.5 42.0
Clock Frequency f
CLK
MAX9247GCM 2.5 35.0
MHz
Clock Frequency Difference from
Deserializer Reference Clock
∆f
CLK
-2 +2 %
Clock Duty Cycle DC t
HIGH
/t
T
or t
LOW
/t
T
, Figure 2 35 50 65 %
Clock Transition Time t
R
, t
F
Figure 2 2.5 ns
SWITCHING CHARACTERISTICS
PRE = low 280 370
Output Rise Time t
RISE
20% to 80%,
V
OD
≥ 250mV, Figure 3
PRE = high 240 320
ps
PRE = low 280 370
Output Fall Time t
FALL
80% to 20%,
V
OD
≥ 250mV, Figure 3
PRE = high 240 320
ps
Input Setup Time t
SET
Figure 4 3 ns
Input Hold Time t
HOLD
Figure 4 3 ns
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC_
= +3.0V to +3.6V, R
L
= 100Ω ±1%, PWRDWN = high, PRE = low, T
A
= -40°C to +105°C, unless otherwise noted. Typical
values are at V
CC_
= +3.3V, T
A
= +25°C.) (Notes 1, 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Differential Output Resistance R
O
78 110 147 Ω
PRE = 0 15 25
2.5MHz
PRE = 1 27
PRE = 0 18 25
5MHz
PRE = 1 27
PRE = 0 23 28
10MHz
PRE = 1 30
PRE = 0 33 39
20MHz
PRE = 1 42
PRE = 0 50 65
35MHz
PRE = 1 69
PRE = 0 60 70
Worst-Case Supply Current
I
CCW
R
L
= 100Ω ±1%,
C
L
= 5pF,
continuous 10
transition words
42MHz
PRE = 1 75
mA
Power-Down Supply Current I
CCZ
(Note 4) 50 µA