Datasheet

MAX9242/MAX9244/MAX9246/MAX9254
21-Bit Deserializers with Programmable
Spread Spectrum and DC Balance
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS
(V
CC
= LVDSV
CC
= PLLV
CC
= +3.0V to +3.6V, V
CCO
= +3.0V to +3.6V, C
L
= 8pF, PWRDWN = high; SSG = high, open, or low;
DCB = high or low, differential input voltage |V
ID
| = 0.1V to 1.2V, input common-mode voltage V
CM
= |V
ID
/ 2| to 2.4V - |V
ID
/ 2|, unless
otherwise noted. Typical values are at V
CC
= V
CCO
= LVDSV
CC
= PLLV
CC
= +3.3V, |V
ID
| = 0.2V, V
CM
= +1.25V, T
A
= +25°C.) (Notes 6, 7, 8)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RxOUT_ 2.9 4.7 6.5
Output Rise Time CLHT
0.1 x V
C C O
to 0.9 x V
C C O
,
Fi g ur e 3
RxCLKOUT 2.0 3.3 4.1
ns
RxOUT_ 2.1 3.0 4.2
Output Fall Time CHLT
0.9 x V
C C O
to 0.1 x V
C C O
,
Fi g ur e 3
RxCLKOUT 1.10 1.94 2.70
ns
Output Rise Time (MAX9254) CLHT
0.1 x V
C C O
to 0.9 x V
C C O
,
Fi g ur e 3
RxOUT_ 1.4 2.2 3.3 ns
Output Fall Time (MAX9254) CHLT
0.9 x V
C C O
to 0.1 x V
C C O
,
Fi g ur e 3
RxCLKOUT 1.1 1.8 2.8 ns
16MHz 2560 3142
DC-balanced mode,
Figure 4
34MHz 900 1386
20MHz 2500 3164
RxIN__ Skew Margin (Note 9) RSKM
Non-DC-balanced mode,
Figure 4
40MHz 960 1371
ps
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= LVDSV
CC
= PLLV
CC
= +3.0V to +3.6V, V
CCO
= +3.0V to +5.5V, PWRDWN = high; SSG = high, open, or low; DCB = high or
low, differential input voltage |V
ID
| = 0.05V to 1.2V, input common-mode voltage V
CM
= |V
ID
/ 2| to 2.4V - |V
ID
/ 2|, unless otherwise
noted. Typical values are at V
CC
= V
CCO
= LVDSV
CC
= PLLV
CC
= +3.3V, |V
ID
| = 0.2V, V
CM
= +1.25V, T
A
= +25°C.) (Notes 1, 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
High-Impedance Output Current I
OZ
PWRDWN = low, V
OUT
= -0.3V to (V
CCO
+ 0.3V) -30 +30 µA
RxCLKOUT (Note 4) -10 -40
V
CCO
= 3.0V to 3.6V,
V
OUT
= 0V
RxOUT_ -5 -20
RxCLKOUT (Note 4) -28 -75
Output Short-Circuit Current
(Note 5)
I
OS
V
CCO
= 4.5V to 5.5V,
V
OUT
= 0V
RxOUT_ -13 -37
mA
RxOUT_
V
CCO
= 3.0V to 3.6V,
V
OUT
= 0V
RxCLKOUT (Note 4)
-16 -51
RxOUT_
Output Short-Circuit Current
(MAX9254) (Note 5)
I
OS
V
CCO
= 4.5V to 5.5V,
V
OUT
= 0V
RxCLKOUT (Note 4)
-34 -93
mA
LVDS INPUTS (RxIN__, RxCLKIN_)
Differential Input High Threshold V
TH
(Note 6) 50 mV
Differential Input Low Threshold V
TL
(Note 6) -50 mV
Input Current I
IN+
, I
IN-
PWRDWN = high or low -25 +25 µA
Power-Off Input Current I
INO+
, I
INO-
V
CC
= V
CCO
= 0V or open -40 +40 µA
-40°C to +85°C 42 78
Input Resistor 1 R
IN1
PWRDWN = high or low,
V
CC
= V
CCO
= 0V or open,
Figure 1
-40°C to +105°C 42 85
kΩ
-40°C to +85°C 246 410
Input Resistor 2 R
IN2
PWRDWN = high or low,
V
CC
= V
CCO
= 0V or open,
Figure 1
-40°C to +105°C 246 440
kΩ